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本文通过对桅杆结构中纤绳及杆身的非线性分析，建立了桅杆结构空间自由振动方程，应用子空间迭代法可求得任意个低阶振型和频率。对不同风向及不同纤绳初拉力下桅杆结构的动力特性进行分析，与试验研究比较表明，理论计算结果与试验结果吻合良好。
In this paper, through the non-linear analysis of the fiber rope and the shaft in the mast structure, the space free vibration equation of the mast structure is established. By using the subspace iteration method, any number of low-order vibration modes and frequencies can be obtained. The dynamic characteristics of the mast structure under different wind direction and initial tension of different fiber ropes are analyzed. Compared with the experimental study, the theoretical calculation results are in good agreement with the experimental results.