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Journal articles on the topic 'Vibration indicators'

Author: Grafiati

Published: 6 July 2024

Last updated: 31 July 2025

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1

Spirin, Anatoly, Dmytro Borysiuk, Oleksandr Tsurkan, and Igor Tverdokhlib. "NFLUENCE OF VIBRATION ON THE ERGONOMIC INDICATORS OF THE PRODUCTION PROCESS." Vibrations in engineering and technology, no. 1 (108) (May 1, 2023): 45–56. http://dx.doi.org/10.37128/2306-8744-2023-1-5.

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Features of the impact of industrial vibration, the nature, depth and direction of physiological changes of various body systems depend on the level, frequency composition of vibrations and physiological properties of the human body. Vibration is one of the main causes of occupational diseases. The study of the sources of production vibration, the ways of its propagation, the specifics of the impact on the human body and protection against harmful effects is currently an urgent issue. The analysis of the latest sources shows that the majority of works consider individual elements of a complex

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Ryazancev, V., M. Gerasimov, and Y. Brazhnik. "REDUCTION OF DIFFERENTLY DIRECTIONAL VIBRATIONS TO ASYMMETRICAL BY CHANGING THE RATIO OF VALUES COMPOSING THE DRIVING FORCE." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 6, no. 5 (2021): 87–94. http://dx.doi.org/10.34031/2071-7318-2021-6-5-87-94.

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Vibrating machines play a primary role in the implementation of programs in the construction and road construction kit. The improvement of vibration machines allows to significantly increase the speed of construction and road construction work. The main working unit of a vibrating machine is a vibrating device or vibrator. Currently, in the industry, vibration devices are used with circular or directional, along a certain straight line of vibrations. Further improvement of vibrating machines is carried out in the direction of creating vibration devices with asymmetric vibrations. At present, t

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Bespalov, A. L., and I. G. Svidrak. "Universalization of the elastic system of vibration feeders with vertical electromagnetic vibration drive." Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 24, no. 97 (2022): 41–45. http://dx.doi.org/10.32718/nvlvet-f9707.

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Vibrating feed bins with electromagnetic drive are widely used in the automation of production processes in mechanical engineering and instrument engineering. They are used for feeding miniature, small, or medium-sized parts to automated production equipment. This equipment is used in automatic lines, automated complexes, or any other flexible automated production facilities. These devices are most widely used for loading parts to assembly positions in automated assembly complexes. In this case, the parts fed to these positions must be located in a certain stable position. Various orientation

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JAGLA, Jan, Gwénaëlle HAESE, Pierre ROPARS, et al. "Annoyance assessment of the combined effect of railway noise and vibration including physiological measurements." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 270, no. 3 (2024): 8650–61. http://dx.doi.org/10.3397/in_2024_4128.

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The prediction of annoyance due to railway transportation in residential areas is crucial to correctly dimension noise and vibration reduction solutions. In situ annoyance assessment for multiple exposition scenarios requires to convince many residents to take annoyance tests combined with noise and vibration measurements inside their homes. Such approach is not adapted to large-scale experiments. Therefore, the VibAcouPhysio project aims at studying annoyance due to railway noise and vibration in laboratory conditions. A vibrating platform combined with a high-quality sound reproduction syste

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Dzhabborov, N., A. Dobrinov, and A. Sergeev. "Vibration parameters and indicators of a dynamic tillage tool." IOP Conference Series: Earth and Environmental Science 937, no. 3 (2021): 032048. http://dx.doi.org/10.1088/1755-1315/937/3/032048.

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Abstract According to domestic and foreign research on the efficiency of active and passive vibrating tillage tools, the created vibration allows reducing the traction resistance of tillage implements compared to conventional tools, while improving the tillage quality. The study aimed to determine several vibration parameters and indicators of a dynamic tillage tool supplied with an energy storing and transmitting device: frequency and amplitude of oscillations, absolute velocity, vibration velocity, acceleration of vibration, a force of inertia, and oscillation energy. The study applied the e

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Kiyko, V. N., N. M. Naumovich, M. V. Davydov, and V. I. Zhuravliov. "Use of Cable Vibration Isolators for Vibration Protection of Quartz Generators." Doklady BGUIR 21, no. 4 (2023): 63–70. http://dx.doi.org/10.35596/1729-7648-2023-21-4-63-70.

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Vibration isolators with damping properties of steel multiwire cables for vibration protection of quartz oscillators have been studied. Modeling of vibration characteristics of structural elements was carried out using numerical methods. The elastic characteristics and design parameters of the cable for the vibration isolator are calculated. A harmonic analysis was carried out with given values of mass and stiffness under the influence of external vibrations. A sample of a cable vibration isolator has been developed and manufactured. To verify the calculated results obtained, the structure of

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Sánchez, Réne-Vinicio, Pablo Lucero, Jean-Carlo Macancela, et al. "Evaluation of Time and Frequency Condition Indicators from Vibration Signals for Crack Detection in Railway Axles." Applied Sciences 10, no. 12 (2020): 4367. http://dx.doi.org/10.3390/app10124367.

