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提出了一种输电塔主材统材划分的优化方法:首先通过分析得到每段统材截止位置的变化区间表达式,可以发现每段杆件截止点的界限都与已经完成划分的杆件长度相关;鉴于此,引入动态规划的概念,利用递归方法得到所有可行的统材划分方式;最后在静定化假设的基础上,依次按所有方案进行选材,对比得到最优的设计。一个翔实的算例表明使用该算法可以求得更轻的塔重,同时发现塔重随统材段数的增加而减小,各段最优截止点率先出现在外荷载变化较大的位置等符合一般工程实际的规律。
An optimization method for dividing the main material and the main material of transmission tower is proposed. First, by analyzing the interval expression of the cut-off position of each piece of material, it can be found that the cut-off point of each rod is related to the length of the rod that has been divided. In view of this, the concept of dynamic programming is introduced and all feasible methods for dividing the system of solid materials are obtained by using the recursive method. Finally, on the basis of the staticization assumption, all the programs are selected in sequence to obtain the optimal design. A detailed example shows that the algorithm can be used to obtain a lighter tower weight, and found that the weight of the tower decreases with the increase of the number of sections, and the optimal cut-off point of each section first appears in the position where the external load changes greatly, The actual law of the project.