基于镜面反射算法的机械产品结构稳健优化设计

Robust Optimization Design for Mechanical Structure Based on Specular Reflection Algorithm

为提高机械产品的质量和可靠性,降低制造成本,以箱形截面的悬臂结构为研究对象,采用智能优化领域中的最新研究成果-镜面反射算法,综合结构优化设计和稳健设计两种先进的结构分析方法,对悬臂梁结构进行稳健优化设计研究。在对机械产品结构进行轻量化研究的前提下,探究实际环境中某些具有非确定设计特征的参数的影响,保证设计目标不会因设计变量的微小变化而产生较大波动,提高产品的稳健性。在结构优化模型中引入灵敏度指标的概念,构建能够同时满足结构轻量化和稳健性的多目标优化问题。考虑环境及制造条件的影响,将设计变量参数离散化,采用MATLAB编写专用优化程序对悬臂梁结构进行稳健优化分析,数值算例的计算结果表明,镜面反射算法适合于求解结构稳健优化设计问题,镜面反射算法是一种方便、实用的结构设计工具,这里的研究为金属结构的设计提供了新思路。

In order to improve the quality and reliability of mechanical products,find the way to reduce the manufacturing cost,we focus on the research of box section cantilever structure and adopt the newest fruit(Specular Reflection Algorithm)in the field of intelligence optimization,combining with two kinds of advanced methods for solving the problem of robust optimization design of the cantilever,the two methods are optimization design and robust design respectively.On the premise of structure lightweight design,a robust optimization design are developed to obtain an optimum value insensitive to variations on the variables within the feasible region by consideration of the uncertain,so that the quality of products can be improved.Incorporate the sensitivity index into the model of structure optimization,transforming the robust optimization into multi-objective optimization problem under the requirements of design.The influence of environment and manufacturing conditions should be taken into consideration,discrete the design variables,using MATLAB to compile the professional procedure for robust optimization analysis of cantilever structure.Finally,a numerical example is given,the results shows that SRA is a kind of convenient and practical tool for design of struc-ture and it is suitable for solving the problem of robust optimization design,research of this paper provides a new train of thought for the research of metal structure.