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Railway safety is a matter of importance as a single failure can involve risks associated with economic and human losses. The early fault detection in railway axles and other railway parts represents a broad field of research that is currently under study. In the present work, the problem of the early crack detection in railway axles is addressed through condition-based monitoring, with the evaluation of several condition indicators of vibration signals on time and frequency domains. To achieve this goal, we applied two different approaches: in the first approach, we evaluate only the vibratio

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Mohammed, Ouali, and Magraoui Rabah. "Contribution to Conditional Maintenance by Vibration Analysis of Rotating Machine Mechanical Failures and Proposed Solutions." Revista de Gestão Social e Ambiental 18, no. 10 (2024): e08541. http://dx.doi.org/10.24857/rgsa.v18n10-052.

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Objective: The aim of this study is to analyze the Cement Separator machine and identify potential condition indicators through vibration measurements and analysis. The goal is to diagnose and repair the machine before any material damage occurs. Background: Maintenance Technology: Modern maintenance technologies are crucial for monitoring equipment performance and planning timely maintenance interventions. Vibration Monitoring: As a key component in maintenance programs, especially for mechanical systems, vibration monitoring provides early warnings of faults based on the actual state of the

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Tian, Kunpeng, Jicheng Huang, Bin Zhang, Aimin Ji, and Zhonghua Xu. "Study on the Impact of Cutting Platform Vibration on Stalk Cutting Quality in Industrial Hemp." Agriculture 14, no. 2 (2024): 321. http://dx.doi.org/10.3390/agriculture14020321.

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In response to the unclear impact of header vibration on cutting performance (stalk cutting quality and cutting energy consumption) during field operations of industrial hemp harvesters, this study utilized a vibration recorder to collect information on header vibration during the operation of industrial hemp harvesters. Through data processing, the dominant range for the resonant frequency and amplitude of the cutting platform is primarily concentrated between 5–45 Hz and 0–35 mm, respectively. Using numerical simulation techniques, a quadratic orthogonal rotation combination experiment was c

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Shpachuk, V. P., M. A. Zasiadko, T. O. Suprun, and V. V. Dudko. "Variation coefficient of torsional vibrations of the connection nodes of vibrating machines." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 6 (2021): 85–89. http://dx.doi.org/10.33271/nvngu/2021-6/085.

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Purpose. To formalize the dependence of the eigenfrequencies of translational and torsional vibrations of the structural elements of the vibrating machine articulated by the connection node on their design parameters and mechanical characteristics, as well as regulatory requirements for vibration activity, strength and accuracy. To develop a method for selecting the design parameters of the elastic band element of the package, taking into account the specified values of the amplitude and frequency characteristics of the dynamic loads reproduced by the supporting structure and the coefficient o

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Zedgenizov, V. G., and S. Kh Faizov. "Research results of resonant vibration equipment for compaction of concrete mixtures on a physical model." Russian Automobile and Highway Industry Journal 21, no. 3 (2024): 366–75. http://dx.doi.org/10.26518/2071-7296-2024-21-3-366-375.

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Introduction. The purpose of this article is to confirm the results of research on resonant vibration equipment for compacting concrete mixtures obtained using a mathematical model. The object of research is an oscillatory system of resonant vibration equipment consisting of two masses interconnected by elastic and dissipative elements. In addition, the first mass is connected to a fixed base through elastic and dissipative elements.Materials and methods. The main provisions of the theory of similarity and statistical processing of experimental data are used in the research. The required numbe

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Sladkova, L. A., and A. N. Neklyudov. "Dynamics of the Rolling Stock and the Choice of Parameters of Vibration Dampers." World of Transport and Transportation 19, no. 4 (2022): 13–20. http://dx.doi.org/10.30932/1992-3252-2021-19-4-2.

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Modern railway rolling stock should meet requirements regarding comfort (maximum travel speed with minimum vibrations of wagons, noiselessness of movement, etc.).To eliminate the influence of dynamic loads, rolling stock is equipped with vibration dampers. The objective of the work is to select the parameters of the vibration dampers of rolling stock, depending on its characteristics, to ensure the due indicators of comfort and safety of transportation of passengers and goods by rail. To achieve this objective, applied methods of mathematical modelling were based on numerical programming of op

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13

Bespalov, A. L., I. G. Svidrak, and O. O. Boiko. "Improving the performance of vibration feeders with an electromagnetic vibration drive and a combined vibration system." Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 22, no. 93 (2020): 26–30. http://dx.doi.org/10.32718/nvlvet-f9305.

