ABAQUS退化的动力无限元单元  

Degenerate Dynamic Infinite Element Based on ABAQUS

作　　者：邹烨 ZOU Ye(Hunan Communications Research Institute Co.,Ltd.,Changsha,Hunan 410011,China)

机构地区：[1]湖南省交通科学研究院有限公司,湖南长沙410011

出　　处：《水利与建筑工程学报》2023年第6期122-127,共6页Journal of Water Resources and Architectural Engineering

摘　　要：针对ABAQUS中的三维无限元单元只适用于有限域为六面体单元的情况,提出一种退化无限元单元,推导该退化无限元单元的等效节点力计算公式,以及对相应的地震动输入方式进行分析。数值模型试验结果表明:该单元无需进行二次开发即可用于有限域采用四面体单元的情况,能适应更普遍的模型网格剖分形式。该退化单元具有良好的精度及更好的网格适应性,能广泛用于动力问题的分析。A degenerate infinite element is proposed for the case where the three-dimensional infinite element in ABAQUS is only suitable for finite fields using hexahedral elements.This element can be used in the case of using tetrahedral elements in finite regions without redevelopment,and can adapt to more general mesh forms of the model.A calculation formula for the equivalent nodal forces of the degenerated tetrahedral infinite element is presented,and the seismic input methods are analyzed accordingly.The numerical model test results demonstrate that the degraded element has good accuracy and better mesh adaptability,and can be widely used for the analysis of dynamic problems.

关 键 词：退化无限元单元 六面体无限元单元 地震动输入 等效节点力 ABAQUS 

分 类 号：TU4[建筑科学—土工工程]