基于交互式决策算法的桁架式门机结构系统动态优化设计

INTERACTIVE DECISION-MAKING ALGORITHM BASED DYNAMIC OPTIMIZATION DESIGN OF TRUSS GANTRY CRANE STRUCTURE

提出了一种基于交互式决策算法的桁架式门机结构系统动态优化设计方法。通过模态分析及谐响应分析确定影响结构动态性能的关键模态固有频率。将结构总质量、杆件静强度、结构静刚度以及关键固有频率作为目标,对结构设计参数进行灵敏度分析,筛选出对桁架门机结构性能影响较大的设计参数。以结构总质量为最终优化目标,同时以固有频率、结构静强度、静刚度、满意度等作为约束条件。利用交互式决策算法结合有限元分析软件对桁架式门机结构进行优化计算,实现了决策者与系统模型之间信息的反复交换,使优化结果不断向决策者要求靠近。通过此种动态优化方法,不仅使结构质量减少10.9%,还提升了5.98%的结构动态性能,节约了制造成本。

Presents a crane optimization method based on interactive decision-making algorithm. Sensitivity analysis was done for all structural parameters to decide the dynamic optimum design variables. Mass of the structure was taken as the optimization objective. The restraints to the model include harmonic response analysis, static strengths, static stiffness, satisfactory degree and key modal frequency which was determined based on modal analysis etc. Information was exchanged between decision-makers and the systematic model through the interactive decision-making algorithm which make the result more satisfactory. A design case shows that the dynamic performance is increased by 5. 98% with a decrease in mass by 10. 9%.