摘要
三角函数级数法是人工地震动合成常用的计算方法之一 ,但是利用这种方法计算速度时程时 ,却存在一定的零线漂移现象 ,并且对位移时程产生很大的影响。本文详细地分析了产生误差的原因 ,在此基础上 ,建立了光滑强度包络线计算模型 ,较好地解决了这一问题。通过工程实例计算证明 ,该计算模型是正确可行的。
The method of trigonometric series is one of widely used methods for calculating artificial ground motion. However, it is found that the baselines of the integrated velocity time history are shifted with certain amount which has a significant effect on the integrated displacement time history in the course of calculation by it. The cause of computation errors is discussed in this paper. In order to correct it, a new model of differentiable nonsingular strength envelope function is proposed. The theory and practice proved that the new method is reasonable and effective.
出处
《工程地质学报》
CSCD
2000年第3期369-373,共5页
Journal of Engineering Geology
基金
国家杰出青年科学基金资助研究!(编号 :495 2 5 2 0 4)
关键词
地震动
零线漂移
光滑强度包络线模型
Artificial ground motion Strength envelop function Baseline shift Differentiable nonsingular point.
