Relevant bibliographies by topics / Damping loss factor and coupling loss factor

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Damping loss factor and coupling loss factor'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 February 2022

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Journal articles on the topic "Damping loss factor and coupling loss factor"

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Delpero, Tommaso, Andrea E. Bergamini, and Paolo Ermanni. "Identification of electromechanical parameters in piezoelectric shunt damping and loss factor prediction." Journal of Intelligent Material Systems and Structures 24, no. 3 (2012): 287–98. http://dx.doi.org/10.1177/1045389x12457253.

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Shunted piezoelectric elements have been studied for several years as promising devices for vibration damping. Different shunting techniques have been developed to deal with the vibration energy in the appropriate way. The energy dissipated by all these techniques, expressed in terms of loss factor or damping ratio, mainly depends on two different contributions: the electromechanical coupling and the shunt design. Therefore, an accurate prediction of the damping is based on a reliable identification of the generalized coupling coefficient that completely describes the electromechanical couplin
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Clarkson, B. L. "Estimation of the Coupling Loss Factor of Structural Joints." Proceedings of the Institution of Mechanical Engineers, Part C: Mechanical Engineering Science 205, no. 1 (1991): 17–22. http://dx.doi.org/10.1243/pime_proc_1991_205_085_02.

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This paper shows how Bishop's receptance method can be used to derive the transmission of vibrational energy across a structural joint. The results are averaged over frequency bands and on the assumption of light damping an approximate formula for the coupling loss factor is obtained. This is an important parameter in the statistical energy analysis method of estimating the response of structures to broad-band random forces. The results compare well with those obtained by the travelling wave method.
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Wang, Ting, Tao Yao, and Guo Lin Duan. "Optimization Design on Vibration and Noise Reduction of Damping Sandwich Circular Saw." Applied Mechanics and Materials 215-216 (November 2012): 433–37. http://dx.doi.org/10.4028/www.scientific.net/amm.215-216.433.

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In view of the study of topology optimization design method on vibration and noise reduction of damping sandwich circular saw, the optimal thickness and layout of damping material were obtained. The optimization model of circular saw was established by using the coupling method, the optimum thickness of damping layer was found. By using ESO method, deleting elements method and modal loss factor sensitivity calculation method were obtained. Making use of modal loss factor sensitivity, ineffective elements were deleted by judging the whole structure damping effect on each damping material elemen
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Mao, Jie, Zhi Yong Hao, Xin Rui Chen, and Ji Yang. "The Application of SEA in Automobile Dash Sound Transmission Loss Numerical Calculation." Applied Mechanics and Materials 152-154 (January 2012): 894–99. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.894.

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In order to study the structure-borne sound radiation, statistical energy analysis (SEA) was adopted and an automobile dash was divided into 31 subsystems; the modal density, damping loss factor (DLF) and coupling loss factor (CLF) were acquired, which were the basic parameters of SEA; then dash transmission loss (TL) at the middle and high frequency (MHF) ranging from 100 Hz to 10k Hz was calculated. The most outstanding advantage of SEA was that calculation could be fast done, which was more convenient than FEM (Finite Element Method) and BEM (Boundary Element Method). Finally, a TL experime
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Liu, Wen Guang, and Hong Lin He. "An Analytical Method for Vibration Fatigue of Cracked Beams." Advanced Materials Research 479-481 (February 2012): 783–86. http://dx.doi.org/10.4028/www.scientific.net/amr.479-481.783.

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A new analytical method for vibration fatigue life of cracked beams was proposed with the structural response changes as crack growth. In analysis, the damping loss factor was introduced by the complex elastic modulus, and the crack growth was simulated by employing a Paris equation, and the coupling effect of vibration and crack growth was considered through vibration analysis and estimation of fatigue crack propagation cycles by cycles. Results indicate that impacts of exciting frequency and damping on the crack growth are obvious. The resonance fatigue crack growth rate decreases rapidly wh
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Liu, Wenguang, and Mark E. Barkey. "The Effects of Breathing Behaviour on Crack Growth of a Vibrating Beam." Shock and Vibration 2018 (2018): 1–12. http://dx.doi.org/10.1155/2018/2579419.

