摘要
为研究机械结构的轻量化设计,提出零件结构优化的权重法,即几何模型的建立、有限元模型的分析、权重法概念构型、基于权重法的去除部分四部分构成。以空调支架为优化对象,分别以权重法和多目标优化设计为优化方法,对其进行轻量化研究。权重法对支架进行整体结构优化,对其传递效率差的材料进行去除。多目标优化为输出参数随输入参数而变化的响应,在目标驱动优化下得到优化的输入参数组合。对比两种优化方法的结果,基于权重法的空调支架优化结果比较合理。优化后空调支架的质量减少13.83%,最大应力基本无变化,在满足使用条件下,达到轻量化的目的。验证了权重法优化的合理性,为机械结构的轻量化提供有效方法。
In order to study the lightweight design of mechanical structure, the weighting method of part structure optimization is proposed, which is the establishment of geometric model, the analysis of finite element model, the conceptual configuration of weight method and the removal of four parts based on weight method. Taking the air-conditioning bracket as the optimization object, the weighting method and multi-objective optimization design are used as optimization methods respectively, and the lightweight research is carried out. The weight method optimizes the overall structure of the stent and removes materials with poor transfer efficiency. Multi-objective optimization is the response of the output parameters as a function of the input parameters, and the optimized input parameter combination is obtained under target-driven optimization. Comparing the results of the two optimization methods, the optimization results of the air conditioning bracket based on the weight method are reasonable. After optimization, the quality of the air-conditioning bracket is reduced by 13.83%, and the maximum stress is basically unchanged. Under the conditions of use, the purpose of weight reduction is achieved. The rationality of the weight method optimization is verified, and an effective method for the weight reduction of the mechanical structure is provided.
作者
杨世明
郭翠敏
马庆国
黄飞校
YANG Shiming;GUO Cuimin;MA Qingguo;HUANG Feixiao(Mechanical Engineering College,Tianjin Polytechnic University,Tianjin 300387,China)
出处
《机械设计与研究》
CSCD
北大核心
2019年第5期121-125,共5页
Machine Design And Research
关键词
空调支架
权重法
多目标优化
轻量化
air conditioning bracket
weight method
multi-objective optimization
lightweight
