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Dissertations / Theses on the topic 'Vibration damper'

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Published: 5 June 2025

Last updated: 1 August 2025

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1

Stabile, Alessandro. "Electromagnetic shunt damper for spacecraft micro-vibration mitigation." Thesis, University of Surrey, 2018. http://epubs.surrey.ac.uk/845703/.

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The stringent stability requirements imposed by advanced, high-resolution payloads have produced an increased interest in the development of better-performing micro-vibration isolators. Several devices aimed at mitigating micro-vibrations have been studied and implemented, but their application is still far from being ideal due to the several drawbacks that they present, such as limited low-frequency attenuation for passive systems or high power consumption and reliability issues for active systems. This research focuses on the modelling and testing of Electromagnetic Shunt Dampers (EMSD) char

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2

Vecchiarelli, Jack. "Aeolian vibration of a conductor with a Stockbridge-type damper." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ28075.pdf.

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3

Son, Lovely. "STUDIES ON SHOCK VIBRATION CONTROL BY MOMENTUM EXCHANGE IMPACT DAMPER." 京都大学 (Kyoto University), 2007. http://hdl.handle.net/2433/49140.

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学位授与大学：京都大学 ; 取得学位: 博士(工学) ; 学位授与年月日: 2007-09-25 ; 学位の種類: 新制・課程博士 ; 学位記番号: 工博第2859号 ; 請求記号: 新制/工/1420 ; 整理番号: 25544<br>Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(工学)<br>甲第13388号<br>工博第2859号<br>新制||工||1420(附属図書館)<br>25544<br>UT51-2007-Q789<br>京都大学大学院工学研究科精密工学専攻<br>(主査)教授松久寛, 教授吉村允孝, 教授松原厚<br>学位規則第4条第1項該当

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4

Alrumaih, Wail Saad. "A novel tuned visco-elastic damper for floor vibration abatement." University of Dayton / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1245387294.

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5

Groves, Keir Harvey. "Identification of squeeze-film damper bearings for aeroengine vibration analysis." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/identification-of-squeezefilm-damper-bearings-for-aeroengine-vibration-analysis(ff379560-86d9-4ba9-8820-07377ba4b831).html.

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The accuracy of rotordynamic analysis of aeroengine structures is typically limited by a trade-off between the capabilities and the computational cost of the squeeze-film damper (SFD) bearing model used. Identification techniques provide a means of efficiently implementing complex nonlinear bearing models in practical rotordynamic analysis; thus facilitating design optimisation of the SFD and the engine structure. This thesis considers both identification from advanced numerical models and identification from experimental tests. Identification from numerical models is essential at the design s

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6

Al-Rumaih, Wail Saad. "A novel tuned visco-elastic damper for floor vibration abatement." Dayton, Ohio : University of Dayton, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1245387294.

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7

Koo, Jeong-Hoi. "Using Magneto-Rheological Dampers in Semiactive Tuned Vibration Absorbers to Control Structural Vibrations." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/29023.

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Since their invention in the early 1900s, Tuned Vibration Absorbers (TVAs) have shown to be effective in suppressing vibrations of machines and structures. A vibration absorber is a vibratory subsystem attached to a primary system. It normally consists of a mass, a spring, and a damper. Mounted to the primary system, a TVA counteracts the motions of the primary system, "absorbing" the primary structure's vibrations. A conventional passive TVA, however, is only effective when it is tuned properly, hence, the name "tuned" vibration absorber. In many practical applications, inevitable off-tu

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8

Sykes, John Edward Hugh. "Investigation on non-linear phenomena in rotor-damper assemblies." Thesis, University of Southampton, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314725.

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9

Siew, Chan-Cheong. "On the non-linear vibration of rotor-squeeze film damper assemblies." Thesis, University of Southampton, 2001. https://eprints.soton.ac.uk/47560/.

