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Dissertations / Theses on the topic 'Degree of vibration'

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Published: 7 June 2025
Last updated: 16 July 2025

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1

Tarvainen, Josefine. "Improved failure detection with higher degree of statistical confidence." Thesis, KTH, Maskinkonstruktion (Inst.), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-183518.

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This master thesis has been performed by a request from Scania CV AB in Södertälje. Scania CV AB is a global company manufacturing heavy vehicles, such as busses and trucks. When developing a gearbox, an endurance test is made that shows failures, such as damaged gears or bearings. STP and delta-ANALYSER are used to discover this kind of failure. STP is developed by Scania CV AB, and it measures the vibration, oil pressure, temperature, etc. delta-ANALYSER is developed by Reilhofer. It is a measuring system that detects failures in the gearbox by comparing the vibrations with a reference. The
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2

Harris, Anthony Frederick. "Multi-Degree of Freedom Passive and Active Vibration Absorbers for the Control of Structural Vibration." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/9693.

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This work investigates the use of multi-degree of freedom (MDOF) passive and active vibration absorbers for the control of structural vibration as an improvement to conventional single degree of freedom (SDOF) vibration absorbers. An analytical model is first used to compare passive two degree of freedom (2DOF) absorbers to SDOF absorbers using point impedance as the performance criterion. The results show that one 2DOF absorber can provide the same impedance at two resonance frequencies as two SDOF absorbers for equal amounts of total mass. Experimental testing on a composite cylindrical shel
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3

YU, BO. "NONLINEAR DYNAMICS OF CABLE GALLOPING VIA A TWO-DEGREE-OF-FREEDOM NONLINEAR OSCILLATOR." OpenSIUC, 2016. https://opensiuc.lib.siu.edu/dissertations/1245.

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The galloping vibrations of a single transmission cable that may vibrate transversely and torsionally has been investigated via a two-degree-of-freedom oscillator. The analytical solutions of periodic motions for this two-degree-of-freedom system are represented by the finite Fourier series. The analytical bifurcation trees of periodic motions to chaos of a transmission line under both steady and unsteady flows are discussed from the generalized harmonic balance method. The analytical solutions for stable and unstable periodic motions in such a two degree-of-freedom system are achieved, and th
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4

Chong, Yon-Ho. "Non-linear vibration analysis techniques for multi-degree-of-freedom systems." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313961.

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5

Zainal, Mohd Shafiq Sharhan bin. "Simulation and experimental study for vibration analysis on rotating machinery." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-19769.

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This student thesis aims to analyze the unbalance on rotating machinery by simulation and experimental. The machinery flywheel rotation is modelled as a Single Degree of Freedom (SDOF) and Multi Degree of Freedom (MDOF) system. The model rotation unbalance is simulated by MATLAB. Then the vibration measurement is taken by experimental. In addition, the tachometer is used to determine the flywheel speed calibration. Finally, the rotating unbalance reduction simulation is performed with different parameter value to determine an optimum level of machinery rotation vibration. Unbalance on rotating
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6

Zaman, Mohammad Faisal. "Degree-per-hour mode-matched micromachined silicon vibratory gyroscopes." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/28168.

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Thesis (M. S.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2008.<br>Committee Chair: Dr. Farrokh Ayazi; Committee Member: Dr. Mark G. Allen; Committee Member: Dr. Oliver Brand; Committee Member: Dr. Paul A. Kohl; Committee Member: Dr. Thomas E. Michaels.
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7

Hein, Travis Lee. "The development of a three-degree-of-freedom vibration control system test facility." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/38013.

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8

Agnes, Gregory Stephen. "Performance of Nonlinear Mechanical, Resonant-Shunted Piezoelectric, and Electronic Vibration Absorbers for Multi-Degree-of-Freedom Structures." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/30740.

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Linear vibration absorbers are a valuable tool used to suppress vibrations due to harmonic excitation in structural systems. Limited evaluation of the performance of nonlinear vibration absorbers for nonlinear structures exists in the current literature. The state of the art is extended in this work to vibration absorbers in their three major physical implementations: the mechanical vibration absorber, the inductive-resistive shunted piezoelectric vibration absorber, and the electronic vibration absorber (also denoted a positive position feedback controller). A single, consistent, physically
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9

MARTINI, SIMONE. "Numerical investigation of one-degree-of-freedom vortex-induced vibration of a rigid circular cylinder." Doctoral thesis, Università degli Studi di Trieste, 2020. http://hdl.handle.net/11368/2973221.

