基于多目标与多目标协同优化的钢桁架桥结构优化

Structural Optimization of Steel Truss Beam Bridge Based on Multi-Objective and Multi-objective Collaborative Optimization

基于多目标和多目标协同优化算法对钢桁架桥进行了优化设计。在规范要求内,以结构的最大单元有效应力、最大节点位移和结构体积作为目标函数,梁截面尺寸作为设计变量,并使用离散变量的形式进行描述,采用多目标和多目标协同两种优化方法对其设计。计算结果表明,多目标协同优化方案效果更优,研究结果可为今后钢桁架桥的设计提供参考。

The optimization design of steel truss beam bridge is carried out on the basis of multi-objective and multi-objective collaborative optimization.Within specifications,the maximum element effective stress,the maximum nodal displacement and structural volume are taken as objective functions,and the beam section dimensions are taken as design variables,which is described in discrete variables.The multi-objective and multi-objective collaborative optimization are adopted to design the system.The results show that the Multi-objective collaborative optimization scheme has better effect,and the researching results can provide reference for the design of steel truss beam bridge in the future.