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Vibration loading devices are widely used in various branches of mechanical engineering to load piece blanks of automatic machines and automatic lines as well as robotic systems, automated systems and flexible automated production. Vibration devices for transportation and loading of miniature, small and medium-sized products are the most widely used. Modern designs of vibratory feeders, made according to the classical dynamic scheme and having a two-mass oscillating system, do not fully use the energy of the vibratory exciter to perform useful work. In addition, due to the presence of a heavy

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Susanto, Agus, Chia-Hung Liu, Keiji Yamada, Yean-Ren Hwang, Ryutaro Tanaka, and Katsuhiko Sekiya. "Milling Process Monitoring Based on Vibration Analysis Using Hilbert-Huang Transform." International Journal of Automation Technology 12, no. 5 (2018): 688–98. http://dx.doi.org/10.20965/ijat.2018.p0688.

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Vibration analysis is one method of machining process monitoring. The vibration obtained in machining is often nonlinear and of a nonstationary nature. Therefore, an appropriate signal analysis is needed for signal processing and feature extraction. In this research, vibrations obtained in the milling of thin-walled workpieces were analyzed using the Hilbert-Huang transform (HHT). The features obtained by the HHT served as machining-state indicators for machining process monitoring. Experimental results showed the effectiveness of the HHT method for detecting chatter and tool damage.

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Kundu, Pradeep, Ashish K. Darpe, and Makarand S. Kulkarni. "An ensemble decision tree methodology for remaining useful life prediction of spur gears under natural pitting progression." Structural Health Monitoring 19, no. 3 (2019): 854–72. http://dx.doi.org/10.1177/1475921719865718.

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This article presents an ensemble decision tree–based random forest regression methodology for remaining useful life prediction of spur gears subjected to pitting failure mode. The random forest regression methodology does not require an elaborate statistics background knowledge and has an inbuilt health indicator selection capability compared to other existing data-driven remaining useful life prediction approaches. A correlation coefficient parameter based on the residual vibration signal is used for monitoring and detecting the pitting progression in spur gears. The effectiveness of the cor

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16

Kryuchkov, A. N., S. M. Plotnikov, E. V. Sundukov, and A. E. Sundukov. "Simulation model of oscillations of the “sun gear – satellites” pair of turboprop engine planetary reduction gearbox in the presence of defects of tooth flanks." VESTNIK of Samara University. Aerospace and Mechanical Engineering 18, no. 4 (2020): 87–95. http://dx.doi.org/10.18287/2541-7533-2019-18-4-87-95.

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Defects of planetary reduction gearboxes of turboprop engines often cause excitation of high-frequency oscillations that bring about failures of compressor structural elements. The vibration behavior of these reduction grarboxes is a broadband process with the presence of a large quantity of vibration components, which significantly complicates the search for informative diagnostic indicators of defects. In order to simplify the procedure of identifying the vibrations caused by defects of toothed gearing a simulation model of the vibration behavior of a turboprop engine differential gear unit

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17

Konieczny, Jarosław, Waldemar Rączka, Marek Sibielak, and Janusz Kowal. "Energy Consumption of an Active Vehicle Suspension with an Optimal Controller in the Presence of Sinusoidal Excitations." Shock and Vibration 2020 (February 12, 2020): 1–11. http://dx.doi.org/10.1155/2020/6414352.

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Control of vibration is a significant problem in the design and construction of vehicle suspensions. The usage of controlled suspensions is important due to ride comfort, driving safety, and vehicle road holding. The control law for such systems is usually determined as a solution of an optimisation problem with a quality indicator. The effectiveness of vibration reduction is possible to be improved in the entire useful frequency range of a system operation, but usually increasing external energy consumption is observed. An additional problem in the case of vehicle suspensions includes the nec

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18

Lv, Saige, and Xiong Hu. "Research on Performance Degradation Assessment and Abnormal Health Status Detection of Quayside Crane Lifting Gearbox Based on Information Fusion." Journal of Marine Science and Engineering 11, no. 7 (2023): 1434. http://dx.doi.org/10.3390/jmse11071434.

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In order to solve the problems of subjectivity in the extraction of traditional degradation features and incomplete degradation information contained in a single sensor signal, a performance degradation assessment and abnormal health status detection method based on information fusion for the quayside crane lifting gearbox is proposed. Firstly, the correlation between the vibration and temperature of the gearbox is analyzed; secondly, the Convolutional Neural Network (CNN) and entropy degradation features from the full fault cycle vibration and temperature data of the lifting gearbox are extra

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Elbek M. Mirjuraev, Askar U. Sadikov, Shokhrukh Sh Fatkhullaev, Mukaddaskhon A. Hamrakulova,. "Multiple Influence of Vibration on Biochemical Brain Indicators." Tuijin Jishu/Journal of Propulsion Technology 44, no. 4 (2023): 6212–17. http://dx.doi.org/10.52783/tjjpt.v44.i4.2119.

