在解析表达式的基础上推导考虑双重效应的组合梁单元刚度矩阵。

On the basis of the solution expression, we deduce the composite beam unit stiffness matrix of the dual effects of the displacement.

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板的位移函数取双重级数形式，级数的各项为梁函数的乘积。

Taking the displacement function of plates in the form of a biseries, all terms in series are given by products of functions of a beam.

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尽管它的名字叫曲梁，但实际上这种具有双重要求的杆能用于刚架桥上。

Despite its name beam, but in fact the requirements of this dual rod can be used to frame the bridge.

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