Relevant bibliographies by topics / Vibrational system / Dissertations / Theses
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Dissertations / Theses on the topic 'Vibrational system'

Author: Grafiati
Published: 28 May 2022
Last updated: 31 July 2025

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1

Attal, Loïse. "A system-bath model to address anharmonicity effects in the quantum vibrational dynamics of complex or interacting molecular systems." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP129.

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La dynamique quantique permet la description la plus complète de l'évolution temporelle des systèmes moléculaires en tenant compte de leur nature quantifiée. Cependant, l'effort pour résoudre les équations sous-jacentes croît exponentiellement avec le nombre de degrés de liberté. C'est ce que l'on appelle la malédiction de la dimension. Elle est particulièrement frappante pour les systèmes quantiques ouverts (ceux qui sont en contact avec un environnement), qui sont omniprésents en physique et en chimie. Elle limite aussi considérablement notre capacité à décrire rigoureusement les molécules c
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2

Wei, Ran. "A VIBRATIONAL ENERGY HARVESTING SYSTEM WITH RESONANT PIEZOELECTRIC DEVICES AND LOW-POWER ELECTRONIC INTERFACE." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1396628545.

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3

Кононенко, Микола Петрович, Николай Петрович Кононенко та Mykola Petrovych Kononenko. "Повышение качества работы грануляторов типа АВ". Thesis, Сумский государственный университет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/40281.

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Анализ опыта эксплуатации грануляторов конструкции НИИХИММАШ типа АВ в производствах аммиачной селитры (АС-67, АС- 72) и карбамида показывает, что наряду с такими их преимуществами, как простота в эксплуатации, получить продукт хорошего качества с использованием этих грануляторов невозможно. Вибрационная система грануляторов типа АВ рассчитана для работы на строго определенной нагрузке, изменение которой влечет за собой отказ вибросистемы или ее работу в нестабильном режиме. Это приводит к самопроизвольному распаду струй или несовпадению частотных характеристик вибросистемы со скорост
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4

Bacher, Sven. "Vibrational signals in a leafminer parasitoid system : the sensory ecology of a leafminer in a tritrophic context /." Zürich, 1996. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=11671.

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5

INZARULFAISHAM, Abd Rahim, and Hideyuki AZEGAMI. "Solution to Shape Optimization Problem of Linear Elastic Continuum with Prescribed Vibrational Eigen-mode." 日本機械学会, 2001. http://hdl.handle.net/2237/12180.

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6

Cettour-Janet, Raphael. "Modelling the vibrational response and acoustic radiation of the railway tracks." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLC040/document.

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Dans un contexte de densification des villes et de leurs réseaux de transport, les gens sont de plus en plus exposés au bruit. Ainsi, le résultat de l'étude d'impact vibro-acoustique joue un rôle primordial dans l'expansion du réseau ferroviaire. L'une des principales sources est le bruit de roulement : La rugosité de la surface de la roue et du rail produit un déplacement imposé sur ces derniers. Ce déplacement entraine une réponse vibratoire des roues et de la voie ferrée et leurs rayonnements acoustiques. Cette thèse propose une amélioration de la modélisation vibro-acoustique de la voie fe
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7

BHANDARI, CHURNA B. "FIRST-PRINCIPLES STUDY OF ELECTRONIC AND VIBRATIONAL PROPERTIES OF BULK AND MONOLAYER V2O5." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1459296089.

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8

Menexiadis, Dimitri. "Conception d'un système expert d'aide au diagnostic pour les machines tournantes." Valenciennes, 1988. https://ged.uphf.fr/nuxeo/site/esupversions/04ba5d72-dc25-461d-8efd-ab79aeeefb8f.

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9

Bismarck, Jonas von [Verfasser]. "Vibrational Raman Scattering of Liquid Water : Quantitative Incorporation into a Numeric Radiative Transfer Model of the Atmosphere-Ocean System and Analysis of its Impact on Remote Sensing Applications / Jonas von Bismarck." Berlin : Freie Universität Berlin, 2016. http://d-nb.info/1098185447/34.

