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Journal articles on the topic 'Sine sweep vibration'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

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1

Hine, M. "Swept Sine Vibration Test Conservatism." Journal of the IEST 38, no. 6 (1995): 13–17. http://dx.doi.org/10.17764/jiet.2.38.6.kt3t17530875g171.

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The excessive overtest associated with the swept sine vibration test method was measured quantitatively using the index of conservatism and the associated overtest factor for a dynamic mass model of a typical spacecraft component. The response to a fixed amplitude sine sweep test was compared with the flight transient vibration environment for sweep rates of 2, 4, and 6 octaves/min and 300 Hz/min. A response-limited test was also conducted at 6 octaves/min. The conservatism was measured using several characterizations; namely: number of peaks exceeding, ranked peaks, shock response spectrum, s

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2

Li, Xiao Lin, and Xia Yan. "Simulation of Sinusoidal Vibration Control Algorithm Based on Hydraulic Vibration Table." Advanced Materials Research 1016 (August 2014): 198–203. http://dx.doi.org/10.4028/www.scientific.net/amr.1016.198.

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In this paper, the model of hydraulic vibration system is established and sinusoidal vibration control algorithm is discussed and studied. A sinusoidal control hydraulic vibration system is designed. By simulation, this system has good frequency response characteristic and sine sweep control function.

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3

Oh, Chang Jun, Hee Nam Choi, and Bong Soo Kang. "Vibration Control of an Electromagnetic Shaker by Sweep Sine Signal." Transactions of the Korean Society of Mechanical Engineers - A 42, no. 7 (2018): 687–92. http://dx.doi.org/10.3795/ksme-a.2018.42.7.687.

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4

Kos, Vanja Pahor, Janko Slavič, and Miha Boltežar. "Fatigue Damage for Sweep-Sine and Random Accelerated Vibration Testing." Advances in Mechanical Engineering 7, no. 2 (2014): 340545. http://dx.doi.org/10.1155/2014/340545.

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5

Dossogne, T., L. Masset, B. Peeters, and J. P. Noël. "Nonlinear dynamic model upgrading and updating using sine-sweep vibration data." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 475, no. 2229 (2019): 20190166. http://dx.doi.org/10.1098/rspa.2019.0166.

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Dynamic modelling is a core activity in mechanical engineering towards supporting system and control design. It is typically carried out in a computational environment, involving idealizing assumptions of diverse kinds. The most notable assumption commonly adopted in the field is the excitation-to-response linearity of the mechanical vibrations. This common practice contrasts with the day-to-day experience of test engineers, who are ever more confronted with nonlinearities when dynamically testing modern mechanical structures. A nonlinear behaviour may result from various physical mechanisms,

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6

Yan, Hui, Liang Chen, Hong Rui Ao, and Hong Yuan Jiang. "The Experimental Research of Vibration Isolation Performance of MR Isolator at High Temperature." Applied Mechanics and Materials 184-185 (June 2012): 525–28. http://dx.doi.org/10.4028/www.scientific.net/amm.184-185.525.

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Transmissibility is the main performance evaluation index of Metal Rubber (MR) isolator, which can be got by sine sweep frequency test. At different temperature, the sine sweep frequency test is done with different structural parameter MR isolator. The influence that relative density and pre-deformation have on transmissibility and natural frequency when temperature changed is analyzed. The changing regularity of MR isolator’s transmissibility at different temperature is explored. Research results provide the basis for designing MR isolator.

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7

Chai, Shao Feng, Ping Wang, Zhi Jian Wu, Jun Wang, and Gao Feng Che. "Acceleration Data Acquisition and Analysis Method of Shaking Table Test." Applied Mechanics and Materials 724 (January 2015): 205–12. http://dx.doi.org/10.4028/www.scientific.net/amm.724.205.

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Shaking table test is an important means of simulated earthquake in laboratory, slope shaking table test data provide a scientific basis for analysis of dynamic stability and instability mechanism of slopes. Sine vibration table test data processing is different from general frequency domain analysis method, need real-time data processing in time domain. Taking the sine sweep test conditions, which is one of the conditions in "Earthquake landslide and slope prevention and control technology research on shaking table test", as an example. Describes the layout of sensors in shaking table test an

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8

Napolitano, Kevin. "METHODS AND APPARATUS FOR VIBRATION TESTING USING MULTIPLE SINE SWEEP EXCITATION." Journal of the Acoustical Society of America 133, no. 4 (2013): 2514. http://dx.doi.org/10.1121/1.4800119.

