Vibration Engineering
Editor's pick
Research Article
Use of fragility curves to assess the seismic vulnerability of soft rock tunnels: a review
By Joel Sam
Due to their distinct geotechnical and structural features, soft rock tunnels pose serious issues because of their seismic sensitivity. These tunnels, often constructed in formations with lower shear strength and higher deformability, are particularly susceptible to damage during earthquakes. Fragility curves, which graphically represent the probability that a structure may sustain damage up to or beyond a particular threshold as a function of seismic intensity, are essential tools for evaluating the seismic resilience of these infrastructures. This research looks closely at the use of fragility curves to assess the seismic vulnerability of soft rock tunnels. Exploring the fundamental concepts and methodologies involved in constructing fragility curves, including seismic hazard analysis, structural modeling, damage state definition, data collection and statistical analysis is looked at first. The review highlighted the integration of soft rock characteristics such as strength and deformation properties into the fragility assessment process. Key developments in the topic are covered such as how machine learning and Bayesian inference might improve the precision and usefulness of fragility curves. The paper identified key findings such as the high sensitivity of fragility curves to geotechnical properties and seismic intensity levels and emphasized the importance of accurate data collection and model calibration. Important gaps in seismic risk evaluations are filled by integrating cutting-edge methodologies, such as Bayesian inference and real-time machine learning models that clarify the seismic behaviour of soft rock tunnels in the real world. For the purpose of strengthening earthquake-resistant infrastructure in earthquake-prone areas, engineers, scholars and policymakers are given practical insights.
February 14, 2025
Vibration Engineering
Most cited
Research Article
Fault diagnosis and health management of bearings in rotating equipment based on vibration analysis – a review
By Adnan Althubaiti, Faris Elasha, Joao Amaral Teixeira
November 26, 2021
Applied Mathematics
Most cited
Research Article
A convolutional neural network method based on Adam optimizer with power-exponential learning rate for bearing fault diagnosis
By Youming Wang, Zhao Xiao, Gongqing Cao
June 30, 2022
Applied Mathematics
Most cited
Research Article
A review on wind turbines gearbox fault diagnosis methods
By H. Gu, W. Y. Liu, Q. W. Gao, Y. Zhang
January 27, 2021
Applied Mathematics
Most cited
Research Article
Applying deep learning and wavelet transform for predicting the vibration behavior in variable thickness skew composite plates with intermediate elastic support
By Wael A. Altabey
February 6, 2021
Vibration Engineering
Journal of Vibroengineering
Research Article
Ground vibration propagation and attenuation of vibrating compaction
When a high-power vibrating roller compact the subgrade, the vibration wave will quickly propagate along the surface of the subgrade and generate hazards to surrounding environment and structure. To study the vibration propagation rules of the roller, the vibration acceleration of the high-power vibrating roller was measured on the surface of the rock subgrade, coarse-grained soil subgrade and fine-grained soil subgrade. The respective relations between vibration acceleration and the distance from a vibration source in the vertical, horizontal radial and horizontal circumferential direction have been discovered. The research results show that the vibration peak frequency generated by the vibrating roller on the subgrade approximates vibration frequency. The vibration effective influence distance varies from 10m to14m, and the horizontal radial vibration is greater than that of vertical and horizontal circumferential direction. The vibration of the rock subgrade attenuates the most slowly and propagates the most remotely.
August 15, 2019
Vibration Engineering
Research Article
Bearing fault diagnosis based on improved VMD and DCNN
Vibration signal produced by rolling element bearings has obvious non-stationary and nonlinear characteristics, and it’s necessary to preprocess the original signals to obtain better diagnostic results. This paper proposes an improved variational mode decomposition (IVMD) and deep convolutional neural network (DCNN) method to realize the intelligent fault diagnosis of rolling element bearings. Firstly, to solve the problem that the number of decomposed modes of variational mode decomposition (VMD) needs to be preset, an IVMD method is proposed, where the mode number can be determined adaptively according to the curve of the instantaneous frequency mean of mode functions. With this method, the vibration signal can be decomposed into a series of modal components containing bearing fault characteristic information. Then, DCNN is employed to fuse these multi-scale modal components, which can automatically learn fault features and establish bearing fault diagnosis model to realize intelligent fault diagnosis eventually. Experimental analysis and comparison results verify that the proposed method can effectively enhance the bearing fault features and improve the diagnosis accuracy.
