Tesi: "Damping (Mechanics)"

1

Ting-Kong, Christopher. "Design of an adaptive dynamic vibration absorber". Title page, contents and abstract only, 1998. http://thesis.library.adelaide.edu.au/adt-SUA/public/adt-SUA20010220.212153.

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2

Ehnes, Charles W. "Damping in stiffener welded structures". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FEhnes.pdf.

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3

Messalti, Mansour. "Viscoelastic damping of beams /". Online version of thesis, 1988. http://hdl.handle.net/1850/10414.

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4

Alberts, Thomas Edward. "Augmenting the control of a flexible manipulator with passive mechanical damping". Diss., Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/19442.

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5

Oosting, Kenneth W. "Simulation of control strategies for a two degree-of-freedom lightweight flexible robotic arm". Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/18230.

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6

Hsu, Yi-Chu. "Damping treatments for microstructures /". Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/7054.

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7

West, Ray A. "Damping of elastic-viscoelastic beams /". Online version of thesis, 1992. http://hdl.handle.net/1850/11111.

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8

Spang, Alan Wesley Jr. "In situ measurements of damping ratio using surface waves". Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/19590.

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9

Schultze, John Francis. "Evaluation of analytical and experimental methods to predict constrained layer damping behavior". Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09122009-040317/.

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10

Graves, Kynan E., e kgraves@swin edu au. "Electromagnetic energy regenerative vibration damping". Swinburne University of Technology, 2000. http://adt.lib.swin.edu.au./public/adt-VSWT20060307.120939.

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Abstract (sommario):

This thesis documents a PhD level research program, undertaken at the Industrial Institute Swinburne, Swinburne University of Technology between the years of 1997 and 2000. The research program investigated electromagnetic energy regenerative vibration damping; the process of recovering energy from damped, vibrating systems. More specifically, the main research objective was to determine the performance of regenerative damping for the application of vehicle suspension systems. This question emerged due to the need for continuous improvement of vehicle efficiency and the potential benefits possible from the development of regenerative vehicle suspension. It was noted, at the outset of this research, that previous authors had undertaken research on particular aspects of regenerative damping systems. However in this research, the objective was to undertake a broader investigation which would serve to provide a deeper understanding of the key factors. The evaluation of regenerative vibration damping performance was achieved by developing a structured research methodology that began with analysing the overall requirements of regenerative damping and, based on these requirements, investigated several important design aspects of the system. The specific design aspects included an investigation of electromagnetic machines for use as regenerative damping devices. This analysis concentrated on determining the most promising electromagnetic device construction based on its damping and regeneration properties. The investigation then proceeded to develop an 'impedance-matching' regenerative interface, in order to control the energy flows in the system. This form of device had not been previously developed for electromagnetic vibration damping, and provided a significant advantage in maximising energy regeneration while maintaining damping control. The results from this analysis, when combined with the issues of integrating such a system in vehicle suspension, were then used to estimate the overall performance of regenerative damping for vehicle suspension systems. The methodology and findings in this research program provided a number of contributing elements to the field, and provided an insight into the development of regenerative vehicle systems. The findings revealed that electromagnetic regenerative vibration damping may be feasible for applications such as electric vehicles in which energy efficiency is a primary concern, and may have other applications in similar vibrating systems.

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11

Chander, R. "Identification of distributed parameter systems with damping". Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/13386.

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12

Bindemann, Alan Charles. "Dry friction damping of built-up structures". Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/19102.

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13

Meng, Jiewu. "The influence of loading frequency on dynamic soil properties". Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/19012.

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14

Huang, Yao-Hsin. "Some fundamental issues of constrained layer damping treatments /". Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/7046.

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15

Cannon, David Wayne. "Command generation and inertial damping control of flexible macro-micro manipulators". Thesis, Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/18212.

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16

Moon, Suk-Min. "Active damping control of a compliant base manipulator". Ohio : Ohio University, 1999. http://www.ohiolink.edu/etd/view.cgi?ohiou1175797025.

