Vibroengineering Procedia: Table of Contents

Research on strength testing technology for aircraft cargo hold restraint nets

Lina, Ma — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 500-506.
Ma Lina, Li Lei
In response to the limitations of traditional transport aircraft cargo hold barrier net test methods in terms of boundary support and load simulation, an innovative test technology framework was proposed. By establishing the full net surface cargo simulation technology supported by rigid boundary, the support constraints distributed at multiple points in actual working conditions are effectively reproduced. Furthermore, based on multi-sensor synchronous monitoring, a precise testing method for flexible structures was developed. This method tracks real-time interface load data at connection points, quantitatively analyzes the load distribution along load transfer paths, and systematically evaluates the mechanical response characteristics of the restraint net. The results demonstrate that this approach ensures the reliability of test data while significantly improving the stability of strength verification for flexible structures, successfully addressing the issues of uneven loading and result fluctuations caused by structural flexibility in traditional tests. The proposed test technology framework provides a reusable solution for strength verification of similar flexible structures, offering valuable engineering references for the safe design of air cargo system.

High-pressure high-temperature synthesis of WC-Co composites: overcoming the hardness-toughness trade-off through thermobaric processing

Mukhamedova, Ziyoda — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 533-541.
Ziyoda Mukhamedova, Sherzod Fayzibayev, Oleg Ignatenko, Rustam Kuchkarbayev
This study presents a novel high-pressure, high-temperature (HPHT) synthesis route for WC-Co cemented carbides, aiming to overcome the classic hardness-toughness trade-off. WC-Co composites were synthesized directly from elemental W, C, and Co under thermobaric conditions (4-8 GPa, 1200-2200 °C), enabling in situ WC formation and densification in a single step. Structural characterization (XRD, SEM, TEM), mechanical testing (hardness, fracture toughness, wear resistance), and electrophysical analysis (resistivity, magnetic saturation) were performed. The synthesized composites achieved 13-15 GPa hardness and 12-14 MPa·m1/2 fracture toughness, surpassing typical WC-6Co grades (12-14 GPa hardness and 8-11 MPa·m1/2 toughness). These findings demonstrate that HPHT synthesis yields dense, homogeneous WC-Co materials with superior balance of mechanical properties and thermal stability, providing a viable alternative to conventional sintering.

Technology for producing modified polymer sulfur bitumen and its properties

Mamatmuminov, Alisher — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 556-562.
Alisher Mamatmuminov, Sadikov Ibragim, Iftixor Xoshimov
This study presents the development of a technology for producing modified polymer-sulfur bitumen, intended for use as a binder in asphalt concrete for road and pavement construction. The main objective of the research is to improve the heat resistance, durability, and mechanical performance of asphalt pavements operating under high-temperature climatic conditions. The modification process involves incorporating sulfur and polymer additives into bitumen at controlled temperatures to enhance its structural stability. Experimental tests were conducted to investigate the influence of various modifiers, including polyethylene, polyethylene wax, and complex esters, on the physical and mechanical properties of the resulting polymer-sulfur bitumen. The study reveals that an optimal composition containing 3 % polyethylene wax (M2 modifier) significantly increases softening temperature and viscosity, indicating improved resistance to deformation and high thermal loads. The obtained results confirm that polymer-sulfur modification is an effective method to produce cost-efficient, durable, and environmentally sustainable binders for hot climate regions such as Uzbekistan.

Road zoning in the Fergana Valley based on the level of traffic safety

Urokov, Aslidin — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 268-275.
Aslidin Urokov, Dilmurod Tashev, Sherali Tojiboev, Zafar Utashov
The Fergana Valley is one of the most densely populated and traffic-intensive regions of Uzbekistan, where road safety remains a critical concern. This study develops a comprehensive zoning approach based on traffic safety levels by integrating statistical accident data, roadway characteristics, climatic conditions, and traffic flow parameters. A multilevel analysis was conducted to evaluate the influence of road geometry, pavement condition, traffic density, heavy-vehicle intensity, and environmental factors on accident frequency and severity. The methodology includes the calculation of a composite safety indicator incorporating relative accident rate, combined influence factor, and road-climate criteria. Measurement procedures, uncertainty estimation, and confidence intervals were applied to ensure the reliability of the collected data. The resulting zoning scheme divides the region into distinct safety categories, providing a practical framework for traffic management, infrastructure planning, and targeted accident-reduction measures. The findings highlight key risk factors and demonstrate the importance of region-specific safety zoning for improving transport operation efficiency and reducing accident risks.

