Effect of the Vibration Modes on the Radiation Sound for Plate

강판의 진동모드를 고려한 방사음 예측에 관한 연구

  • 김창남 (㈜티엔텍 기술자원부) ;
  • 변용수 (범한산업㈜ 연구개발팀) ;
  • 김정만 (한국해양대학교 해사수송과학부) ;
  • 김의간 (한국해양대학교 기계정보공학부)
  • Published : 2006.01.01

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

References

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