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；
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。
In spite of the very close affinity between the variational theorems and the principle of virtual work the study of the former is worth-while.
尽管变分定理与虚功原理之间有很紧密的相似关系，然而对前者的研究仍然是有价值的。
应用推荐