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10

Ratnaparkhe, Amol. "FIRST PRINCIPLES STUDY OF ELECTRONIC ANDVIBRATIONAL PROPERTIES OF WIDE BAND GAPOXIDE AND NITRIDE SEMICONDUCTORS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1619606222502271.

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11

Zachar, Ryan David. "Naval applications of enhanced temperature, vibration and power monitoring." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/100058.

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Thesis: Nav. E., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.<br>Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, Engineering Systems Division, System Design and Management Program, 2015.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 131-133).<br>Navy ships require reliable information regarding their power and mechan
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12

Lehman, Bradley M. "Vibrational control of nonlinear time delay systems." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/14718.

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13

Famoso, Carlo. "Vibrational Control of Large Scale Electromechanical Systems." Doctoral thesis, Università di Catania, 2015. http://hdl.handle.net/10761/3860.

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In this thesis, our attention focuses on the fundamental role of broad-spectrum mechanical vibrations [1] to favor the working of complex electromechanical systems. Uncertainty has been already proved to allow self-organization in array of non-linear oscillator (pendulums, in particular) [2, 3]. The idea of our thesis is to show that also passive and active mechanical vibrations can play a key role on self-organization in a class of complex electromechanical systems. In fact, large-scale electromechanical systems considered in this work is referred to as imperfect uncertain systems for which c
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14

Tahmasian, Sevak. "Design, Analysis, and Optimization of Vibrational Control Strategies." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/52564.

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This dissertation presents novel vibrational control strategies for mechanical control-affine systems with high-frequency, high-amplitude inputs. Since these control systems use high-frequency, zero-mean, periodic inputs, averaging techniques are widely used in the analysis of their dynamics. By studying their time-averaged approximations, new properties of the averaged dynamics of this class of systems are revealed. Using these properties, the problem of input optimization of vibrational control systems was formulated and solved by transforming the problem to a constrained optimization one.
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15

Döhler, Michael. "Subspace-based system identification and fault detection: Algorithms for large systems and application to structural vibration analysis." Phd thesis, Université Rennes 1, 2011. http://tel.archives-ouvertes.fr/tel-00953781.

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L'identification des modes vibratoires est un sujet prioritaire dans le cadre de la surveillance des structures civiles. Certaines techniques d'identification, les méthodes sous espace, ont prouvé leur adéquation pour l'identification et la détection de changements dans les caractéristiques vibratoires, ceci sous des conditions opérationnelles. Le but de cette thèse est l'amélioration de l'efficacité et de la robustesse de ces approches pour l'identification vibratoire et pour la détection des pannes dans les structures de grande taille, équipées d'un grand nombre de capteurs et fonctionnant e
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Döhler, Michael. "Subspace based system identification and fault detection: algorithms for large systems and application to structural vibration analysis." Phd thesis, Rennes 1, 2011. http://www.theses.fr/2011REN1S141.

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System identification methods are especially attractive to structural engineering for the identification of vibration modes and mode shapes of structures, as well as for detecting changes in their vibration characteristics, both under real operation conditions. Focusing on the class of subspace-based methods, the goal of this thesis is to improve the efficiency and robustness of system identification and fault detection of large in-operational structures, which are heavily instrumented and work under noisy and varying environmental conditions. In this thesis, four different hurdles are cleared
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17

Zhang, Runze. "Modeling of coupled vibration systems with fluid-structure interaction." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPAST136.

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Cette thèse porte sur deux aspects de la dynamique vibratoire des structures en interaction fluide-structure (IFS) : le contrôle des vibrations des structures immergées dans un fluide et la récupération des vibrations induites par un fluide pour leur conversion en énergie électrique. Ce mémoire présente nos contributions dans ces deux domaines.Premièrement, concernant le contrôle des vibrations, l'émergence récente des méta-structures a ouvert de nouvelles perspectives pour maîtriser les vibrations des structures en IFS. Ces structures, souvent constituées de microstructures périodiques, perme
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18

Fallacara, Erika. "Quantum and anharmonic effects in hydrogen-bonded crystals, surfaces and biological systems." Electronic Thesis or Diss., Sorbonne université, 2022. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2022SORUS456.pdf.

