作　　者： ; ;

机构地区： 中国地震局工程力学研究所

出　　处： 《地震工程与工程振动》 1992年第1期25-36,共12页

摘　　要： 本文通过广义复模态理论把动力学方程降阶,使系统的脉冲响应函数和传递函数具有简单的形式,在此基础上讨论了一般线性系统在演变非平稳随机激励下响应计算的频域法和时域法。通过算例对频域法和时域法进行了比较,并对单自由度体系演变非平稳响应的谱矩进行了研究。 In the present paper, general complex modal theory is employed to investigate the stochastic response of linear dynamic system under evolutionary random excitation. A kind of nonstationary frequency response functions in simple form is suggested, and some methods for nonstationary response analysis are developed in both frequency and time domain,and then a comparsion is made between these two methods. Finally, response characteristics of SDOF under evolutionary random excitation are studied, and an approximate method for evaluating spectral moments of SDOF response is suggested.

关 键 词： 线性系统 随机激励 响应 非平稳

领　　域： [天文地球] [天文地球] [天文地球]