一种由整体到局部的机械结构分层优化模型  

A Global to Local Hierarchical Optimization Model of Mechanical Structures

作　　者：张氢[1] 高倩[1] 秦仙蓉[1] 陈丹丹[1] 

机构地区：[1]同济大学机械工程学院机械设计及理论研究所,上海201804

出　　处：《机械科学与技术》2010年第11期1433-1437,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(50975207);十一五国家科技支撑计划项目(2007BAF10B00)资助

摘　　要：结合机械结构设计的一般过程,提出了一种"整体层-局部层"的两层的优化模型。首先在"整体层"对整个机械系统的总体设计方案进行优化,然后在"局部层"完成主要结构的优化。阐述了两层设计变量及目标函数划分方法,给出各层优化模型的一般表达式,在此基础上讨论了该分层模型的协调和收敛方法,最终得到完整的机械结构整体优化策略。文中以7500×103kg浮吊金属结构的整体优化为例,详细讨论了高维、多目标机械结构整体优化建模过程。结果表明笔者提出的分层优化模型可行、有效,可适用于大型复杂机械结构的整体优化问题。We present a ＂global-local＂level optimization model according to the mechanical structure design process. First,the general plan is optimized in the＂global-level＂,then the optimization of the structures is completed in the＂local-level＂. The dividing method of design variables and objective functions of the two levels is specified,and the general expressions of each level are given. On this basis,the coordination and convergence methods are discussed,and a global optimization strategy for mechanical structures is completed. Finally,the structure optimization of 7500 ×10^3 kg floating crane is given as an example,and the modeling process of a high-dimension and multi-objective global system is detailed. The results show that the optimization model and method in this paper are valid and effective for large complex mechanical structures.

关 键 词：结构优化 整体优化模型 分层策略 整体层-局部层 多目标 浮吊 

分 类 号：TP301[自动化与计算机技术—计算机系统结构] TH122[自动化与计算机技术—计算机科学与技术]