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Les liaisons hydrogène sont des interactions intermoléculaires faibles qui perturbent profondément l'environnement chimique des noyaux atomiques et contribuent à l'anharmonicité des surfaces d'énergie potentielle. De plus, ils impliquent l'atome d'hydrogène, qui, même dans des conditions ambiantes, peut manifester des propriétés quantiques non négligeables en raison de sa faible masse. La structure chimique et la dynamique des systèmes avec liaison hydrogène sont influencées par l'anharmonicité et la nature quantique des noyaux. Dans cette thèse, nous étudions différents systèmes solides ou mo
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19

Іванишин, В. П. "Контроль вібраційного стану газоперекачувальних агрегатів". Thesis, Івано-Франківський національний технічний університет нафти і газу, 2005. http://elar.nung.edu.ua/handle/123456789/4057.

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Робота присвячена контролю вібраційного стану ГПА. Проаналізовано вплив вібрації на розвиток дефектів ГПА та можливості використання її для контролю вібраційного стану з урахуванням ТО. Створена математична модель процесу деформування труб з криволінійною віссю та змінним поперечним січенням, на основі якої можна отримати кількісну оцінку НДС ТО ГПА за результатами контролю його вібраційного стану. Вдосконалено метод побудови кореляційної матриці, на основі якої розроблена методика оптимального розташування вібродавачів на корпусі ГПА з ТО, використання якої дозволяє до 48% зменшити кількість
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20

Павленко, Іван Володимирович, Иван Владимирович Павленко та Ivan Volodymyrovych Pavlenko. "Науково-теоретичні основи вібраційних процесів у гетерогенних системах". Thesis, Сумський державний університет, 2020. https://essuir.sumdu.edu.ua/handle/123456789/78078.

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Дисертацію присвячено вирішенню важливої науково-технічної проблеми інтенсифікації процесів у сепараційних, класифікаційних і грануляційних пристроях шляхом розроблення науково-теоретичних основ процесу вібраційного впливу на гетерогенні системи, моделювання гідродинаміки сепараційних пристроїв, аналізу впливу сполученого конвективного теплообміну і капілярного руху на ефективність сепарації газоконденсатних систем, запобігання негативній дії вторинних процесів і впливу вібрацій на процес утворення гранул монодисперсного складу. Вперше теоретично обгрунтовано підвищення ефективності сепараці
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21

Farshidianfar, A. "Optimisation of torsional vibrations in driveline systems : an investigation into the sensitivity of a driveline system when subjected to shock torque and optimisation of high and low frequency vibration." Thesis, University of Bradford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.632856.

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22

Pacynko, Witold F. "A vibrational spectroscopic study of some surfactant systems." Thesis, Durham University, 1985. http://etheses.dur.ac.uk/7039/.

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Infra red and Raman spectroscopy has been used to study: (i) the aggregation process of some polyoxyethylene surfactants in apolar media,(ii) the microenvironment of water at and near the micellar surface in seme cationic surfactants, and(iii) the nature of the hydrocarbon core within cationic surfactant micelles. We have used the V(_s)(O-H) stretching vibration of some polyoxyethylene surfactants of the type C(_12)H(_25) (OCH(_2)CH(_2)) (_n)-OH [where n = 0 to 8] to quantify the aggregation process in a variety of solvents. These have included heptane, decane, benzene, carbon tetrachloride, d
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23

Kalkert, Robert E. "Improving the vibrational performance of wood floor systems." Diss., This resource online, 1997. http://scholar.lib.vt.edu/theses/available/etd-10032007-172140/.

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Dalianis, Sotirios A. "Time-frequency methods for nonstationary systems." Thesis, University of Southampton, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246198.

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25

Karami, Mohammad Amin. "Micro-Scale and Nonlinear Vibrational Energy Harvesting." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/38612.

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This work addresses issues in energy harvesting that have plagued the potential use of harvesting through the piezoelectric effect at the MEMS scale. Effective energy harvesting devices typically consist of a cantilever beam substrate coated with a thin layer of piezoceramic material and fixed with a tip mass tuned to resonant at the dominant frequency of the ambient vibration. The fundamental natural frequency of a beam increases as its length decreases, so that at the MEMS scale the resonance condition occurs orders of magnitude higher than ambient vibration frequencies rendering the harvest
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Winnard, Thomas Johan. "Theoretical Parametric Study of Through-Wall Acoustic Energy Transfer Systems." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/103387.

