ABAQUS动力无限元人工边界研究

›› 2014, Vol. 35 ›› Issue (10): 3007-3012.

ABAQUS动力无限元人工边界研究

戚玉亮^{1, 2, 3, 4}，大塚久哲³

1. 广州市建筑科学研究院有限公司，广州 510440；2. 华南理工大学土木与交通学院，广州 510641； 3. 同济大学岩土及地下工程教育部重点实验室，上海 200092；4. 九州大学建设振动工学研究室，日本福冈 819-0395

收稿日期:2013-06-28 出版日期:2014-10-11 发布日期:2014-10-27
作者简介:戚玉亮，男，1981年生，博士，主要从事岩土力学、地下结构工程抗震方面的研究工作。
基金资助:
国家“863”科技项目(No. 2006AA11Z118)；国家自然科学基金项目(No. 40872179)；广东省教育部科技部产学研结合项目(No.2012B090600046)。

Study of ABAQUS dynamic infinite element artificial boundary

QI Yu-liang^{1, 2, 3, 4}，HISANORI Otsuka³

1. Guangzhou Institute of Building Science Co.,Ltd., Guangzhou 510440, China; 2. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China; 3. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 4. Earthquake Engineering Laboratory, Kyushu University, Fukuoka 819-0395, Japan

Received:2013-06-28 Online:2014-10-11 Published:2014-10-27

摘要/Abstract

摘要： 针对动力场天然无限地基的数值模拟与地震波输入问题进行了一些有意义的研究，评述了现有动力计算常用无限元的优缺点，详细阐述了ABAQUS无限元理论体系框架，并加以改进，提出一种考虑外域地震动影响的ABAQUS动力无限元人工边界。采用等效边界力的叠加原理，对入射波和散射波分开处理，视入射波和散射波在边界上互不影响，将输入地震动转化为作用于有限元无限元交界面上的等效应力的方法来解决外源波的入射问题。算例验证结果表明：内源振动和固定边界会出现失真和扰动现象，同时该计算结果与黏弹性边界的计算结果对比可知，该方法对外行散射波的过滤作用优于黏弹性边界。因此，改进的ABAQUS动力无限元人工边界理论方法有效且具有一定的稳定性。

关键词: 地震波输入, 人工边界, ABAQUS动力无限元

Abstract: Some valuable studies have been done in the aspects of numerical simulation of natural infinite foundation and seismic wave input. The thesis comments the advantages and disadvantages of infinite element, and expatiates on the theory system of ABAQUS infinite element which is improved. The artificial boundary of ABAQUS dynamic infinite element considering the impact of outland fluctuations is proposed. Based on the equivalent boundary force superposition principle, the incident and scattered waves are dealt with separately, and assumed that they are independently to each other. The input ground motion is converted to equivalent stress acting on the interface between the finite element and infinite element to solve the problem of exogenous incident wave. Case study results show that: for the calculation results obtained from inside vibration source and the fixed boundary, the distortion and disturbances appear; the results calculated by the method mentioned above are compared with the results of viscoelastic boundary, which make it certain that the filter function of outgoing scattered wave with the method mentioned above is better than viscoelastic boundary. Therefore, the improved ABAQUS dynamic infinite element boundary method is effective and has certain stability.

Key words: seismic wave input, artificial boundary, ABAQUS dynamic infinite element

中图分类号:

TU 47

戚玉亮，大塚久哲,. ABAQUS动力无限元人工边界研究[J]. , 2014, 35(10): 3007-3012.

QI Yu-liang ，HISANORI Otsuka,. Study of ABAQUS dynamic infinite element artificial boundary[J]. , 2014, 35(10): 3007-3012.

参考文献

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