摘要
在总结回顾具有同一统计特征非平稳地震动过程模拟的研究基础上,提出了一个模拟产生与某个给定地震动记录具有同一统计特征时变功率谱的非平稳地震动过程的方法.方法具有如下一些特点:模拟产生的样本过程在幅值上和频率上均是非平稳的,幅值和频率的非平稳性均取决于目标时变功率谱;任意一个样本过程的时变功率谱未必符合目标谱,但在统计意义上却严格符合目标谱.最后,论文以Landers地震的一个加速度记录为例对方法进行了验证.
This paper proposes a method for simulation of non-stationary ground motion processes having the identical statistical feature, time-dependent power spectrum, with a given ground motion record, on the basis of review of simulation of non-stationary ground motion processes. The method has the following advantages: the sample processes are non-stationary both in amplitude and frequency, and both the amplitude and frequency non-stationarity depend on the target power spectrum; the power spectrum of any sample process does not necessarily accord with the target power spectrum, but statistically, it strictly accords with the target power spectrum. Finally, the method is verified by simulation of one acceleration record in Landers earthquake.
出处
《地震学报》
CSCD
北大核心
2005年第3期346-351,共6页
Acta Seismologica Sinica
基金
教育部优秀青年教师资助计划
国家自然科学基金项目(50378063)资助.
关键词
非平稳地震动过程
模拟
时变功率谱
渐进功率谱
Morlet小波功率谱
non-stationary ground motion processes
simulation
time-dependent power spectrum
evolutionary power spectrum
Morlet wavelet power spectrum