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http://dx.doi.org/10.5050/KSNVN.2008.18.11.1199

Application of Strain Energy for Determining the Location of Damping Material  

Kim, Joong-Bae (동양공업전문대학 기계설계과)
Ryu, Kuk-Hyun (㈜브이원)
Park, Sang-Kyu (연세대학교 환경공학부)
Lee, Sang-Jo (연세대학교 기계공학부)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.18, no.11, 2008 , pp. 1199-1205 More about this Journal
Abstract
The vehicle design engineers have studied the method of applying damping materials to the vehicle bodies by computer simulations and experimental methods in order to improve the vibration and noise characteristics of the vehicles. The unconstrained layer damping, being concerned with this study, has two layers(base layer and damping layer) and proyides vibration control of the base layer through extensional damping. Generally this kind of surface damping method is effectively used in reducing structural vibration at frequencies beyond 150Hz. The most important thing is how to apply damping treatment with respect to location and size of the damping material. To solve these problems, the current experimental methods have technical limits which are cumbersome, time consuming, and expensive. This Paper proposes a method based on finite element method and it employes averaged ESE(element strain energy) percent of total of dash panel assembly for 1/1 octave band frequency range by MSC/NASTRAN. The regions of high ESE percent of total are selected as proposed location of damping treatment. The effect of damping treatment is analyzed by comparing the frequency response function of the SPCC bare Panel and the damping treated panels.
Keywords
Strain Energy; Unconstrained Layer Damping; Damping Material; Structural Vibration;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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