从力矩分配法的原理出发，利用数列理论，导出了杆端弯矩计算公式。
Starting with the principle of moment distribution method, the paper applies sequence theory to derive the formula of rod-end bending moment.
应用矩阵力矩分配法推导出了力矩二次分配法的误差计算公式。
By applying matrix moment distribution method, we deduce that error calculation formula of moment quadratic distribution method.
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