Engineering Articles
Editor's pick
Research Article
Study on dynamic characteristics and wind-vibration control of transmission tower considering local damage and destruction
By Chen Chen, Liang Zhang, Kai Niu, Mengqi Zhai, Fengkai Han, Kunjie Rong, Li Tian
As existing transmission lines gradually approach their service life, health monitoring studies of in-service transmission towers are becoming increasingly important. In this study, relying on the 110 kV transmission line project of Neihuang Dichu to Er’an in Anyang, Henan Province, China, a refined finite element model of the transmission tower structure was established, and the accuracy of the numerical model was validated based on the health monitoring data of the actual engineering structure. Damage and destruction analyses of transmission tower structures considering vibration modes and frequencies were carried out, and the influence of local damage on the vibration reduction effectiveness of controlled structures under wind loads was discussed and analyzed. The results showed that the vibration mode of the local damage model was shifted along the damaged part, and its frequency changed within 15 %; in contrast, the dynamic characteristics of the local damage model changed more significantly. With the vibration mode as the judgment basis of the structural state, the obvious difference can be observed when the structure undergoes local damage, and the vibration mode should be used as the basis for determining the specific damage site of the transmission tower in the actual project. The adopted TMD can effectively reduce the dynamic response of the transmission tower under different wind attack angles and wind speeds, and its vibration reduction effectiveness performed the worst due to the significant change in the dynamic characteristics of the tower leg damage model, resulting in the detuning of the TMD.
September 8, 2024
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
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
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
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
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
Fault diagnosis method for energy storage mechanism of high voltage circuit breaker based on CNN characteristic matrix constructed by sound-vibration signal
Aiming at the problem that some traditional high voltage circuit breaker fault diagnosis methods were over-dependent on subjective experience, the accuracy was not very high and the generalization ability was poor, a fault diagnosis method for energy storage mechanism of high voltage circuit breaker, which based on Convolutional Neural Network (CNN) characteristic matrix constructed by sound-vibration signal ,was proposed. In this paper, firstly, the morphological filtering was used for background noise cancellation of sound signal, and the time scale alignment method based on kurtosis and envelope similarity were proposed to ensure the synchronism of the sound-vibration signal. Secondly, the Pearson correlation coefficient was used to construct two-dimensional image characteristic matrix for the expanded sound-vibration signal. Finally, the characteristic matrix was trained by utilizing CNN. Local Response Normalization (LRN) and core function decorrelation were utilized to improve the structure of CNN model, which reduced the bad impact of large data fluctuation of energy storage process on the diagnostic accuracy of circuit breaker energy storage mechanism. Compared with the traditional method, the proposed method has obvious advantages, whose total accurate rate up to 98.2 % and generalization performance is excellent.
September 30, 2019
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
Journal of Vibroengineering
Comprehensive platform for advancements in the field of vibration engineering
Impact Factor
1.0
CiteScore
1.7
APC
1200 EUR
Best of Theme
Most cited
Research article
September 26, 2019
A portable breast cancer detection system based on smartphone with infrared camera
By Jian Ma, Pengchao Shang, Chen Lu, Safa Meraghni, Khaled Benaggoune, Juan Zuluaga, Noureddine Zerhouni, Christine Devalland, Zeina Al Masry
Most cited
Research article
March 31, 2019
Optimization of palm methyl ester and its effect on fatty acid compositions and cetane number
By Sharath Satya, Aditya Kolakoti, Naga Raju B., Shyam Sundar R., Ranga Rao
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
August 15, 2020
Bearing fault diagnosis based on improved VMD and DCNN
By Ran Wang, Lei Xu, Fengkai Liu
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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
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
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.
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.
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.