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Le vibrazioni indotte dal fenomeno di distacco di vortici (VIV, Vortex-Induced Vibration) su un cilindro rigido a sezione, circolare montato elasticamente con un grado di libertà sono state simulate numericamente. Il sistema meccanico considerato è caratterizzato da un basso rapporto di massa e un basso rapporto di smorzamento. Nello studio è stata presa in considerazione un’ampia gamma di regimi di velocità del flusso incidente, corrispondenti a un numero di Reynolds subcritico. Il distacco di vortici generato a valle da un cilindro è stato simulato numericamente tramite gli approcci U
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10

Cinarel, Dilara. "Vibration Isolation Of Inertial Measurement Unit." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614069/index.pdf.

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Sensitive devices are affected by extreme vibration excitations during operation so require isolation from high levels of vibration excitations. When these excitation characteristics of the devices are well known, the vibration isolation can be achieved accurately. However, it is possible to have expected profile information of the excitations with respect to frequency. Therefore, it is practical and useful to implement this information in the design process for vibration isolation. In this thesis, passive vibration isolation technique is examined and a computer code is developed which would
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11

Owen, Gregory J. "The influence of whole body vibration on knee extensor stiffness and functional performance a thesis submitted to Auckland University of Technology in partial fulfilment of the degree of Master of Health Science, February 2004." Full thesis. Abstract, 2004. http://puka2.aut.ac.nz/ait/theses/OwenG.pdf.

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12

Au, Pui Ming. "Vibration of branched circular cylindrical shells as applied to airway walls a thesis submitted to Auckland University of Technology in fulfilment of the requirement for the degree of Doctor of Philosophy, March 2005." Full thesis. Abstract, 2005.

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13

畔上, 秀幸, Hideyuki Azegami, 昭慶 沖津, Akiyoshi Okitsu, 和之 備前 та Kazuyuki Bizen. "指数ウィンドウを用いたモードパラメータ同定法の提案". 日本機械学会, 1988. http://hdl.handle.net/2237/7231.

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14

Ahmed, Abu Hanieh. "Multi degrees of freedom vibration isolation." Doctoral thesis, Universite Libre de Bruxelles, 2001. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211553.

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15

Moradi, Pour Parviz. "An improved modal strain energy method for bridge damage identification." Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/201001/1/Parviz_Moradi%20Pour_Thesis.pdf.

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This thesis improved a modal strain energy (MSE) based damage detection method to detect the damage in bridges. Firstly, an elemental MSE and a sensitivity matrix were mathematically established. Then, it was numerically and experimentally tested on some models such as a fixed-end beam, a three-story frame, the 4-DOF three-story structure of Los Alamos National Laboratory and the I-40 Bridge in New Mexico as a real bridge. The results showed the capability of the proposed method. The research findings will contribute to academic studies and bridge industry to minimize the loss of lives and pro
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16

Huang, Ming-Sheng. "Coupled elastic rotor/body vibrations with inplane degrees of freedom." Diss., Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/12495.

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17

Penn, James Douglass. "A Multiple Degree of Freedom Actuator using a single vibrating transducer." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74908.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 127-129).<br>Multiple degree of freedom actuation typically requires one actuator for each degree of freedom, where each actuator requires its own heavy and expensive transducer to transform an electrical input signal into a useful mechanical output. Mechanisms can be used to split the output of a single motor, but the resulting systems are often complex, large, heavy, and noisy. Some also lack true independence of ou
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18

Tadros, Nader Nabil Aziz. "Structural damage detection using ambient vibrations." Thesis, Kansas State University, 2014. http://hdl.handle.net/2097/18178.