Vibration-resistant mixed binders using man-made burnt rocks for transport infrastructure

Bolotov, Taalaibek T. — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 325-331.
Taalaibek T. Bolotov, Akymbek A. Abdykalykov, Alaybek B. Kurbanbaev, Islan K. Omurbekov, Rashidbek Hudaykulov, Barno Salimova, Dilshod Aralov
This study presents the characteristics of man-made wastes, specifically burnt rocks formed by the self-combustion of coal-bearing waste dumps, whose chemical and mineralogical composition depends on the origin of the basin. The aim of this research is to assess the feasibility of using these burnt rocks as components of mixed mineral binders and to evaluate their influence on mechanical and dynamic performance parameters. A comprehensive analysis of their physical, chemical, and structural properties was carried out, demonstrating their compatibility with conventional binder materials. The novelty of this study lies in the first systematic use of locally available burnt rocks (glyage) in vibration-resistant binder compositions for transport infrastructure, expanding the raw material base of construction materials while reducing environmental impact. The developed binders achieved compressive strengths up to 17.6 MPa, sufficient for structural layers of pavement bases and subgrade stabilization. Moreover, these mixed binders can modify the dynamic stiffness and damping behavior of pavement structures under moving vehicle loads, establishing a scientific link between binder composition and vibration control in transport engineering. These results are directly relevant to vibration engineering, as the dynamic stiffness and damping behavior of the developed binders influence vibration propagation and attenuation in transport pavements, ensuring longer service life and reduced noise and deformation under dynamic traffic loads.

Stress-strain state of a welded high-strength steel pipeline in the presence of surface defects

Dziubyk, Andrii — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 615-625.
Andrii Dziubyk, Andriy Dzhus, Liudmyla Dziubyk, Yaroslav Kapushchak, Yurii Porokhovskyi, Vitaliy Korendiy
The construction of main pipelines is now predominantly carried out using high-strength steels. This makes it possible to increase pipeline capacity while maintaining the existing pipe geometry. However, the issue of ensuring the strength of such pipelines in the presence of surface defects is still relevant. This is especially true for pipeline segments that are located in hard-to-reach places, and therefore, it is difficult to repair and restore. At the same time, the introduction of high-strength steels involves a complex system of material alloying and special thermo-mechanical strengthening technologies. As a result, special structures of increased strength can be produced, but they are sensitive to reheating, in particular when welding technologies are used. This is due to the formation of a special zone of thermal deformation influence in the vicinity of the weld. Material properties of the pipes differ from their original characteristics. The stress-strain state is formed, which also affects the strength of the welded pipeline. The nature of the stress-strain state of welded joints of pipes made of high-strength materials differs from the well-studied stress distributions in pipelines built in the past sixty-eighty years of the past century. In particular, several localized maxima of stresses can be located not only on the weld axis but also in the zone of thermal deformation influence. Therefore, it is important to evaluate the effect of weld stresses in welded joints of high-strength steel pipes on the strength of the pipeline in the presence of surface defects. Since the defect may be located at an arbitrary distance from the weld axis, the predicted strength of the welded pipeline segment can vary significantly.

Reducing toxic emissions and vibration levels from automobile engines by using gasoline with oxygen-containing additives

Bazarov, Baxtiyor — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 393-399.
Baxtiyor Bazarov, Abutolib Sobirjonov, Shuxrat Alimov, Akmal Azimov, Abdirashidov Aslidin
This article studies specific methods for reducing harmful gases, noise and vibration levels from gasoline light-duty vehicles. For this purpose, scientific research on the rational selection of the composition of complex oxygenated additives in gasoline and the efficiency of vehicle operation on this fuel was studied. Also, changes in the operational performance of light-duty vehicles as a result of the selection and use of the concentration of complex oxygenated gasoline were determined based on the results of experimental research. The use of oxygenated gasoline with a complex composition in automobiles compared to the base gasoline – AI-92, has resulted in a reduction in exhaust gas emissions by CO – 28-36 %, CH – 13-32 %, NOx – 47-49 %, CO2 – 70-81 %, and a reduction in noise level by 4-6 dB due to reduced detonation.