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Technological advances require novel solutions for contactless energy transfer. Many engineering applications require unique approaches to power electrical components without using physical wires. In the past decade, awareness of the need to wirelessly power electrical components spawned many forays into the field of wireless power transfer (WPT). WPT techniques include capacitive energy transfer, electromagnetic inductive power transfer, electromagnetic radiative power transfer, electrostatic induction, and acoustic energy transfer. Acoustic energy transfer (AET) has many advantages over othe
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27

Yang, Yonggang [Verfasser]. "Multidimensional vibrational dynamics of hydrogen bonded systems / Yonggang Yang." Berlin : Freie Universität Berlin, 2008. http://d-nb.info/1023401088/34.

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28

Krull, Alexander G. (Alexander Gerhard). "Experimental testing of LIGO vibration isolation system." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40439.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.<br>Includes bibliographical references (leaf 29).<br>The LIGO (Laser Interferometer Gravitational-wave Observatory) project is designed to detect gravitational waves using precision interferometry. The detection from astrophysical sources has the potential to test Einstein's Theory of General Relativity, and additionally open a new window into the universe and its origin. The Initial LIGO detectors are currently operating at a strain sensitivity of 10-21 Hz, or equivalently 1018 m/ [square root of] Hz,
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29

Fu, Qilin. "Joint Interface Effects on Machining System Vibration." Licentiate thesis, KTH, Maskin- och processteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-122392.

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Vibration problems are still the major constraint in modern machining processes that seek higher material removal rate, shorter process time, longer tool life and better product quality. Depending on the process, the weaker structure element can be the tool/tool holder, workpiece/fixture or both. When the tool/tool holder is the main source of vibration, the stability limit is determined in most cases by the ratio of length-to-diameter. Regenerative chatter is the most significant dynamic phenomenon generated through the interaction between machine tool and machining process. As a rule of thum
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Bean, Ralph. "Vibrational control of chaos in artificial neural networks /." Online version of thesis, 2009. http://hdl.handle.net/1850/10645.

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31

Hall, Israel Restus. "Spectral analysis and regularity quantification of skeletal muscle signals as a non-invasive assessment of muscle." Morgantown, W. Va. : [West Virginia University Libraries], 2004. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=3660.

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Thesis (M.S.)--West Virginia University, 2004.<br>Title from document title page. Document formatted into pages; contains viii, 119 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 97-101).
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Vreugdenhil, Andrew J. "Applications of vibrational spectroscopy to inorganic environmental and industrial systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0008/NQ30411.pdf.

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Vreugdenhil, Andrew J. "Applications of vibrational spectroscopy to inorganic environmental and industrial systems." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=34477.

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Environmental and industrial systems have been investigated using vibrational spectroscopy. These applications were chosen to demonstrate the potential of vibrational spectroscopy as a means of obtaining molecular information from either in-situ or model environments in a rapid, convenient manner requiring minimal sample handling. Diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) has been used to investigated two systems in the area of environmental chemistry. Using the characteristic CO stretching bands of the Mn(CO)$ sb3$ fragment, methylcyclopentadienyl manganese tricarbo
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Allison, Duncan. "Longitudinal vibration of road vehicles." Thesis, Cranfield University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284907.

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35

Milligan, William James. "The design of a control system for the mitigation of vibration in variable speed screw compressor systems." Thesis, Glasgow Caledonian University, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.547435.

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36

Giacomin, Joseph A. "An experimental investigation of the vibrational comfort of child safety seats." Thesis, University of Sheffield, 2003. http://etheses.whiterose.ac.uk/15039/.

