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Artigos de revistas sobre o tema "Vibration"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 25 de julho de 2025

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1

Ryazancev, V., M. Gerasimov, N. Lyubimyy, A. Pol'shin, and A. Tihonov. "PHYSICAL MODEL OF A TWO-STAGE VIBRATION UNIT FOR GENERATING ASYMMETRIC OSCILLATIONS." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 7, no. 10 (2022): 107–14. http://dx.doi.org/10.34031/2071-7318-2022-7-10-107-114.

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Vibrating devices occupy a large cluster in the construction and road construction industry. The improvement of all vibration machines begins, first of all, with a vibration device, as the main working body of the machine. Basically, vibrators acted as a vibrating device for all road construction equipment. Initially, vibrators with circular vibrations were used, which are not so effective and not always sufficient for performing special work on driving piles into the ground and also extracting them from the soil. Vibratory systems with asymmetric vibrations are increasingly being used in the

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2

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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3

Yu, Yingjie, Ying Cao, Qinghui Lai, et al. "Design and Operation Parameters of Vibrating Harvester for Coffea arabica L." Agriculture 13, no. 3 (2023): 700. http://dx.doi.org/10.3390/agriculture13030700.

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This study designed a handheld vibrating coffee harvester to improve the mechanized harvesting of Coffea arabica L. The proposed device was used to vibrate branches of Coffea arabica L. trees, and the shedding of coffee fruit and the operation parameters of vibrational harvesting were analyzed. Images captured using high-speed photography were used to derive a force equation that represents the forced vibration of the coffee fruit-stalk joint. In addition, the vibrations of coffee berries and branches were theoretically analyzed, and the results were used to establish a dynamic vibration model

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4

Mohanty, Lipi, Yaowen Yang, and Swee Tjin. "Passively Conducted Vibration Sensing with Fiber Bragg Gratings." Applied Sciences 8, no. 9 (2018): 1599. http://dx.doi.org/10.3390/app8091599.

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Measuring vibrations is a common method of monitoring the integrity of structures and heavy machinery, that are subject to dynamic loads. Strong vibrations for prolonged periods of time can be caused by various sources, such as trains, motors and heavy machinery. These strong vibrations should be identified and managed to ensure operational safety. This study proposes a flexible metal beam sensor with a fiber Bragg grating (FBG) mounted on the surface to measure the vibrational frequency. We present a sensor for measuring the vibrational frequencies on-site by placing the beam so that it makes

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5

Bratu, Polidor. "Multibody System with Elastic Connections for Dynamic Modeling of Compactor Vibratory Rollers." Symmetry 12, no. 10 (2020): 1617. http://dx.doi.org/10.3390/sym12101617.

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The dynamic model of the system of bodies with elastic connections substantiates the conceptual basis for evaluating the technological vibrations of the compactor roller as well as of the parameters of the vibrations transmitted from the vibration source to the remainder of the equipment components. In essence, the multi-body model with linear elastic connections consists of a body in vertical translational motion for vibrating roller with mass m1, a body with composed motion of vertical translation and rotation around the transverse axis passing through its weight center for the chassis of th

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6

Ni, Cheng-Hua, Yueh-Hsun Lu, Li-Wei Chou, et al. "Analysis of Vibration Frequency and Direction for Facilitating Upper-Limb Muscle Activity." Biology 12, no. 1 (2022): 48. http://dx.doi.org/10.3390/biology12010048.

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We aimed to determine the effect of vibration frequency and direction on upper-limb muscle activation using a handheld vibrator. We recruited 19 healthy participants who were instructed to hold a handheld vibrator in their dominant hand and maintain the elbow at 90° flexion, while vertical and horizontal vibrations were applied with frequencies of 15, 30, 45, and 60 Hz for 60 s each. Surface electromyography (EMG) measured the activities of the flexor digitorum superficialis (FDS), flexor carpi radialis (FCR), extensor carpi ulnaris (ECU), extensor carpi radialis (ECR), biceps, triceps, and de

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7

Lian, Jijian, Yan Zheng, Chao Liang, and Bin Ma. "Analysis for the Vibration Mechanism of the Spillway Guide Wall Considering the Associated-Forced Coupled Vibration." Applied Sciences 9, no. 12 (2019): 2572. http://dx.doi.org/10.3390/app9122572.