Tensile strength of concrete reinforced with combined steel and basalt fibers

Akmaljon, Akhmedov — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 493-499.
Akhmedov Akmaljon, Bakhtiyor Maksud ugli, Abdurasul Martazaev, Ravshanbek Mavlonov, Odiljon Fozilov
The article examines how to enhance the load bearing capacity and tensile strength of the concrete structures by dispersing reinforcement using a hybrid mixture of steel and basalt fibers. This experiment used locally available coarse and fine aggregates of the Namangan area, steel and basalt fibers which were manufactured in Uzbekistan. Experimentally Residual tensile strength Residual tensile strength was tested on prismatic specimens 150×150×600 mm. The findings revealed that plain concrete failed brittlely with sudden disbanding whilst fiber-reinforced concrete failed progressively as a consequence of bridging effect of the fibers that supported the integrity of the specimen. It was found out that with an addition of content of steel fibers there was a progressive increase in residual tensile strength with the best performance being recorded at 3 % steel fibers and 0.2 % basalt fibers. The results substantiate the assumption that the joint use of steel and basalt fibers considerably increases the resistance to crack propagation, strength and ductile properties of concrete.

Static push out test of rectangular steel tube concrete components

Wang, Yiping — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 542-548.
Yiping Wang, Yinfeng Dong, Feipeng Liu, Hongxing Li
The interface bonding behavior of concrete-filled rectangular steel tubular (CFST) members was studied by static push out test system. The influence of two types of core concrete, ordinary concrete and high ductility concrete, on the interfacial bond strength is analyzed, and the failure mechanism and strain distribution characteristics are revealed. The test results show that the ultimate bond strength of high ductility concrete (HDC) specimens is 36 % lower than that of ordinary concrete, but it has more uniform strain distribution characteristics. The research results provide a theoretical basis for the interface design of composite structures.

Influence of angular speed of tedder on kinematic parameters of linter machine drive

Yunusov, S. Z. — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 839-844.
S. Z. Yunusov, D. A. Kasimova
This article investigates the influence of the tedder’s angular speed on the kinematic and power characteristics of the drive system of the 5LP linter machine. The linter machine is a complex technological unit used to remove residual fibres from the surface of cotton seeds. One of the key factors determining linting efficiency is the interaction between the tedder and the seed roller inside the machine’s working chamber. A detailed kinematic and force analysis is presented, taking into account the resistance forces generated by the seed roller during its movement and processing. Particular attention is given to the development of a calculation model that describes the interaction between the tedder blades and the seed roller. In this model, each blade is treated as a cantilever beam subjected to variable loads resulting from the non-uniform mass and density distribution of the seed material. The analysis demonstrates that variations in the mass and density of the seed roller significantly affect the load transmitted to the drive and the stability of the saw cylinder. The obtained results enable more accurate selection of drive parameters and optimisation of the operating modes of the linter machine. These findings are crucial for improving the productivity and reliability of the equipment, as well as for accounting for both transient and steady-state operating conditions in real industrial environments.

Graphical analytical modeling of the kinematic scheme of a rock-piston pump

Alimov, Bakhtiyar — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 803-809.
Bakhtiyar Alimov, Rakhmat Sindarov
Two kinematic diagrams are presented, consisting of two combined toggle mechanisms and a piston pump. Kinematic calculations of the moving link parameters for both kinematic diagrams resulted in the determination of the displacement of the working and idle stroke lengths S of the piston as a function of the toggle mechanism swing angle φ and the change in the toggle length and crank radius of the piston pump. The numerical value of the coefficient K of the average toggle mechanism slider velocity, K= 2, and the displacement of the piston stroke S were obtained: for a toggle-piston pump, S= 1.25, and for a crank-toggle mechanism, SK= 0.7 m. Various asymmetric phase angles were calculated for the working φp and idle φx strokes of the slider during rotation of the toggle mechanism crank for both kinematic diagrams. The relationship between the center distance α and the position of the fixed support point O1 of the crank axis of rotation to the support point O2 of the rocker arm is obtained. The numerical values of the stroke displacement SD, linear velocity VD, and acceleration αD of the pump piston for both kinematic diagrams of the rocker-piston pump mechanism are presented in tabular form by numerical values and in kinematic diagrams.