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The effects of breathing behaviour on the dynamic response and crack growth are studied through a cracked cantilever beam. The main goal is to reveal the coupling mechanism of dynamic response and crack growth by employing a plain single-degree-of-freedom (SDOF) lumped system with the breathing crack stiffness and friction damping. The friction damping loss factor is derived by using Coulomb friction model and energy principle. Natural frequency, dynamic stress, dynamic stress intensity factor (DSIF), and crack growth are analyzed by case studies in the end. Results indicate that not only does
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Du, Xiaofei, Dacheng Huang, Qidi Fu, and Jianrun Zhang. "Effects of Acoustic Black Hole Parameters and Damping Layer on Sound Insulation Performance of ABH Circular Plate." Applied Sciences 9, no. 24 (2019): 5366. http://dx.doi.org/10.3390/app9245366.

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The acoustic black hole (ABH) can be utilized to achieve aggregation of flexural wave in structures with the feature that the thickness gradually reduced to zero with a power exponent no less than 2. The above characteristics could be applied in vibration reduction, noise attenuation or improving sound insulation. Previous literatures on vibration and acoustic characteristics of ABH structures mainly focus on the structural response under mechanical force excitation, while the transmission loss (TL) of circular plates embedded with two-dimensional ABHs investigated in this paper is a vibro-aco
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Yan, Feng, Robin Wilson, and Peter Rutherford. "Prediction of acoustic transmission in heavily damped system using hybrid Ray-Tracing-SEA method." Noise Control Engineering Journal 68, no. 3 (2020): 226–36. http://dx.doi.org/10.3397/1/376819.

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Classic statistical energy analysis mainly deals with the energy transmission of system with relatively low damping. With the application of passive damping treat- ments, one of the fundamental assumptions in SEA, i.e., a diffused field, tends to fail. The energy attenuation along transmission path becomes so significant that there may exist large energy level difference within one structural component. In light of this, this study proposes to use a hybrid ray-tracing-SEA method to predict the acoustic transmission in heavily damped system. Heavily damped structural compo- nents are treated as
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Gao, Nansha, Jiu Hui Wu, Hong Hou, and Lie Yu. "Excellent low-frequency sound absorption of radial membrane acoustic metamaterial." International Journal of Modern Physics B 31, no. 03 (2017): 1750011. http://dx.doi.org/10.1142/s0217979217500114.

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This paper proposes a new radial membrane acoustic metamaterial (RMAM) structure, wherein a layer membrane substrate is covered with a rigid ring (polymethyl methacrylate frame and aluminum lump). The dispersion relationships, transmission spectra and displacement fields of the eigenmodes of this radial membrane acoustic metamaterial are studied with FEM. In contrast to the traditional radial phononic crystals (RPCs), the proposed structures can open bandgaps (BGs) in lower frequency range (0–300 Hz). Simulation results show that the physical mechanism behind the bandgaps is the coupling effec
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Park, Young-Ho, and Suk-Yoon Hong. "Hybrid power flow analysis using coupling loss factor of SEA for low-damping system—Part I: Formulation of 1-D and 2-D cases." Journal of Sound and Vibration 299, no. 3 (2007): 484–503. http://dx.doi.org/10.1016/j.jsv.2006.03.055.

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Dissertations / Theses on the topic "Damping loss factor and coupling loss factor"

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Libardi, Ana Lúcia. "Vibração em estruturas acopladas sujeitas a excitações em altas freqüencias." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-12022016-141655/.

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Este trabalho baseia-se no estudo e aplicação da Análise Estatística de Energia (SEA). Tal técnica é amplamente empregada nos estudos de vibrações em altas freqüências, dominadas por altas densidades modais e oferecendo toda a solução para o modelo em termos de parâmetros estatísticos. Aplica-se SEA tanto a modelos teóricos e numéricos quanto a modelos experimentais. Qualquer uma das duas abordagens descrita anteriormente tem como objetivo a obtenção dos parâmetros SEA, conhecidos por fator de perda por dissipação interna, fator de perda por acoplamento e densidade modal. Para o estudo
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Straka, Martin. "Výpočtové modelování vysokofrekvenčního hluku v kabině letounu EV-55M." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230560.

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This thesis describes methods of high frequency noise and vibrations computation of cabin part of EV–55M (aircraft developed by Evektor Kunovice). There is a brief summary of methods used for determining high frequency noise and vibrations in the first part of the thesis. Detailed explanation is given for Statistical Energy Analysis (SEA) which is nowadays the most dominant method in this area. The energy balance equation is derived in this chapter and SEA parameters such as modal density, damping loss factor, coupling loss factor and power input are introduced here. Next part deals with main
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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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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 paramet
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Bolduc, Maxime. "Acquiring statistical energy analysis damping loss factor for complex structures with low to high damping characteristics." Thèse, [S.l. : s.n.], 2007. http://savoirs.usherbrooke.ca/handle/11143/1801.