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During the flood discharge in large-scale hydraulic engineering projects, intense flow-induced vibrations may occur in hydraulic gates, gate piers, spillway guide walls, etc. Furthermore, the vibration mechanism is complicated. For the spillway guide wall, existing studies on the vibration mechanism usually focus on the vibrations caused by flow excitations, without considering the influence of dam vibration. According to prototype tests, the vibrations of the spillway guide wall and the dam show synchronization. Thus, this paper presents a new vibration mechanism of associated-forced coupled

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8

Xu, Jie, Guozhang Wang, and Jiyan Lin. "Coupled vibration characteristics and optimization design of the cylindrical-exponential ultrasonic concentrator." Journal of Physics: Conference Series 2822, no. 1 (2024): 012073. http://dx.doi.org/10.1088/1742-6596/2822/1/012073.

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Abstract In this study, the vibrations of cylindrical-exponential ultrasonic concentrators are investigated, with the objective of improving energy transfer efficiency. Traditional analyses, often one-dimensional, have been found to inadequately consider the effects of height on vibration behaviour. To address this gap, the equivalent elasticity method is employed to provide a more comprehensive understanding of vibrational phenomena. The coupled vibration of the concentrator is regarded as an interaction between a longitudinal vibration and a plane radial vibration. A mechanical coupling coef

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9

Fardelin, Gustav, Niklas Ricklund, and Ing-Liss Bryngelsson. "Hand nerve function after mountain bike cycling." Journal of Science and Cycling 11, no. 3 (2022): 23–32. http://dx.doi.org/10.28985/1322.jsc.10.

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Hand-arm vibrations can cause permanent injuries and temporary changes affecting the sensory and circulatory systems in the hands. Vibrational effects have been thoroughly studied within the occupational context concerning work with handheld vibrating tools. Less is known about vibrational exposure and risk of effects during cycling. In the present study, 10 cyclists were recruited for exposure measurements of hand-arm vibrations during mountain bike cycling on the trail, and the effects on the nerve function were examined with quantitative sensory testing (QST) before and after the ride.&#x0D

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10

Yin, Zhen, Hua Li, Bang Fu Wang, and Ke Feng Song. "Study on the Design of Longitudinal-Torsional Composite Ultrasonic Elliptical Vibrator Based on FEM." Advanced Materials Research 308-310 (August 2011): 341–45. http://dx.doi.org/10.4028/www.scientific.net/amr.308-310.341.

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Based on FEM, a new type of ultrasonic elliptic vibrator design method was proposed, the ultrasonic elliptic vibration was achieved by the structural curve of the longitudinal and torsional vibrations. The impedance and vibration characteristics of the new longitudinal-torsional composite ultrasonic elliptic vibrator prototype were tested. It provides an important basis for impedance matching and longitudinal-torsional composite ultrasonic elliptical vibration application.

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11

Niu, Jianye, Jiang Wu, Qiming Liu, Li Chen, and Shijie Guo. "A Dumbbell Shaped Piezoelectric Motor Driven by the First-Order Torsional and the First-Order Flexural Vibrations." Actuators 9, no. 4 (2020): 124. http://dx.doi.org/10.3390/act9040124.

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A piezoelectric motor driven by the first-order torsional and first-order flexural (T/F) vibrations is designed, fabricated, and tested in this study. The actuating force is generated by the torsional vibration of the dumbbell-shaped vibrator, while the elliptical motion shape is adjusted with the flexural vibration. The rotor, pressed onto the vibrator’s lateral surface, is frictionally driven with the vibrator. Here, the torsional vibration, the shear modes of piezoelectric ceramics, and the driving method may contribute to high torque and high output power. To test the feasibility of our pr

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12

Rasangika, Ambagaha Hewage Dona Kalpani, Mohammad Shakir Nasif, and Rafat Al-Waked. "Comparison of Forced Convective Heat-Transfer Enhancement of Conventional and Thin Plate-Fin Heat Sinks under Sinusoidal Vibration." Applied Sciences 13, no. 21 (2023): 11909. http://dx.doi.org/10.3390/app132111909.

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Applying sinusoidal vibration to heat sinks has proven to be a promising technique for improving heat transfer by disrupting the thermal boundary layer. However, applying sinusoidal vibration to the base of thin plate-fin heat sinks can cause a flapping motion within the fins, further enhancing heat transfer. Therefore, the current study numerically investigates and compares the effects of sinusoidal vibrations on the thermal performance of conventional and thin plate-fin heat sinks. The study concludes that increased vibrational amplitude and frequency (f ˃ 30 Hz) increases the vibration-assi

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13

Suzuki, Kiyoshi, Takuya Takada, Zhi Rong Zhou, Takuya Okamichi, Manabu Iwai, and Shinichi Ninomiya. "Effects of Ultrasonic Vibrations Given to an Electrode on the EDM Performance in Processing PCD." Advanced Materials Research 565 (September 2012): 394–99. http://dx.doi.org/10.4028/www.scientific.net/amr.565.394.

