According to the principle of virtual work, the finite element equations of the contact problem composed of gap elements are obtained. The calculating procedure with gap element method and the features of it are all presented.
文中给出了间隙元法在空间可动机构接触问题中的应用,推导了其几何边界条件和力学边界条件,利用虚功原理推导了含间隙元弹性接触问题的有限元方程式,给出了其数值解法的迭代步骤,并指出了利用间隙单元进行分析的特点。
参考来源 - 开启式屋盖结构可动部件研究及风振相应分析·2,447,543篇论文数据，部分数据来源于NoteExpress
The general form of J-integral conservation law in three dimensions has been derived from the principle of virtual work.
本文由力学的普遍原理——虚功原理推导出了三维情况下J积分守恒的一般形式；
Stiffness matrix and load vector were founded on developing eigen-equation for wall element and applying principle of virtual work.
通过推导单元特征方程的解及应用虚功原理，建立了墙元的刚度矩阵和荷载向量。
Based on balancing equation of framework of rock and soil and the principle of virtual work, the stress balancing equation can be acquired.
根据岩土体骨架的平衡方程和虚功原理建立应力场平衡方程。
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