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The research of this thesis was performed to understand the vibrational dynamics of stage 0&1 child safety seats and of the children who occupy them. Since no previous vibration data for small children or child seats was found, the investigation took the form of experiments designed to shed light on the behaviour of the system consisting of child, child seat, vehicle safety belt and vehicle seat. To provide a background for interpreting the results a literature review was performed of child seat characteristics, of human whole-body response and of primate whole-body response. An industrial tes
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MATUTTI, ALBERTO CORONADO. "ENERGY FLOW IN VIBRATION ISOLATION SYSTEMS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1999. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=1951@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>Sistemas de isolamento de vibrações são utilizados em uma grande variedade de aplicações (automóveis, edifícios, estruturas espaciais como aeronaves, satélites e em máquinas rotativas) para reduzir a transmissão de vibrações mecânicas geradas por equipamentos ou a eles transmitidas pela vizinhança. Um isolamento é obtido inserindo-se um componente mecânico (isolador) que desempenha o papel de vínculo entre o sub-sistema que contém a perturbação e o sub-sistema a ser isolado. Duas são as quantidades geralmente utilizadas p
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LIMA, ROBERTA DE QUEIROZ. "RAMDOM VIBRATION ANALYSIS OF MECHANICAL SYSTEMS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2011. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=19543@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>A parte inicial da dissertação apresenta uma discussão sobre o método de Monte Carlo e sobre geradores de realizações de variáveis aleatórias e vetores aleatórios. São analisados geradores baseados em: congruência linear, Método da Transformada Inversa e algoritmo de Metrópolis-Hastings (método de Monte Carlo com Cadeia de Markov MCMC). Posteriormente, são apresentadas técnicas para a análise de vibrações estocásticas em sistemas mecânicos com grau de liberdade, múltiplos graus de liberdade e contínuos. As propriedades dos sistema
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SOARES, EDSON JOSE. "ENERGY SPREAD IN VIBRATION ISOLATION SYSTEMS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1999. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=26507@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Muitas indústrias usam em seus processos materiais viscoplásticos. Esses materiais possuem propriedades que dependem fortemente da temperatura. Não é incomum encontrar processos envolvendo escoamentos não isotérmicos de materiais viscoplásticos. Nesses casos, informações sobre a transferência de calor são extremamente necessárias para um bom atendimento e aperfeiçoamento das operações. Fluidos de perfuração são tipicamente suspensões aquosas, e, por consequência, de natureza viscoplástica.Tais fluidos devem possuir densidade corr
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Johnson, James R. "Vibration acceptability in wood floor systems." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/41946.

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<p>Two distinct sections of research are presented in this thesis. The first section summarizes research conducted on laboratory-built floors. Floors were built and tested to determine the plywood contribution to increasing the bending stiffness, number of joists effective in resisting applied load, and calculation of fundamental frequency. The second section summarizes research conducted on in-situ floors. Procedures were developed to numerically integrate acceleration and velocity data to obtain displacement values. Tests were conducted on 86 subjectively rated wood floors to determine avera
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Persson, Tobias, and Andreas Fredlund. "Motor control under strong vibrations." Thesis, Uppsala universitet, Fasta tillståndets elektronik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-355208.

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42

Boffa, John. "Model Reduction of Large Structural Systems for Active Vibration Control." University of Technology, Sydney. Faculty of Engineering, 2006. http://hdl.handle.net/2100/338.

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This thesis studies the applicability of the Dynamic model reduction method that is used for direct plant order reduction in the active vibration control of large and flexible structures. A comparison of the performances between the reduced models produced by the Dynamic model reduction method and those obtained by other common model reduction methods such as the Guyan method, and the Mode-displacement method have been carried out. By using a full analytical model of a twenty storey building as the reference, each three degrees of freedom model was compared by computer simulation. The open-lo
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Pan, Lin. "Pharmaceutical powder dispensing by ultrasonic vibration dosing system." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/386902/.

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Powder technology is one of the most important parts in manufacturing industry when materials applied in large quantities of solid particles. Dispensing technology for powders can significantly improve operation efficiency in manufacturing processes. The powder dispensing technologies have a broad range of applications. The powders exhibit different flow behaviours due to different physical properties. This project aims to reveal the dispensing mechanism and pharmaceutical powder flow behaviour in a designed dispensing hopper under the ultrasonic mechanical vibration, and to develop a powder d
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Hubert, Elisa. "Vibration monitoring of an aeronautic power transmission system." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSES015.