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Dysfunction of the nervous system is one of the main manifestations caused by vibration. With repeated exposure to vibration, significant changes in the activity of enzymes and the content of the studied substrates in the brain tissue of experimental animals are observed. The observed changes in the activity of enzymes and the content of the studied substrates of brain tissue and the associated disturbances in the basic biochemical metabolic processes may be the direct cause of serious disorders of the functions of the nervous system. According to research results, it was revealed that exposur

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20

Tsurkan, Oleh, Anatoly Spirin, Andrii Didyk, and Mykola Bondarenko. "WAYS TO INCREASE THE INTENSITY OF THE WALNUT DRYING PROCESS." Vibrations in engineering and technology, no. 4(115) (December 24, 2024): 52–59. https://doi.org/10.37128/2306-8744-2024-4-7.

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Drying is the most important process in the processing of plant products, including walnuts. Convective heat dryers are the most common in agriculture due to their high energy efficiency, relative simplicity of design and reliability in operation. Modern serial convective dryers consume 5-7 times more energy than an "ideal" dryer. Intensification of the drying process can be carried out in two main ways – by increasing the temperature difference between the drying agent and the material and improving the heat exchange conditions between them. When drying walnuts, the most acceptable way is to

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21

Zhao, Weiqiang, Jianhua Deng, Zhiqiang Jin, Ming Xia, Gang Wang, and Zhengwei Wang. "A Comparative Analysis on the Vibrational Behavior of Two Low-Head Francis Turbine Units with Similar Design." Water 17, no. 1 (2025): 113. https://doi.org/10.3390/w17010113.

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With the requirement of flexible operation of hydraulic turbine units, Francis turbine units have to adjust their output into extended operating ranges in order to match the demand of the power grid, which leads to more off-design conditions. In off-design conditions, hydraulic excitation causes excessive stress, pressure pulsation, and vibration on the machines. Different designs of Francis turbines cause different hydraulic excitations and vibrational behaviors. To conduct better condition monitoring and fault prognosis, it is of paramount importance to understand the vibrational behavior of

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Medina Santiago, Alejandro, Jorge Antonio Orozco Torres, Carlos Arturo Hernández Gracidas, Salvador Hernández Garduza, and Javier Duarte Franco. "Diagnosis and Study of Mechanical Vibrations in Cargo Vehicles Using ISO 2631-1:1997." Sensors 23, no. 24 (2023): 9677. http://dx.doi.org/10.3390/s23249677.

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This study presents the design and implementation of an electronic system aimed at capturing vibrations produced during truck operation. The system employs a graphical interface to display vibration levels, ensuring the necessary comfort and offering indicators as a solution to mitigate the damage caused by these vibrations. Additionally, the system alerts the driver when a mechanical vibration that could potentially impact their health is detected. The field of health is rigorously regulated by various international standards and guidelines. The case of mechanical vibrations, particularly tho

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Minnivaleev, T. N., L. S. Kuleshova, I. G. Arslanov, A. A. Gizzatullina, and A. N. Minnivaleev. "Influence of shock-vibration loads of drilling equipment on the drilling indicators of oil and gas wells." Journal of Physics: Conference Series 2176, no. 1 (2022): 012025. http://dx.doi.org/10.1088/1742-6596/2176/1/012025.

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Abstract When drilling oil and gas wells, downhole and drilling wellhead equipment is subject to the influence of significant vibration processes of different directions with different amplitude-frequency characteristics. The paper describes the main sources of vibration of drilling equipment, which have a downhole origin. In this paper an amplitude-frequency characteristic of oscillatory processes of a drill string and their influence on drilling performance are given. In addition to the sources of fluctuations of the bottomhole nature of origin, sources of the wellhead nature can also be dis

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Lin, Hao-Pu, Yuan-Chieh Chen, Chin-Chuan Han, Yu-Chi Wu, and Jin-Yuan Lin. "A Mold Damage Monitoring Algorithm for Power Metallurgy Molding Machines Using Bidirectional Long Short-Term Memory on an Internet of Things Platform." Sensors 25, no. 7 (2025): 2143. https://doi.org/10.3390/s25072143.

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In this paper, an analysis and monitoring algorithm is proposed for mold health evaluation using vibration data. Two inertial measurement units (IMUs) and an embedded system are first used to acquire vibration data from a powder metallurgy molding machine. These data are collected on an Internet of Things (IoT) platform using the Message Queueing Telemetry Transport (MQTT) protocol. For data analysis, the vibration signal on the Z axis is segmented to label the contact section of the upper and middle molds, and the corresponding vibration data of the stamping friction on the X, Y, and Z axes a

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Zhang, Xun, Linghui Ruan, Yu Zhao, Xiaogang Zhou, and Xiaozhen Li. "A frequency domain model for analysing vibrations in large-scale integrated building–bridge structures induced by running trains." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 234, no. 2 (2019): 226–41. http://dx.doi.org/10.1177/0954409719841793.

