某汽油机活塞热机耦合分析及轻量化研究  

Study on the piston thermo-mechanical coupling and lightweight of a gasoline engine

作　　者：郝贤 张艳岗 裴健 郭巨寿 Hao Xian;Zang Yangang;Pei Jian;Guo Jushou(School of Energy and Power Engineering, North University of China, Shanxi Taiyuan, 030051,China;The North General Power Group Co., Ltd., Shanxi Datong, 037036, China)

机构地区：[1]中北大学能源动力工程学院,山西太原030051 [2]北方通用动力集团有限公司,山西大同037036

出　　处：《机械设计与制造工程》2021年第2期16-20,共5页Machine Design and Manufacturing Engineering

基　　金：国家自然科学基金资助项目(51605447);山西省应用基础研究计划项目(201601D021085)。

摘　　要：随着内燃机排放的要求越来越严格,乘用车汽油机将向高升功率、小型化、增压直喷的方向发展,这对活塞的轻量化研究提出更高的要求和挑战。为进一步对汽油机活塞进行优化设计,综合考虑其温度、强度及结构,针对某汽油机活塞轻量化工程问题,进行了该活塞的参数化设计及热机耦合分析,并基于ISIGHT多岛遗传算法建立优化设计方案。优化结果表明:壁厚从7.00 mm变成6.23 mm,顶厚从7.00 mm变成6.82 mm,火力岸高度从6.30 mm变成6.96 mm,最大应力略有增加,且在材料强度极限内,质量从111.95 g变成101.13 g,总质量减少9.7%,达到了轻量化的目的。As the emission requirements of internal combustion engine become more and more strict,the gasoline engine of passenger car will develop towards the direction of high power,miniaturization and turbocharged direct injection.The paper puts forward higher requirements and challenges to the research of piston lightweight.In order to further optimize the design of piston of gasoline engine and comprehensively consider its temperature,strength and structure,the parametric design and thermal-mechanical coupling analysis of piston are carried out for the lightweight engineering problem of the piston of a gasoline engine,and the optimal design scheme is established based on ISIGHT multi-island genetic algorithm.The optimization results show that the wall thickness changes from 7.00 mm to 6.23 mm,the top thickness changes from 7.00 mm to 6.82 mm,the height of fire bank changes from 6.30 mm to 6.96 mm,the maximum stress increases slightly,and in the limit of material strength,the mass changes from 111.95 g to 101.13 g,and the total mass decreases by 9.7%,achieves the goal of lightweight.

关 键 词：活塞 热机耦合 多岛遗传算法 轻量化 

分 类 号：TK412[动力工程及工程热物理—动力机械及工程]