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Squeeze film dampers (SFDs) have long been used to attenuate the vibration of high-speed rotating machines such as gas turbine engines, turbo-chargers, etc. Due to their highly non-linear behaviour, it is often difficult to calculate the steady state vibration response of rotor-SFD systems. Over the years, methods such as the Runge-Kutta-Merson Method (RKMM) have been applied to solve the non-linear equations of motion for the system. However such a method requires huge amounts of computational time especially when a flexible shaft system is involved. In order to accelerate the calculations of

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10

Ma, Ruisheng. "Using Inerter-based Damper for Offshore Semi-submersible Platform Vibration Control." Thesis, Curtin University, 2020. http://hdl.handle.net/20.500.11937/83885.

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Semi-submersible platforms are widely utilized but may subject to excessive vibrations during their service lives. This thesis aims to study the performance of inerter-based control systems in reducing the vibrations of semi-submersible platforms subjected to wave load. Three inerter-based control systems are proposed, and extensive analytical and experimental studies are performed to evaluate the control effectiveness of these inerter-based control systems.

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11

Kasap, Huseyin. "Investigation Of Stockbridge Dampers For Vibration Control Of Overhead Transmission Lines." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614865/index.pdf.

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This thesis aims to examine the performance of Stockbridge dampers used to suppress aeolian vibrations on overhead transmission lines arising from the wind. In this respect, a computer program, based on the Energy Balance Method, is developed using MATLAB. The developed computer program has also a graphical user interface (GUI), which allows the program to interactively simulate Stockbridge damper performance for vibration control of overhead transmission lines. Field tests results obtained from literature are used in various case studies in order to validate and evaluate the developed softwar

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12

Erisen, Zuhtu Eren. "Frequency Domain Optimization Of Dry Friction Dampers Used For Earthquake Vibration Damping Of Buildings." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614134/index.pdf.

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There are many active and passive vibration control techniques to reduce the effect of energy on structures which emerges during an earthquake and reduce the displacement of buildings that is caused by ground acceleration. Main advantage of passive vibration control techniques over active vibration control techniques is<br>no external power or a sensor is required for passive vibration control devices (PVCDs) and it results in lower installation and maintenance costs. However, PVCDs require a predefined optimum damping ratio and optimum damping distribution along the structure since they are n

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13

YUOKA, Teruaki, Keiji TAGATANI, Yoshikazu HAYAKAWA, Akira NAKASHIMA, Daiyu INAGAKI, and Kazuhiko OSHIMA. "A Hybrid Damper Composed of Elastomer and Piezo Ceramic for Multi-Mode Vibration Control." 日本機械学会, 2010. http://hdl.handle.net/2237/20764.

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14

Guglielmino, Emanuele. "Robust control of a hydraulically actuated friction damper for vehicle applications." Thesis, University of Bath, 2001. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343771.

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15

Ritchey, John Kenneth. "Application of Magneto-Rheological Dampers in Tuned Mass Dampers for Floor Vibration Control." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/35287.

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<p> The purpose of this research is to establish the effectiveness of tuned-mass-dampers (TMD) using semi-active magneto-rheological (MR) dampers to mitigate annoying floor vibrations. Annoying floor vibration is becoming more common in today's building structures since building materials have become stronger and lighter; the advent of computers has resulted in "paperless" offices; and the use of floors for rhythmic activities, such as aerobics and concerts, is more common. Analytical and experimental studies were conducted to provide an understanding of the effects of incorporating the semi

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16

Kim, Hyeong Gook. "New passive damper systems for vibration control of residential houses and building structures." 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/161001.

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17

Tanner, Edward Troy. "Combined Shock and Vibration Isolation Through the Self-Powered, Semi-Active Control of a Magnetorheological Damper in Parallel with an Air Spring." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/29541.

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Combining shock and vibration isolation into a single isolation system package is explored through the use of an air spring in parallel with a controlled magnetorheological fluid damper. The benefits of combining shock and vibration isolation into a single package is discussed. Modeling and control issues are investigated and test and simulation results are discussed. It is shown that this hybrid isolation system provides significantly increased performance over current state-of-the-art passive systems. Also explored is the feasibility of scavenging and storing ambient shipboard vibration

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18

Chu, Fulei. "The vibration control of a flexible rotor by means of a squeeze-film damper." Thesis, University of Southampton, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386603.