August 15, 2020
Applied Mathematics
Research Article
Vibration monitoring of CNC machinery using MEMS sensors
Industry 4.0 relies on the adoption of digital technologies to gather data in real time and to analyse it, providing useful information to the manufacturing system. In this paper, what solutions modern production plants that are aspiring towards compliance with philosophy of the Industry 4.0 have to adopt, monitor and analyse the vibration data of the manufacturing systems using existing process and tool monitoring solutions. In addition, detailed explanation of vibration level reading in order to increase the protection of the production sources (machines, devices etc.) against human errors and malfunctions in terms of Total Quality Management (TQM) and Total Productive Maintenance (TPM) with the concept’s levels TPM1(operator level) and TPM2(periodic conditional reviews etc.) will be giving with a Montronix system’s integration on a CNC milling machine. Besides, optimization and monitoring function of production process will be demonstrated with related graphs and tables with values of different scenarios.
May 15, 2020
Vibration Engineering
Research Article
Ride comfort performance of hydro pneumatic isolation for soil compactors cab in low frequency region
The hydro pneumatic isolation (HPI) of the cab combined by the high static stiffness and nonlinear viscous damping of the pneumatic isolation; and nonlinear adjustable damping of the hydraulic isolation are proposed. Based on the simulation and experimental studies, a nonlinear dynamic model of the soil compactor interacting with the deformable terrains is built to analyze the low frequency ride comfort of the HPI. The HPI’s performance for improving the ride comfort and health of the driver is evaluated via both the power-spectral-density and root-mean-square of acceleration responses of the driver’s seat heave, pitching and rolling cab angles. The research results show that the HPI’s characteristics with high static stiffness and nonlinear damping have an obvious impact on reducing low frequency vibration and controlling the cab shake of the vehicle in comparison with the traditional rubber mounts.
August 15, 2020
Vibration Engineering
Journal of Vibroengineering
Comprehensive platform for advancements in the field of vibration engineering
Impact Factor
1.0
CiteScore
1.7
APC
1050 EUR
Best of Theme
Most cited
Research article
May 15, 2020
Analysis of vibroexciters working process of the improved efficiency for ice breaking, construction and road machines
By Alina Kim, Mikhail Doudkin, Alexandr Ermilov, Gennadiy Kustarev, Murat Sakimov, Marek Mlynczak
Most cited
Research article
September 30, 2019
Fault diagnosis method for energy storage mechanism of high voltage circuit breaker based on CNN characteristic matrix constructed by sound-vibration signal
By Shutao Zhao, Erxu Wang, Jiawei Hao
Most cited
Research article
April 21, 2022
Mathematical model and motion analysis of a wheeled vibro-impact locomotion system
By Vitaliy Korendiy, Volodymyr Gursky, Oleksandr Kachur, Petro Dmyterko, Oleh Kotsiumbas, Oleksandr Havrylchenko
Most cited
Research article
June 26, 2022
Recent advancements of signal processing and artificial intelligence in the fault detection of rolling element bearings: a review
By A. Anwarsha, T. Narendiranath Babu
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Most downloaded
Research Article
Modal finite element analysis of PCBs and the role of material anisotropy
By Uday H. Kalyani, Mark Wylie
Printed Circuit Boards (PCBs) are epoxy resin-impregnated and cured sheets of counter woven glass fabric (e.g. FR4) laminated between thin sheets of Copper. The nature of the PCB is inherently anisotropic and inhomogeneous but previous modal FEMs of PCBs have assumed isotropic, anisotropic (transversely isotropic and orthotropic) material properties and shown good correlation with test data for specific scenarios [1-3]. This paper details part of a research program aimed at gaining a better understanding of accurately modeling PCB’s dynamic behavior. New investigations into the impact of material anisotropy and, in particular, the effect of material orthogonal plane definition (Ex and Ey) on eigenfrequencies is analysed. A modal FEM of a JEDEC PCB is created, verified, and validated using well established theories by Steinberg and empirical data by others [4, 5]. The relative contributions of Ex, Ey and Ez on PCB eigenfrequencies is examined using a parametric modal FEM, analysing the role of material isotropy verses anisotropy. The impact of transversely isotropic material properties is also analysed for a typical JEDEC PCB. This analysis details the mesh density required for accurately modeling the PCB eigenfrequencies. The results show that a 100 % increase in Ez has only a 0.2 % difference in the eigenfrequency where as a 100 % increase in Ey has a 1.2 % difference in the eigenfrequency. The effect of orthotropic plane definition (alternating Ex with Ey) on the JEDEC PCB amount to a 7.95 % delta in eigenfrequency.
