Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Prediction of the Radiated Noise of a Structure Excited by Harmonic Force Using the Doubly Asymptotic Approximation

이중점근 근사법을 이용한 조화가진 구조물의 방사소음 예측

  • Received : 2016.10.13
  • Accepted : 2017.01.10
  • Published : 2017.02.20
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Abstract

This paper presents an approach of predicting the radiated noise due to the structural vibration by internal harmonic forces using the doubly asymptotic approximation (DAA). Acoustic transfer vector is derived from the Helmholtz integral equation and the fluid-structure interaction relation of DAA. Numerical results and analytical results of radiated noise for a cylindrical shell were compared and showed that they were consistent in most of frequencies and radiation directions, but showed errors in some radiated directions in the mid-frequency region. Despite these errors, the prediction method will be suitable for practical radiated noise prediction.

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References

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