虚功原理证明采用不同基本结构的力法

刘宇晓

摘要：本文以兩次超静定结构为例，用虚功原理建立了拥有3个基本结构的力法，并给出这种新力法的正则方程。以此推广至n次超静定结构。

关键词：基本结构；力法；虚功原理；叠加原理

Abstract Taking two degree of indeterminate structures as example，this paper uses the principle of virtual work to derive the force method，including three primary structure .The canonical equations are also provided to this new force method， to spread it to n degrees of indeterminate structures.

Key words primary structure；force method；the principle of virtual work；superposition formula