Magnetoelastic oscillation of current-carrying plates in an alternating magnetic field

Indiaminov, Ravshan — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 237-243.
Ravshan Indiaminov, Adiljon Djuraev, Sulton Khakberdiyev, Shukhrat Nematov, Muhammad Indiaminov
Modern technological advancements, particularly in micro- and nanoelectronics, aerospace engineering, sensor systems, and robotics, necessitate a deeper understanding of how structural elements behave under various physical influences. One significant and relevant phenomenon is magnetoelastic interaction, which involves how the mechanical behavior of current-carrying elastic bodies is affected not only by external loads but also by internal electromagnetic processes. Current-carrying plates, commonly utilized in micro- and nanoelectronics, respond to external fields by altering their stress-strain states. To accurately model these processes, an integrated approach is required that considers mechanical, electromagnetic, and thermal effects caused by electrical currents. This paper focuses on the mathematical modeling and numerical study of transverse magnetoelastic oscillations in thin current-carrying plates subjected to an alternating magnetic field. The problem is formulated considering electromagnetic interactions, geometric nonlinearity, and external alternating currents. A comprehensive system of equations is developed that includes the equations of motion, Maxwell's equations, and the heat equation with Joule heating sources. For the numerical solution, the finite difference method using the Newmark scheme and discrete orthogonalization techniques are applied. Graphs illustrating stress and strain distributions are presented, and the effects of magnetic field frequency and external current on the system’s behavior are analyzed. This research is vital for designing reliable components in micro- and nano-electronics and aviation.

Nonlinear models of viscoelastic plates and shells

Indiaminov, Ravshan — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 748-757.
Ravshan Indiaminov, Akram Narkulov, Sulton Khakberdiyev, Ruslan Butayev, Sobir Kholjigitov, Shukhrat Nematov
The dynamics of nonlinear viscoelastic plates and shells is a crucial area of study in modern mechanics, materials science, and engineering. This importance stems from the increasing demand for accurate modeling and analysis of structures subjected to complex loads, as well as the advancement of new materials and technologies. Modern materials, including carbon composites, polymers, and multilayer coatings, possess complex viscoelastic properties. Under dynamic loads, such as vibrations or impacts, viscoelastic materials exhibit time-dependent responses to these loads, necessitating careful consideration of their relaxation and creep characteristics. The unique viscoelastic properties allow these materials to adapt to applied loads, making them highly desirable for the design of sophisticated devices, such as sensors, membranes, and adaptive structures. Furthermore, interactions with external fields – such as electromagnetic or thermal forces – enhance the effects of nonlinearities and require the development of new modeling approaches. The paper presents the equations of dynamics of geometrically and physically nonlinear thin-walled elements. An operator approach based on Rabotnov’s hereditary kernels is proposed, which makes it possible to correctly account for relaxation processes. The novelty of the work lies in the consideration of the combined effect of geometric and physical nonlinearities. To demonstrate the applicability of the model, a numerical example of the deflection of a rectangular plate under uniform loading is examined. Graphs of the deflection evolution and the influence of thickness and relaxation parameters are presented.

Analysis of vibration characteristics of automobile air conditioning piping system based on CFD

Wang, Lixian — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 208-214.
Lixian Wang, Hongqiang Su, Xiaohua Lou, Sen Zhang
When air flows through pipelines, it will cause significant pressure loss, resulting in a sharp change in speed and direction, which in turn forms turbulence and generates noise. Taking the air duct pipeline of automotive air conditioning as the research object, the responses of computational fluid dynamics and aeroacoustics were studied based on the CFD method. Through comparative analysis, the characteristics of different turbulence models, discretization methods and solution algorithms and their applicable working conditions were discussed. Through the calculation of the flow field and sound field in the air conditioning duct pipeline, the causes of pressure loss and aerodynamic noise generation within the duct pipeline were explored. Through spectral analysis, it can be known that the aerodynamic noise within the duct pipeline has no obvious main frequency and belongs to broadband noise.

