| 局部和全局边界条件的组合 |
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| 引用本文： | 景立平,廖振鹏.局部和全局边界条件的组合[J].地震工程与工程振动,2000,20(3):8-14. |
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| 作者姓名： | 景立平 廖振鹏 |
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| 作者单位： | 中国地震局工程力学研究所，黑龙江 哈尔滨 150080 |
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| 基金项目： | 地震学联合资助基金!（95－07－442） |
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| 摘 要： | 时域局部人工边界是以行波概念为基础的，原则上不能用于模拟零频分量（消减运动）。Ｗｏｌｆ提出了能同时模拟零频分量和行波的双渐近－多向透射边界。本文指出，在这一组合中的双渐近边界的高频渐近项是不合理的，还查能降低模拟精度。据此，本文提出一种概念清楚、简便实用的组合方案－多次射透－静力边界，并通过数值试验对此方案进行检验。
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| 关 键 词： | 多次透射公式 边界条件 土－结动力相互作用 |
| 文章编号： | 1000-1301(2000)03-0008-07 |
Combination of local and global artificial boundary condition |
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| JING Li-ping,LIAO Zhen-peng.Combination of local and global artificial boundary condition[J].Earthquake Engineering and Engineering Vibration,2000,20(3):8-14. |
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| Authors: | JING Li-ping LIAO Zhen-peng |
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| Abstract: | Local artifical boundary condition in time domain is based on concept of travelingwave. It cannot simulate zero-frequency component(evanescent motion) generally. Wolf put forward the doubly asymptotic multi-direction-transmitting boundary, which can simulate zero -frequency component as well as traveling wave. It is pointed out is this paper that its high -frequency asymptotic term is unreasonable and probably reduces the simulating accuracy. Herein, multi - transmitting -static boundary, a combination scheme that is clear, simple and practical, is presented. The scheme is examined by numerical experiments. |
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| Keywords: | multi-transmitting formula double asymptotics static simulation |
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