基于灵敏度附加目标函数的起重机主梁稳健优化设计

STRUCTURE AND ROBUST OPTIMIZATION DESIGN BASED ON ADDITIONAL OBJECTIVE FUNCTION OF THE SENSITIVITY

针对存在于起重机金属结构设计中的不确定性因素,提出了一种基于灵敏度分析的起重机金属结构稳健优化设计方法,建立了基于灵敏度附加目标函数及灰色关联度理论的起重机金属结构多目标稳健优化设计模型。以某桥式起重机主梁为研究对象,在对其各性能进行灵敏度分析的基础上,结合Matlab优化工具箱,应用该模型进行起重机主梁的稳健优化设计,结果显示:当考虑结构的非确定性因素时,所构建的稳健优化设计模型和灰色关联度的多目标优化解法可以在保证起重机主梁稳健及安全的前提下实现结构的轻量化设计,为其它复杂结构的稳健优化提供一定的技术指导。

A robust-optimization-design method based on sensitivity＇s analysis of the crane metal structure is described. It considers uncertain factors existing in the design of crane metal structure. And the multi-objective robust-optimization design model about crane metal structure is constructed on the bases of the sensitivity and the grey correlation theory. Taking the bridge crane girder as the research object and getting the best solution of the multi-objective optimization problems by grey-absolutecorrelation degree and the MATLAB optimization-design toolbox on the basis of the sensitivity analysis for its each performance.The results shows that when considers the uncertain factors of structure,the model about robust optimization design constructed in this paper and the grey correlation degree of multi-objective optimization method can ensure the steady and safety,and also can lose weight of the crane girder structure. The paper provides the technical guidance for the robust optimization of the other complex structure.