刚体的平衡理论问题  

THE THEORETICAL PROBLEM OF RIGID BODY EQUILIBRIUM

作　　者：战永杰[1] 

机构地区：[1]东北师大物理系

出　　处：《东北师大学报（自然科学版）》1992年第1期51-54,62,共5页Journal of Northeast Normal University(Natural Science Edition)

摘　　要：本文首先阐明力系主矢=∑_1=0和力系主矩=∑_i=0是刚体静止平衡的必要充分条件,但这一条件却不完全适合于转动平衡情况。然后,用欧勒动力学方程推导出刚体角加速度和力系主矩同时取零的条件。在此基础上,给出普遢适用的刚体平衡定义和平衡条件。First the principal vector of a force System R= =0 and the principal momet of a fore System ==0 are explained in this paper,which is a necessary and a suffici- ent condition of the equilibrium of rigid body,but the condi- tion is unidealy applicable to the case of the rotation equilib- rium. However,the angular accelration of a rigid body derived from Euler's Kinetics equation is condition along with the principal moment of force System. On the basis of that,it gives a generaly appicable definion about the rigid body equilibrium and the equilibrim condition.

关 键 词：刚体 平衡 动力学方程 

分 类 号：O313.3[理学—一般力学与力学基础]