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17

Howard, Carl. "Active isolation of machinery vibration from flexible structures". Title page, abstract and table of contents only, 1999. http://web4.library.adelaide.edu.au/theses/09PH/09phh8478.pdf.

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Abstract (sommario):

Thesis (Ph. D.)--University of Adelaide, Dept. of Mechanical Engineering, 1999?
Copy 2 does not have a CD-ROM. Includes bibliographical references (p. 317-330). Also available in an electronic version.

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18

Holdhusen, Mark Horner. "Experimental validation and the effect of damping on the state-switched absorber used for vibration control". Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/16688.

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19

Yu, Jin Kyu. "Nonlinear characteristics of tuned liquid dampers /". Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/10107.

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20

Zhou, Li. "Vibration control of buildings using smart magnetorheological dampers /". View Abstract or Full-Text, 2002. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202002%20ZHOU.

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Abstract (sommario):

Thesis (Ph. D.)--Hong Kong University of Science and Technology, 2002.
Includes bibliographical references (leaves 163-177). Also available in electronic version. Access restricted to campus users.

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21

Yellin, Jessica M. "An analytical and experimental analysis for a one-dimensional passive stand-off layer damping treatment /". Thesis, Connect to this title online; UW restricted, 2004. http://hdl.handle.net/1773/7030.

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22

Kabral, Raimo. "Turbocharger Aeroacoustics and Optimal Damping of Sound". Doctoral thesis, KTH, MWL Marcus Wallenberg Laboratoriet, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-207151.

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23

Lane, Jeffrey Scott. "Control of dynamic systems using semi-active friction damping". Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/16020.

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24

Agutu, Willis Owuor. "Characterization of electromagnetic induction damper". Oxford, Ohio : Miami University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1187267117.

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25

Cheng, Bo. "Passive rotational damping in flapping flight". Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 89 p, 2009. http://proquest.umi.com/pqdweb?did=1889090361&sid=9&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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26

Aygün, Adem. "Mechanics and dynamics of line boring operation with process damping effect". Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/29277.

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Abstract (sommario):

Rotating shafts are used in the power train components of aircraft and automotive engines. The shafts are turned on lathes. Engine cylinders and bearing housings are finish machined using boring bars with single or multiple inserts. The cutting forces excite the structural dynamics of the turned shafts or boring bars during machining, leading to a poor surface finish and possible damage to the machined parts. This thesis presents mathematical models of single and multiple point turning/boring operations with the aim of predicting their outcome ahead of costly physical trials on the shop floor. Turning and boring operations are conducted at low angular speeds where the system dynamics is dominated by the process damping mechanism. The dynamic forces are modeled proportional to the static and regenerative chip thickness, tool geometry, and velocities of the vibration. The process damping coefficients, which are dependent on the material, tool geometry, cutting speed and vibrations, are identified from chatter tests conducted at the critical speeds and depths. The structural dynamics of the long boring bars are modeled using the Timoshenko Beam elements in Finite Element model which allows parametric placement of the boundary conditions, such as the bearing supports. The dynamics of the interaction between the cutting process and the structure are modeled. The stability of the operations is solved in frequency domain, analytically when the velocity and vibration dependent process damping is neglected. When the process damping is included, but the periodicity of the dynamic forces is neglected, the stability of the process is solved using the Nyquist criterion. When the periodicity and process damping are considered, the dynamic system is represented by a set of differential equations with periodic, time delayed forces. The stability of such systems, which are found in the line boring of crank and cam shaft housings, is solved in the time domain using an analytical but semi-discrete method. The thesis presents a complete set of solutions in predicting the static and dynamic forces, as well as the critical depths of cuts and speeds to avoid chatter vibrations in single point, multi-point and line boring operations.

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27

Whiteman, Wayne Edward. "Analysis of systems subject to displacement-dependent dry friction damping". Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/17220.

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28

Amos, Jay Max. "Torsional vibration characteristics of beams using viscoelastic damping treatment". Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/19440.

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29

Cheng, Yi-Pen. "Frequency domain identification of structural dynamic systems with general damping matrices". Diss., Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/12494.

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30

Carey, Agustin E. "Experimental studies of welding effects on damping for undersea warfare applications". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02sep%5FCarey.pdf.