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Integrated building–bridge structures are increasingly common in high-speed railway stations, where the elevated track floor is directly subjected to train–track dynamic forces that result in excessive vibrations. The common methods of predicting the train-induced vibrations in large-scale IBBS are implemented in the time domain and can have prohibitively long computation times. This paper presents a frequency domain model for the vibration analysis of large-scale IBBS, with the aim of reducing the computation time while retaining sufficient accuracy. The model consists of three coupled subsys

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Buzzoni, M., E. Mucchi, G. D’Elia, and G. Dalpiaz. "Diagnosis of Localized Faults in Multistage Gearboxes: A Vibrational Approach by Means of Automatic EMD-Based Algorithm." Shock and Vibration 2017 (2017): 1–22. http://dx.doi.org/10.1155/2017/8345704.

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The gear fault diagnosis on multistage gearboxes by vibration analysis is a challenging task due to the complexity of the vibration signal. The localization of the gear fault occurring in a wheel located in the intermediate shaft can be particularly complex due to the superposition of the vibration signature of the synchronous wheels. Indeed, the gear fault detection is commonly restricted to the identification of the stage containing the faulty gear rather than the faulty gear itself. In this context, the paper advances a methodology which combines the Empirical Mode Decomposition and the Tim

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Kaaïs, Khoualdia, Khoualdia Tarek, Lakikza Abdelmalek, and Guerti Nasreddine. "Using deep artificial neural networks for diagnosing bearing defects in induction motors with specific indicators." STUDIES IN ENGINEERING AND EXACT SCIENCES 5, no. 3 (2024): e12610. https://doi.org/10.54021/seesv5n3-048.

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Bearings are the most common type of defect in induction motors in the industrial world. This study aims to develop a comprehensive approach for monitoring and diagnosing bearing faults in these motors. However, two motors were dedicated to collecting a very large database using vibration sensors, one healthy and the other with a bearing defect. Sixteen temporal vibration indicators, including six that are specific to bearings, were calculated from the vibration signals, which represent the different operating states of the two motors. Based on simultaneous monitoring of these 16 vibration ind

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Migal, Vasiliy, Shchasiana Arhun, and Andrii Hnatov. "Vibration characteristics of tractor gearboxes." Vehicle and electronics. Innovative technologies, no. 21 (June 29, 2022): 87–96. http://dx.doi.org/10.30977/veit.2022.21.0.07.

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Problem. Improving the efficiency, quality, reliability and economy of tractor equipment is one of the most important tasks of modern society. This is due to the fact that in agriculture, tractors can perform up to 80% of various operations. The cost of production, product quality, compliance with the conditions of technological operations, etc. depend on the properties and reliability of tractors. The main factor limiting the effective use of tractors in agriculture is the problem of insufficient reliability of tractors, namely, the reliability of its individual components. One of the most im

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Erduran, Emrah, Frida Kristin Ulla, and Lone Næss. "A Framework for Long-Term Vibration-Based Monitoring of Bridges." Sensors 21, no. 14 (2021): 4739. http://dx.doi.org/10.3390/s21144739.

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A new framework for long-term monitoring of bridges is proposed in order to negate (i) the impact of measurement uncertainties on damage detection in vibration-based structural health monitoring and (ii) the low sensitivity of damage indicators to low levels of damage. The framework is developed using three vibration-based damage indicators that have an intuitive physical correlation with damage: modal curvature, modal strain energy and modal flexibility. The article first quantifies the efficacy of these damage indicators when based on two observations, one from the undamaged state and one fr

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Liferenko, Vladimir Yuryevich. "On separate reasons of vibration occurrence in passenger cars." Transport of the Urals, no. 1 (2020): 48–53. http://dx.doi.org/10.20291/1815-9400-2020-1-48-53.

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One of most important ecological tasks for carriage engineering is the abatement of vibrations in passenger cars. Nowadays before forwarding to the consumer all produced and modernized car models pass a mandatory certification procedure. During the procedure all characteristics of cars are thoroughly investigated including vibroacoustic characteristics because the values of these indicators significantly affect health of passengers and staff. Nevertheless, data from medical examination of guards show that the number of illnesses caused by the influence of excessive vibration levels doesn’t dec

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Kuprina, Nadezhda I., Ekaterina V. Ulanovskaya, and Olga A. Kochetova. "Ultrasound features of peripheral angiodistonic syndrome of the upper extremities in vibration disease." Russian Journal of Occupational Health and Industrial Ecology 60, no. 11 (2020): 815–17. http://dx.doi.org/10.31089/1026-9428-2020-60-11-815-817.

