The accuracy of calculation is checked by the reciprocal theorem of work, and the result of vertical pile is compared with other's.
计算的精度用功的互等定理来检查，并将直桩的结果与别人的直桩结果作比较。
In this paper we mentioned a new way of applying the reciprocal theorem of work, which is clear in concept and simple in procedure.
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。
Based on the reciprocal theorem of work, the paper presented a method to calculate influence lines of internal forces with finite element.
利用功的互等定理，推出适用于有限元求解内力影响线的方法。
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.
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.
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。
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