一个结构静力学问题的虚位移原理求解及其扩展

Solution for A Problem of Structural Statics by Principle of Virtual Displacement and Its Expansion

根据一个平面桁架的结构静力学问题,提出利用虚位移原理求解该问题时的刚体虚位移计算的一个新命题,并给出该命题的证明.利用该命题正确给出了该桁架内力计算的求解过程.该命题丰富了虚位移原理的应用,为在满足特定条件下虚位移的计算以及静力学问题的求解奠定了基础.

A novel proposition on computing virtual displacements of a rigid body which can be used in solving a problem of a planar truss structural statics,and the procedure of proving this proposition is given out.The problem is solved out by employing the given proposition.This proposition enriches the application of the virtual displacement principle,and sets a foundation for solving the problems of statics under the specific cases.