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Introduction. Vibration disease (VD) is an example of the most common pathology due to the systematic exposure of the worker to intense vibration with sufficient work experience, the main manifestation of which is peripheral angiodystonic syndrome. The aim of study was to learn the features of peripheral blood flow in the arteries of the forearm in vibration disease using the ultrasound method. Materials and methods. The radial and ulnar arteries in patients with vibration disease were examined by ultrasound in B- and PW-mode. These materials present the results of an ultrasound assessment of

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Liu, Hao, Chengzhao Liu, Jiake Fu, Chenzhe Ma, Ye Zhang, and Yumeng Lei. "Intelligent Analysis of Hydraulic Concrete Vibration Time Based on Convolutional Neural Network." Advances in Civil Engineering 2023 (October 7, 2023): 1–11. http://dx.doi.org/10.1155/2023/5530102.

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The vibrating of concrete is one of the most important procedures that directly determines the quality of construction projects. The concrete vibration quality in field construction is mainly judged by the experience of workers, lacking quantitative indicators, and necessary supervision. However, the lack of research about concrete vibration quality led to these problems are still existing. There are some methods are proposed that are too difficult, or too expensive to use in field construction. Combined with the pouring project of Jianquan Pumped Storage Power Station in Yunyang, China, this

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Bakinowski, Łukasz, and Bartosz Firlik. "Influence of the type of place occupied by a tram passenger on the ride comfort." Archives of Transport 62, no. 2 (2022): 49–58. http://dx.doi.org/10.5604/01.3001.0015.9176.

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In cities with developed transport infrastructure, many people use public transport in their everyday lives. In order for the passenger's journey to be comfortable and for the passenger to travel more willingly by tram than by car, many conditions must be met. A passenger must feel comfortable in a public transport vehicle, which includes, among others: appropriate temperature in the vehicle, no crowding, the possibility to seat, the possibility of a quick vehicle-change, short travel time, no noise and many others. A very important criterion from the point of view of travel comfort is also th

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Merhar, Miran, and Rostand Moutou Pitti. "The Influence of Thermal Modification, Moisture Content, Frequency, and Vibration Direction Plane on the Damping of Spruce Wood (Picea abies) as Determined by the Wavelet Transform Method." Forests 16, no. 7 (2025): 1055. https://doi.org/10.3390/f16071055.

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This article analyses the main effect and interaction of thermal modification, wood moisture content, frequency, and vibration direction on the damping of spruce wood. Samples were thermally modified at three different temperatures (180 °C, 200 °C, and 230 °C) and then equilibrated at four different relative humidities (RHs) (20%, 44%, 76%, and 88%). The specimens were then freely supported and excited with a hammer to vibrate freely. Damping at the frequencies of the first three bending vibration modes for vibrations in the radial (LR plane) and tangential (LT plane) directions was determined

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Huang, Wei, Ahmed Farahat, and Chetan Gupta. "Similarity-based Feature Extraction from Vibration Data for Prognostics." Annual Conference of the PHM Society 12, no. 1 (2020): 10. http://dx.doi.org/10.36001/phmconf.2020.v12i1.1298.

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Many techniques for prognostics depend on estimating then forecasting health indicators that reflect the overall health or performance of an asset. For vibration data, health indicators are typically calculated by combining various vibration measurements along with derived features extracted from time, frequency or time-frequency domain analysis. However, selecting or handcrafting good features is a labor-intensive task. On the other hand, deep learning models might be able to learn health indicators automatically from vibration data but require large amount of training data, which are typical

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Ma, Li, Jianguo Zhang, Chen Xu, et al. "Comprehensive Evaluation of Blast Casting Results Based on Unascertained Measurement and Intuitionistic Fuzzy Set." Shock and Vibration 2021 (January 28, 2021): 1–14. http://dx.doi.org/10.1155/2021/8864618.

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In order to make a scientific and accurate evaluation of blast casting results, according to the characteristics of blast casting-dragline stripping system, effective casting rate, looseness coefficient, limit vibration velocity, powder factor, fragmentation distribution, muck pile shape, boulder generation, damage degree of coal seam step, and dust pollution are selected as the evaluation indicators of blast casting results, and a classification standard is established. The unascertained measure theory was adopted to determine the membership degree of influencing factor indicator, which expan

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Wang, Yan Yan, Jian Guo Yang, and Zhou Ying Ji. "Study on Gasoline Engine Knock Indicators Based on Wavelet Transform and Rough Set." Advanced Materials Research 651 (January 2013): 625–30. http://dx.doi.org/10.4028/www.scientific.net/amr.651.625.

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In order to improve the knock diagnosis accuracy, knock tests were carried out on a gasoline engine, and the slight knock characteristics from vibration signals of the gasoline engine were extracted by wavelet transform method. Making use of sub-band signals which were generated by wavelet transform of vibration signals as the style signals, 23 time-domain parameters were studied by using rough set theory, and the redundant relationship of the various parameters for describing the knock characteristic was revealed. Finally, the best parameters combination of peak-to-peak value, mean amplitude

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Yamanin, A. I. "On Vibrational and Dynamic Characteristics of Engines with Deactivated Cylinders." Proceedings of Higher Educational Institutions. Маchine Building, no. 02 (719) (February 2020): 26–34. http://dx.doi.org/10.18698/0536-1044-2020-2-26-34.