Inspection of helicopter blades in field applying vibration diagnostic techniques

Mironov, Aleksey — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 38-43.
Aleksey Mironov, Pavel Doronkin, Aleksejs Safonovs
The development of non-destructive testing methods for aircrafts, in particular vibration diagnostics, nowadays makes it possible to make a transition to predictive maintenance. To ensure such maintenance, the hidden faults of structures at an early stage of development to be diagnosed. Vibration diagnostic techniques are already used for helicopters and considered as promising but most helicopters do not have on-board systems. An approach that does not require specialized onboard equipment is needed. To be effective such an approach should provide diagnostics in field conditions using a one-time inspection. Application of the system’s prototype, which meet these requirements is suggested and discussed in this paper. Workability of the methods used has been demonstrated in testing of healthy and aged sets of main rotor blades. The method of blades state assessing using modal diagnostic parameters are briefly described and comparison of diagnostic parameters between healthy and aged blades are discussed.

Effect of thermally activated sparingly soluble additives on rheological and strength properties of cements for vibration-resistant transport structures

Lutfullaeva, Nargiza — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 507-514.
Nargiza Lutfullaeva, Kamola Mukhitdinova, Jaloliddin Bakhtiyorov, Bekmurodjon Rakhimjonov, Shakhida Shamuratova, Yelena Kodirova
This study investigates the influence of thermally activated sparingly soluble additives – phosphogypsum, limestone, and fly ash – on the rheological behavior and strength characteristics of Portland cement. Additives were incorporated in amounts of 1-5 % into clinkers from the Kuvasoy and Bekabad plants and evaluated for workability, water-cement ratio, and compressive strength. The results demonstrate that thermal activation (200-400 °C) enhances the surface reactivity of additives, promoting accelerated hydration of calcium silicates and improved microstructural densification. Compressive strength reached 534×105 Pa at 28 days for mixtures containing 5 % limestone activated at 200 °C. These improvements are particularly relevant for vibration-resistant transport structures – such as bridge decks, pavements, and railways – where enhanced flowability and durability are essential. The research also supports sustainable cement production through the valorization of industrial by-products like phosphogypsum and fly ash.

Die casting mold design of CH367B1 aluminum alloy throttle valve body

Wang, Minghui — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 832-838.
Minghui Wang, Chun Cao, Wanyao Chen, Xiaoxiao Guo, Ying Wang, Yinghan Cao
As a core component of the automotive engine intake system, the throttle valve body is subjected to long-term engine vibrations. Defects such as gas pores and shrinkage pores in the die-cast part will cause uneven stiffness of the throttle valve body, and thus lead to fatigue failure due to local stress concentration under vibration loads. In this paper, the aluminium alloy was used as the die-casting alloy to design an efficient and simple die-casting mould for CH367B1 aluminium alloy throttle valve body. After measuring the target dimensions and conducting a preliminary analysis of the UG 3D drawing of the part, the size and structure of the valve body were analysed according to the 3D model of the part to select the appropriate parting surface. In the design process, the clamping force, chamber capacity, projected area and other parameters were calculated in order to select a suitable die-casting machine. Part-related dimensions and features were analyzed. Push-out mechanisms, molded parts, guide mechanisms, etc. were designed. The whole set of molds was obtained. Suitable casting systems were designed by calculating and checking references. Mold flow analysis was carried out using ProCAST2021 software. The optimal solution was selected by observing the liquid metal filling process and the distribution of defects, and then calibrated.

Wind stability analysis of the rotating girder segment during construction of a rigid-frame bridge

Xu, Ding — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 223-228.
Ding Xu, Shu Pu, Jiuqun Mao
With China’s rapid infrastructure development, rotating beam bridge technology is widely used for constructing bridges over existing lines and complex terrains. As spans and structural complexity increase, wind-induced instability during rotation – especially for large-span rigid frame bridges – has become a critical concern. This study investigates the wind resistance stability of a rigid frame bridge before and during rotation. Using a static gust wind load model, bending moments, friction moments, and stability coefficients under cross-bridge and longitudinal winds are analyzed, considering dynamic friction and unbalanced weights. Results show that: (1) higher dynamic friction significantly improves stability before rotation, as friction from the spherical hinge resists wind-induced overturning; (2) during rotation, lateral wind dominates cross-bridge stability, while longitudinal stability depends on both wind and unbalanced loads; (3) counterweight adjustment and high-friction coatings effectively enhance anti-overturning capacity. The findings confirm construction safety and provide valuable references for wind-resistant design in similar rotating bridge projects.