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EDM machinability of PCD was investigated using a copper electrode giving ultrasonic vibrations. In this series of EDM experiments, three types of ultrasonic vibration modes were selected (axial vibration, flexural vibration and complex vibration). From the experimental results, it was found that EDM efficiency became 3 times higher than the ordinary EDM (no vibration given to the electrode) under the two specific vibration modes, namely, 1) the axial vibration (large) mode and 2) the complex vibration (axial vibration: large + flexural vibration: small) mode. Furthermore, it was shown that th

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14

Picu, Mihaela. "A Study of Vertical Vibration Transmissibility by the Human Body." Applied Mechanics and Materials 325-326 (June 2013): 152–57. http://dx.doi.org/10.4028/www.scientific.net/amm.325-326.152.

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The transmission of longitudinal vibration (generated by the vibrating platform Brüel & Kjær 4827) in the whole body of ten subjects was investigated. Altogether 200 individual tests were made. Vibration was measured with 356A16 PCB Piezotronics triaxial accelerometers fixed to the toes, ankles, lumbar, cervical, fingers, elbow and shoulder. Vibrations were analyzed with a multiple acquisition vibrations system NetdB. Data were processed using dBFA Suite. Vibration time was 1min and frequency range was between 10-40Hz, because the low frequencies are the resonance frequencies for the huma

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15

Mistry, Yash Ashwin, and Kushagra Goel. "Surface Mounted Active Vibration Cancellation Device Using Raspberry Pi." ECS Transactions 107, no. 1 (2022): 19289–97. http://dx.doi.org/10.1149/10701.19289ecst.

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Active vibration cancellation device detects vibrations on a host surface using a piezoelectric vibration sensor, amplifies them using a signal amplifier, and sends them to a Raspberry Pi board implemented with PID control, responsible for signal processing, which further actuates Piezoelectric actuators vibrating at a phase difference of 180° to the vibrating surface (destructive interference) and reduces the vibrations over the surface. The device presented in this paper suggests an application that tries to make it accessible to a large group of people.

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16

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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17

Li, Hua, Jiang Jiang Zhao, Zhen Yin, and Kun Ren. "Design and Research of a New Ultrasonic Atomizing Vibrator." Applied Mechanics and Materials 328 (June 2013): 468–72. http://dx.doi.org/10.4028/www.scientific.net/amm.328.468.

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Based on the theory of ultrasonic vibration, a new type of ultrasonic atomizing vibrator (UAV) with a vibrating steel sheet was proposed. By using the finite element analysis software to simulation analysis and research for the new type of vibrator, the frequency and vibration mode of atomizing steel sheet was obtained and the prototype of vibrator was fabricated. The impedance and vibration displacement of the vibrator was tested and the experiment of the new type of vibrator was carried out, which verified the feasibility of the new type of vibrator design method.

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18

Гапонюк, Т. О., Р. В. Кірчук, and Л. Ю. Забродоцька. "USING HYDRAULIC PARAMETRIC VIBRATION EXCITER IN AGRICULTURAL ENGINEERING." СІЛЬСЬКОГОСПОДАРСЬКІ МАШИНИ, no. 48 (October 31, 2022): 7–14. http://dx.doi.org/10.36910/acm.vi48.778.

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Vibration technology is widely used in mechanical engineering, construction, road building and different sectors of the manufacturing. In agriculture, it is used for dosing feed, cleaning and sorting seeds, digging up root crops, planting potatoes, and transporting bulk materials. Vibrations make the mechanical system more stable in relation to external force disturbances and do not change the technological properties of materials during its movement along the working surfaces. Also, the material passing through the vibration zone is not damaged. A wide range of frequency and amplitude of vibr

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19

Dong, Jie, Yue Yang, and Zhi-Hui Wu. "Propagation characteristics of vibrations induced by heavy-haul trains in a loess area of the North China Plains." Journal of Vibration and Control 25, no. 4 (2018): 882–94. http://dx.doi.org/10.1177/1077546318802980.

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To study heavy train-related vibration, this paper examines the world's largest heavy-freight railway – the Daqin Railway – to study the impacts of the seasonally frozen soil layer on vibrational acceleration. With increasing axle weight, the peak and mean values of the acceleration increased. Vibration acceleration attenuated the most from the shoulder to the embankment footing (51%–71%), while the vibrations at 70 m were attenuated by more than 90%. Certain measures must be taken by those living within 70 m of the railway shoulder. In addition, the acceleration peak caused by trains running

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20

Jurevicius, M., V. Vekteris, V. Turla, A. Kilikevicius, and G. Viselga. "Investigation of the dynamic efficiency of complex passive low-frequency vibration isolation systems." Journal of Low Frequency Noise, Vibration and Active Control 38, no. 2 (2019): 608–14. http://dx.doi.org/10.1177/1461348418822230.