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Master of Science<br>Department of Civil Engineering<br>Hani G. Melhem<br>The objective of this research is to use structure ambient random vibration response to detect damage level and location. The use of ambient vibration is advantageous because excitation is caused by service conditions such as normal vehicle traffic on a highway bridge, train passage on a railroad bridge, or wind loads on a tall building. This eliminates the need to apply a special impact or dynamic load, or interrupt traffic on a bridge in regular service. This research developed an approach in which free vibration of a
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19

Pasco, Yann. "Étude physique d'un actionneur piézoélectrique multi-couches non-linéaire et applications à l'absorption active des vibrations déterministes sur 1 puis 6 degrés de liberté." Sherbrooke : Université de Sherbrooke, 2002.

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20

Marchand, Paul. "Investigation of the C(2) parameter of force limited vibration testing for multiple degrees-of-freedom systems." Thesis, University of Ottawa (Canada), 2007. http://hdl.handle.net/10393/27534.

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The semi-empirical method of force-limited vibration testing is used in the aerospace industry to avoid over-testing. The semi-empirical method specifies the maximum interface force based on a single parameter, often referred to as C2, which is based on previous experience with similar structures. This thesis investigates the factors influencing the value of C2 associated with semi-empirical force limited vibration testing. First, a base excited two degrees-of-freedom system is examined in context of the semiempirical method. Then, the effect of different types of damping is investigated. The
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21

DeVlaminck, James Raymond. "Extracting the Rotational Degrees of Freedom From a Reconstructed Three-Dimensional Velocity Field Along With an Analytical Demonstraton and a Proposed Method for Experimental Verification." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/34173.

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A theoretical method for extracting the rotational degrees of freedom from a reconstructed three-dimensional velocity field has been developed. To extract the angular velocities the curl of the translational velocities must be performed. The three-dimensional velocity field is to be equally spaced so that the DFT-IDFT technique of taking partial derivatives of the translational velocities is used. A program was written in C along with MATLAB® which performed the theoretical calculations. Two proposed methods of experimentally verifying the angular velocity data is developed using a Kistle
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Pandiya, Nimish. "Design and Validation of a MIMO Nonlinear Vibration Test Rig with Hardening Stiffness Characteristics in Multiple Degrees of Freedom." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504879018436068.

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23

Budiwantoro, Bagus. "Identification temporelle des structures linéaires et non linéaires." Ecully, Ecole centrale de Lyon, 1990. http://www.theses.fr/1990ECDL0033.

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L'identification temporelle des structures linéaires vise à déterminer les paramètres modaux d'un système dynamiques par la connaissance des signaux d'excitations et des réponses. Les méthodes d'identification dans le domaine temporel utilisent soit des reponses forcées, qui permettent la construction des fonctions des fonctions de transfert, soit les reponses libres, qui facilitent la recherche des modes normaux. En régime force, les fréquences propres et les facteurs d'amortissements sont extraits des fonctions de transfert comme étant les pôles de fractions rationnelles alors qu'en regime l
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Steinbach, Joerg. "Quantized motion of trapped ions." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313334.

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25

Galloway, Christopher. "Non-radiative processes and vibrational pumping in surface-enhanced raman scattering : a thesis submitted to the Victoria University of Wellington in fulfilment of the requirements for the degree of Doctor of Philosophy in Physics /." ResearchArchive@Victoria e-Thesis, 2010. http://hdl.handle.net/10063/1244.

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26

Habineza, Didace. "Stratégies de modélisation et de commande des microsystèmes piézoélectriques à plusieurs degrés de liberté." Thesis, Besançon, 2015. http://www.theses.fr/2015BESA2054/document.

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Les actionneurs piézoélectriques font partie des outils les plus utilisés dans les applications à l'échelle micro/nano-métrique (micromanipulation, microassemblage, micropositionnement, etc…). Du point de vue fonctionnel, on distingue les actionneurs mono-axe (permettant d'obtenir la déflection suivant une direction) et les actionneurs multi-axes (pouvant fléchir suivant plusieurs directions). La notoriété des actionneurs piézoélectriques est due à un certain nombre de performances telles qu'une large bande passante (plus du kHz possible), une très bonne résolution (de l'ordre du nanomètre), u
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Pasco, Yann. "Étude physique d'un actionneur piézoélectrique multi-couches non-linéaire et applications à l'absorption active des vibrations déterministes sur 1 puis 6 degrés de liberté." Thèse, Université de Sherbrooke, 2002. http://savoirs.usherbrooke.ca/handle/11143/1727.