Expansion joints and the interface zone of road pavement on bridges and overpasses

Bondar, Ivan — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 54-60.
Ivan Bondar, Seidulla Abdullayev, Gabit Bakyt, Galymzhan Ashirbayev, Laila Sagatova, Dias Seidemetov, Yerbol Duisembin
When actual intensity of transport traffic considerably exceeds the planned values, it leads to accelerated wear of road surface and formation of rutting. This problem is actual on high-speed main streets of Almaty city. Rutting in asphalt concrete pavement, especially in the areas of expansion joints, causes impacts of motor vehicles' wheels on the ends of joints (metal trims). Such loads lead to rapid failure of all expansion joints that are fixed in the roadway. It is obvious that the increase in traffic volume contributes to the increase in damage, but it is worth noting that uniform loading with a certain frequency leads to the same result, whereas impact loads occurring after the appearance and progression of damage have a much more damaging effect. To date, most efforts to reduce potholes and rutting at joints with expansion joints have focused on reducing rutting, especially in the areas adjacent to expansion joints.

Impact of basalt fiber on mechanical properties and durability of shotcrete

Zhu, Guoxue — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 549-555.
Guoxue Zhu, Zhonghua Yang, Dengzhou Li, Hanghang Wang, Lizhi Hu
Shotcrete has the problems of easy cracking and high brittleness, the incorporation of fiber can reduce the brittleness and improve the mechanical properties and durability of shotcrete. This study investigated the effect of basalt fibers (BF) lengths on mechanical properties and durability of shotcrete. The BFs were also compared with steel fibers (SF) to verify the performance advantages of BFs. The results showed that 16 mm BF had the best effect on enhancing the mechanical properties of shotcrete. The 16 mm BF shotcrete had the best frost resistance, while the 50 mm BF had poor frost resistance. The SF reinforced shotcrete exhibits inferior frost resistance compared to BF reinforced shotcrete, due to its narrower operating temperature range and higher susceptibility to corrosion.

Digital solutions for the transition to a sustainable public transport system in Tashkent

Abduvakhitov, Shakhboz R. — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 766-771.
Shakhboz R. Abduvakhitov
The purpose of this study is to analyze the prospects for transitioning the city from automobile-dominated mobility to a public transport-oriented system. The methodological framework is based on the analysis of transport infrastructure. The research is conducted on the example of Tashkent – the capital of Uzbekistan – characterized by a high level of motorization and significant commuter migration. The study concludes that a successful transition to public transport requires a phased implementation, involving infrastructure modernization, digitalization, regulation of motorization, and transformation of citizens’ mobility behavior. The novelty of this study lies in developing a digital transition model for Tashkent that integrates international best practices (Berlin, London, Singapore) with the local transport and socio-economic conditions.

Design and development of an innovative laboratory setup for the restoration of dynamic activity in spent zeolites

Makhamajanov, Makhamat-Ibrahim — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 305-310.
Makhamat-Ibrahim Makhamajanov, Zebo Alimova, Dmitriy Ayrapetov, Akhrorova Alphia
This work presents the development of an innovative laboratory installation for the regeneration of spent zeolites used in the purification of natural and wastewater from heavy metal ions and other pollutants. The technological scheme of the installation is described, enabling efficient restoration of the dynamic activity of zeolite sorbents, which ensures their multiple reuse and reduces dependence on imported synthetic sorbents. The possibility of reusing eluates obtained during regeneration as components of electrolytes for electroplating processes is considered. The technical characteristics of the installation are provided, and the application areas of regenerated zeolites are described, including gas stream purification, fuel drying, and transformer oil dehydration. The expected effect of implementation is the optimization of regeneration modes, reduction of waste, and an increase in the environmental safety of production processes.