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9

Palmieri, M., F. Cianetti, G. Zucca, G. Morettini, and C. Braccesi. "Spectral analysis of sine-sweep vibration: A fatigue damage estimation method." Mechanical Systems and Signal Processing 157 (August 2021): 107698. http://dx.doi.org/10.1016/j.ymssp.2021.107698.

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10

Chen, Tao, and Da Wei Zhang. "Development of Vibration Excitation and Control System for High Frequency Application." Applied Mechanics and Materials 246-247 (December 2012): 1283–88. http://dx.doi.org/10.4028/www.scientific.net/amm.246-247.1283.

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A complete system of vibration excitation with force feedback control for piezoelectric inertial exciter is presented. The vibration exciter is constructed and its dynamic model is established composed by piezoelectric stack, inertial mass and pretension institutions based on principle of inertia and reaction. The control system takes software program as the core part. The workflow of the digital step sine sweep control software for exciting force limit is recounted. Variety techniques are utilized to ensure real time and stability in the control process, including synchronization output and a

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11

Haile, William. "Validation of a Simple Formula for Force Limits in Vibration Testing." Journal of the IEST 41, no. 4 (1998): 24–29. http://dx.doi.org/10.17764/jiet.41.4.f8141101x76r62qm.

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A new formula for the limiting force to be used in dual control vibration testing is explored by use of a simple but general-purpose example. The results of the force formula are compared with the exact solution and found to be in excellent agreement. Extrapolation from random vibration to sine sweep testing is included.

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12

Bonato, Marco, and Philippe Goge. "Assessing the Vibration Fatigue Life of Engine Mounted Components." Journal of the IEST 61, no. 1 (2018): 20–30. http://dx.doi.org/10.17764/1098-4321.61.1.20.

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Abstract As part of the design validation of components mounted on rotating machinery such as a car engine, it is essential to understand the environmental stress in which they operate. In the case of vibration loadings, the reliability must be verified according to accelerated tests that realistically reproduce the in-service stress. Indeed, a representative validation profile permits not only the assessment of the component durability, but also provides a reliable reference for design optimization (downsizing), reducing development cycle costs, and time scale. This paper proposes an innovati

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13

Cheng, He Zhang, Shao Yi Hu, and Guang Ping Zou. "Research on Vibration Characteristic of Metal Rubber by Wire Mesh." Applied Mechanics and Materials 633-634 (September 2014): 242–45. http://dx.doi.org/10.4028/www.scientific.net/amm.633-634.242.

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The paper mainly concerns about how relative density and pre-compression quantity of metal rubber shock absorber (MRSA) affect acceleration transmissibility, natural frequency and other parameters of MRSA. In order to study the influence law, sine wave sweep experiment was conducted on different MRSA, and the final data was processed. The influence law could provide reference for practical application of MRSA.

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14

Menyhardt, Karoly, Ramona Nagy, and Remus Stefan Maruta. "Design of Modular Vibration Testing Equipment." Applied Mechanics and Materials 801 (October 2015): 333–37. http://dx.doi.org/10.4028/www.scientific.net/amm.801.333.

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Vibration testing is used by introduction of a force function into system, usually with the use of a shaker or vibration testing machine. These induced vibrations, aid in the laboratory or production floor for a variety of things, proof of concept, standard assessment, fatigue testing, and evaluating performance. Electrodynamic shakers are well suited for most vibration tests and offer several advantages over alternative approaches. Resonance searches involve sine sweep to obtain a transfer function for evaluation of resonance characteristics, usually by a crank mechanism. Fatigue testing is a

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15

Wang, Xiu Gang, Zheng Ji, Jian Su, Xiao Ning Cao, and Meng Meng Li. "Research of Test Method for the Natural Vibration Frequency of Bogie." Advanced Materials Research 503-504 (April 2012): 1050–54. http://dx.doi.org/10.4028/www.scientific.net/amr.503-504.1050.

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In order to determine the，a test bench for the natural vibration characteristics of the bogie suspension was put forward. Firstly the natural vibration characteristics structure composition and the testing principle was introduced, the sine sweep incentive was simulated, and the inverse kinematics solution model and the real-time solution model were developed. The Comparison of the simulation result and the geometric theory results was carried out, proving the accuracy of the inverse kinematics solution model and the simulation model.

