本文指出，在一定的条件下，功的互等定理等价于位移叠加原理。
This paper points out that on certain condition the reciprocal theorem is equivalent to the superposition principle of displacements.
本文提出的计算方法是功的互等定理的新应用，具有概念清晰、步骤简捷的特点。
In this paper we mentioned a new way of applying the reciprocal theorem of work, which is clear in concept and simple in procedure.
从虚功原理出发，证明了薄板小挠度弯曲问题的功的互等定理，并由此推出了求解矩形薄板自然频率的公式。
Using the virtual work principle, this paper proved the reciprocal theorem of work of thin plates with small deflections, and obtained the formula of the natural frequency of square plates.
用推广功的互等定理法，给出了求解复杂边界条件矩形板的弹性力学平面问题的一般近似解，并给出了计算实。
The method of reciprocal theorem is extended to find common probable solutions of plane problems of elasticity of the rectangular plate with various edge conditions.
用推广功的互等定理法，给出了求解复杂边界条件矩形板的弹性力学平面问题的一般近似解，并给出了计算实。
The method of reciprocal theorem is extended to find common probable solutions of plane problems of elasticity of the rectangular plate with various edge conditions.
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