Use of Rigid Scattering Body in the use of NAH based on the inverse BEM

역경계요소법에 근거한 근접 음향 홀로그래피에서 강체 산란체의 이용

  • 김성일 (한국과학기술원 기계공학과 소음진동제어센터) ;
  • 정지훈 (현대자동차) ;
  • 이정권 (한국과학기술원 기계공학과 소음진동제어센터)
  • Published : 2004.05.01

Abstract

The NAH based on the inverse BEM is used to reconstruct the source field, which is advantageous in dealing with the irregular source. In the implementation of this technique, a large number of pressure measurements is required because an over-determined pressure data set is required. These conditions accordingly cause the increase of measurement time and associated effort along with the error due to mal-positioning. The purpose of this study is to reduce such inconveniences: Instead of increasing the number of field pressure data, the number of transfer paths between the source and the receiver is increased by placing rigid scattering body in-between the source and receiver. For validating the usefulness and effectiveness of the method, the numerical analyses of interior problem are demonstrated. As a result, it is thought that the proposed method enables the measurement at smaller number of sensor positions and the monitoring of surface vibration with less experimental effects than before.

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