摘要
根据多学科优化设计理论,计算活塞在静止状态时受热负荷和机械负荷共同作用下的应力值,计算结果表明耦合作用中以机械负荷为主。提出了基于正交试验设计的优化搜索策略,优化后活塞质量减少了4.6%。分析了火力岸高度、顶部厚度和销座间距对活塞应力及温度场的影响程度:它们对活塞所受耦合应力的影响和单独承受机械应力的影响趋势和程度是基本一致的,火力岸高度对活塞应力影响最大,三个因素对活塞温度的影响都不大。
Based on the principles of MDO, the stress by coupling the heat and the mechanical load was computed. The results show that the mechanical load is the major stress. A searching strate- gy of multidisciplinary design which was based on orthogonal distribution design of experiments was put forward. After the optimization, the weight of piston decreases 46%. Analyzing the sensitivity of design variables, the effects of the three factors（field of fire,thickness of top,space between block） on coupling stress of piston and that on mechanical stress of piston are almost the same. Among the three factors, the effect of field of fire is the most obvious one. The three factors have no obvious effect on the temperature of piston.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2009年第9期1123-1125,共3页
China Mechanical Engineering
基金
重庆市重大科技攻关项目(CSTC
2007AA6009)
重庆市自然科学基金资助项目(CSTC
2007BB3407)
关键词
活塞
多学科优化设计
耦合作用
正交试验设计
piston
multidisciplinary design optimization （MDO）
coupling effect
orthogonal de-sign of experiment