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19

Valo, Lukáš. "Simulační analýza vibrací turbodmychadla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401530.

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The master thesis deals with computational modeling of a turbocharger vibrations and and assessment of influnce of passive dynamic vibration absorber on vibrations of actuator bracket. The use of dynamic vibration absorber was summarized in the research study. The analysis were performed using finite element method in ANSYS. Several computational models of turbocharger were created with different ways of modeling bolted joints between turbocharger parts. Modal analysis of each model was performed and the results were compared. For the selected model, the response to the kinematic excitation fr

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20

Juma, Hameed W. "Numerical and Experimental Analyses of Actively Controlled Pendulum Tuned Mass Damper." University of Dayton / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1544528950528469.

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21

Sodano, Henry Angelo. "Development of Novel Eddy Current Dampers for the Suppression of Structural Vibrations." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/27677.

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The optical power of satellites such as the Hubble telescope is directly related to the size of the primary mirror. However, due to the limited capacity of the shuttle bay, progress towards the development of more powerful satellites using traditional construction methods has come to a standstill. Therefore, to allow larger satellites to be launched into space significant interest has been shown in the development of ultra large inflatable structures that can be packaged inside the shuttle bay and then deployed once in space. To facilitate the packaging of the inflated device in its launch

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22

SALVI, Jonathan. "Optimisation of Tuned Mass Damper Devices Towards Structural Vibration Reduction: Theoretical Settings and Numerical Analyses." Doctoral thesis, Università degli studi di Bergamo, 2014. http://hdl.handle.net/10446/224063.

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The present doctoral thesis concerns theoretical concepts and numerical studies on the optimisation of Tuned Mass Damper (TMD) devices towards the control and reduction of structural dynamic responses, with specific reference to the context of civil and seismic engineering. The fundamental background of the optimisation of the TMD parameters, also called tuning, is presented first in its main features, based on reference to the mainstream literature, and in the assessing the relevance of the structural properties and of the role of the characteristics of the external excitation. A comprehensi

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23

GASTALDI, CHIARA. "Vibration control and mitigation in turbomachinery." Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2677053.

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The thesis project is directly concerned with safety and reliability as it addresses the problem of High Cycle Fatigue (HCF) failure of turbine blades. Turbine blades can be found in engines used to power aircrafts and electrical generators. Statistics suggest that on average 2.5 HCF events occur on each new design engine. These failures happen suddenly, as resonant vibrations cause cracks which usually propagate very rapidly. Since it is often impossible to avoid the presence and growth of such resonant vibrations, designers frequently incorporate dry friction devices into turbine designs. Ty

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24

Huang, Haoyu. "A temperature controlled semi-active tuned mass damper using shape memory alloy for vibration reduction applications." Thesis, University of Bath, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.720664.

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This study developed a temperature controlled semi-active tuned mass damper (TMD) using shape memory alloy (SMA) for civil structural applications. It addressed the off-tuning issues caused by the variances in structural mass and stiffness when in service, since off-tuning of the TMD increases the structural response. The effect of in-service temperature on SMA can provide adaptive dynamic properties to TMD. Therefore, the natural frequencies can be adjusted to an optimal range. In this thesis, the material characterisation of SMA is studied through acting dynamic cyclic loading. It was found

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25

Rottmann, Cheryl E. "The use of tuned mass dampers to control annoying floor vibrations." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-09182008-063455/.

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26

Luboya, Silhady Tshitende. "Response of Footbridges equipped with TLD : A numerical and experimental assessment." Thesis, KTH, Bro- och stålbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-278563.