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In this study, the theoretical and experimental investigations of the dynamics of complex passive low-frequency vibration systems are described. It is shown that a complex system consisting of a vibrating platform, an optical table and a vibration isolation system of quasi-zero stiffness loaded by a certain mass may isolate low-frequency vibrations in a narrow frequency range only. In another case, the system does not isolate vibrations; it even operates as an amplifier. The frequencies that ensure the top efficiency of the vibration damping system of quasi-zero stiffness were established.

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21

Ragaišis, L., R. Jonušas, K. Ragulskis, and V. Jurėnas. "Research of Possibilities of Energy Transformation Using an Autovibrating System, Excited by Small Outer Excitement." Solid State Phenomena 113 (June 2006): 207–12. http://dx.doi.org/10.4028/www.scientific.net/ssp.113.207.

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There are lots of sources of disturbance in people’s surrounding environment - e.g. wind, sea, river flow, and intensive acoustic noise. These sources can cause auto vibrations of particular dynamic systems. Such phenomenon could be used for converting mechanical vibration energy to electrical energy. Solving this problem is topical because it could help to create autonomic sources of renewable energy. Dynamic model, described by a presumptive differential motion equation, of auto vibrating system, affected by airflow is made and inspected. Possible modes of vibrations and different states of

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22

Yu, Dongyang, Feihu Peng, Zhihao Zeng, et al. "Vibrational Dynamics of Rice Precision Hole Seeders and Their Impact on Seed Dispensation Efficacy." Agriculture 14, no. 2 (2024): 324. http://dx.doi.org/10.3390/agriculture14020324.

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This investigation considered the effects of both internal and external excitation vibrations on the efficacy of the seed dispenser in a rice precision hole seeder. Through comprehensive field tests, we analyzed vibrational characteristics during direct seeder operations and established a vibration seeding test bed for systematic examination of these effects. Time-domain analysis of the vibration data revealed a predominantly vertical vibration direction, with notably higher levels in sandy loam soil compared to clay loam. A correlation was observed between increased engine size and rotary plo

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23

Shiozaki, Tetsuya, Hisaya Tanaka, Akio Nozawa, Hideto Ide, and Masafumi Uchida. "Qualitative Evaluation by ERP for vibration Discrimination." Journal of Robotics and Mechatronics 14, no. 3 (2002): 313–17. http://dx.doi.org/10.20965/jrm.2002.p0313.

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We have developed a method of quantitative evaluation for vibration discrimination by event-related potentials (ERP). We made a modulation matrix of high-pass component f1: (40-200 Hz) and low-pass component f2: (2-20 Hz), and gave modulated vibrations to a forefinger by a piezoelectric vibrator. We examined ERP differences, which are amplitudes, areas and intervals, between a reference vibration of (f1, f2) = (40, 2) Hz and controlled vibrations.

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24

Sobolev, Vladimir I., and Tatiana N. Chernigovskaya. "Research into the dynamics of radio telescope foundationsusing laser vibration measuring equipment." Journal «Izvestiya vuzov. Investitsiyi. Stroyitelstvo. Nedvizhimost» 10, no. 3 (2020): 420–27. http://dx.doi.org/10.21285/2227-2917-2020-3-420-427.

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This study presents a technology for determining the dynamic parameters of the foundation structures of radio telescopes by a non-contact method based on the use of laser vibration measuring equipment. The main results of a dynamic process analysis are described. The research was carried out in the form of microdynamic tests of foundation structures with the determination of natural oscillation periods based on lower vibrational forms. Measurements of natural vibrations of radio telescope foundations under applied shock were performed, followed by spectral mapping of vibrational processes. The

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25

Beltran-Carbajal, Francisco, Hugo Francisco Abundis-Fong, Luis Gerardo Trujillo-Franco, Hugo Yañez-Badillo, Antonio Favela-Contreras, and Eduardo Campos-Mercado. "Online Frequency Estimation on a Building-like Structure Using a Nonlinear Flexible Dynamic Vibration Absorber." Mathematics 10, no. 5 (2022): 708. http://dx.doi.org/10.3390/math10050708.

