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

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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A Design Method for Direction Selective Structural-acoustic Coupled Radiator

구조-음향 연성현상을 갖는 방사 방향을 가질 수 있는 방사체 설계방법

  • 서희선 (한국과학기술원 기계공학과) ;
  • 김양한 (한국과학기술원 기계공학과)
  • Published : 2005.02.01
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Abstract

This paper presents a design method for the structural-acoustic coupled radiator that can emit sound in the desired direction. A coupled system that has a finite space and a semi-infinite space separated by two flexible walls and an opening is considered. An objective function is selected to maximize radiation power on a main axis and minimize a side lobe level. To get initial values, prediction of a pressure distribution on field points and radiation pattern of the structural-acoustic coupling system is shown at a coupled-resonant frequency. Three different optimization methods are adapted to design the coupled radiator. Pressure and intensity distribution of the designed radiator is presented.

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References

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  1. Acoustic Radiation from the Modal Vibrations of a Thick, Finite Cylinder with Various Boundary Conditions vol.23, pp.7, 2013, https://doi.org/10.5050/KSNVE.2013.23.7.585