摘要
基于约束函数法的二维节理非线性有限元分析,推导出大位移三维接触单元的刚度矩阵及非线性方程的迭代步骤,并引入了约束函数将非线性接触模型光滑化,使方程通过Newton法进行迭代求解,以节点接触应力为基本未知量,提高了接触应力的计算精度。
Based on the plane joint nonlinear finite element analysis, the stiffness matrix of three-dimentional contact problem under large-displacement effect is deduced, as well as the iterative step. The nonlinear contact model gets smooth by introducing the constrain function, and thus the nonlinear formula can be solved using the Newton Iteration Method. Perceiving the node＇s contact stress as basic unknown variables, the computational accuracy is improved.
出处
《水电能源科学》
北大核心
2009年第3期104-106,109,共4页
Water Resources and Power
关键词
接触问题
约束函数法
非线性
三维
大位移
contact problem
constrain function method
nonlinear
three-dimentional
large-displacement