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L'environnement entourant un mécanisme de précision est la principale cause de son mauvais fonctionnement ou tout simplement de ses limitations dans la précision des résultats obtenus. Notre entrée dans l'ère des nanotechnologies nous pousse à concevoir des dispositifs aptent [i.e. aptes] à isoler ces mécanismes de leur environnement afin d'en améliorer le fonctionnement. Le sujet de cette thèse est l'étude, la caractérisation et la conception d'un dispositif d'isolation actif des vibrations utilisant la technologie piézoélectrique. Pour ce faire, l'utilisation d'une plateforme active à plusie
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28

Budinger, Marc. "Contribution à la conception et à la modélisation d'actionneurs piézoélectriques cylindriques à deux degrés de liberté de type rotation et translation." Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2003. http://tel.archives-ouvertes.fr/tel-00864606.

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Ce travail de thèse porte sur le développement et la modélisation d'actionneurs piézo-électriques à densité d'efforts élevés et pouvant produire des mouvements de rotation et de translation. Une étude comparative des différentes structures d'actionneurs a mis en évidence le potentiel électromécanique intéressant de l'actionneur cylindrique à rotation de mode. Une étude approfondie de ce dernier a été entreprise et a permis de le modéliser analytiquement par des schémas de Mason ou par des méthodes variationnelles. Cette dernière approche a permis également de retrouver les paramètres électromé
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29

Chiang, Chin-Bin, and 江志彬. "Vibration Control for Multi-Degree-of-Freedom Flexible Structural system." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/06015194958808703123.

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碩士<br>清雲科技大學<br>機械工程所<br>101<br>Since the flexible structures have the property of light weight and large dimensions, these structures normally demonstrate very low damping ratios and relatively low natural frequencies. As the result of the flexibility of elements of the structure, undesirable residual vibration may occur. Such residual vibration problems will affect the positional accuracy of the system, thereby increasing the settling time to achieve the purpose of work. Previous studies for vibration suppression of truss type plate are only deal with single-axis motion. Thus, the
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Hsu, Ting-Jui, and 許庭瑞. "Study on Degree of Nonlinearity to Performance of Bi-stable Vibration Absorber." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/92676040284656516488.

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碩士<br>國立中興大學<br>機械工程學系所<br>105<br>Bi-stable vibration absorber is a kind of nonlinear vibration absorber which can suppress the vibration of host structure under the external excitation. The attachment in the nonlinear absorber may present “mono-stable”, “chaos” or “snap-through” behaviors when the external excitation is under the specific force and frequency range. In order to quantify the performance of the system in each state, the degree of nonlinearity is an important index for evaluating this system. The degree of nonlinearity can be imagined as the average magnitude of the instantane
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Hsiao, Pei-Hsien, and 蕭霈嫻. "Adaptive Control of A Two-Degree-of-Freedom Rotational Pendulum Vibration Absorber." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/81417436737604022324.

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碩士<br>國立雲林科技大學<br>機械工程系碩士班<br>99<br>In this thesis we study how to suppress vibrations on flexible structures subject to a periodic disturbance using a two-DOF rotational pendulum vibration absorber. The vibration absorber is coupled to the primary structure through a mechanical spring. The characteristic frequencies of the absorber can be tuned dynamically by adjusting the rotational speed of a brushless motor. When the disturbance frequency and the pendulum&apos;&apos;s characteristic frequency are the same, the flexible structure’s vibration will be minimized. To make the vibration absorber
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32

Chen, Po-Han, and 陳柏翰. "A Study of The Two-Dimensional Three-Degree-of-Freedom Nonlinear Vibration System." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/47195233019965570810.

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碩士<br>淡江大學<br>航空太空工程學系碩士班<br>95<br>There has been a long history in research and development of structural vibration worldwide. In early stage, scholars only emphasized on the design of the structure. With the improvement of technologies, bridges and buildings are more complex today. Aerodynamics and fluid mechanics are also incorporated into the design for further studies. The Newton’s second law is used to analyze a system of nonlinearly vibrational rigid body, doing pitching and plunging in conjunction with an unsteady nonlinear aerodynamic force and an absorber. The cubic spring is em
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CHANG, J. Y., and 張嘉彥. "Vibration Analysis of Beam with a Two Degree-of-Freedom Spring- Mass System." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/92555829233815056851.