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16

Fuellekrug, U., M. Boeswald, D. Goege, and Y. Govers. "Measurement of FRFs and Modal Identification in Case of Correlated Multi-Point Excitation." Shock and Vibration 15, no. 3-4 (2008): 435–45. http://dx.doi.org/10.1155/2008/356087.

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The modal identification of large and dynamically complex structures often requires a multi-point excitation. Sine sweep excitation runs are applied when it is necessary to concentrate more energy on each line of the frequency spectrum. The conventional estimation of FRFs from multi-point excitation requires uncorrelated excitation signals. In case of multi-point (correlated) sine sweep excitation, several sweep runs with altered excitation force patterns have to be performed to estimate the FRFs. An alternative way, which offers several advantages, is to process each sine sweep run separately

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17

Liu, Yan Hui, Ping Tan, Fu Lin Zhou, Yong Feng Du, and Wei Ming Yan. "Vibration Control of Serially Connected Isolation System Using Piezoelectric Actuator." Advanced Materials Research 250-253 (May 2011): 2112–15. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.2112.

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This paper presents a bidirectional piezoelectric actuator, which can be used to vibration control of serially connected isolation System. Firstly, the performance test of this control device was processed. Then vibration control experiment of serially connected isolation system with this control device based on sweep sine shaking table was carried out. The experimental results show that this control device has stable mechanical properties, produces semi-active control force fast and has the outstanding control efficiency for serially connected isolation system. In addition, this control still

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18

Yang, Rui, Dong-Mei Wang, Ning Liang, and Yan-Feng Guo. "Maximum Vibration Transmissibility of Paper Honeycomb Sandwich Structures." International Journal of Structural Stability and Dynamics 19, no. 06 (2019): 1971003. http://dx.doi.org/10.1142/s0219455419710032.

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The maximum vibration transmissibility of paper honeycomb sandwich structures with different sizes of honeycomb core under various static stresses was investigated using the sine frequency sweep test. The effects of the cell length of the honeycomb, the thickness of the sandwich structure, and the static stress on the maximum vibration transmissibility were evaluated and a linear polynomial equation for evaluating the maximum vibration transmissibility was obtained. The results show that the maximum vibration transmissibility increases steadily with the increase in the cell length of the honey

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19

Ibragimov, R. N., S. Bakhtiyarov, and P. Zweigart. "Correlation Between Three-dimensional Sine Sweep Dynamics Vibration Testing and Resonantly Interacting Internal Gravity Wave Field." Mathematical Modelling of Natural Phenomena 12, no. 1 (2017): 62–93. http://dx.doi.org/10.1051/mmnp/201712105.

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20

Guo, Yanfeng, and Jinghui Zhang. "Shock Absorbing Characteristics and Vibration Transmissibility of Honeycomb Paperboard." Shock and Vibration 11, no. 5-6 (2004): 521–31. http://dx.doi.org/10.1155/2004/936804.

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Honeycomb paperboard is a kind of environmental-friendly package cushioning material with honeycomb sandwich structure, and may be employed to protect products from shock or vibration damage during distribution. This paper deals with the characterization of properties of honeycomb paperboard relevant to its application for protective packaging in transportation, such as dynamic cushion curves and vibration transmissibility. The main feature of the paper is the evaluation on the shock absorbing characteristics and vibration transmissibility of honeycomb paperboards with different thickness by a

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21

Chen, Taicong, and Zhou Zhou. "An Improved Vision Method for Robust Monitoring of Multi-Point Dynamic Displacements with Smartphones in an Interference Environment." Sensors 20, no. 20 (2020): 5929. http://dx.doi.org/10.3390/s20205929.

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Current research on dynamic displacement measurement based on computer vision mostly requires professional high-speed cameras and an ideal shooting environment to ensure the performance and accuracy of the analysis. However, the high cost of the camera and strict requirements of sharp image contrast and stable environment during the shooting process limit the broad application of the technology. This paper proposes an improved vision method to implement multi-point dynamic displacement measurements with smartphones in an interference environment. A motion-enhanced spatio-temporal context (MSTC

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22

Belaïd, Marouane, Stéphane Fontaine, Ali El Hafidi, Papa Benoît Piezel, and Papa Birame Gning. "Prediction of Dissipative Properties of Flax Fibers Reinforced Laminates by Vibration Analysis." Applied Mechanics and Materials 822 (January 2016): 411–17. http://dx.doi.org/10.4028/www.scientific.net/amm.822.411.