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Cette thèse contient les résultats de travaux de recherche menés à SafranTech et au Laboratoire d’Analyse des Signaux et des Processus Industriels (LASPI) de l’Université de Lyon. Le sujet traité porte sur la surveillance vibratoire des transmissions de puissance aéronautique et plus particulièrement des engrenages. Traditionnellement, les vibrations sont étudiées par analyse spectrale au moyen d’une représentation du spectre de Fourier. Basé sur ces observations, les vibrations des engrenages ont été représentées par un modèle empirique multiplicatif : d’une part le signal d’engrènement, haut
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Robu, Bogdan. "Active vibration control of a fluid/plate system." Phd thesis, Toulouse 3, 2010. http://thesesups.ups-tlse.fr/1103/.

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Cette thèse s’intéresse au problème du contrôle actif des vibrations structurelles d’une aile d’avion induites par le ballottement du carburant dans les réservoirs qu’elle contient. L'étude proposée ici est concentrée sur l'analyse d'un dispositif expérimental composé d'une longue plaque rectangulaire en aluminium équipée d'actionneurs et de capteurs piézoélectriques et d'un réservoir cylindrique. La difficulté principale réside dans le couplage complexe entre les modes de vibration de l’aile et les modes de ballottement du liquide. Un modèle de ce dispositif à l’aide d’équations aux dérivées
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Niknam, Alborz. "VIBRATION INSTABILITY IN FRICTIONALLY DRIVEN ELASTIC MECHANICAL SYSTEM." OpenSIUC, 2018. https://opensiuc.lib.siu.edu/dissertations/1579.

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Numerous mechanical systems contain surfaces in partial or full sliding contact, and therefore, prone to friction-induced vibration instability. These include systems containing mechanical switches, brakes, clutches, gears, rolling contact bearings, journal bearings, robot end-effector grasp and motion, oil drills, etc. The prominent dynamic features of a mechanical system, subject to friction-induced vibration, can be captured by an appropriate equivalent mass-on-belt model. It is the goal of this research to provide a comprehensive study of friction-induced vibrations in mechanical system
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Guo, Zhe-Wei, and 郭哲瑋. "Improvement of Settle Time for Servo Control System with Vibrational Load." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/2eh9xx.

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碩士<br>國立臺北科技大學<br>電力電子產業研發碩士專班<br>104<br>The settling time of the servo control system should be as small as possible to improve production efficiency. However, in some applications with coupling or flexible device such as robotics, mechanical arm and lead screw system would reduce the rigidity of the system. The system with low rigidity would generate the vibration when the load reaches the target position. Furthermore, the vibration would increase the settling time and reduce the production efficiency. Since vibration causes mechanical device abrasion, the positioning accuracy of servo syste
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VARONE, CHIARA. "Vibrational interaction between urban agglomerates and geological system with heterogeneous composition." Doctoral thesis, 2017. http://hdl.handle.net/11573/937982.

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This PhD thesis evaluates Site-City Interaction (SCI - Guéguen et al. 2002, Bard et al. 2005, Guéguen and Bard 2005, Kham et al. 2006, Semblat et al. 2008), i.e., the influence of buildings on ground motion and local seismic responses. The free-field conditions of the ground surface, which consider the absence of structures that can generate vibrations, are widely used to analyse the local seismic response for both scientific and technical issues. Nevertheless, this assumption leads to a very strong approximation in urban areas, in which the dynamic interaction between the urban agglomerate an
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Hong, Fu-Ji, and 洪福基. "The Effect of Temperature on Vibrational Characteristics of a Shaft-Disk System." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/46902597522521273002.

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碩士<br>國立高雄第一科技大學<br>機械與自動化工程所<br>92<br>A lot of rotors of rotary machine running under the high-temperature environment, even temperature of rotors does increase progressively or decrease progressively. Because of the change of the temperature and load, the dynamic characteristics of the shaft and disk is also influenced. This paper discusses the effect of dynamic characteristics of the rotor various temperature. For understand relationship of different temperature to vibration amplitude or phase by way of theory and experiment at the same time, It used energy method derive motion equation of
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Mokhtar, Md Asjad. "Rotordynamic studies on the rotor-stator contact interaction." Thesis, 2018. http://eprint.iitd.ac.in:80//handle/2074/7957.

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