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碩士<br>國立中興大學<br>應用數學系<br>84<br>In this paper, the natural frequencies and mode shapes of a Bernoulli-Euler beam with a two degree-of-freedom spring-mass system are determined by using Laplace transform with respect to the spatial variable, and the deterministic and random vibration responses of the beam are obtained by using modal analysis. The various spring constantsof boundary conditions are considered to model those special structuresand machines, also defferent parameters of spring-mas
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Zhu, Tao. "Six degree of freedom active vibration isolation using quasi-zero stiffness magnetic levitation." Thesis, 2014. http://hdl.handle.net/2440/85036.

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Vibration is recognised as one of the most significant disturbances to the operation of mechanical systems. Many traditional vibration isolator designs suffer from the trade-off between load capacity and isolation performance. Furthermore, in providing sufficient stiffness in the vertical direction to meet payload weight requirements, isolators are generally overly stiff in the remaining five degrees of freedom (DOF). In order to address the limitations of traditional isolator designs, this thesis details the development of a 6-DOF active vibration isolation approach. The proposed solution is
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Conceição, Pedro Daniel dos Santos. "Numerical simulation of two-degree-of-freedom vortex induced vibration in a circular cylinder with OpenFOAM." Master's thesis, 2016. http://hdl.handle.net/10362/22139.

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Computational fluid dynamics tools are capable to simulate the influence of a fluid flow passing around an object. The ability to predict the impact of such flows on a specific product performance is time consuming and costly without some form of simulation tool. In fact, across a wide range of engineering areas, virtual development allows the reduction of the number of prototypes and less testing until a product is ready to the market. Therefore, it is important to provide computational fluid dynamics users with easy-to-use, robust, time-efficient and validated processes. Bearing this i
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黃正明. "The vibration behavior of sign-degree-of-freedom smoothing and bilinear viscous-elastoplastic oscillators under sinusoidal loadings." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/47463528007431011608.

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碩士<br>國立海洋大學<br>機械與輪機工程學系<br>90<br>Abstract In this paper a more concise formulation of perfectly elastoplastic model is presented and the dynamic responses of the single-degree-of-freedom (SDOF) viscous-elastoplastic structure under external loading is treated and the exact solutions of the responses are derived for periodic loading. We use a new phase-plane estimation method, which can calculate the steady-state responses of structures under sinusoidal loading. We also compare the estimated results with the exact results calculated by the exact time-marching solutions. We confir
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Chen, Tsung-Jen, and 陳宗壬. "Free Vibration Aanlysis of Beams Carrying a Number of Two-Degree-of-Freedom Spring-Damper-Mass Systems." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/49989583447874822024.

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碩士<br>國立高雄海洋科技大學<br>輪機工程研究所<br>99<br>This paper presents a technique to replace a two-degree-of-freedom (two-dof) spring-damper-mass (SDM) system by a set of effective masses, so that one may obtain the natural frequencies of a beam carrying any number of elastically mounted two-dof lumped masses from the same beam carrying a number of rigidly attached effective masses. Due to the existence of damping, the characteristic equation is in the form of complex numbers. Instead of the conventional approach of using both the real part and the imaginary part of an eigenvalue (Rω±Ii), this paper direct
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Jack, Robert Joel. "INVESTIGATING WHOLE-BODY VIBRATION INJURIES IN FORESTRY SKIDDER OPERATORS: COMBINING OPERATOR VIBRATION EXPOSURES AND POSTURES IN THE FIELD WITH BIODYNAMIC RESPONSES IN THE LABORATORY." Thesis, 2012. http://hdl.handle.net/10214/3284.

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The purpose of this thesis was to investigate potential links between trunk stiffness, vibration transmission and whole-body vibration (WBV) injuries. The investigation was comprised of field and laboratory studies. Tri-planar trunk postures, operator injury histories and 6-degree-of-freedom (DOF) vibration exposure data were collected from eight forestry skidders during normal field operations in Northern Ontario. Using this skidder posture and vibration exposure data, the laboratory investigation examined interactions between WBV exposure levels and spectra, seated trunk postures, trunk musc
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HE, RUI-GUANG, and 何瑞光. "Applications of acoustic vibration technique to evaluate loosening of total hip prosthesis and degree of bone fracture healing." Thesis, 1987. http://ndltd.ncl.edu.tw/handle/53753460299644049573.