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The online frequency estimation of forced harmonic vibrations on a building-like structure, using a nonlinear flexible vibration absorber in a cantilever beam configuration, is addressed in this article. Algebraic formulae to compute online the harmonic excitation frequency on the nonlinear vibrating mechanical system using solely available measurement signals of position, velocity, or acceleration are presented. Fast algebraic frequency estimation can, thus, be implemented to tune online a semi-active dynamic vibration absorber to obtain a high attenuation level of undesirable vibrations affe

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26

Shiozaki, Tetsuya, Akio Nozawa, Yoshimi Nakazono, Masafumi Uchida, Hisaya Tanaka, and Hideto Ide. "Quantitative Evaluation of the Tactile Sense by ERP." Journal of Robotics and Mechatronics 15, no. 1 (2003): 33–38. http://dx.doi.org/10.20965/jrm.2003.p0033.

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We have developed a method of quantitative evaluation for vibration discrimination by ERP (Event Related Potential). We made a modulation matrix of high-pass component (40-200Hz) and low-pass component (2-20Hz), and gave modulated vibrations to a foretinger by a piezoelectric vibratos We examined ERP differences, which are amplitudes, areas and intervals, between a reference vibration of 2/40Hz and controlled vibrations.

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27

He, Hong Lin, Dong Mei Wu, and Wen Guang Liu. "A Linear Piezoelectric Linear Motor Driven by the in-Plane Longitudinal and Bending Vibrations of an H-Shaped Vibrator." Advanced Materials Research 472-475 (February 2012): 2824–27. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.2824.

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In order to develop theoretical instructions for design of high performance linear motor, a piezoelectric linear motor based on an H-shaped vibrator is proposed, which employed the vibrator’s 2nd bending vibration mode and 1st longitudinal planar vibration to drive the motor in this paper. Firstly, the driving principle of the motor is presented, and the elliptical motion generated on the driving end of the vertical bars of the vibrator is proved. Then, FEM simulation model is built for the vibrator, which is used to calculate the vibrator’s working modes and to execute harmonic response analy

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Oroszi, Tamás, Marieke J. G. van Heuvelen, Csaba Nyakas, and Eddy A. van der Zee. "Vibration detection: its function and recent advances in medical applications." F1000Research 9 (June 17, 2020): 619. http://dx.doi.org/10.12688/f1000research.22649.1.

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Vibrations are all around us. We can detect vibrations with sensitive skin mechanoreceptors, but our conscious awareness of the presence of vibrations is often limited. Nevertheless, vibrations play a role in our everyday life. Here, we briefly describe the function of vibration detection and how it can be used for medical applications by way of whole body vibration. Strong vibrations can be harmful, but milder vibrations can be beneficial, although to what extent and how large the clinical relevance is are still controversial. Whole body vibration can be applied via a vibrating platform, used

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Pal, Anjan. "Design, Analysis & Optimization of Muffler for Four Stroke Petrol Engine Motorcycle." International Journal for Research in Applied Science and Engineering Technology 11, no. 5 (2023): 886–90. http://dx.doi.org/10.22214/ijraset.2023.51692.

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Abstract: Objective: The exhaust pipe is subjected to several stresses, most of which are due to vibration. Particular attention should be given to gas forces which will induce vibration. These vibrations will then induce a fatigue life to the system. It is therefore necessary to study the fatigue behavior of the exhaust pipe by analyzing the vibration modes and the response of vibrations by its sources. Methods: The vibrations of silencer are affecting the performance of silencer and it is uncomfortable to operators. So, it is necessary to analyze the vibrations which would further help to mi

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30

Hubbard, Mont, and Christy D. Bergman. "Effect of Vibrations on Javelin Lift and Drag." International Journal of Sport Biomechanics 5, no. 1 (1989): 40–59. http://dx.doi.org/10.1123/ijsb.5.1.40.

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The theory of crossflow aerodynamics is used to estimate the effect of thrower-induced vibrations on javelin mean lift and drag. Vibrations of all modes increase both lift and drag from the vibration-free condition. Percentage in-creases in lift and drag are largest at small mean angles of attack, large vibrational amplitudes, and large relative wind speeds. Thus the consequences of vibration effects on aerodynamics may be most significant for elite throwers.

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Hrabovský, Leopold, Štěpán Pravda, and Martin Fries. "Sensor Monitoring of Conveyor Working Operation with Oscillating Trough Movement." Sensors 25, no. 8 (2025): 2466. https://doi.org/10.3390/s25082466.

