| 人造地震动合成中的位移误差分析 |
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| 引用本文： | 范留明,李宁,黄润秋.人造地震动合成中的位移误差分析[J].工程地质学报(英文版),2003,11(1):79-84. |
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| 作者姓名： | 范留明 李宁 黄润秋 |
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| 作者单位： | 1.西安理工大学岩土所,西安710048; |
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| 摘 要： | 三角函数级数法是合成人工地震动常用算法之一,但是通过对加速度积分求取位移时,却存在与零线漂移相类似的位移漂移现象。
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| 关 键 词： | 人造地震动 强度包络函数 位移漂移 奇异点 |
| 文章编号： | 1004-9665/2003/11(01)-0079-05 |
| 收稿时间： | 2002-07-08 |
| 修稿时间： | 2002年7月8日 |
ANALYSIS OF COMPUTION ERRORS IN SYNTHESIZING ARTIFICIAL GROUND MOTION |
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| Institution: | 1.Xi′an University of Technology, Shanxi Xi′an 710054;2.Chang′an University, Xi′an 710048;3.Chengdu University of Technolgy, Chengdu 610059 |
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| Abstract: | Method of trigonometric series is one of methods widely used for syhthesizing artificial ground motion. However, the compution errors,which are similar to the classic baseline shift, are found in integrated acceleration time history. An analytic formula for calculating integrated velocity time history is deviated in detail, and compution errors are analyzed emphatically. The study proves that the strength envelope function will produce compution errors of integrated velocity time history, if there are non differentiable singular points in it. On this basis, a new modified method is put forward. |
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| Keywords: | Artificial ground motion Strength envelope function Displacement shif Non differentiable singular point |
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