摘要
在实际工程中经常会遇到梁和三维连续体组成的复杂结构,对其进行有限元分析的最佳方案是将其分别离散为梁单元与实体单元进行计算。这两种单元的节点自由度不同,因此即使使得两种单元交接处共用节点,同样可能导致计算结果存在较大的偏差。ANSYS中的约束方程法与MPC法均能实现梁单元与实体单元的正确联接,文章以梁单元与实体单元的接触面垂直接触情况为例分别说明了其原理与步骤,并结合算例对两种方法进行了综合比较,得出了梁单元与实体单元组合建模中MPC法可以取代约束方程法的结论。
Complex structures composed of beams and three dimensional continuous entities often appear in the actual engineering.The optimal scheme of finite element analysis for these structures is dispersing them into beam elements and solid elements.The node DOF of these two kinds of elements are different.Large deviation of calculation result may come out,even if the two kinds of elements share topology.Constraint equation and MPC can realize beam elements and solid elements correct connections.Takes both the beam element and the solid element vertical contact as example,this paper illustrates the principles and steps respectively.After comprehensive comparison,the authors draw a conclusion： MPC can replace constraint equation in the compositional modeling of beam elements and solid elements.
出处
《机械设计与研究》
CSCD
北大核心
2013年第4期61-63,共3页
Machine Design And Research
基金
上海市宝山区科技委员会资助项目(CXY-2011-01)
