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。 In this paper, the cubic B-spline function is used as the interpolation shape function in the boundary element method, and the calculation of structure vibration sound radiation is studied. Taking the pulsating ball as an example, the relevant acoustic parameters in the radiation field are calculated. Comparing the calculated results with the theoretical ones, the results show that the method can be used to calculate the structural vibration sound radiation problem in a wide range of vibration frequency even in the case of thick boundary, and also gives good computational accuracy .