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Abstract (sommario):

Thesis (M.S. in Mechanical Engineering)--Naval Postgraduate School, September 2002.
Thesis advisor(s): Young W. Kwon, Young S. Shin. Includes bibliographical references (p. 51). Also available online.

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31

Nortemann, Markus. "Characterisation of Young's modulus and loss factor of damping materials". Thesis, Nelson Mandela Metropolitan University, 2014. http://hdl.handle.net/10948/d1021036.

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Abstract (sommario):

Given the importance of simulation techniques in automotive engineering, there is a lack of implementation regarding these techniques in the acoustics of damping materials for air-borne sound. Biot’s calculations have proven its abilities to simulate the acoustic characteristics of these damping materials. However, the characterisation of essential structural parameters, such as Young’s modulus and loss factor, in order to conduct Biot’s calculations have been inconclusive. Thus, the primary research objective of this study is to propose a new measurement system for the structural Biot parameters. After a comprehensive literature review has been undertaken on damping materials, as well as measurement apparatuses for Young’s modulus and loss factor of damping materials, two causes of measurement errors have been identified. Unknown stresses in measurement apparatuses and inhomogeneous, polytrophic and viscoelastic behaviour of specimens. A new measurement system that does not affect the specimens with unknown stresses and accounts for their complex behaviour required investigation. Non-contact ultrasound had been selected as a solution to determine the aforementioned parameters, since these methods do not necessarily touch or compress the specimen, which led to unknown stresses and neglection of the complex specimen behaviour with the aforementioned techniques. Although ultrasound had been used to determine structural parameters on various types of materials, it has never been used to measure soft porous damping materials. In order to find possible solutions, various sources using ultrasonics to investigate struc- tural parameters had been reviewed. In order to calculate structural parameters, the longitudinal and transversal wave velocity inside the specimen had to be determined. The main findings showed that non-contact ultrasound will be able to evaluate the Young’s modulus, loss factor as well as Poisson’s ratio. Consequently, it was shown that longitudinal velocity measurements could be conducted using well known transmission measurements. However, well known approaches would not be sufficient measuring the transversal wave velocity in soft damping materials. This problem was addressed with a special gas to be used, with lower sound speed velocity in the fluid than in the solid. Moreso, a new method determining the transversal wave velocity had been found, as it would enable the use of an even larger range of damping materials, especially ones with heavy frames and lower porosity. It will use refracted waves inside the specimen and the determination of the convertion position of the transversal to the longitudinal wave at the rear specimen surface. At the end of the study, hardware components were selected and a test rig was constructed, which should be able to prove that a determination of structural Biot parameters with non-contact ultrasound is possible with less errors instead of using mechanical transfer function systems. The development of measurement software as well as the testing of the measurement system and its validation was not under investigation in this dissertation. This study has expanded on the body of literature knowledge regarding non-contact ultrasound. Furthermore, a significant contribution has been made towards a new measurement system measuring Young’s modulus and loss factor which circumvents errors in mechanical transfer function systems. This will contribute to more precise simulations of damping materials and damped enclosures, which may ultimately result in enhanced efficiency of damping materials as well as the acoustic packaging of cars.

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32

Yeung, Ngai. "Viscous-damping walls for controlling wind-induced vibrations in buildings". Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B2324205X.

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33

Cahill, John J. "Experimental studies of noise/vibration damping for undersea warfare applications". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02Jun%5FCahill.pdf.

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34

Prucz, Jacky C. "Analytical and experimental methodology for evaluating passively damped structural joints". Diss., Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/11987.

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35

Wolff, Paul. "Experimental investigation of an actively controlled mechanical seal". Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/17228.

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36

Kittelberger, Scott Erich. "A method for the study of anelasticity in fused silica". Related electronic resource:, 2005. http://proquest.umi.com/login?COPT=REJTPTU0NWQmSU5UPTAmVkVSPTI=&clientId=3739.

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37

Ruddy, Thomas A. "Anti-sway control of a construction crane modeled as a two-dimensional pendulum". Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-12302008-063756/.

