Engineering Articles

Timber-to-timber composite floors connection optimization for vibration and deflection reduction
Editor's pick
Research Article
Timber-to-timber composite floors connection optimization for vibration and deflection reduction
By Yuri De Santis, Francesca Pancella, Dag Pasquale Pasca, Angelo Aloisio, Massimo Fragiacomo
Timber floors are prone to vibration due to the reduced modulus of elasticity of the material. Composite floors represent the most convenient solution to achieve acceptable performances and at the same time to save material and cost. In determining the natural frequency of a composite floor, the stiffness of the connection between the joined structural member is crucial. Inclined screws connections are characterized by the highest slip modulus among the mechanical fastener connections. However, the determination of the optimal inclination angle of the screws for vibration and deflection reduction remains an unexplored issue. The optimization problem is faced by means of an analytical model of beam on foundation.
November 27, 2023
Vibration Engineering
Most cited
Research Article
A conversion guide: solar irradiance and lux illuminance
By Peter R. Michael, Danvers E. Johnston, Wilfrido Moreno
December 4, 2020
Applied Physics
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
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
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

Journal of Vibroengineering

A review on wind turbines gearbox fault diagnosis methods
Research Article
A review on wind turbines gearbox fault diagnosis methods
As an renewable and clean energy of the world, wind energy has gained more and more attention and its fault diagnosis becomes more and more important. The gearbox, as the kernel component of the wind turbine system, it’s robust conditions have a great influence on the whole wind turbines system. Wind turbine gearbox has complex structure, which is usually composed of solar planetary gearbox and cylindrical gearbox. In the process of operation, various kinds of faults easily occur, resulting in serious losses. Once the wind turbine gearbox is not functioning as smoothly as it could be, it may result in large economic losses for the company and owner. At the same time, the failure rate of wind turbine gearbox has always been high because of complicated mechanic structure and special motion. Therefore, the tasks of reducing the downtime and increasing the productivity of wind turbine gearbox are urgent. This paper reviewed some research results of faults diagnosis on wind turbines gearbox, such as time-frequency analysis method, vibration based methods, nondestructive testing methods, etc. Meanwhile, this paper finds out some key problems and the channel of the resolution of the issue in order to supply some information for the further research of wind turbines gearbox.
January 27, 2021
Applied Mathematics
Investigation of dynamic properties of the microturbine with a maximum rotational speed of 120 krpm – predictions and experimental tests
Research Article
Investigation of dynamic properties of the microturbine with a maximum rotational speed of 120 krpm – predictions and experimental tests
Advances in the development of analysis and design methods for fluid-flow machines have enabled both their multi-criteria optimisation and miniaturisation. To decrease the size of such a machine whilst, at the same time, maintaining its output power level, the rotor’s rotational speed needs to be increased. It is the reason for serious difficulties with respect to the rotor dynamics and the selection of a bearing system. This article discusses the simulation analysis and experimental research carried out on a prototypical microturbine, designed for use in a domestic ORC (organic Rankine cycle) cogeneration system. During the design process, the basic assumption was to develop a turbomachine, whose dimensions would have been as small as possible and whose output electric power would have been about 1 kilowatt. A supersonic impulse turbine, with a nominal rotational speed of 100,000 rpm, was used in order to obtain high flow efficiency. The maximum speed of the rotor was determined at a level of 120,000 rpm. The article presents the results of analyses made at the design stage and preliminary results of the experimental research. The numerical simulations covered the bearing system optimisation and the rotor dynamics analysis. Next, based on the outcomes of these analyses, a decision was made to use non-conventional gas bearings which are fed by the low-boiling medium’s vapour that comes from the ORC system. Within the framework of the experimental research, the dynamic behaviour of the turbogenerator was examined in terms of the rotational speed and produced energy. The performed measurements are proof of very good dynamic properties of the tested machine and after the research was over it was concluded that there were absolutely no signs of wear of the turbogenerator’s subassemblies.
March 31, 2020
Vibration Engineering
Combustion monitoring in engines using accelerometer signals
Research Article
Combustion monitoring in engines using accelerometer signals
Recent regulations for emission control from combustion engines have led to focus on various methods to monitor control and the combustion process. The presented work explores the potential relationship between various combustion events monitored using in-cylinder pressure transducer and the resulting block vibration measured using accelerometers. Various features of combustion development process were derived from the vibration data acquired. The methodology was analyzed using a single cylinder diesel engine. The heat release data was able to detect and extracted various indicators of the combustion process like start of combustion and half of injected fuel positions. Higher correlation was observed for the data computed using heat release curve obtained from the in-cylinder pressure measurements and those obtained using the accelerometer signals. The proposed methodology can be used to optimize the fuel injection timing in order to reduce emissions from engines to comply with various regulations. The practical importance of presented work demonstrates use of monitoring of block vibration signals as a mean of non-intrusive methods of diagnosis of engine for its effective condition monitoring.
September 30, 2019
Vibration Engineering
Ground vibration propagation and attenuation of vibrating compaction
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
Journal of Vibroengineering