June 29, 2020
Vibration Engineering
Most downloaded
Research Article
Development of an underwater robotic arm using multibody dynamics approach
By S. Fernando, M. Perera
Underwater robotic arms are important devices that enables workers to carry out tasks remotely from a safe distance reducing or eliminating the risks that are involved with the task. The primary objective of the robotic manipulator is to perform maintenance and cleaning activities of the hull of a ship. However, the control of these devices underwater is quite complicated due to the numerous factors that make these systems unstable and non-linear. The aim of this study is to develop a multibody dynamic robotic manipulator model, integrated with a control strategy to optimize and obtain stable kinematics solutions. The hydrodynamic forces are integrated to the manipulator model considering buoyancy forces and surface drag forces. A basic algorithm is used to generate the joint angles using 7 geometrical parameters. The control of the manipulator was done to simply follow any path that represents the given coordinates. The P, I and D parameters are tuned individually to optimize the kinematic solution of the manipulator. 3-DOF articulated manipulator is the commonly used manipulator configuration. However, a 6-DOF manipulator configuration was selected in this study to allow for change in orientation using wrist motions.
February 5, 2022
Vibration Engineering
Numerical simulation of hydraulic fracturing in transversely isotropic rock masses based on PFC-2D
In order to make a better understanding of the hydraulic fracturing in transversely isotropic rock masses, the modified particle flow modeling method was used by embedding the smooth joint models within an area of certain thickness, and the optimized fluid-mechanical coupling mechanism was applied in hydraulic fracturing modeling. On this basis, the influence of the injection rates, in-situ stress ratios and inclination angles of the bedding planes on the breakdown pressure and propagation of the hydraulic fractures was analyzed. The simulation indicated that: 1) Excessive small or large injection rates would lead to the increase of the breakdown pressure of the hydraulic fractures. 2) Under different inclination angles of the bedding planes, the crack breakdown pressure increased linearly with the increasing of the in-situ stress ratios. And under conditions of different in-situ stress ratios, the crack breakdown pressure changed as a ‘wave’ type with the increasing inclination angles of bedding planes. 3) Both the in-situ stress ratios and the inclination angle of bedding planes affected the propagation of the hydraulic fractures. The existence of the bedding planes would induce the hydraulic fractures to propagate along the bedding planes. The large inclinations of the bedding planes would cause the hydraulic fractures to keep propagating with the direction of maximum principal stress.
Dynamical processes in a multi-motor gear drive of heavy slabbing mill
A real case study is represented of abrupt failures in a new multi-motor gear drive of vertical rolls in the heavy slabbing mill. Modal analysis is conducted, and the lowest torsional vibration modes are verified by the data from an industrial plant. Conditions of parametric resonances due to variable stiffness of teeth are determined within the range of working speed. The branched gear drive is investigated by the non-linear dynamical model with backlashes. It is shown that instantaneous dynamic loads in driveline are strongly dependent on the difference in gap sizes and phase shift between two intermediate gears in the output gear wheel coupling. Deviation in electrical parameters by 0.5 % is considered as the additional cause of not equal load sharing of parallel motors. Results of this research allowed preventing further failures of the gearbox and optimizing slabbing mill control. The proposed approach can be used in other multi-motor machines.
Welcome to Extrica's hub for Vibration Engineering
A leading source for open access journals in the science and engineering realms. Here, you'll find comprehensive coverage of all things related to vibration engineering. Whatever your research or interest in vibration engineering, we provide extensive resources to support your exploration.
Understanding Vibration Engineering
Dive into the world of vibration engineering with an introduction to its core concepts. This field delves into the study of mechanical vibrations and their impact on various structures. Vibration in mechanical engineering is about understanding the oscillatory motions of mechanical systems from their equilibrium positions. Key principles in this area include free and forced vibrations, harmonic motion, damping, natural frequency, and resonance.
Practical Applications in Vibration Engineering
Vibration analysis is crucial across various industries. Applications range from structural health monitoring and aerospace engineering to machinery health, power generation, seismology, consumer electronics, medical imaging, entertainment, and earthquake engineering. These real-world uses underscore the field's significance.
Innovations in Vibration Mitigation
Discover the latest technological breakthroughs in vibration mitigation, enhancing the performance and longevity of various systems. Innovations aim at noise reduction, precision improvement, and increased comfort and safety. The field has evolved through passive and active vibration mitigation techniques, marking significant progress in vibration engineering.
Case Studies in Vibration Engineering
Learn from real-world scenarios where vibration engineering principles have been applied to resolve challenges. For instance, a case study at a hydroelectric dam highlights how addressing vibration issues, due to Rheingans influence, led to redesigning turbine blades, thereby solving the resonance problem.
Your Vibration Engineering Resource
With a solid understanding of vibration engineering's principles and advancements, professionals in this field can make significant contributions across various sectors. Staying updated with the latest developments is key to innovating and ensuring safety in vibration-related projects. Extrica provides the knowledge and tools necessary for tackling vibration challenges effectively.
