根据输电线路钢管杆的受力特点，将钢管杆简化成受复杂载荷作用的变截面梁的纵横弯曲和扭转问题，并采用传递矩阵方法进行分析求解。
Based on the stress performance of steel pole of transmission line, the steel pole is simplified as a matter of cross bending and torque with variable sections and complex loads.
分析了大型多支承变刚度回转窑的力学特征，建立了回转窑轴线弯曲时各托轮受力的力学模型。
The mechanical character of large-scale variable-stiffness rotary kiln under multi-supporting system is analyzed, the mechanical model is set up when the axes is bending.
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