受非均匀调制演变随机激励结构响应快速精确计算

Fast and precise computation of structural responses to non uniformly modulated evolutionary random excitations

本文假定结构受到非均匀调制的演变随机激励，亦即其调制函数是时间与频率二者的函数。导出了有关的虚拟激励算法，并采用精细逐步积分格式，进行时变功率谱计算。

In this paper, the evolutionary random excitations acting on structures are assumed to be non uniformly modulated, i.e. the modulation functions depend both on time and frequency. The corresponding pseudo excitation method (PEM) is derived. By combining PEM with the High Precision Direct (HPD) integration scheme, the time dependent PSD of various structural responses can be computed precisely and very quickly.