摘要
以同一变形体的两个彼此独立的状态——变形协调状态和平衡状态，建立外力虚功和虚应变能的表达式，给出了虚位移原理是变形连续体平衡的必要条件与充分条件的证明。明确了虚位移原理的变分约束条件和变分自然条件。
Equations for the virtual work of imposed force and virtual energy of strain are set up in this paper,they are based on two independent factors:the condition of compatibility and the equations of equilibrium.It is demonstrated that the virtual principles of displacement is the full and essential condition for continuously variable body for variable body.The boundary condition of restriction and the natural condition of variation for the virtual principle of displacement are given too.
出处
《哈尔滨建筑大学学报》
1998年第1期124-129,共6页
Journal of Harbin University of Civil Engineering and Architecture
关键词
虚位移
外力虚功
虚应变能
变形体力学
virtual work of imposed force
virtual energy of deformation
virtual displacement
