应用三次B样条函数插值的边界元法计算结构振动声辐射问题

本文通过在边界元方法中采用三次Ｂ样条函数作为插值形函数，对结构振动声辐射的计算进行了研究。并以脉动球作为算例，对其辐射声场中的有关声场参数进行了计算。通过将计算结果与理论解进行比较，结果表明：即使在边界剖分比较粗的情况下，利用该方法计算结构振动声辐射问题在较宽的振动频率范围内，也能给出良好的计算精度。

Calculation on the acoustic radiation problem caused-by vibrating body by boundary element method using-cubic b-spline interpolating function

In this paper, a study of the calculation on the acoustic radiation porblem caused by vibrating body is presented, based on the boundary element method using cubic B spline interpolating function. Taking a pulsating sphere as an example, some parameters in its sound field are calculated. The conclusion from the comparison between the calculating results and the analytic solutions shows that the calculating precision is satisfied in a wide rang of vibrating frequences by the method proposed here for the acoustic radiation problem caused by vibrating body, in spite of the coarse division of the boundary surface.