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The article examines some features of dynamics of engines with shut-off cylinders. This technology can promote reduction of fuel consumption and emission of toxic substances with exhaust fumes at partial speed and loading modes. However, the dynamics of such engines have hardly been considered in previous works. Using calculations (solid state modeling, simulation of motion using software for studying dynamics of mechanisms, as well as the finite element method), the indicators of uniformity of stroke and torque, vibration displacement and vibration velocity of various points of the structure

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Wu, Xi, and Jim Meagher. "A Two-Disk Extended Jeffcott Rotor Model Distinguishing a Shaft Crack from Other Rotating Asymmetries." International Journal of Rotating Machinery 2008 (2008): 1–11. http://dx.doi.org/10.1155/2008/846365.

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A mathematical model of a cracked rotor and an asymmetric rotor with two disks representing a turbine and a generator is utilized to study the vibrations due to imbalance and side load. Nonlinearities typically related with a “breathing” crack are included using a Mayes steering function. Numerical simulations demonstrate how the variations of rotor parameters affect the vibration response and the effect of coupling between torsional and lateral modes. Bode, spectrum, and orbit plots are used to show the differences between the vibration signatures associated with cracked shafts versus asymmet

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Benrahmoune, Mohamed, Hafaifa Ahmed, Guemana Mouloud, and Chen XiaoQi. "Detection and Modeling Vibrational Behavior of a Gas Turbine Based on Dynamic Neural Networks Approach." Strojnícky casopis – Journal of Mechanical Engineering 68, no. 3 (2018): 143–66. http://dx.doi.org/10.2478/scjme-2018-0032.

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AbstractDuring the gas turbine exploitation the presence of small defects can cause very high vibration amplifications, localized on the components of this rotating machine. For this, a diagnostic process is necessary for decision-making during the monitoring of failures caused by vibration phenomena, which consists in observing the system by comparing its current data with the data coming from a normal operation. These indicators help engineer to determine the symptoms for the failing components of the system. This work deals with problems related to these vibrations, with the aim of developi

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Sandoval, Diego, Urko Leturiondo, Yolanda Vidal, and Francesc Pozo. "Entropy Indicators: An Approach for Low-Speed Bearing Diagnosis." Sensors 21, no. 3 (2021): 849. http://dx.doi.org/10.3390/s21030849.

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To increase the competitiveness of wind energy, the maintenance costs of offshore floating and fixed wind turbines need to be reduced. One strategy is the enhancement of the condition monitoring techniques for pitch bearings, because their low operational speed and the high loads applied to them make their monitoring challenging. Vibration analysis has been widely used for monitoring the bearing condition with good results obtained for regular bearings, but with difficulties when the operational speed decreases. Therefore, new techniques are required to enhance the capabilities of vibration an

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Buyalsky, V. I. "The Dynamic Analysis of Optimizing Function Within the Limits of Vibration Rotor Systems of Wind Electric Installation." Intellekt. Sist. Proizv. 20, no. 2 (2022): 50–60. http://dx.doi.org/10.22213/2410-9304-2022-2-50-60.

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The problem of construction of basic and optimizing function within the limits of dynamic analysis of rotor systems wind-power installation vibrating fields, as one of subtasks of the mathematical algorithms of system dynamic behavior to modify wind-electric installation automatic control is solved that provides reduction of vibrations of all rotor system elements at different modes of operation power-unit of drive loading that promotes improvement of reliability indicators modern wind- installation components. Optimizing function has essential advantage with respeсt to the basic one as a resu

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Wang, Aimin, Sheng Lin, Guoxing Wu, Xiaopeng Li, and Tao Wang. "Characteristic Extraction and Assessment Methods for Transformers DC Bias Caused by Metro Stray Currents." Entropy 26, no. 7 (2024): 595. http://dx.doi.org/10.3390/e26070595.

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Metro stray currents flowing into transformer-neutral points cause the high neutral DC and a transformer to operate in the DC bias state.Because neutral DC caused by stray current varies with time, the neutral DC value cannot be used as the only characteristic indicator to evaluate the DC bias risk level. Thus, unified characteristic extraction and assessment methods are proposed to evaluate the DC bias risk of a transformer caused by stray current, considering the signals of transformer-neutral DC and vibration. In the characteristic extraction method, the primary characteristics are obtained

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Melentev, Andrey V., and Oleg A. Oshkoderov. "Assessment of the diagnostic significance of modern biomarkers and hemodynamic alterations in workers of vibration-hazardous occupations." HEALTH CARE OF THE RUSSIAN FEDERATION 65, no. 4 (2021): 379–83. http://dx.doi.org/10.47470/0044-197x-2021-65-4-379-383.