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This study proposes an experimental-numeric method to identify the viscoelastic properties of flax fibres reinforced composite laminate (flax/epoxide). The used method consists in identifying the evolutions of both loss factor and stiffness when vibrational frequency changes. In this way, several free-free symmetrically guided beams are excited on a dynamic range of 10 to 4000 Hz with sweep sine excitation focused around the 4-first’s modes. Fractional derivative Zener model is used to identify the on-axis ply complex moduli and describe the laminate dissipative linear behavior with the classi

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23

Jeon, Jun Cheol, Jung Woo Sohn, and Seung Bok Choi. "Comparison of Dynamic Signal of MFC and PVDF Sensor: Experimental Investigation." Advanced Materials Research 317-319 (August 2011): 1098–101. http://dx.doi.org/10.4028/www.scientific.net/amr.317-319.1098.

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In this paper, identification of dynamic sensing characteristics of MFC(macro fiber composite) and PVDF(polyvinylidene fluoride) are carried out via experimental investigation. A clamped aluminum beam structure is prepared and experimental setup for beam vibration test is established with shaker system. MFC and PVDF are attached on the top and bottom surface of the beam structure, respectively and connected to data acquisition system. In order to verify the operating bandwidth, frequency responses of the smart beam structure are obtained from 0Hz to 5kHz under sine sweep excitation. For the id

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24

Jiang, C. H., and T. Y. Kam. "Vibration and Sound Radiation Characteristics of Composite Flat-Panel Sound Radiator." Applied Mechanics and Materials 431 (October 2013): 177–81. http://dx.doi.org/10.4028/www.scientific.net/amm.431.177.

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The vibration and sound radiation characteristics of laminated composite flat-panel sound radiators are studied via both theoretical and experimental approaches. In the theoretical study, a finite element model is presented to formulate the forced vibration of the sound radiators. The first Rayleigh integral is used to construct the sound pressure level curve of the sound radiators. In the experimental study, a laminated composite sound radiator was subjected to sweep sine excitation to determine the frequency response spectrum from which the natural frequencies of the sound radiator were iden

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25

Gasparetto, Victor E. L., Marcela Machado, and Sergio H. S. Carneiro. "Experimental Modal Analysis of an Aircraft Wing Prototype for SAE Aerodesign Competition." DYNA 87, no. 214 (2020): 100–110. http://dx.doi.org/10.15446/dyna.v87n214.85833.

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This work presents an experimental modal analysis of an aircraft wing prototype, designed by the Aerodesign team of the University of Brasilia, and performs a ground vibration testing of the prototype. The dynamic response data were acquired using the software LabVIEW, and the modal parameters were identified through the EasyMod toolbox. The modal parameters are characterised for the first seven vibration modes of the structure, with the firsts two being suspension modes of vibration. The effect of small changes in the experimental procedure on the identified modal parameters is discussed. It

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26

Guo, Yanfeng, Wencai Xu, Yungang Fu, and Hongtao Wang. "Dynamic Shock Cushioning Characteristics and Vibration Transmissibility of X-PLY Corrugated Paperboard." Shock and Vibration 18, no. 4 (2011): 525–35. http://dx.doi.org/10.1155/2011/578265.

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X-PLY corrugated paperboard is a new-type corrugated paperboard with three layers of orthotropic corrugated sandwiches structure, and may be employed to protect products from shock or vibration damage during distribution. This article deals with the characterization of properties of X-PLY corrugated paperboard relevant to its application for protective packaging in distribution, such as dynamic cushioning curves, vibration transmissibility and frequency curves. The main feature of article is the evaluation on the dynamic shock cushioning characteristics and vibration transmissibility of X-PLY

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27

Wang, Dong-Mei, and Rui Yang. "Investigation of vibration transmissibility for paper honeycomb sandwich structures with various moisture contents." Mechanics & Industry 20, no. 1 (2019): 108. http://dx.doi.org/10.1051/meca/2019002.

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Vibration transmissibility is an important factor to characterize the vibration absorption performance of cushioning packaging materials during transportation. Reasonable prediction of vibration transmissibility can guide antivibration design and reduce packaging cost. As a kind of green cushioning material, paper honeycomb sandwich structure is widely used in transport packaging because of its good machinability. But at the same time, it also has strong water absorption capacity. To a great extent, the vibration transmissibility of paper honeycomb sandwich structure may be affected by ambient

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28

Reilly, Thomas, Kevin McIntosh, Chris Sensor, and Raman Sridharan. "Structural Testing of High Value Test Articles: Integrated Risk Mitigation in Vibration Test Systems." Journal of the IEST 62, no. 1 (2019): 26–32. http://dx.doi.org/10.17764/1557-2196-62.1.26.

