The method of virtual work is in common use.

虚功法是常用的方法。

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Theoretical studies of curved girders mainly adopted the methods of balanced method, energy method and variation-based method of virtual work (displacement).

曲线梁的理论研究主要采用平衡法、能量法以及基于变分原理的虚功(位移)方法。

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Theoretical studies of curved girders mainly adopted the methods of balanced method, energy method and variation-based method of virtual work (displacement).

曲线梁的理论研究主要采用平衡法、能量法以及基于变分原理的虚功(位移)方法。

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