中文摘要：

将径向点插值方法应用在结构波动特性的快速分析中。在波数与方位角构成的二维参数空间中，通过初始规则节点布点和梯度自适应过程．对表征结构波动特性之一的群速度进行了插值计算。并把插值计算的结果与直接计算的结果进行比较，通过误差分析验证了径向插值方法在结构波动特性的快速计算中的有效性。

英文摘要：

In this paper, the radial wave characteristics in structures. po A int interpolation method （RPIM） is suggested to fast analysis the primary regular nodes location is introduced in the wave numberangle space, and an adaptive procedure is proposed to refine the subfield with large gradient of group velocity with respect to azimuth angle. The results from RPIM are compared to the results from original method. The error analysis validates the efficiency and accuracy of RPIM in the fast analysis of wave characteristics in structures.