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Abstract Structural testing and model verification are necessities in the development of high-value spacecrafts and components. Testing of such items using electrodynamic shaker systems is meticulously planned to avoid any accidental damage. Similarly, the controller and amplifiers used to drive the shakers must be capable of mitigating risk by safely responding to unplanned vibration excursions during a test, as well as to issues with the test system itself, or with facility resources such as electrical power. For example, what happens if the amplifier power source fails, or the network conne

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29

Pyra, Józef, Maciej Kłaczyński, and Rafał Burdzik. "Analysis on the Possibility of Eliminating Interference from Paraseismic Vibration Signals Induced by the Detonation of Explosive Materials." Sensors 20, no. 21 (2020): 6401. http://dx.doi.org/10.3390/s20216401.

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This article presents the results of studies on the impact of acoustic waves on geophones and microphones used to measure airblasts carried out in a reverberation chamber. During the tests, a number of test signals were generated, of which two are presented in this article: frequency-modulated sine (sine sweep) waves in the 30–300 Hz range, and the result of detonating 3 g of pyrotechnic material inside the chamber. Then, based on the short-time Fourier transform, the spectral subtraction method was used to remove unwanted disruption interfering with the recorded signal. Using MATLAB software,

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30

Hao, Dong, Lin Zhang, Jing Yu, and Daiyong Mao. "Dynamic characteristics of multifunctional structure for spacecraft." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 2 (2017): 679–85. http://dx.doi.org/10.1177/0954410017740384.

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The minimum cost is an important aspect of the spacecraft design. A proposed approach is the multifunctional structure technology, which fully integrates subassemblies and performs both structural and other functions for spacecraft. By combining the structural and functional subsystems into a single unit, the mass and volume savings can be realized. In order to investigate the dynamical properties of the multifunctional structure, which contains viscoelastic components, sine-sweep tests and random vibrations are carried out in present paper. The experimental results show that the multifunction

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31

Csavajda, Péter, and Péter Böröcz. "Effect of Temperature Changes on the Vibration Transmissibility of XPE and PE Packaging Cushioning Material." Applied Sciences 11, no. 2 (2021): 482. http://dx.doi.org/10.3390/app11020482.

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Polyethylene (PE) and its variations are among the most traditional materials used for cushioning in packaging systems. The role of these materials is to prevent damages during handling and distribution processes from physical events such as vibration stress. This study presents new results on the characterization of properties of PE and XPE (cross-linked polyethylene) packaging materials, which have significant relevance as a protective mechanism due to their vibration transmissibility and frequency curve properties. The main goal of this study is the evaluation of vibration transmissibility

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32

Chang, Seongkyu, Weipeng Sun, Sung Gook Cho, and Dookie Kim. "Vibration Control of Nuclear Power Plant Piping System Using Stockbridge Damper under Earthquakes." Science and Technology of Nuclear Installations 2016 (2016): 1–12. http://dx.doi.org/10.1155/2016/5014093.

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Generally the piping system of a nuclear power plant (NPP) has to be designed for normal loads such as dead weight, internal pressure, temperature, and accidental loads such as earthquake. In the proposed paper, effect of Stockbridge damper to mitigate the response of piping system of NPP subjected to earthquake is studied. Finite element analysis of piping system with and without Stockbridge damper using commercial software SAP2000 is performed. Vertical and horizontal components of earthquakes such as El Centro, California, and Northridge are used in the piping analysis. A sine sweep wave is

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33

Sanliturk, K. Y., M. Imregun, and D. J. Ewins. "Harmonic Balance Vibration Analysis of Turbine Blades With Friction Dampers." Journal of Vibration and Acoustics 119, no. 1 (1997): 96–103. http://dx.doi.org/10.1115/1.2889693.

