The extended Wittrick-Williams algorithm combined with the precise integration method is used to compute the propagation of non-stationary random waves in anisotropic materials.The responses of the surface due to the non-stationary random excitations of the bedrock are investigated.Based on the natural frequencies and modes computed by means of the pseudo excitation method and the precise integration method in combination with the extended W-W algorithm,the mode-superposition scheme are jointly used to solve the differential equation of non-stationary random wave propagation in layered anisotropic materials.The power spectral density of the surface random responses is thus obtained.
钟万勰,林家浩,高强.分层介质中非平稳随机波的精细求解[J].动力学与控制学报,2003,1(1):2~8; Zhong Wanxie, Lin Jiahao, Gao Qiang. Precise computation of non-stationary random waves in stratified materials[J]. Journal of Dynamics and Control,2003,1(1):2-8.
