非线性规划法在铁塔结构设计中的应用

Application of Nonlinear Programming Method in the Tower Structure Design

应用非线性规划法对铁塔进行形状优化，给出了铁塔在多工况、多约束条件下形状优化的一种分层算法。第一层固定节点坐标进行截面优化；第二层，以节点坐标为设计变量，同时考虑截面变化，采用非线性规划中的可变容差法进行优化。两层优化交替进行，直至满足收敛条件为止。经算例验证，该方法收敛平稳，使用有效。

The tower shape is optimized by nonlinear programming method. An hierarchical algorithm for the tower shape optimum is given. In the first hierarchy, the crosssections are optimized while the joint points are fixed. In the second hierarchy, the joint points are optimized while the crosssections are changed. The optimization is processed alternately in these two hierarchies, until the convergent conditions are met. The examples show that this method can converge smoothly and effectively.