虚功原理的动力学理论与力学组的静力学平衡

虚功原理蝗马动力学的概念和方法应用来解力学组的静力学平衡问题，该部分内容在现行教材中，只从理论上对平衡的必要性和充分性加以证明，未对动力学理论和静力学平衡的内在辩证关系作深入论述。文中就用虚功原理解题的主要步骤和注意事项加以阐述，旨在加深对虚功原理的理论实质的理解，理顺“动”与“静”之间的关系，弥补现行教材中的不足之处，为理论物理教材改革提供依据。

The dialectical relationship between dynamic on virtual work principle and statically balance of mechanic group

Virtual Work Principle is to solve Statically Balance of Mechanics Group by Dynamical introduction and method. This part of content is only testified necessarily and fully in theory , but the inner Dialectical relationship between Dynamical theory and statically Balance is not discussed further .In this paper,the main steps and points for attention on solving problems by virtual work principle are discussed , then purpose of which is to strengthen the further understanding to the Virtual Work Principle theory; to sort out the relationship between dynamics and static; to make up the inadequacy in the textbook perfonmed now, and to provide basics for the reforming on teaching material of the critical physics.