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This paper presents measured vibration magnitudes on the trough surface and on the frame of a laboratory model of a vibrating conveyor, detected by acceleration sensors. The vibration source is a DC asynchronous vibration motor with two discs with unbalanced masses mechanically attached to the end parts of the rotor. The trough of the vibrating conveyor is supported by four rubber springs of two types, which are characterised by considerable spring stiffness. Digital signals were recorded using the DEWESoft SIRIUSi measuring apparatus, which carries information about the magnitude of acting vi

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32

Shimose, Shigeru, Kanjuro Makihara, and Junjiro Onoda. "Comparison of Analog and Digital Self-Powered Systems in Multimodal Vibration Suppression." Smart Materials Research 2012 (February 21, 2012): 1–9. http://dx.doi.org/10.1155/2012/287128.

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This paper compares our analog and digital self-powered systems for vibration suppression, and shows experimental results of multimodal vibration suppression for both self-powered systems. The experimental results are evaluated in light of the damping performance and adaptability under various vibrational conditions. We demonstrate various examples of our innovative vibration suppression method, called “digital self-powered.” Proper status switching of an electric circuit made up of an inductor and a selective switch connected to a piezoelectric transducer attenuates the vibrations. The contro

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33

Jiang, Li, Zhenyue Ma, Jianwei Zhang, Mohd Yawar Ali Khan, Mengran Cheng, and Libin Wang. "Chaotic Characteristic Analysis of Vibration Response of Pumping Station Pipeline Using Improved Variational Mode Decomposition Method." Applied Sciences 11, no. 19 (2021): 8864. http://dx.doi.org/10.3390/app11198864.

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The measured vibrational responses of the pumping station pipeline in the irrigation site were chosen to confirm the chaotic characteristics of the pumping station pipeline vibration and to determine the vibrational excitation that makes it chaotic. First, the chaotic properties of the pipeline vibration responses were investigated using a saturation correlation dimension and the maximum Lyapunov exponent. The vibration excitation with chaotic features was obtained using an improved variational mode decomposition (IVMD) method to examine the multi-time-scale chaotic characteristics of the pipe

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Liang, Hongyu, Zhigang Wu, Jifeng Hu, Yuannan Gan, and Sheng Qiang. "Simulation Test of an Intelligent Vibration System for Concrete under Reinforcing Steel Mesh." Buildings 14, no. 8 (2024): 2277. http://dx.doi.org/10.3390/buildings14082277.

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Concrete vibration construction sustains high labor intensity, a poor working environment, difficulties in quality control, and other problems. Current research on concrete vibration focuses on monitoring vibration quality, evaluating vibration processes quantitatively, and assessing mechanical vibration of unreinforced mesh concrete (plain concrete). Standardizing concrete vibration under reinforcing steel mesh remains difficult. There is still a lag in the evaluation of the quality of rework and the consumption of human and material resources. To tackle these issues, a vibrating robotic arm

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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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Kłosiński, Jacek, Ludwik Majewski, and Arkadiusz Trąbka. "Control of Two-Dimensional Vibrating System." Solid State Phenomena 164 (June 2010): 333–38. http://dx.doi.org/10.4028/www.scientific.net/ssp.164.333.

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A strategy for control of a system of two electrical vibrators mounted onto the vibrating plate of a typical small table vibrator was discussed in the present paper. The aim of the considered control system is rapid positioning of counterbalances for ensuring achievement of the assumed directions of vibrations and loading forces (where , m is unbalanced mass, ω is angular velocity of the vibrator shaft, e is distance between the unbalanced mass and the vibrator rotary axis). The strategy of the control consists in setting of different directions of vibrator rotations together with controlled 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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Li, Shan, Liang Xu, and Yu Qi Wang. "The Research of COMAS Vibrating Conveyor Noise Reduction." Applied Mechanics and Materials 184-185 (June 2012): 583–86. http://dx.doi.org/10.4028/www.scientific.net/amm.184-185.583.

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In a cigarette silk production line of a cigarette factory, the noise of vibrating conveyor not only endangers the health of workers’ listening, but also reduces work efficiency. In this paper, the modal of the frame was analyzed with the ANSYS software. The analysis results show that the frame has torsion vibration and swing. These vibrations will bring adverse effects and noise. Through designing a vibration isolation system on the vibrating conveyor, the reasonableness and effectiveness of the isolation component were proved with static and dynamic analysis of the vibration isolation system

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Tytova, Tamila, Aleksander Shashuryn, Konstantin Buzhynskiy, and Valeriy Svetlov. "Vibrations’ formation and transmission during high-speed trains’ operation." Bulletin of scientific research results, no. 3 (October 17, 2017): 89–95. http://dx.doi.org/10.20295/2223-9987-2017-3-89-95.