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Introduction. One of the most significant tasks in modern labor medicine is to reduce the indicators of early disability in persons in contact with harmful and dangerous factors of the production environment. The issue of finding markers of early preclinical manifestations of vibrational disease and establishing comorbid conditions that are prognostically unfavorable for the course of the underlying occupational disease remains relevant. The purpose of the study is assessment of diagnostic significance of current neurospecific biomarkers and hemodynamic changes in workers of the profession rel

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Yakimova, Natalya L., Vladimir A. Pankov, Aleksandr V. Lizarev, et al. "Neurophysiological and morphological effects in the post-exposure vibration period during experimental modeling." Russian Journal of Occupational Health and Industrial Ecology, no. 5 (May 31, 2019): 284–90. http://dx.doi.org/10.31089/1026-9428-2019-59-5-284-290.

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Introduction. Vibration disease continues to occupy one of the leading places in the structure of professional pathology. In workers after the termination of contact with vibration generalization and progression of violations in an organism is noted. The pathogenetic mechanisms of the progredient course of disturbances in the nervous system in the post-contact period of vibration exposure remain insufficiently studied.The aim of the study was to test an experimental model of vibration exposure to assess the neurophysiological and morphological effects of vibration in rats in the dynamics of th

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Bajric, Rusmir, Ninoslav Zuber, Georgios Alexandros Skrimpas, and Nenad Mijatovic. "Feature Extraction Using Discrete Wavelet Transform for Gear Fault Diagnosis of Wind Turbine Gearbox." Shock and Vibration 2016 (2016): 1–10. http://dx.doi.org/10.1155/2016/6748469.

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Vibration diagnosis is one of the most common techniques in condition evaluation of wind turbine equipped with gearbox. On the other side, gearbox is one of the key components of wind turbine drivetrain. Due to the stochastic operation of wind turbines, the gearbox shaft rotating speed changes with high percentage, which limits the application of traditional vibration signal processing techniques, such as fast Fourier transform. This paper investigates a new approach for wind turbine high speed shaft gear fault diagnosis using discrete wavelet transform and time synchronous averaging. First, t

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Qiu, Lemiao, Ci He, Guodong Yi, et al. "Energy-Based Vibration Modeling and Solution of High-Speed Elevators Considering the Multi-Direction Coupling Property." Energies 13, no. 18 (2020): 4821. http://dx.doi.org/10.3390/en13184821.

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Vibration of a high-speed elevator is one of the major factors contributing to a safe, stable and comfortable ride. Vibration control and systematic optimization rely on the establishment of an accurate and reliable model. An energy-based vibration model (EVM) is proposed in this paper to describe the multi-directional coupling properties of high-speed elevators. After analyzing the structural and kinematic characteristics, a combination of the kinematic energy, elastic potential energy and virtual works is implemented to describe the vibrational characteristics. The Gaussian precise integrati

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Zhao, H., F. K. Choy, and M. J. Braun. "Transient and Steady State Vibration Analysis of a Wavy Thrust Bearing." Journal of Tribology 128, no. 1 (2005): 139–45. http://dx.doi.org/10.1115/1.2033900.

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This paper describes a numerical procedure for analyzing the dynamics of transient and steady state vibrations in a wavy thrust bearing. The major effects of the wavy geometry and the operating parameters on the dynamic characteristics of the bearing had been discussed in a previous paper; the present paper thus concentrates on examining the relationships between the development of the transient and steady state vibrations when operating conditions are parametrically varied. Special attention is given to the development of steady state vibrations from initial transients with comparisons and co

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Babanov, S. A., A. V. Melentyev, T. M. Kiryushina, et al. "Quality of life in vibration disease from the effects of local vibration and its combination with osteoarthritis." Terapevt (General Physician), no. 12 (December 18, 2023): 58–66. http://dx.doi.org/10.33920/med-12-2312-06.

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The article describes the features of the quality of life in vibration disease from exposure to local vibration and its combination with osteoarthritis. It has been proven that when exposed to industrial vibration, there is a change in all indicators characterizing the quality of life, which is most pronounced in second-degree vibration disease from exposure to local vibration and its combination with osteoarthritis.

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Tian, Zhi Gang, and Ming J. Zuo. "Spur Gear Crack Propagation Assessment Using Model-Based Analysis and Simulation." Key Engineering Materials 413-414 (June 2009): 299–304. http://dx.doi.org/10.4028/www.scientific.net/kem.413-414.299.

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Model-based gear dynamic analysis and simulation has been a promising way for developing e®ective gearbox vibration monitoring approaches. In this paper, based on the dynamic model of a one-stage gearbox with spur gears and one tooth crack, we investigate statistical indicators and the discrete wavelet transform (DWT) technique to identify e®ective and sensitive health indicators for re°ecting the crack propagation level. Our results suggest that the root mean square (RMS) indicator is a good statistical indicator to re°ect the crack propagation in the early stage; DWT can improve the sensitiv

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