机械科学与技术2018，Vol.37Issue(3)：344-351,8.DOI:10.13433/j.cnki.1003-8728.2018.0303
热机耦合作用下缸盖热状态影响因素研究
Research on Influence Factors of Cylinder Head Thermal State with Thermo-mechanical Coupling
摘要
Abstract
To study the engine cylinder head thermal state with the thermo-mechanical coupling,the temperature,the coupling stress and the cylinder head thermal fatigue were analyzed making use of fluid-structure interaction.Based on the Latin hypercube method,the elliptical basis functions neural network model was established to describe the relationship among the burning intensity,coolant flow parameters,mechanical load,the maximum coupling stress and the low-cyclic fatigue factor,and the main impact factors were studied.The results show that in the burning intensity the temperature and heat transfer coefficient of cylinder have a large impact on the maximum coupling stress and the low-cyclic fatigue factor.Improving the inlet temperature of coolant can decrease the lowcyclic fatigue factor,but increase the temperature of cylinder head.Improving the inlet flow of coolant can decrease the temperature of cylinder head,but increase the low-cyclic fatigue factor.The maximum explosive pressure has significant effect on the low-cyclic fatigue factor,and the stress pretension force has significant effect on the maximum coupling stress.关键词
缸盖/流固耦合/近似模型/热状态Key words
cylinder head/fluid-structure interaction/approximate model/thermal state分类
能源科技引用本文复制引用
张俊红,胡欢,徐喆轩,赵永欢,王杰,戴胡伟..热机耦合作用下缸盖热状态影响因素研究[J].机械科学与技术,2018,37(3):344-351,8.基金项目
国家重点新产品计划项目(2016YFD0700701)资助 （2016YFD0700701）