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Objective: To determine the mechanisms of vibration’s occurrence and transmission during high-speed trains’ operation. Methods: The occurrence and transmission of vibration is calculated by means of vibration attenuation calculation method, which results from the extension of the vibration wave front in space, ground internal loss and elastic medium wave impedance. Results: Theoretical studies were generally confirmed by the results of experimental studies. Practical importance: Application of the given calculation method of vibration dumping in the early stages of high-speed railway lines con

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Itoh, Shingo, Keigo Tsujita, Taiki Morishige, and Toshihide Takenaka. "The Effect of Vibration Condition for Magnesium Dry Gravity Sorting by Vibrating Particulate Bed." Materials Science Forum 941 (December 2018): 1535–39. http://dx.doi.org/10.4028/www.scientific.net/msf.941.1535.

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Recycling Mg alloys has been demanded as the demand of Mg alloys has been increased. It is difficult to separate Mg with Al because the properties are similar except for the density. In this study, gravity sorting by vibrating particulate bed ajusted the density to intermediate between Mg and Al was applied for Mg separation with Al. The relationship the vibrating condition and the sorting accuracy was investigated by applying different vibration acceleration and by applying the vertical and horizontal vibration. Turbulent flow was observed and the recovery rate was improved when vertical vibr

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Silva, Ricardo Luís Alves, Kleber Gonçalves Bezerra Alves, José Ângelo Peixoto da Costa, et al. "Dynamics of Vibration in Crane Operation: An Elementary Modal and Harmonic Analysis." Processes 13, no. 3 (2025): 610. https://doi.org/10.3390/pr13030610.

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This work aims to study the dynamic aspects related to mechanical vibrations, focusing on vibrational analysis and harmonics concerning safety and maximum efforts supported by operators working with dynamic mechanical equipment. The main goal is the determination of resonance vibrations, displacements, and accelerations at the workstation of a crane operator. A modal and harmonic analysis was performed using the finite element method and the ANSYS software 2022 R1. The findings indicated that the primary vibration modes impacting the operator’s well-being occurred at 1, 2, and 8 Hz, potentiall

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Qin, Bin, Md Mahbub Alam, and Yu Zhou. "Free vibrations of two tandem elastically mounted cylinders in crossflow." Journal of Fluid Mechanics 861 (December 21, 2018): 349–81. http://dx.doi.org/10.1017/jfm.2018.913.

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The paper presents an experimental investigation on the flow-induced vibrations of two tandem circular cylinders for spacing ratio $L/D=1.2{-}6.0$ and reduced velocity $U_{r}=3.8{-}47.8$, where $L$ is the cylinder centre-to-centre spacing and $D$ is the cylinder diameter. Both cylinders are allowed to vibrate only laterally. Extensive measurements are conducted to capture the cylinder vibration and frequency responses, surface pressures, shedding frequencies and flow fields using laser vibrometer, hotwire, pressure scanner and PIV techniques. Four vibration regimes are identified based on the

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Oliinyk, O. Yu. "VIBRATION FREQUENCY DENSITY CONTROL METHOD IN VIBRATION CONDITIONS." METHODS AND DEVICES OF QUALITY CONTROL, no. 2(43) (December 24, 2019): 41–47. http://dx.doi.org/10.31471/1993-9981-2019-2(43)-41-47.

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The use of existing vibration frequency measuring instruments for monitoring technological parameters inside apparatus and equipment is limited due to the presence of vibrations and industrial noise. The lack of data on the use of part of the technological apparatus as flow resonators through the unexplored basic analytical equations for determining the amplitude-frequency characteristics of such resonators determined the direction of these studies. The article is devoted to studies aimed at establishing the relationship between the vibrational field of the resonator, which is used as part of

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Alphin, M. S., J. Paul Chandra Kumar, and B. Jain A. R. Tony. "Biomechanical Response of the Human Foot Model Exposed to Vibrations: A Finite Element Analysis." Journal of Biomaterials and Tissue Engineering 11, no. 11 (2021): 2097–108. http://dx.doi.org/10.1166/jbt.2021.2748.

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Prolonged exposure to mechanical vibration has been associated with many musculoskeletal, vascular and sensorineural disorders of the foot from simple Plantar fasciitis and Achilles Tendonitis to complex ones as Tarsal tunnel syndrome (TTS) and Vibration white feet/toes. Foot-transmitted vibrations (FTV) are exposed to the occupants using vibrating equipment’s or standing on vibrating platforms. Prolonged exposure to foot-transmitted vibrations (FTV) can lead to syndromes like vibration white feet/toes may result in tingling sensation, blanching of the toes and even numbness in the feet and to

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Rahemtulla, Hughes-Riley, and Dias. "Developing a Vibration-Sensing Yarn for Monitoring Hand-Transmitted Vibrations." Proceedings 32, no. 1 (2019): 6. http://dx.doi.org/10.3390/proceedings2019032006.