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Although considerable effort has been devoted to the formulation of predictive models of friction damper behavior in turbomachinery applications, especially for turbine blades, the problem is far from being solved due to the complex nonlinear behavior of the contact surfaces. This paper primarily focuses on analytical and numerical aspects of the problem and addresses the problem in the frequency domain while exploring the viability of equivalent time-domain alternatives. The distinct features of this work are: (i) the modelling of nonlinear friction damper behavior as an equivalent amplitude-

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34

Allien, J. Vipin, Hemantha Kumar, and Vijay Desai. "Semi-active vibration control of SiC-reinforced Al6082 metal matrix composite sandwich beam with magnetorheological fluid core." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 234, no. 3 (2019): 408–24. http://dx.doi.org/10.1177/1464420719890374.

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Dynamic characterization of silicon carbide particles reinforced Al6082 alloy metal matrix composite sandwich beam with magnetorheological fluid core is experimentally investigated. The study is focused on determining the effect of magnetorheological fluid core on the dynamic behavior of the sandwich structure. The magnetorheological fluid core is enclosed between the top and bottom metal matrix composite beams. The metal matrix composite beams are cast with silicon carbide particles in Al6082 alloy varying from 0 to 20 wt%. The magnetorheological fluid is prepared in-house and contains 30 vol

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35

Luo, Haitao, Wei Wang, Jia Fu, and Lichuang Jiao. "Finite Element Model Updating of Satellite Sailboard Based on Sensitivity Analysis." Shock and Vibration 2019 (March 21, 2019): 1–12. http://dx.doi.org/10.1155/2019/4547632.

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The modal analysis of a satellite sailboard finite element model is carried out to accurately investigate the response of a satellite sailboard in a complex loaded space environment through simulation. The basic excitation vibration test of the satellite sailboard is used to perform model matching and a correlation test. Appropriate design variables are selected through sensitivity analysis. Modal analysis data and vibration table excitation test response data are used to modify the finite element model. After optimization, the orthogonality of the simulated vibration mode and experimental vib

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36

Li, Shiqi, and Tianyang Ma. "Dynamic performance fluctuation of solid-lubricated rotating mechanism for intermittent operation caused by launch vibration load." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 232, no. 4 (2017): 401–14. http://dx.doi.org/10.1177/1350650117716371.

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Space mechanism is the key to success of long-term space missions. The service life of solid-lubricated space mechanisms is affected by various mechanical loads before in-orbit operation, among which the load caused by the launch vibration is the most severe one. Dynamic performance is an indication of the operating state of solid-lubricated mechanisms. The fluctuation of dynamic performances caused by the load of launch vibration is an unanswered but important question. In this paper, the fluctuation of dynamic performances of solid-lubricated rotating mechanisms for intermittent operation wa

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37

Shaik, Jakeer Hussain, and K. Ramakotaiah. "Designing of milling tool spindle." Bangladesh Journal of Scientific and Industrial Research 53, no. 3 (2018): 191–98. http://dx.doi.org/10.3329/bjsir.v53i3.38265.

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Analysis of chatter stability in an end milling process is quite cumbersome because of the inaccurate knowledge in the spindle’s geometrical design, position of the bearings and several issues related to the spindle structure. The effective position of bearings of the spindle plays a key role in investigating the self-excited chatter vibrations, which requires an accurate transfer function at the most flexibility region of the spindle tool structure. The present work focuses on the development of a novel method of measuring the spindle vibration responses experimentally using sine sweep tests

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38

Toya, Teruki, Peter Birkholz, and Masashi Unoki. "Measurements of Transmission Characteristics Related to Bone-Conducted Speech Using Excitation Signals in the Oral Cavity." Journal of Speech, Language, and Hearing Research 63, no. 12 (2020): 4252–64. http://dx.doi.org/10.1044/2020_jslhr-20-00097.

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Purpose Psychoacoustical studies on transmission characteristics related to bone-conducted (BC) speech, perceived by speakers during vocalization, are important for further understanding the relationship between speech production and perception, especially auditory feedback. For exploring how the outer ear part contributes to BC speech transmission, this article aims to measure the transmission characteristics of bone conduction focusing on the vibration of the regio temporalis (RT) and sound radiation in the ear canal (EC) due to the excitation in the oral cavity (OC). Method While an excitat

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39

Käsgen, Johannes, and Dirk Mayer. "Vibration Based Damage Diagnosis of an Aircraft Structure Using Piezoelectric Transducers." Applied Mechanics and Materials 7-8 (August 2007): 295–300. http://dx.doi.org/10.4028/www.scientific.net/amm.7-8.295.