Random parametric nonlinear vibrations of a discrete mechanical system protected from vibration

Dusmatov, Olimjon — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 44-53.
Olimjon Dusmatov, Muradjon Khodjabekov, Bakhtiyor Ashurov
In this work, the issue of checking the dynamics of nonlinear vibrations of a mechanical system protected from vibrations in case of random parametric excitations is considered. Using the Ito method, the analytical expressions of the mean square values of the absolute accelerations of the mechanical system and the dynamic absorber were determined. Statistical linearization method based on Davidenko's hypothesis was used to determine mean squared values. The average square value change of the random parametric vibration of the mechanical system protected against vibrations with the dynamic absorber at different values of the parameter describing the width of the vibration spectrum was analysed. It is shown that if the parameter describing the width of the vibration spectrum is taken smaller, the mean square value of the random parametric vibration of the protected object combined with the dynamic absorber will have a smaller vibration. At different values of the parameter of the hysteresis loop, the change of the mean square value of the random parametric vibration was analysed and appropriate conclusions were drawn.

Study of a two-stage wood chip hydrolysis process and the kinetics of monosaccharide formation

Egamberdiev, Elmurod — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 311-317.
Elmurod Egamberdiev, Samandar S. Sodiqjonov, Vays N. Juraev, Sevara J. Kholikova, Oybek Y. Aripdjanov, Nodira I. Sharipova
This article studies the sulfuric acid hydrolysis of paulownia and poplar wood chips using a two-stage approach. The research analyzes the temperature-dependent kinetics of the hydrolysis process, nothing a peak yield of reducing agents at 170 °C. An increased likelihood of reducing agent decomposition is observed as temperature rises, especially at 180 °C. Using liquid chromatography, the amounts of glucose, fructose, and arabinose in the hydrolysates were measured, with the largest glucose yield obtained at 170 °C. In addition, High-performance liquid chromatography (HPLC) and Fourier-transform infrared (FTIR) spectroscopy showed the emergence of new functional groups in the hydrolyzed wood structure. Based on mathematical modeling and experimental validation, the two-stage hydrolysis method is regarded as a good technique. This method helps raise the of hydrolysates, which are employed as raw materials in biopolymer manufacture.

The importance of using geosynthetic materials in ensuring anti-erosion stability of railway embankments

Lesov, Kuvandik — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 318-324.
Kuvandik Lesov, Akmal Uralov, Mukhamedali Kenjaliyev, Ulugbek Ergashev, Feng Huaiping
Railway embankments are key elements of transport infrastructure whose stability depends on soil, hydrogeological, and climatic factors. Wind and rainfall erosion threaten slope integrity, causing soil loss and potential landslides. This study integrates field experiments and modeling to assess erosion mechanisms and the effectiveness of geosynthetic geomats for slope protection. Tests on the Bukhara-Miskin railway section determined wind and rainfall thresholds for soil displacement and evaluated geomat performance by slope stability, vegetation density, and runoff resistance. Reinforced slopes showed almost no soil washout, with vegetation density of 4000-5500 kg/ha – over 200 % higher than traditional seeding. Geomat use reduced erosion by up to 80 % and improved ecological resilience, offering a reliable, cost-effective, and sustainable solution for long-term railway slope stability.

Modeling and predicting the thermal state of a transformer through an adaptive intelligent approach

Mukhаmmаdjоnоv, Mukhаmmаdyusuf — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 626-633.
Mukhаmmаdyusuf Mukhаmmаdjоnоv, Yusupov Dilmurod, Odiljon Kutbidinov, Khamdamov Saidmurodjon, Anvar Norboev, Otabek Babaev, Nilufar Khalilova, Abduraxim Khabibullayev
The thermal condition of power transformers is a critical factor influencing insulation aging and overall operational reliability, especially under varying load and environmental conditions. Accurate forecasting of transformer temperature enables preventive maintenance and supports the development of intelligent monitoring systems within smart grid environments. In this study, an Adaptive Neuro-Fuzzy Inference System (ANFIS) model is developed to predict transformer temperature based on ambient temperature and load factor. The proposed ANFIS model is trained and validated using experimental field data and its performance is benchmarked against a classical linear regression model. The comparative evaluation demonstrates that the ANFIS model provides superior accuracy, achieving RMSE = 0.89 °C, MAE = 0.75 °C, and R2= 0.987, whereas the regression model yields RMSE = 1.95 °C, MAE = 1.63 °C, and R2= 0.871. These results indicate that ANFIS effectively captures nonlinear thermal dynamics that cannot be represented by linear approximation methods. The study highlights the suitability of the proposed approach for real-time transformer thermal monitoring and its potential integration into smart grid-based predictive maintenance and asset health management frameworks.