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In recent years, an increase to design slender and aesthetically-pleasing structures have resulted in some structures having a low natural frequency. This is because the design calculation did not meet the requirement of serviceability performance. Structures can experience excessive vibrations when they are subjected to different types of dynamic loading. A device can be installed to prevent these vibrations.In this thesis, we study the response of buildings and lateral vibrations of footbridges equipped with Tuned Liquid Damper. The aim is to mitigate the first mode of vibration. Tuned Liqui

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27

Marian, Laurentiu. "The tuned mass damper inerter for passive vibration control and energy harvesting in dynamically excited structural systems." Thesis, City University London, 2016. http://openaccess.city.ac.uk/14884/.

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A novel passive vibration control configuration, namely the Tuned-Mass-Damper-Inerter (TMDI) is proposed in this work. The TMDI combines the “inerter”, a mechanical two-terminal flywheel device developing resisting forces proportional to the relative acceleration of its terminals, with the well-known and widely used in various passive vibration control applications Tuned-Mass-damper (TMD). Introduced as a generalization of the TMD, the TMDI takes advantage of the “mass amplification effect” of the inerter to achieve enhanced performance compared to the classical TMD. For linear harmonically ex

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28

Song, Xubin. "Design of Adaptive Vibration Control Systems with Applicaion to Magneto-Rheological Dampers." Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/29556.

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The design of nonlinear adaptive control systems for reducing vibration transmission in applications such as transportation systems is discussed. The systems studied include suspension systems, such as those used in vehicles, employing nonlinear magneto-rheological (MR) dampers that are controlled to provide improved vibration isolation. Magneto-rheological dampers use a novel class of smart fluid whose apparent viscosity changes as it is exposed to a magnetic field. The developed adaptive control scheme is designed to deal with the nonlinearities and uncertainties that commonly arise in mo

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29

Gamal, Eldin Ahmed Mohamed. "Analytical and experimental evaluation of the leakage and stiffness characteristics of high pressure pocket damper seals." Thesis, Texas A&M University, 2003. http://hdl.handle.net/1969.1/16.

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This thesis presents numerical predictions for the leakage and direct stiffness coefficients of pocket damper seals. Modifications made to earlier flow-prediction models are discussed. Leakage and static pressure measurements on straight-through and diverging configurations of eight-bladed and twelve-bladed seals were used for code validation and for calculation of seal discharge coefficients. Higher than expected leakage rates were measured in the case of the twelve-bladed seal, while the leakage rates for the eight-bladed seals were predicted reasonably accurately. Results are presented f

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30

Novosád, Ivan. "Šestiválcový řadový vznětový motor s vypínáním válců." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417519.

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Master 's thesis deals with design of a drivetrain of six cylinder inline engine with cylinder deactivation for heavy agricultural vehicles. In this thesis were devised various possibilities of crankshaft balancing, the best design solution of counterweight was based on optimization in software Catia. Further, the crankshaft was analysed for force and momentum loading and torsional vibration, based on which, the torsional vibration damper was designed. There were considered several options for cylinder deactivation, which were analysed for finest run of engine and the best thermal distribution

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31

Zapateiro, de la Hoz Mauricio Fabián. "Semiactive control strategies for vibration mitigation in adaptronic structures equipped with magnetorheological dampers." Doctoral thesis, Universitat de Girona, 2009. http://hdl.handle.net/10803/7751.

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Los sistemas tales como edificios y veh¨ªculos est¨¢n sujetos a vibraciones que pueden causar mal funcionamiento, incomodidad o colapso. Para mitigar estas vibraciones, se suelen instalar amortiguadores. Estas estructuras se convierten en sistemas adaptr¨®nicos cuando los amortiguadores son controlables. Esta tesis se enfoca en la soluci¨®n del problema de vibraciones en edificios y veh¨ªculos usando amortiguadores magnetoreol¨®gicos (MR). Estos son unos amortiguadores controlables caracterizados por una din¨¢mica altamente no lineal. Adem¨¢s, los sistemas donde se instalan se caracterizan por

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32

Gur, S., S. K. Mishra, and G. N. Frantziskonis. "Thermo-mechanical strain rate-dependent behavior of shape memory alloys as vibration dampers and comparison to conventional dampers." SAGE PUBLICATIONS LTD, 2015. http://hdl.handle.net/10150/615541.