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Overexposure to hand-transmitted vibrations (HTVs) is a serious concern within industries that use vibrating power tools as HTVs can lead to severe and chronic injuries to the hand-arm system, which are preventable by limiting vibration exposure. This study presents a novel vibration-sensing electronic yarn (E-yarn) that can be used to monitor HTVs at the point-of-entry of the vibrations into the hand. The construction of the vibration-sensing E-yarn is described, with the vibration-sensing E-yarns being fully characterised at each stage of the manufacturing process to understand how the manuf

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Pelmear, P. L., and D. K. N. Leong. "EU Directive on Physical Agents — Vibration." Journal of Low Frequency Noise, Vibration and Active Control 21, no. 3 (2002): 131–39. http://dx.doi.org/10.1260/026309202321164702.

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Vibrations that arouse human health concerns are classified into two main categories: (1) hand-arm vibrations (HAV) and (2) whole-body vibrations (WBV). Hand-transmitted vibration from a power or impact tool affects the upper extremities of the body. WBV affects the entire body and is transmitted from a vibrating seat, bed or floor to a person who is in a sitting, Iying or standing position. The EU Directive April 5, 2002 provides exposure limit and action values for both HAV and WBV. These values have taken into consideration recent advances in knowledge and the political judgment of the Memb

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Trujillo-Franco, Luis Gerardo, Nestor Flores-Morita, Hugo Francisco Abundis-Fong, Francisco Beltran-Carbajal, Alejandro Enrique Dzul-Lopez, and Daniel Eduardo Rivera-Arreola. "Oscillation Attenuation in a Building-like Structure by Using a Flexible Vibration Absorber." Mathematics 10, no. 3 (2022): 289. http://dx.doi.org/10.3390/math10030289.

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This is a theoretical, numerical, and experimental study on the vibration attenuation capability of the dynamic response of a building-like structure using a dynamic vibration absorber in cantilever flexible beam configuration, taking into account gravitational effects associated with its mass. The dynamic model of the primary vibrating structure with the passive vibration control device is obtained using the Euler–Lagrange formulation considering the flexible vibration absorber as a generalized system of one degree of freedom. The application of the Hilbert transform to the frequency response

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BIENIEK, Piotr, Grzegorz KOWALIK, and Karol ŁYSIAK. "Influence of Technological Instruments on the Course of Vibration Tests Carried Out on the Inductor of Vibrations for 120 mm Mortar Cartridges." PROBLEMY TECHNIKI UZBROJENIA 159 (May 16, 2022): 47–71. http://dx.doi.org/10.5604/01.3001.0015.8553.

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The paper deals with a proper selection of technological instruments for fixing 120 mm mortar cartridges into the vibrations inductor at laboratory testing. The work was aimed to find out the influence of modified technological instruments on the course of vibration tests in comparison to an original design which had been changed along with performed trials to take into account the fixation on the vibrations inductor and matching with the tested sample. Aspects connected with the improvement of the technological handle, which is a transitional device between the vibrating system and tested sam

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Shen, Xiaoyan, Jing Yu, Jianlong Yin, and Dongsheng Li. "Experimental Study of See-Saw Mode Nano-Vibration on Orifice-Type Restrictors." Applied Sciences 11, no. 11 (2021): 5265. http://dx.doi.org/10.3390/app11115265.

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Slide stability is key to the aerostatic guide in ultra-precise machines; thus, it has garnered plenty of attention. Macro-scale studies are commonplace, but micro- and nano-vibration issues require more attention. Microscope vibration is mainly caused by tiny changes in the fluid parameters of lubricating gas film, which is complex and has no verdict. In this case, slide-gas interaction should be considered. In this study, the widely used orifice-type restrictor was investigated for its nano-vibration performance. A Comsol finite-element-method fluid–structure interaction model was used to si

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Cieplok, Grzegorz. "Estimation of the resonance amplitude in machines with inertia vibrator in the coast-down phase." Mechanics & Industry 19, no. 1 (2018): 102. http://dx.doi.org/10.1051/meca/2017035.

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The work concerns mechanical systems with transient resonance formed as a result of an unbalanced rotating mass passing through an area of the system's natural frequency. In particular, this concerns over-resonant vibrating machines driven by inertia vibrators, which during start-up and coast-down pass through the natural frequency area related to the vibrating mass – flexible suspension system. The work analyses a system consisting of a soft-mounted machine body excited into vibrations by means of the inertia vibrator in order to designate the amplitude of resonant vibration, taking into cons

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