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This paper presents a practical approach for health monitoring of an aircraft fuselage using vibration measurements with piezoelectric transducers. For the test specimen, a fuselage element of an Airbus A320, the feasibility of health monitoring of stringers, frames and panels, is studied. The proposed structural health monitoring (SHM) system consists of three major components: vibration measurement, signal processing and damage diagnosis. By using applied piezoelectric patch actuators, flexural waves are excited which propagate along the monitored component. The used signal for the actuator

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40

Drygala, Izabela Joanna, and Joanna Maria Dulinska. "Full-Scale Experimental and Numerical Investigations on the Modal Parameters of a Single-Span Steel-Frame Footbridge." Symmetry 11, no. 3 (2019): 404. http://dx.doi.org/10.3390/sym11030404.

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In this work, an examination on the modal properties of a single-span steel-frame footbridge is presented. The footbridge is situated in Jawornik (Lesser Poland). The footbridge is symmetrical since its main structure consists of two steel frames of the same shape. The boundary conditions for both frames are the same as well. The study was completed on the basis of numerical as well as experimental investigations. For finite element (FE) analysis, a 3-D model of the single-span steel-frame footbridge was created. For the experimental study, a research scheme for in situ tests was developed. Th

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Li, FS, Q. Chen, and JH Zhou. "Experimental study on the dynamic properties of the dual-chamber solid and liquid mixture vibration isolator." Journal of Vibration and Control 24, no. 22 (2018): 5302–11. http://dx.doi.org/10.1177/1077546317751563.

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The dual-chamber solid and liquid mixture (SALiM) isolator exhibits multiple stiffness and damping properties with various parameters. As a passive isolation device, the dual-chamber SALiM isolator can also obtain a variable stiffness property by substituting the valve with an active throttle device. Before that, the dynamic properties of the isolator need to be further investigated. Sine sweep tests under different valve openings were implemented to analyze the frequency response characteristics of the system. Two hydro pressure sensors were added into the two chambers to record the pressure

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Ahmad, Nazeer, R. Ranganath, and Ashitava Ghosal. "Modeling of the coupled dynamics of damping particles filled in the cells of a honeycomb sandwich plate and experimental validation." Journal of Vibration and Control 25, no. 11 (2019): 1706–19. http://dx.doi.org/10.1177/1077546319837584.

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Equipment panels of a spacecraft are made up of a sandwich composite with aluminum face sheets and a honeycomb (HC) core. The HC sandwich plate responds to the launch vibration loads subjecting the equipment mounted on it to a high level of accelerations at resonances owing to a lower natural damping. Damping particles (DPs) when inserted in the empty cells of a HC core improve the damping characteristics and reduce the resonance responses. In this work, we present a mathematical model governing the motion of the cell walls, DPs and HC plate under dynamic loading. The discrete element method (

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Liu, Bin, Zhiwei Luo, and Tie Gang. "Influence of low-frequency parameter changes on nonlinear vibro-acoustic wave modulations used for crack detection." Structural Health Monitoring 17, no. 2 (2017): 218–26. http://dx.doi.org/10.1177/1475921716689385.

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The use of vibro-acoustic modulation is an effective nonlinear and nondestructive approach to the detection and monitoring of cracks in fatigued, defective, and fractured materials. However, the vibro-acoustic modulation results strongly depend on choice of the testing parameters. To implement this technique for additional applications, the effect of variation in the test parameters must be well understood. This study investigates the influence of variation in the amplitude and frequency of pumping (low-frequency vibration) signals on the modulation. We apply two kinds of probing excitations,

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Villeneuve, Eric, Christophe Volat, and Sebastian Ghinet. "Numerical and Experimental Investigation of the Design of a Piezoelectric De-Icing System for Small Rotorcraft Part 2/3: Investigation of Transient Vibration during Frequency Sweeps and Optimal Piezoelectric Actuator Excitation." Aerospace 7, no. 5 (2020): 49. http://dx.doi.org/10.3390/aerospace7050049.

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The objective of this research project is divided in four parts: (1) to design a piezoelectric actuator based de-icing system integrated to a flat plate experimental setup, develop a numerical model of the system and validate experimentally; (2) use the experimental setup to investigate actuator activation with frequency sweeps and transient vibration analysis; (3) add an ice layer to the numerical model, predict numerically stresses at ice breaking and validate experimentally; and (4) implement the concept to a blade structure for wind tunnel testing. This paper presents the second objective

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Meeus, Hans, Björn Verrelst, David Moens, Patrick Guillaume, and Dirk Lefeber. "Experimental Study of the Shaft Penetration Factor on the Torsional Dynamic Response of a Drive Train." Machines 6, no. 3 (2018): 31. http://dx.doi.org/10.3390/machines6030031.