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Wu, Yun-Peng, and 吳運鵬. "Three-degree-of-freedom system of linear vibration of blade bending and fluttering of vertical axis wind turbines." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/10149293309873164243.

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碩士<br>國立臺灣大學<br>應用力學研究所<br>100<br>Compared to horizontal axis wind turbines, vertical axis wind turbines have the benefit of operation that is independent of the wind direction, lower wind speed to start operation, and less noise. The vibration of blade can be regarded as vibration of a beam. How to support the ends of the beam affect the vibration very much. In this present paper, we start from the energy method of Hamilton’s principle, derive the dynamic governing equations for the blade, which has three degree of freedom (includes bending and fluttering). The key variable to keep the three
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Tang, Ya-Ming, and 湯雅茗. "Development of a System for Measuring Knee Joint Vibration Signals and Analysis of Osteoarthritis Degree of Knee Joints." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/09673860573567935812.

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碩士<br>義守大學<br>生物醫學工程學系<br>102<br>Analysis of the orthopedic clinic diseases shows that there are two-thirds of orthopedic patients with the knee degeneration or lesions. Therefore, how to diagnose the degeneration of knee joint in time is very important and urgent. The purpose of the thesis was to develop a wireless measuring system for non-invasively recording the vibration signals from the surface of knee joints with osteoarthritis (OA), and to validate the feasibility of the measuring system. In human trials, twenty-nine normal subjects and ninety-nine OA patients in the Department of Ortho
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Li, Yong-Sheng, and 李永勝. "Interval Type-2 Fuzzy Vibration Control of a Multiple Degree-of-Freedom Structure Using Shape Memory Material absorber." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/re49sh.

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碩士<br>國立臺北科技大學<br>自動化科技研究所<br>103<br>A tunable vibration absorber (TVA) is studied and used to suppress the vibration of a structure; the TVA is composed of a mass and two springs made by two different types of shape memory materials (SMM), which are the shape memory alloys (SMA) and the shape memory polymer (SMP). The vibration characteristic property of the TVA can be changed via tuning the Young&;#39;s modulus of the two SMM springs, which are influenced by the external applied current source. To understand the vibration characteristic of the TVA, the experiments are designed to establish t
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Ho, Chia-Feng, and 何嘉峰. "Use of optimum parameters of a two degree-of-freedom vibration absorber for suppressing the torsional-vibration responses of a uniform beam subjected to an eccentric harmonic dynamic load." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/20070994946354894963.

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碩士<br>國立高雄海洋科技大學<br>輪機工程研究所<br>98<br>In the existing literature, the conventional one degree-of-freedom (dof) vibration absorber is a widely used device for suppressing translational (i.e., vertical or horizontal) structural responses induced by external dynamic loads. For the case of suppressing torsional motions of structures, the relating information is limited. Therefore, this paper presents the optimum parameters for a two-dof vibration absorber such that the torsional-vibration responses of a structure due to external dynamic loads can be effectively suppressed. To this end, equations of
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Chung, Chiu-Hung, and 鍾湫浤. "The Optimization of Maximized Electrical Power and Minimized Structure Volume of a Multi-Degree of Freedom Vibration-Based Harvesting Device." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/30286403746641929009.

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博士<br>大同大學<br>機械工程學系(所)<br>103<br>Because portable electronic devices are popular, a durable electrical power for these devices is necessary. However, there is a problem of electrical exhaust during a prolonged use. So as to provide sufficient and continuous electrical power, interest in developing portable energy harvesters with a spring-mass system is raising. As can be seen, application of the cantilever-beam electrical generator is limited to small vibrations at a higher frequency and is used within small systems such as the MEMS. A structure with a spring-mass system is often used to extr
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Lin, Wan-Tsz, and 林莞慈. "Suppression of Residue Vibration for a Two-Degree of Freedom System During Long Range Motion Using Command Shaping Methods and Control." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/63886749419037164385.