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A study on shape memory alloy materials as vibration dampers is reported. An important component is the strain rate-dependent and temperature-dependent constitutive behavior of shape memory alloy, which can significantly change its energy dissipation capacity under cyclic loading. The constitutive model used accounts for the thermo-mechanical strain rate-dependent behavior and phase transformation. With increasing structural flexibility, the hysteretic loop size of shape memory alloy dampers increases due to increasing strain rates, thus further decreasing the response of the structure to cycl

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Macháček, Ondřej. "Magnetorheological Strut for Vibration Isolation System of Space Launcher." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-391819.

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Práce se zabývá návrhem magnetoreologické (MR) vzpěry vibroizolačního systému (VIS) pro kosmický nosič. V rešeršní části jsou popsány vybrané VIS a vzpěry těchto systémů, které byly v kosmických nosičích využity v minulosti. Každá z těchto vzpěr obsahující kapalinu byla těsněna pomocí statických těsnění a pružných vlnovců vyrobených z oceli. Důkladněji byla analyzována vzpěra pasivního systému VIS s označením ELVIS, jehož konstrukce se stala inspirací pro tuto práci. Jedná se o tříparametrický systém, v němž je tlumič uložen na pružině, jejíž tuhost přibližně odpovídá objemové tuhosti vlnovců

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34

Agarwal, Sandeep. "Aeromechanical Stability Augmentation Using Semi-Active Friction-Based Lead-Lag Damper." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7547.

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Lead-lag dampers are present in most rotors to provide the required level of damping in all flight conditions. These dampers are a critical component of the rotor system, but they also represent a major source of maintenance cost. In present rotor systems, both hydraulic and elastomeric lead-lag dampers have been used. Hydraulic dampers are complex mechanical components that require hydraulic fluids and have high associated maintenance costs. Elastomeric dampers are conceptually simpler and provide a ``dry" rotor, but are rather costly. Furthermore, their damping characteristics can degrade w

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35

Liu, Yilun. "Design, Modeling and Control of Vibration Systems with Electromagnetic Energy Harvesters and their Application to Vehicle Suspensions." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/73387.

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Instead of dissipating vibration energy into heat waste via viscous damping elements, this dissertation proposes an innovative vibration control method which can simultaneously mitigate vibration and harvest the associated vibration energy using electromagnetic energy harvesters. This dissertation shows that the electromagnetic energy harvester can work as a controllable damper as well as an energy harvester. The semi-active control of a linear electromagnetic energy harvester, for improvement of suspension performance, has been experimentally implemented in a scaled-down quarter-car suspensio

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Aydan, Goksu. "Ride Comfort Improvement By Application Of Tuned Mass Dampers And Lever Type Vibration Isolators." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12612131/index.pdf.

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In this study, the efficiency of linear and rotational tuned mass dampers (TMD) and lever type vibration isolators (LVI) in improving ride comfort is investigated based on a vehicle quarter-car model. TMDs reduce vibration levels by absorbing the energy of the system, especially at their natural frequencies. Both types of TMDs are investigated in the first part of this study. Although linear TMDs can be implemented more easily on suspension systems, rotational TMDs show better performance in reducing vibration levels<br>since, the inertia effect of rotational TMDs is higher than the linear TMD

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Kovář, Lukáš. "Silikonový tlumič torzních kmitů šestiválcového vznětového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318694.

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The aim of this thesis is to design crankshaft for in-line six-cylinder diesel engine and to design viscous torsional vibration damper for the cranktrain of specified parameters. The thesis includes the creation of a dynamic torsional model of cranktrain and calculation of forced vibrations of mechanism with and without damper. Part of this thesis is also strength analysis of the designed crankshaft with damper using the Finite Element Method (FEM).

