码头结构布局优化及其离散复合形算法

码头结构的合理布局（指纵、横梁及桩的数目和布置）对其经济性有很大影响，可通过布局优化设计为码头结构的初步设计提供最优布局方案。研究了以最小造价为目标，以纵横梁及桩数为布局变量的全直桩梁板码头结构布局的优化设计，给出约束非线性混合离散变量优化模型，采用离散复合形法直接求其离散最优解。算例表明，本文为这种码头优化布局方案的确定提供了一个快捷实用的方法。

Structural Arrangement Optimization of Pile Piers and Discrete Complex Method

Rational arrangement of pile piers (the number and disposition of the longitudinal and lateral beams and piles) has considerable effects on their economy. In this paper the optimal arrangement scheme for the initial design of pile piers is provided through structural arrangement optimization. The arrangement optimal design has been studied of plate girder pile piers with vertical piles in which the least cost is the objective and the number of longitudinal and lateral beams and piles is the design variable. The model of mixed discrete constrained nonlinear optimization for this purpose is given and the discrete optimum solution to this problem is obtained with discrete complex method. Numerical examples show that the present method is time saving and practical.