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本文提出了刚架在面内及面外自由振动时的传递矩阵，同时还推得了在分支点的传递矩阵．通过实际的计算，证实了该方法是一种具有较高精确度且简便易行的方法．
In this paper, the transfer matrix of a free-standing frame with free vibration in-plane and out-plane is proposed, and the transfer matrix at the branch point is derived. Through the actual calculation, the method is proved to be a highly accurate and easy-to-use method.