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Pham, Hai Minh. "Computation of the vibration of a whole aero-engine model with nonlinear bearings." Thesis, University of Manchester, 2010. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:128171.

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Aero-engine assemblies are complex structures typically involving two or three nested rotors mounted within a flexible casing via squeeze-film damper (SFD) bearings. The deployment of SFDs into such structures is highly cost-effective but requires careful calculation since they can be highly nonlinear in their performance, particularly if they are unsupported (i.e. without a retainer spring). The direct study of whole-engine models with nonlinear bearings has been severely limited by the fact that current nonlinear computational techniques are not well-suited for complex large-order systems. T

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Ontiveros, Pérez Sergio Pastor. "Otimização simultânea de posições e forças de amortecedores de vibração por atrito para controle de vibrações de estruturas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/96355.

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A otimização de amortecedores é uma área nova que vem sendo explorada nos últimos anos. Existem vários métodos clássicos e outros mais recentes que estão disputando em confiabilidade, eficiência e rapidez na obtenção de um resultado ótimo. Os algoritmos de otimização são classificados em determinísticos, que utilizam a informação do gradiente, ou seja, usam os valores das funções e suas derivadas, e os meta-heurísticos são algoritmos aleatórios que são métodos probabilísticos não baseados em gradiente, utilizando somente a avaliação da função objetivo. O Firefly Algorithm é um algoritmo meta-h

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Polášek, Michal. "Tlumič torzních kmitů pro řadový pětiválcový motor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228079.

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In this diploma thesis is created a cranktrain model in the MBS system ADAMS Engine. The thesis defines basic parameters and proportions of the torsional damper for in-line 5-cylinder engine. This thesis also puts mind to calculation of torsional vibration. In the MBS system ADAMS Engine is demonstrated affect of torsional damper on the torsional vibration of the crankshaft.

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Chang, Lee-Jen, and 張力仁. "Analysis of vibration absorption of pipe conveying fluid with vibration-damper." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/02841881004827931234.

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Li, Wen-Cheng, and 李文誠. "Vibration Control by Using Stiffness Controllable Mass Damper." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/40813070482207206825.

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碩士<br>國立成功大學<br>土木工程學系碩博士班<br>97<br>The vibration mitigation performance of a conventional tuned mass damper system (TMD) is very sensitive to the fluctuation in tuning of the designed frequency to the natural frequency of the main system. Because of the stochastic characteristics of external loading and the errors of identifying system parameters, a pseudo hybrid mass damper system (PHMD) with optimal selection on control parameters can enhance the designed performance with the help of a supplementary active force acted between the main system and the mass damper. However, the control perform

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Tai, Chun-yang, and 戴君仰. "Active and Passive Vibration Control Using Electromagnetic Damper Systems." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/67137328152275058299.

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碩士<br>國立臺灣大學<br>應用力學研究所<br>96<br>In accordance with electromagnetic theory, when a conductive wire moves in a uniform magnetic field. It will generate an inductive current. And the charges of this induced current under the action of applied magnetic field experience a Lorentz force, and pass this Lorentz force whose direction is opposite to the moving direction of the wire, to the wire. According to this counteracting phenomenon, we make an electromagnetic damper and apply it to vibration control of cantilever beam. In this thesis, we first establish equations of vibration and simulate numeric

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Huang, Min-Hua, and 黃敏華. "Hibrid Tuned Mass Damper for Vibration Control of Structures." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/73831556853363955306.

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碩士<br>國立中興大學<br>土木工程研究所<br>82<br>Previous researches on reduction of structural responses using PTMD (Passive Tuned Mass Damper) did not take the effect of damper strokes into consideration in some cases, strokes of damper might exceed the allowable working space. To overcome this unrealistic situation, a control force can be applied on the device of PTMD to reduce both structural responses and the damper strokes. This research investigates how the structural properties are changed and how

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Nanda, Bharadwaj. "Application of Tuned Liquid Damper for Controlling Structural Vibration." Thesis, 2010. http://ethesis.nitrkl.ac.in/2024/1/208ce203.pdf.

