有限元中体壳单元的耦合问题研究  

Coupling problem study of solid element and shell element in finite element

作　　者：谢最伟[1] 吴新跃[1] 万强[1] 

机构地区：[1]海军工程大学船舶与动力学院,湖北武汉430033

出　　处：《机械设计》2011年第3期91-93,共3页Journal of Machine Design

摘　　要：由于转动自由度的不连续,使得体单元与壳单元之间的耦合成为有限元计算中比较难以解决的问题。通常在工程实践中采用MPC(Multipoint Constraint)法。文中提出了约束体壳单元连接处共用节点的某一旋转自由度的方法,通过与MPC法的计算对比,证明了该方法在便于实现的同时,同样有着很高的精确度。这为有限元分析中体壳单元的耦合处理提供了一种很好的借鉴方法。The coupling between the solid elements and the shell elements has become a difficult problem in finite element due to the discontinuousness of rotational freedom.This problem is often solved by MPC（Multipoint Constraint） method in engineering practice.The method that constrains a certain rotational freedom of the nodes which are shared by solid element and shell element is advanced.By comparing it with the MPC method,it is proved that the method utilized in this paper is easy to realize and has a similarly high accuracy.A good reference method to solve the coupling of solid element and shell element in finite element analysis can be obtained from the method mentioned in this paper.

关 键 词：有限元 体单元 壳单元 耦合 

分 类 号：TB115[理学—数学]