基于中心引力算法的箱型梁面几何尺寸参数优化

Optimization Design of Crane Girder Based on Central-Force-Optimization Algorithm

针对起重机箱型截面梁截面尺寸多变量有约束的优化设计问题,提出采用中心引力现代优化设计算法来优化设计主梁截面。首先根据起重机主梁的箱型截面几何参数以及主梁受力特点,以应力、扰度和工艺等约束条件建立主梁质量最轻的目标优化函数。采用罚函数法将有约束优化转化为无约束优化,并依据类天体运动的中心引力算法对箱型梁截面进行优化。仿真结果表明,该算法能够在整个可行解空间进行寻优,有效避免陷入局部最优解。优化后的主梁质量比传统设计方法减轻14.5%左右。

A modern central-force-optimization algorithm is usedfor the crane main girder box section size optimization design which is a multivariable and constrained complex problem. First of all, thegirder quality the lightest target optimization function and constraint conditions are establishedaccording to the crane girder of box section geometric parameters and characteristics of cranegirder. The penalty function methodis used to make the constrained optimization into unconstrained optimization. The central-force-optimization algorithm on the basis of class object movement of star is optimized for the crane girder of box section. Results show that the algorithm can carry on the optimization in the whole feasible solution space, effectively avoiding into local optimum. The optimized girder quality reducesabout 14.5% than traditional design method.