Comprehensive platform for advancements in the field of vibration engineering

Impact Factor
1.0
CiteScore
1.5
APC
1050 EUR

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Modal finite element analysis of PCBs and the role of material anisotropy
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
Design and calculation of double arm suspension of a car
Most downloaded
Research Article
Design and calculation of double arm suspension of a car
By David Jebaraj B, Sharath Prasanna R
Suspension system is one of the challenging portions in designing a vehicle. The complete stability of the vehicle under dynamic conditions depends on the suspension system of the vehicle. Suspension system of a vehicle is interlinked with other systems such as steering, Wheels and Brakes. The main objective of this document is to provide complete guidance in designing and calculation of an independent suspension system with double control arms. The required parameters are calculated on considering a prototype vehicle with gross weight of 350 kg such as required stiffness of shock absorbers, Ride frequency, Motion ratio, Coefficient of damping etc. A CADD model was made with CATIA v5 r20 and SOLIDWORKS on the basis of calculations obtained and stress analysis was carried out for this model in various software such as Ansys. The complete assembled model was tested in LOTUS Shark and the result was obtained.
June 30, 2020
Industrial Engineering
Development of an underwater robotic arm using multibody dynamics approach
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.
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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.
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Engineering Articles

Welcome to Extrica, where engineering articles come alive to help you understand the intricate details of making things work better. We'll share ways that experts are using natural science, mathematics, and the engineering design process to solve technical problems, boost efficiency, and create better systems. From engineering articles for high school students to in-depth research studies for your scholarly endeavors.

Understanding Engineering Basics

Before filtering our immense library for a specific article on engineering, you must understand the basics. Indeed, engineering is a broad field. It covers the use of scientific principles with the aim of developing systems, structures, tools, and processes to solve problems. The few main branches of engineering include:

  • Civil Engineering
  • Mechanical Engineering
  • Electrical Engineering
  • Chemical Engineering
  • Computer Engineering
  • Aerospace Engineering
  • Biomedical Engineering

And what do engineers do exactly? Well, they go through a specific process. First, they identify a problem that needs solving. After that, they research existing solutions and brainstorm new ones. Then, they come up with a plan and specificities of a chosen solution, build a prototype, and test it out. As a fix isn't perfect at its first iteration, an engineer makes improvements and repeats the design and evaluation process as necessary.

There are many tools that aid the engineering process, from computer-aided design and simulation software and programming languages to lab equipment. While coming up with solutions, engineers must consider the ethical implications and safety of their work. And as the engineering field is changing as we speak, there's no denying that continuous learning is a necessity.

