In this paper the boundary element method (BEM) is used to determine acoustic-related quantities in open domains from vibrating structures. Two different types of structures have been analysed, a sphere and an engine transmission cover. The analysed acoustical quantities are pressure amplitude and pressure and intensity amplitude respectively. The numerical results were compared with the analytical and experimental results. In both cases, the sphere and the transmission cover, the input to the BEM program is the normal velocity of the structure surface. The analysed frequency range was in the case of the sphere 100-5000 Hz and a good agreement between numerical and analytical results was obtained up to frequency 3500 Hz. In the engine transmission cover case, the analysed frequency range was 434-3552 Hz with an overall good agreement between numerical and experimental results in the frequency range of 644-1848 Hz. [References: 9]
展开▼
