基于小波理论的地震动合成方法研究  

METHOD OF GROUND SHOCK COMPOSITION BASED ON WAVELET THEORY

作　　者：杨帆[1] 邹立华[1] 曾新发[1] 

机构地区：[1]兰州交通大学土木工程学院,兰州730070

出　　处：《振动与冲击》2007年第12期127-130,134,共5页Journal of Vibration and Shock

基　　金：兰州交通大学"青蓝"人才工程(QL-05-08A)

摘　　要：基于小波模拟信号的基本原理,在借鉴反应谱拟合法的基础上,提出一种采用频带能量控制为主的地震动合成方法,推导了其合成公式。并以合成的地震样本为例,对其频谱特性进行了分析研究。研究结果表明,该方法合成的地震样本函数能准确地反映出地震动的基本特性,特别是地震动的时频非平稳性,具有较高的工程实际应用价值。A method of ground shock composition is introduced, which is mainly based on the wavelet transformation and on the frequency band power control. Taking the composed earthquake swatch as an instance, analysis of its spectrum character is carried out. The result shows that the earthquake swatch function composed with the method can accurately reflect the fundamental characteristics of the earthquake. It is of high application value, especially in the time-frequency nonstationary case.

关 键 词：小波变换 人工地震动 频带能量控制 反应谱 功率谱 

分 类 号：TU12[建筑科学—建筑理论]