How Engineering Affects Everyday Life

Engineering has a profound impact on virtually every aspect of everyday life. Here are some ways in which engineering influences and improves our daily experiences:

  • Infrastructure: Engineers design roads, bridges, tunnels, and public transit systems, facilitating the movement of people and goods. They also create safe and functional structures for living, working, and recreation.
  • Communication: Electrical and communication engineers develop technologies like smartphones, the internet, and wireless networks that connect people globally. Computer engineers contribute to the development of software, hardware, and systems that power our computers and devices.
  • Healthcare: Biomedical engineers design and improve medical devices, such as MRI machines, pacemakers, and prosthetics. Chemical engineers play a role in the development and manufacturing of pharmaceuticals.
  • Energy: Electrical and mechanical engineers contribute to the design of power plants, renewable energy systems, and electrical grids. They work on creating energy-efficient appliances, buildings, and transportation, contributing to sustainability.
  • Environment: Engineers develop solutions for waste management, pollution control, and sustainable resource use.
  • Consumer Products: Mechanical engineers design a wide range of consumer products, from everyday appliances to automobiles, while developing new materials that perform better.
  • Manufacturing: Industrial engineers contribute to the automation of manufacturing processes, improving safety, efficiency, and quality.

These are but a few examples of how engineering shapes the way we live. As you delve into our articles on engineering education, whether on vibroengineering, mechatronics, or artificial intelligence, let Extrica help you make a lasting impact on society.

What to Expect in This Section

When perusing our engineering articles, you can expect a rich and diverse repository of information covering a broad spectrum of engineering disciplines. These articles cater to a broad audience, from seasoned professionals in the field to students and enthusiasts eager to stay abreast of the latest developments.

Extrica is a platform that hosts not only general engineering articles but also scholarly articles on engineering. These educational articles are rigorous in their approach, presenting in-depth research studies, experiments, and analyses conducted by experts in the respective engineering domains. Readers can expect a high level of academic integrity and reliability from these pieces, making them valuable resources for those seeking authoritative information and a deeper understanding of specialized topics within engineering.

One distinctive feature of Extrica is its commitment to open access journals, ensuring that a significant portion of its content is freely accessible to the public. This accessibility promotes the democratization of knowledge, allowing engineers, researchers, and enthusiasts from diverse backgrounds to benefit from the latest advancements and breakthroughs without financial barriers. The platform's dedication to open access enhances the dissemination of valuable information, fostering collaboration and innovation within the engineering community.

Moreover, Extrica is not limited to scholarly articles alone. It also encompasses dynamic engineering news articles, providing readers with timely updates on industry trends, technological breakthroughs, and noteworthy events. These news articles offer a bridge between cutting-edge research and real-world applications, making engineering knowledge not only academically enriching but also relevant and applicable in the rapidly evolving landscape of technology.

In summary, exploring each engineering article on Extrica promises a multifaceted experience, encompassing a wealth of information ranging from scholarly insights to real-world applications. Whether one seeks to deepen their understanding of specific engineering concepts or stay informed about the latest industry trends, Extrica emerges as a comprehensive platform that caters to the diverse needs and interests of the engineering community and beyond. In other words, what is an engineering article if you can't find it on Extrica?

Finding Top Engineering Reads

With Extrica, building your engineering knowledge has never been easier. Whether you're seeking engineering articles for students or trying to stay informed about the latest industry trends, this section is a treasure trove. Our powerful filtering mechanism ensures you'll always find what you need.

About Our Engineering Article Authors

The engineering articles on Extrica are a result of a diverse and accomplished group of professionals, academics, and researchers from various corners of the engineering landscape. These individuals contribute their expertise and insights to create a rich tapestry of content that spans the breadth of engineering disciplines.

Many of the authors are seasoned professionals with extensive industry experience, bringing practical knowledge and real-world perspectives to their articles. Their work often reflects a deep understanding of the challenges and innovations within their respective fields, providing readers with valuable insights that bridge the gap between theory and application.

In addition to industry experts, Extrica is proud to host articles from renowned academic scholars. These individuals are actively engaged in cutting-edge research, contributing to the advancement of engineering knowledge. Their scholarly articles not only showcase the latest developments in the field but also adhere to rigorous research methodologies, ensuring a high standard of academic excellence.