Boundary Element Method In The Development Of Vehicle Body Structures For Better Interior Acoustics
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S. Kopuz, Y.S. Unlusoy & M. Qaliskan
Boundary element method in the development of vehicle body structures for better interior acoustics S. Kopuz, Y.S. Unliisoy, M. Qali§kan Mechanical Engineering Department, Middle East Technical University, 06531 Ankara, Turkey ABSTRACT In this paper, Boundary Element Method (BEM) is exploited for the numerical solution of interior acoustics problems governed by the Helmholtz's equation. A detailed literature survey on the application of the BEM to the radiation problems concerning the interior regions is presented. A formulation directed to the particular application of noise generation inside motor vehicle passenger compartments is developed. The solution of the problem is illustrated, in detail, on a classical acoustic problem, i.e. the acoustic response of a spherical cavity. The sound pressure variation along the radius is examined as a function of the dimensionless frequency number. The effect of an opening on the surface of the body is also examined.