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Typical rotating machinery drive trains are prone to torsional vibrations. Especially those drive trains that comprise one or more couplings which connect the multiple shafts. Since these vibrations rarely produce noise or vibration of the stationary frame, their presence is hardly noticeable. Moreover, unless an expensive torsional-related problem has become obvious, such drive trains are not instrumented with torsional vibration measurement equipment. Excessive levels can easily cause damage or even complete failure of the machine. So, when designing or retrofitting a machine, a comprehensiv

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Fraas, Arthur P. "Using Vibrations in Fluidized Beds." Mechanical Engineering 120, no. 01 (1998): 76–79. http://dx.doi.org/10.1115/1.1998-jan-7.

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This article focuses on processes that do not require a high flow rate of sweep gas; the complex-mode vibration-fluidized bed offers lower power needs, attrition rates, and elutriation rates than gas-fluidized beds or rotary kilns. The fluidized solids are induced to flow horizontally by inclining the trough and/or axis of vibration downward in the direction of solids flow. When viewing the operating region through a window in the side wall, the particles in the bed move in unison, like a column of marching soldiers. In light of the complexities and uncertainties in the interaction of adjacent

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Su, Wei-Jiun, and Zong-Siang Wang. "Development of a Non-Linear Bi-Directional Vortex-Induced Piezoelectric Energy Harvester with Magnetic Interaction." Sensors 21, no. 7 (2021): 2299. http://dx.doi.org/10.3390/s21072299.

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In this study, magnetic force is introduced to the design of a bi-directional U-shaped piezoelectric energy harvester for vortex-induced vibrations. The theoretical model of the beam structure is derived based on the Euler–Bernoulli beam theory. The vortex-induced vibration and the non-linear magnetic force are modeled according to the Rayleigh oscillator and the charge model, respectively. A prototype is fabricated and tested in two orthogonal directions under vortex-induced vibrations in a wind tunnel. Up and down wind-speed sweeps are carried out to investigate the non-linear responses of t

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Rébillat, M., K. Ege, M. Gallo, and J. Antoni. "Repeated exponential sine sweeps for the autonomous estimation of nonlinearities and bootstrap assessment of uncertainties." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 230, no. 6 (2015): 1007–18. http://dx.doi.org/10.1177/0954406215620685.

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Measurements on vibrating structures has been a topic of interest for decades. Vibrating structures are however generally assumed to behave linearly and in a noise-free environment, which is not the case in practice. This paper provides a methodology that allows for the autonomous estimation of nonlinearities and assessment of uncertainties by bootstrap on a given vibrating structure. Nonlinearities are estimated by means of a block-oriented nonlinear model approach based on parallel Hammerstein models and on exponential sine sweeps. Estimation uncertainties are simultaneously assessed using r

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Stewart, D. B., and M. R. Seman. "The development and initial field trials of a new high frequency seismic vibrator." Exploration Geophysics 20, no. 2 (1989): 163. http://dx.doi.org/10.1071/eg989163.

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The cost of shot hole drilling is often more expensive than using vibratory energy sources in high resolution seismic surveying. However, such costs are often accepted since conventional vibrators cannot always provide the extreme imaging capacity required in high resolution work. Conventional seismic vibrators sweep in a range from 5 Hz to 250 Hz ? the range of which is limited by the vibrator. The impulse train of the high resolution wacker used by the MiniSOSIE1 system is also band limited, causing a reduction in imaging resolution. The ideal solution is to sweep a broad range of frequencie

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Chiu, Yi Jui, and Chia Hao Yang. "The Dynamic Analysis of the Tennis Racket with the Ball Impact in the Different Area." Applied Mechanics and Materials 201-202 (October 2012): 701–6. http://dx.doi.org/10.4028/www.scientific.net/amm.201-202.701.

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Have a large population because of being engaged in tennis, impact in ball and bat in the energy transfer produced, only some energy is changed into the kinetic energy that the ball rebounded, other energy will be consumed in the vibration of the ball, network thread and frame, among them the arm that the vibration of the frame certainly will be held bat by the human body is absorbed, load to cause arm produce tired to injure, certainly will absorb through bat transmission of bar by human body even, excessive load, cause arm weariness and strain, it is thereupon production to injure, probing i

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