Analysis on the Insertion Loss of a Noise Barrier by the Boundary Element Method

경계요소법을 이용한 방음벽의 삽입손실 해석

  • 이우섭 (한국표준과학연구원 음향·진동그룹) ;
  • 정성수 (한국표준과학연구원 음향·진동그룹) ;
  • 황철호 (한남대학교 기계공학과)
  • Published : 2000.06.01

Abstract

This paper investigates the use of boundary element method(BEM) to analyze the insertion loss of a noise barrier. To begin with the validity of the BEm for the analysis of noise barrier insertion loss in checked by both Lam's theoretical method and the measurements in the anechoic chamber for the scale-down models. Through simulation it is shown that using 2D BEM model is sufficient to the analysis for the barrier with large ratio of length to height. By using 2D BEM model the insertion loses are predicted for the real noise barriers in several cases which are the case that they are built parallel on both roadsides the one that there are multiple sound sources and the one that there is a gap between a concrete structure and a barrier plate.

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