基于ABAQUS-Python无限元的动力人工边界研究  

Research on Dynamic Artificial Boundary Based on ABAQUS-Python Infinite Element

作　　者：党康宁 苏晨辉 肖瑜 张静宜 DANG Kangning;SU Chenhui;XIAO Yu;ZHANG Jingyi(Hanjiang-to-Weihe River Water Diversion Project Construction Co.,Ltd, Shaanxi Province, Xi'an 710010, China;Longquanyi District Water Affairs Bureau of Chengdu, Chengdu 610100, China)

机构地区：[1]陕西省引汉济渭工程建设有限公司,陕西西安710010 [2]成都市龙泉驿区水务局,四川成都610100

出　　处：《广东水利水电》2021年第4期6-10,共5页Guangdong Water Resources and Hydropower

基　　金：国家科学自然基金“地震作用下高耸进水塔的动力响应及稳定性研究”(编号:51179154)。

摘　　要：结构在地震数值模拟中会产生地基辐射阻尼问题,目前广泛采用的人工边界能够有效解决该问题,然而实现一般比较繁琐。基于无限元动力边界原理和波在弹性介质中传播理论,推导了剪切波和压缩波入射情况下,人工边界各侧面节点的等效荷载时程表达式。借助ABAQUS有限元软件中无限单元,给出了无限元-有限元联合建模方法,利用软件内嵌的Python脚本语言进行开发编程,实现边界节点上荷载幅值的自动生成和施加。算例结果分析表明,该方法计算结果精度较高,能够有效解决地基辐射阻尼问题。The radiation damping problem of the foundation will be produced in the seismic numerical simulation of the structure.At present,the widely used artificial boundary can effectively solve the problem,but the implementation is generally cumbersome.Based on the dynamic boundary principle of infinite element and the theory of wave propagation in elastic medium,the equivalent load time history expressions of the nodes on each side of the artificial boundary under the incident shear wave and compression wave are derived.With the help of infinite element in ABAQUS finite element software,the joint modeling method of infinite element and finite element is given.The python script language embedded in the software is used to develop and program,and the automatic generation and application of load amplitude on boundary nodes are realized.The analysis of example results shows that the calculation results of this method have high accuracy and can effectively solve the problem of foundation radiation damping.

关 键 词：人工边界 无限元 Python脚本 波动理论 

分 类 号：O347.4[理学—固体力学]