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碩士<br>國立成功大學<br>機械工程學系碩博士班<br>95<br>Residual vibration control is crucial for numerous applications in long-range precision transportation applications such as gantry cranes and wafer steppers. These systems usually require a fast maneuver with small motion-induced vibration amplitudes. In order to achieve this goal, residual vibration resulting from structure motion must be analyzed and suppressed. In this work, a two-degree of freedom pendulum system mounted on a linear servomotor was designed and fabricated to simulate the motion of cranes and wafer steppers in high speed rest-to-rest ma
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Chiang, Chen-Yuan, and 江振源. "Vibration analyses of a rectangular plate due to moving loads by using moving four-degree-of-freedom spring-damper-mass element." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/60436200118256238573.

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碩士<br>國立高雄海洋科技大學<br>輪機工程研究所<br>101<br>This paper presents the theory of moving four-degree-of-freedom spring-damper-mass element which consists of a lumped mass , two roller masses ( ), two springs ( ) and two dampers ( ), so that the rotary inertia effects, translational inertia effects, spring effects and damping effects of the moving load, can be taken into account. The element property matrices of the last element are derived based on the dynamic equilibrium equations of the moving spring-damper-mass (SDM) system. Since the interaction effects between the moving SDM system and the s
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Chang, Ren-Jye, and 張仁傑. "Use of Equivalent Spring Method for Free Vibration Analyses of a Rectangular Plate Carrying Multiple Three-degree-of-freedom Spring-Mass Systems." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/40361217769884614758.

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碩士<br>國立高雄海洋科技大學<br>輪機工程研究所<br>97<br>Due to the complexity of mathematical expressions, the literature concerning the free vibration analysis of plates carrying multiple three-degree-of-freedom (dof) spring-mass systems is rare. In this paper, the three degrees of freedom (dof’s) for a spring-mass system refer to the translational motion of its lumped mass in the vertical ( ) direction and the two pitching motions of its lumped mass about the two horizontal ( and ) axes. The basic concept of this paper is to replace each three-dof spring-mass system by a set of equivalent springs, so that th
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Liu, Chung-Chin, and 柳忠勤. "Use of moving four-degree-of-freedom spring-damper-mass element for the vibration analyses of a beam subjected to moving loads." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/90787455801797219154.

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碩士<br>國立高雄海洋科技大學<br>輪機工程研究所<br>101<br>In order to take the rotational inertia effects, translational inertia effects, spring effects and damping effects of the moving load into account, this paper presents the theory of moving four-degree-of-freedom spring-damper-mass element which consists of a lumped mass , two roller masses ( ), two springs ( ) and two dampers ( ). The element property matrices of the last element are derived based on the dynamic equilibrium equations of the moving spring-damper-mass (SDM) system. Since the interactions between the moving SDM system and the supported
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Hung, Chao-Lung, and 洪肇隆. "Use of Equivalent-Mass Method for calculating the free vibration characteristics of a rectangular plate carrying multiple three degree-of-freedom spring-mass systems." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/80819636851871140568.

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碩士<br>國立高雄海洋科技大學<br>輪機工程研究所<br>98<br>This paper aims at presenting a technique to replace each three-degree-of-freedom (3-dof) spring-mass system (or substructure) by a set of equivalent masses so that the dynamic characteristics of a rectangular plate (or main structure) carrying any number of elastically mounted lumped masses may be obtained from the same plate carrying the same sets of rigidly attached equivalent masses. Because the three degrees of freedom (dof’s) of the substructure are embedded in its equivalent masses, the total dof of the entire vibrating system (i.e, the main structur
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Chen, Jun-Jie, and 陳俊傑. "Use of three-degree-of-freedom spring-damper-mass absorber for suppressing the vibration responses of a rectangular flat plate subjected to eccentric distributed dynamic loads." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/48277854494014594418.

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碩士<br>國立高雄海洋科技大學<br>輪機工程研究所<br>100<br>Study on the vibration reduction is an important research topic in the field of structural engineering, therefore, the relevant information is abundant. Because the mathematical expressions for vibration reduction of plates are more complicated than those of beams, the literature relating to the former is relatively fewer. However, the literature concerning the suppression of torsiona-and-bending-coupled vibration responses of plates is limited. Thus, the object of this research is to present a theory regarding the 3-dof spring-damper-mass absorber, so tha
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