基于可靠性稳健优化设计材料选择  

Design Material Selection Based on Reliability Robust Optimization

作　　者：王发展[1] 吕勤良 郑建校[1] WANG Fa-zhan;LV Qin-liang;ZHENG Jian-xiao(Xi'an University of Architecture and Technology College of Mechanical and Electrical Engineering,Shanxi Xi’an710055,China)

机构地区：[1]西安建筑科技大学机电工程学院,陕西西安710055

出　　处：《机械设计与制造》2021年第3期153-156,共4页Machinery Design & Manufacture

基　　金：陕西省自然科学基金资助(2012JM7015);陕西省教育厅专项科研项目资助(14JK1410)。

摘　　要：针对工程实际中零部件设计时的选材方法不固定,理论不完善等问题,提出了一种将预选材料的强度作为选材设计变量,以稳健优化设计为选材原则的新方法。基于可靠性四阶矩理论和灵敏度分析,建立目标对象的可靠性稳健优化模型,并利用数学计算软件MATLAB优化工具箱提供的fmincon函数对有约束优化问题进行求解,最终得出零部件可靠性保持在0.9999的情况下,稳健性得到增强的要求中给出最适合的设计材料。随后通过一个实例验证了本方法的可行性和有效性。Aiming at the problem in engineering practice that the method of material selection in component design is not fixed and the theory is imperfect,a new method of selecting the strength of pre-selected materials as the design variable of the material selection and the rational optimization design as the material selection principle is proposed.Based on the reliability fourth-order moment theory and sensitivity analysis,the reliability robust optimization model of the target object is established,and the constrained optimization problem is solved by using the fmincon function provided by the mathematical calculation software MATLAB optimization toolbox,in the end,the reliability of the component is maintained at 0.9999,and the most suitable design material is given in the requirement of enhanced robustness.Subsequently,the feasibility and effectiveness of the method are verified by an example.

关 键 词：四阶矩 稳健优化设计 MATLAB 材料选择 

分 类 号：TH16[机械工程—机械制造及自动化] TB114.3[理学—概率论与数理统计]