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38

Mathis, Allen MATHIS. "Theory and Application of Damping in Jointed Structures". University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1555940863603165.

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39

揚毅 e Ngai Yeung. "Viscous-damping walls for controlling wind-induced vibrations in buildings". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31242637.

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40

Namavar, Mohammad. "Collocated-system approach to damping and tracking control for nanopositioning". Thesis, University of Aberdeen, 2015. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=229000.

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41

Chang, Ellen E. "Damping Identification of Viscoelastic Coating Material through Finite Element Modal Analysis". University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439295466.

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42

Wardell, Zachary. "Gravitational radiation damping and the three-body problem /". free to MU campus, to others for purchase, 2003. http://wwwlib.umi.com/cr/mo/fullcit?p3091977.

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43

Simon, András Flowers George T. "Adaptive disturbance rejection and stabilization for rotor systems with internal damping". Auburn, Ala, 2009. http://hdl.handle.net/10415/1606.

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44

Algozzini, Lee. "MULTIFUNCTIONAL NANOCOMPOSITES FOR HIGH DAMPING PERFORMANCE". Master's thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4454.

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Abstract (sommario):

Composite structures for aerospace and wind turbine applications are subjected to high acoustic and vibrational loading and exhibit very high amplitude displacements and thus premature failure. Materials with high damping or absorbing properties are crucially important to extend the life of structures. Traditional damping treatments are based on the combinations of viscoelastic, elastomeric, magnetic, and piezoelectric materials. In this work, the use of carbon nanofibers (CNFs) in the form of interconnected self-supportive paper as reinforcement can significantly improve damping performance. The interfacial friction is the primary source of energy dissipation in CNF paper based nanocomposites. The approach entailed making CNF paper by filtration of well-dispersed nanofibers under controlled processing conditions. The CNF paper was integrated into composite laminates using modified liquid composite molding processes including Resin Transfer Molding (RTM) and Vacuum Assisted Resin Transfer Molding (VARTM). The rheological and curing behaviors of the CNF-modified polymer resin were characterized with Viscometry and Differential Scanning Calorimetry (DSC). The process analysis in mold filling and pressure distribution was conducted using Control Volume Finite Element Method (CVFEM) in an attempt to optimize the quality of multifunctional nanocomposites. The mold filling simulation was validated with flow visualization in a transparent mold. Several tests were performed to study the damping properties of the fabricated composites including Dynamic Mechanical Analysis (DMA) and piezoceramic patch based vibration tests. It was found that the damping performance was significantly enhanced with the incorporation of carbon nanofibers into the composite structures.
M.S.
Department of Mechanical, Materials and Aerospace Engineering
Engineering and Computer Science
Mechanical, Materials and Aerospace Engineering

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45

Ramesh, Periyakulam S. "Experimental design and results of 2D dynamic damping of payload motion for cranes". Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-07102009-040346/.

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46

Issa, Jimmy. "Vibration suppression through stiffness variation and modal disparity". Diss., Connect to online resource - MSU authorized users, 2008.

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Abstract (sommario):

Thesis (Ph.D.)--Michigan State University. Dept. of Mechanical Engineering, 2008.
Title from PDF t.p. (viewed on July 7, 2009) Includes bibliographical references (p. 114-117). Also issued in print.

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47

Cline, C. Harvey O. "Nonlinear control and active damping of a forced-feedback metering poppet valve". Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4780.

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Abstract (sommario):

Thesis (Ph. D.)--University of Missouri-Columbia, 2007.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on January 31, 2008) Vita. Includes bibliographical references.

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48

Zweber, Jeffrey Vincent. "A method for structural dynamic model updating via the estimation of damping parameters". Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/12447.

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49

Sareen, Ashish Kumar. "Rotorcraft airframe structural optimization for vibration and dynamic stress reduction including damping treatment". Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/12951.

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50

Park, Jae-Yeol. "Effect of Non-Proportional Damping and Spectrally-Varying Properties of Passive or Active Mounts on Powertrain Mounts". The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1218466967.

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Tesi sul tema "Damping (Mechanics)"

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