基于非均匀调制函数模型的非平稳地震动模拟  

Non stationary Ground Motion Simulation Based on Non uniform Modulation Model

作　　者：陈辉国[1,2] 任俊儒[1] 杜江[1] 

机构地区：[1]后勤工程学院军事土木工程系,重庆401311 [2]重庆大学土木工程学院,重庆400045

出　　处：《后勤工程学院学报》2015年第4期16-22,共7页Journal of Logistical Engineering University

基　　金：国家自然科学基金项目(51478068)

摘　　要：通过对地震动演变谱模型化分析,在精确估计地震动时变功率谱的基础上,利用多元函数目标优化方法识别地震动的非均匀调制函数模型参数,从而建立了基于非均匀调制函数模型的时频非平稳地震动模拟方法。对给定初始地震波和直接给定模型参数2个算例的分析表明,应用本文方法模拟的地震波可以较好实现时频非平稳,而且对目标反应谱也具有较好的拟合精度。By investigating model method of ground motion evolutionary spectrum, and based on the accurate estimation of time-varying power spectra and nonlinear optimization method, we recognize parameters of the non-uniform modulation model of ground motion and establish a simulation method of the non-stationary ground motion based on the non-uniform modulation model. Through the simulation examples with initial ground motion and the model parameters directly, it can be proved that the ground mo- tion simulated by the proposed method can perform non-stationary behavior correctly, and agree with the response spectrum of the target accurately.

关 键 词：非平稳地震动 非均匀调制 演变谱 地震动模拟 

分 类 号：TU318[建筑科学—结构工程]