Fatigue performance analysis and reinforcement measures for foundation connection components of wind turbine towers

Xie, Yiming — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 332-338.
Yiming Xie, Yinfeng Dong, Yiping Wang, Yilin Wang, Feipeng Liu, Hongxing Li
In recent years, frequent tower collapses have been mostly related to fatigue damage. Therefore, this paper systematically studies the fatigue resistance performance and reinforcement methods of tower foundation connection components through on-site tests and finite element analysis. The test analyzed the lifespan, stress-strain characteristics, crack development and mechanical properties of the connection components under fatigue loads; numerical simulation compared the fatigue life and safety of ordinary components, reinforced with steel mesh, C100 high-strength concrete components, and C40 and C100 composite components, etc., providing key basis for engineering reinforcement.

Planar dynamic modeling of a rotor-bearing-housing system with polyurethane support layer

Makhmudova, Shakhnoza — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 1-7.
Shakhnoza Makhmudova, Nodirjon Tursunov, Gulnaza Avazova
This study examines a planar dynamic model of a rotor-bearing-housing system incorporating a polyurethane support insert. The formulation takes into account the inertial, stiffness, and damping properties of the shaft, raceways, rolling elements, and cage, while the polyurethane layer is treated as an additional elastic–dissipative element. The equations of motion are derived using the Lagrangian formalism, based on kinetic, potential, and dissipation energies. Within the article, a frequency response analysis for different coating thicknesses is carried out, showing that the polyurethane insert reduces resonance frequencies by approximately 50-64 % while increasing vibration amplitudes by 67-146 %. A 2 mm layer provides a compromise between stiffness and damping, whereas thicker coatings (3-4 mm) enhance high-frequency vibration isolation but lead to higher sensitivity to low-frequency excitations. The novelty of this study lies in the introduction of a polyurethane elastic-dissipative layer into the planar dynamic model of the rotor-bearing-housing system. This approach enables an analytical representation of the polymer’s stiffness and damping effects and establishes a direct relationship between the polyurethane thickness and the system’s resonance behavior a topic not explicitly treated in previous works.

Reinforcement of the embankment with reinforced concrete piles in the transition zone from the railway embankment to the bridge

Abdujabarov, Abdukhamit — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 133-141.
Abdukhamit Abdujabarov, Mashkhurbek Mekhmonov, Maqsudjon Khamidov, Mavjuda Mirkhanova, Auyezmurat Yembergenov
The article presents the design of the transition section to be used in different conditions in the region of junction of roadbed and the bridge, establishment and reasons of vertical shifts under the action of vibro-dynamic forces which appear when trains are driven along transition section. Likewise, in the sections of the foundation of the roadbed and the bridge, the types and types of a variety of defects caused by this fact, such as when the pressure of the weight of constant and temporary forces dropped on the rolling stock passes the active pressure of the ground (Ea), which acts on the support of the bridge shore at the point of the passage, are provided. In order to minimize the active effort at the junction formed by soil, reinforce and make the junction location defect-free, reinforced concrete piles are driven into the embankment to act as bases of junction location between the roadbed of the railway and the bridge location and a formula of computing the spacing of the piles has been contributed taking into consideration outer influences.

Improving the technical and economic performance of diesel engines for shunting locomotives

Kulmanov, Bahodir — 2025-12-22T00:00:00Z

Vibroengineering Procedia, Vol. 60, 2025, p. 339-344.
Bahodir Kulmanov, Vladimir Grachev, Otabek Ergashev, Shohijakhon Kudratov
An experimental verification of the effectiveness of applying a compromise fuel injection advance angle (FIAA) was conducted on a test stand for a PD1M type diesel generator unit. The study included an analysis of injection pressure changes at various FIAA values, as well as tests of the installation with the ESUVT.01 electronic fuel injection control system under load. Additionally, modeling of the diesel engine’s working process was performed using the “Diesel-RK” software package, followed by processing of the obtained data. Comparison of test results in locomotive characteristic modes at fuel injection advance angles of 14° and 29° crankshaft rotation showed that using a compromise FIAA value ensures a reduction in the locomotive’s average operational fuel consumption by 7-10 %, depending on operating conditions. Furthermore, decreasing the advance angle positively affects the reduction of maximum cylinder pressure and exhaust gas temperature, indicating an increase in the overall effectiveness of this approach.