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Park, Woo Sun. "The sources of variability in the statistical energy analysis of two rectangular plates." Thesis, University of Southampton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271652.

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Gallimore, Craig Allen. "Passive Viscoelastic Constrained Layer Damping Application for a Small Aircraft Landing Gear System." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/35350.

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The main purpose of this report was to test several common viscoelastic polymers and identify key attributes of their applicability to a small aircraft landing gear system for improved damping performance. The applied viscoelastic damping treatment to the gear was of a constrained layer type, promoting increased shear deformation over free surface treatments, and therefore enhanced energy dissipation within the viscoelastic layer. A total of eight materials were tested and analyzed using cyclic loading equipment to establish approximate storage modulus and loss factor data at varying loading
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Ramanathan, Sathish Kumar. "The effects of damping treatment on the sound transmission loss of honeycomb panels." Licentiate thesis, KTH, MWL Structural and vibroacoustics, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12514.

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<p>In the industry, all passenger vehicles are treated with damping materials to reduce structure-borne sound. Though these damping materials are effective to attenuate structure-borne sound, they have little or no effect on the air-borne sound transmission.The lack of effective predictive methods for assessing the acoustic effects due to added damping on complex industrial structures leads to excessive use of damping materials.Examples are found in the railway industry where sometimes the damping material applied per carriage is more than one ton. The objective of this thesis is to provide a
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Yilmazel, Canan. "Analysis Of High Frequency Behavior Of Plate And Beam Structures By Statistical Energy Analysis Method." Phd thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605133/index.pdf.

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Statistical Energy Analysis (SEA) is one of the methods in literature to estimate high frequency vibrations. The inputs required for the SEA power balance equations are damping and coupling loss factors, input powers to the subsystems. In this study, the coupling loss factors are derived for two and three plates joined with a stiffener system. Simple formulas given in the literature for coupling loss factors of basic junctions are not used and the factors are calculated from the expressions derived in this study. The stiffener is modelled as line mass, Euler beam, and open section channel havi
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Tufano, Giovanni. "K-space analysis of complex large-scale periodic structures." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEC008.

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Pendant sa mission opérationnelle, un moyen de transport est soumis à des excitations acoustiques, aérodynamiques et structurales à large bande. Les moyens de transport, tels que les avions, les lanceurs spatiaux, les bateaux, les voitures, les trains, etc., sont conçus pour accomplir un objectif principal, généralement de transférer une charge utile (passagers, marchandises, satellites, par exemple) d’un point à un autre, en maintenant toujours un niveau élevé de confort, de sécurité et de capacité de survie de la charge utile. Les réglementations nationales et internationales en matière de p
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Marchetti, Fabien. "Modelling and characterisation of anisotropic multilayered plates on a wide frequency range." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI130.

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Le présent travail de thèse traite de la modélisation vibratoire et de la caractérisation dynamique de matériaux multicouches anisotropes. Dans le premier chapitre, une classification de quelques modèles analytiques de multicouche et techniques de caractérisation expérimentales de structures planes est établie sous la forme d'une synthèse bibliographique. Elle regroupe les récents résultats publiés autour du sujet. Le second chapitre propose une extension d'un modèle équivalent de multicouche au cas des structures anisotropes. Ce modèle décrit les premières courbes de dispersion de la structur
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Books on the topic "Damping loss factor and coupling loss factor"

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Dependence of the Induced Loss Factor on the Coupling Forms and Coupling Strengths: Linear Analysis. Storming Media, 2001.

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Dependence of the Induced Loss Factor on the Coupling Forms and Coupling Strengths: Energy Analysis. Storming Media, 2001.

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Book chapters on the topic "Damping loss factor and coupling loss factor"

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Craik, Robert J. M. "The Relationship between Transmission Coefficient and Coupling Loss Factor." In IUTAM Symposium on Statistical Energy Analysis. Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-015-9173-7_31.

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Le Bot, A. "Coupling Loss Factor." In Foundation of Statistical Energy Analysis in Vibroacoustics. Oxford University Press, 2015. http://dx.doi.org/10.1093/acprof:oso/9780198729235.003.0009.

