The internal force of statics system,namely the force and the reacting force,occurs in pairs and in-volves two objects.When the principle of virtual displacement is used to solve the internal force of a static me-chanical system,the forces and the reacting force generally have virtual work,it is necessary to determine the virtual displacement separately and calculate the virtual work separately,and which is a complex process.In the report,reconstructing the external constraints of the system and fixing one of the two objects involved in the inter-nal force of the system was proposed.Therefore,the virtual displacement of one force in the force and the react-ing force is zero and the virtual work is zero too,which simplify the calculation process of internal force virtual work.When dismantling the original constraints of the statics system,the corresponding constraint forces should be retained.When rebuilding the system constraints,the system cannot become statically indeterminate.
关键词
虚位移原理/理论力学/约束重构/静力学/系统内力
Key words
principle of virtual displacement/theoretical mechanics/constraint reconstruction/statics/system internal force
维普
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