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Effect of the Vibration Modes on the Radiation Sound for Plate  

Kim Chang-Nam (㈜티엔텍 기술자원부)
Byun Young-Su (범한산업㈜ 연구개발팀)
Kim Jeong-Man (한국해양대학교 해사수송과학부)
Kim Ue-Kan (한국해양대학교 기계정보공학부)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.30, no.1, 2006 , pp. 73-80 More about this Journal
Abstract
In order to compute the radiated sound from a vibrating structure, the Rayleigh's integral equation has to be derived from the Helmholtz equation using Green's function. Generally, the surface velocity in the Rayleigh's integral equation uses the root mean square(rms) velocity. The calculation value is too large, because it's not considered cancelation. On the other hand. using the complex velocity, the sound pressure is calculated too small, because it considers that sound is perfectly canceled out. Therefore, this thesis proposes a correction factor(CF) which considers vibration modes and the method by which to calculate the radiating sound pressure. The theoretical results are compared with the experimental values, and the proposed method can be verified with confluence.
Keywords
Experimental modal analysis; Vibration mode; Radiation efficiency; Sound pressure mode;
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