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Lyon, Richard H., and Richard G. DeJong. "EVALUATING THE DAMPING LOSS FACTOR." In Theory and Application of Statistical Energy Analysis. Elsevier, 1995. http://dx.doi.org/10.1016/b978-0-7506-9111-6.50013-0.

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Lyon, Richard H., and Richard G. DeJong. "EVALUATING THE COUPLING LOSS FACTOR." In Theory and Application of Statistical Energy Analysis. Elsevier, 1995. http://dx.doi.org/10.1016/b978-0-7506-9111-6.50014-2.

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M. Mansour, Mohamed, and Haruichi Kanaya. "Tunable Zeroth-Order Resonator Based on Ferroelectric Materials." In Multifunctional Ferroelectric Materials. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.98475.

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Tunable microwave devices have the benefits of added functionality, smaller form factor, lower cost, and lightweight, and are in great demand for future communications and radar applications as they can extend the operation over a wide dynamic range. Current tunable technologies include several schemes such as ferrites, semiconductors, microelectromechanical systems (MEMS), and ferroelectric thin films. While each technology has its own pros and cons, ferroelectric thin film-based technology has proved itself as the potential candidate for tunable devices due to its simple processes, low power consumption, high power handling, small size, and fast tuning. A tunable Composite Right Left-Handed Zeroth Order Resonator (CRLH ZOR) is introduced in this chapter and it relies mainly on the latest advancement in the ferroelectric materials. It is common that for achieving optimum performance for the resonant structure, this involves the incorporation of an additional tuning by either mechanical means (i.e. with tuning screws) or other coupling mechanisms. The integration between electronic tuning and High-Temperature Superconducting (HTS) components yields a high system performance without degradation of efficiency. This leads not only low-loss microwave components that could be fine-tuned for maximum efficiency but will provide a tunable device over a broadband frequency spectrum as well. The dielectric properties of the ferroelectric thin film, and the thickness of the ferroelectric film, play a fundamental role in the frequency or phase tunability and the overall insertion loss of the circuit. The key advantages of using ferroelectric are the potential for significant size-reduction of the microwave components and systems and the cabibility for integration with microelectronic circuits due to the utilization of thin and thick ferroelectric film technology. In this chapter, ZOR is discussed and the conceptual operation is introduced. The ZOR is designed and simulated by the full-wave analysis software. The response is studied using electromagnetic characteristics with the applied electric field, ferroelectric thickness, and the operating temperature.
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Conference papers on the topic "Damping loss factor and coupling loss factor"

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Keswick, P. R., and M. P. Norton. "Coupling Loss Factors and Coupling Damping for Flanged Cylindrical Shells." In ASME 1991 Design Technical Conferences. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/detc1991-0293.

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Abstract This paper reports on an investigation into an experimental and theoretical evaluation of coupling loss factors and the experimental evaluation of coupling damping for statistical energy analysis of flanged cylindrical shells. It includes the following. 1. An evaluation of the power injection method and the steady state energy method for determining the coupling loss factors of conservative and non-conservatively coupled cylindrical shells. The investigation also establishes if it is necessary to use post processing or additional damping to the subsystems to obtain meaningful loss and
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Varanasi, Kripa K., and Samir A. Nayfeh. "Vibration Damping Using Low-Wave-Speed Media: Complex Wavenumber and Energy Approximations." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-85452.

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Significant damping of structural vibration can be attained by coupling to the structure a low-density medium (such as a powder or foam) in which the speed of sound propagation is relatively low. We describe a set of experiments in which flexural vibration of aluminum beams over a broad frequency range is damped by introduction of a layer of lossy low-wave-speed foam. At frequencies high enough to set up standing waves through the thickness of the foam, loss factors as high as 0.05 can be obtained with a foam layer whose mass is 3.9% of that of the beam. In our prior studies [1,2], we modeled
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Yang, Lifang, and Zhiyong Long. "A SEA Model for the Noise Analysis and Prediction of a Vacuum Cleaner." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-87256.

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As an effective method for middle and high-frequency vibro-acoustics prediction, SEA (Statistical Energy Analysis) has been successfully applied to some areas such as aerospace, ship, and car. In this paper, a statistical energy analysis model is built for studying the noise prediction and control of vacuum cleaner. First the principles for subsystem partition are provided and subsystems and connections of SEA model are completed in AutoSEA software. Then for complex structures, their equivalent parameters are discussed. For different structures, a series of formulae of SEA parameters are prov
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Shende, Ketan V., and Richard Keltie. "Modelling and Experimental Comparison of Fluid Structure Coupling for Thin Sheet Metal Tanks Using Statistical Energy Analysis." In ASME 2016 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/detc2016-59071.

