基于宏观空穴理论的主轴承多目标优化设计  

Multi-objective Optimization of Journal-Bearing System Based on H-S Cavitation Theory

作　　者：何振鹏 谢海超 仲崇高 谢伟松[3] 丁坤英 申倩 刘佳航 王伟韬 HE Zhenpeng;XIE Haichao;ZHONG Chonggao;XIE Weisong;DING Kunying;SHEN Qian;LIU Jiahang;WANG Weitao(Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance,Civil Aviation University of China,Tianjin 300300,China;Aeronautical Engineering Institute,Civil Aviation University of China,Tianjin 300300,China;School of Science,Tianjin University,Tianjin 300300,China)

机构地区：[1]中国民航大学天津市民用航空器适航与维修重点实验室,天津300300 [2]中国民航大学航空工程学院,天津300300 [3]天津大学理学院,天津300300

出　　处：《润滑与密封》2018年第11期93-101,107,共10页Lubrication Engineering

基　　金：国家自然科学基金项目(51505482);天津市自然科学基金(18JCQNJC05400);中央高校基本科研基金项目(3122018D014);中国民航局科技计划资助项目(MHRD20160106);福建省清洁燃烧与能源高效利用工程技术研究中心开放课题(KF201703)

摘　　要：为有效地降低内燃机轴承的润滑油泄流量,提高其油膜支撑能力,建立考虑宏观空穴效应的曲轴-主轴承系统的流体动力润滑模型,并根据不对中角度下最大油膜压力验证了宏观空穴模型的正确性;采用宏观空穴模型对内燃机轴颈-轴承系统的空穴区域及空穴区域密度进行预测;基于正交试验设计和最优拉丁超立方试验设计,研究不同参数及参数耦合对轴承润滑性能的影响;结合带精英策略的非支配排序遗传算法(NSGA-II),以润滑油泄流量和油膜支撑力矩为优化目标,对内燃机主轴承性能进行优化设计。研究结果表明:仅仅结合正交试验分析单因素影响权重是不够的,参数的交互影响权重较大,在进行参数权重影响分析时应综合考虑参数间的交互影响;在润滑油泄流量最小和油膜支撑力矩最大多目标优化中形成了一个最优解前沿,得到了一个关于多目标优化的解集。In order to reduce the oil leakage of the internal combustion bearing and improve the oil film loading capacity,a hydrodynamic lubrication model for journal-bearing system considering H-S cavitation effect was established, and the H-S cavitation model was verified with the traditational model through peak oil film pressure.The cavitation zone and the density of the cavitation zone of the journal-bearing system were analyzed with the H-S cavitation model.Based on the orthogonal test design and optimal Latin hypereube design,the effect of the parameters and parameter coupling on the lubrication characteristics was analyzed.The fast nondominated sorting genetic algorithm （NSCA-II） was coupled to carry out the multi-objective optimization of the bearing performances such as loading capacity and oil leakage.The results show that it is not precise enough to evaluate the weight of the parameter only by orthogonal test, the effect of parameters coupling is larger, so the parameters coupling should be taken into account when analyzing the influence of parameters weight. A flont edge of optimal solution is formed in the multi-objective optimization of minimum oil leakage and maximum film loading capacity,and a set for the multi-objective optimizatione is obtained.

关 键 词：内燃机 主轴承 宏观空穴 多目标优化 

分 类 号：TH133.3[机械工程—机械制造及自动化]