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Current trends in construction industry demands taller and lighter structures, which are also more flexible and having quite low damping value. This increases failure possibilities and also, problems from serviceability point of view. Several techniques are available today to minimize the vibration of the structure, out of which concept of using of TLD is a newer one. This study was made to study the effectiveness of using TLD for controlling vibration of structure. A numerical algorithm was developed to investigate the response of the frame model, fitted with a TLD. A linear TLD model was con

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Wang, Jen-Ping, and 王振平. "Application of Tune Mass Damper and Tune Liquid Damper to the Vibration Control on Taipei 101." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/42084131410655312956.

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碩士<br>國立臺灣大學<br>土木工程學研究所<br>96<br>In this thesis, the passive control theorem and the design parameters of Tuned Mass Dampers (TMD) and Tuned Liquid Dampers (TLD) will be introduced. Both methods are applied to TAIPEI 101 subjected to earthquake or wind loading as the case study and the efficiency of both dampers will be discussed. In this study, a TLD with water inside a rigid tank interacts with a structure subjected to a horizontal excitation. The nonlinear sloshing is considered inside the tank based on the theory of potential flows. The Boundary Element Method with the Lagrangian coor

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Gkaras, Vasileios. "Vibration isolation systems using hysteretic multiple tuned mass damper oscillators." Thesis, 2008. http://hdl.handle.net/1911/22152.

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The subject of this study is the vibration isolation effect of linear and nonlinear hysteretic single degree of freedom oscillators attached to a structure. The system of oscillators, attached to the main structure, reduce the amplitude of its structural response, over a wide frequency band excitation. This is achieved by distributing the natural frequencies of the attachments over an a priori specified frequency interval, which is related to the excitation power spectrum density. In order to introduce hysteretic restoring force to the oscillators and study its effect to the vibration reductio

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Chiu, Chun-Wei, and 邱俊煒. "STRUCTURE VIBRATION SUPPRESSION BY NEURAL CONTROLLER AND ACTIVE MASS DAMPER." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/21567296598225664539.

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碩士<br>國立成功大學<br>航空太空工程學系<br>88<br>For the experimental model of fundamental frequency about 1 Hz, the vibration amplitude under resonance excitation is reduced by 80% in steady state response. The vibration amplitude under random excitation can also be suppressed effectively by 70% by the neural controller and active mass damper. In addition, the peak-to-peak displacement magnitude under 1/4 scale of Ji-Ji Earthquake (Sep. 21, 1999) is effectively reduced by 80%. The controller is also shown to be robust to system parameter variations. From the above experiments, the integration of neural

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Lee, Kwang-Way, and 李光偉. "Study of Micro-Vibration Reduction Damper for Optical Memory Devices." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/74653703312591743042.

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碩士<br>大同大學<br>機械工程研究所<br>90<br>Precise and accurate positioning is required by high-density disk storage device, such as magnetic disk devices and optical disk drivers. Excessive vibration amplitude induced by spindle motor, unbalanced optical disk, disk resonant phenomenon and external disturbance may reduce positioning accuracy. In this study, the primary purpose focuses on the design and development of micro-vibration reducing damper for high precision optical memory devices. It investigates the mechanism that generation of various vibration sources in an attempt to understand th

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Grover, Aditya. "Vibration Control of MDOF Structural System using Tuned Liquid Damper." Thesis, 2016. http://ethesis.nitrkl.ac.in/9189/1/2016_MT_AGrover.pdf.

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A Tuned Liquid Damper belongs to the passive vibration control device family installed on the top of the structure which dissipates the external excitation energy through liquid sloshing. In order to design an efficient TLD, knowing optimum TLD parameters and liquid behaviour is of crucial importance. The main advantage of TLD when compared to other form of dampers is that they can be easily designed and implemented with low installation and maintenance cost. This study investigated the structure response when coupled with and without TLD under sinusoidal excitations. For our simplicity we can

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