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Acoustic response of flat surfaces in contact with a fluid volume is of some interest for the design of automotive fuel tanks, fluid containers and underwater applications [1]. As this response can be related to the surface vibration response in the linear domain, the effect of fluid structure coupling on the vibration response of the structure is studied in this paper. Advances in the computational abilities have increased the focus of analysis-led approaches in the design of thin sheet metal tanks. Conventional finite element (FE) based approaches are useful at low frequencies but are highly
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Trego, Angela, Paul F. Eastman, William F. Pratt, and C. G. Jensen. "Reduced Boring Bar Vibrations Using Damped Composite Structures." In ASME 1995 Design Engineering Technical Conferences collocated with the ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/detc1995-0269.

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Abstract A new technology, called Stress Coupling Activated Damping (SCAD©), was applied successfully to a lathe boring bar. It reduced high frequency vibrations by up to 20 db. It can be applied to a wide range of structural designs. The geometries of the damped structures are not limited to thin plates but can be applied to tubes, I-beams, and complex structures. This allows SCAD© technology to be applied to several industry design problems, including the metrology, medical, aerospace, automotive and machine tool industries. SCAD© will also allow boring bars to: 1) be optimized for stiffness
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Ewing, Mark, and Himanshu Dande. "Characterizing Plate Damping Loss Factor Estimation Errors." In 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
20th AIAA/ASME/AHS Adaptive Structures Conference
14th AIAA. American Institute of Aeronautics and Astronautics, 2012. http://dx.doi.org/10.2514/6.2012-1471.

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Massi, Francesco, and Yves Berthier. "Coupling System Dynamics and Contact Behaviour by Numerical Modelling at Different Scales." In STLE/ASME 2010 International Joint Tribology Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ijtc2010-41055.

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When dealing with mechanical systems including contact interfaces, two different mechanics at two different time and length scales have to be accounted for: the contact mechanics and the structural mechanics. The mechanics of the contact and the mechanics of structure are coupled by friction (forces and moments), local body deformations and wear (geometrical coupling). In the past, dynamic and tribological problems were treated separately and the analysis was focused either on the mechanism scales or on the contact scales, as a function of the problem. The analysis of the dynamic response of t
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Bolduc, Maxime, Nourddine Atalla, and Andrew Wareing. "Measurement of SEA Damping Loss Factor for Complex Structures." In SAE 2005 Noise and Vibration Conference and Exhibition. SAE International, 2005. http://dx.doi.org/10.4271/2005-01-2327.

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Ewing, Mark, and Himanshu Dande. "Panel Damping Loss Factor Estimation Using the Random Decrement Technique." In 51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
18th AIAA/ASME/AHS Adaptive Structures Conference
12th. American Institute of Aeronautics and Astronautics, 2010. http://dx.doi.org/10.2514/6.2010-3113.

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San Andrés, Luis, Travis A. Cable, Karl Wygant, and Andron Morton. "On the Predicted Performance of Oil Lubricated Thrust Collars in Integrally Geared Compressors." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25914.

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Integrally geared compressors (IGCs) comprise of single stage impellers installed on the ends of pinion shafts, all driven by a main bull gear (BG) and shaft system. When compared to single shaft multistage centrifugal compressors, the benefits of IGCs include better thermal efficiency, reduced footprint and simple foundation, dispensing with a high speed coupling, as well as better access for maintenance and overhauls. In IGCs the compression of the process gas induces axial loads on the pinion shafts that are transmitted via thrust collars (TCs) to the main drive shaft and balanced by a sing
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Reports on the topic "Damping loss factor and coupling loss factor"

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Maidanik, G., and K. J. Becker. The Role of Coupling Forms and of Coupling Strengths on the Induced Loss Factor. Defense Technical Information Center, 2000. http://dx.doi.org/10.21236/ada389465.

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Maidanik, G., and K. J. Becker. Dependence of the Induced Loss Factor on the Coupling Forms and Coupling Strengths: Linear Analysis. Defense Technical Information Center, 2001. http://dx.doi.org/10.21236/ada389640.

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Maidanik, G. Dependence of the Induced Loss Factor on the Coupling Forms and Coupling Strengths: Energy Analysis. Defense Technical Information Center, 2001. http://dx.doi.org/10.21236/ada389582.

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