机械科学与技术2017，Vol.36Issue(6)：841-847,7.DOI:10.13433/j.cnki.1003-8728.2017.0604
考虑配气机构冲击的气缸盖结构动力学仿真分析
Study on Dynamic Simulation of Cylinder Head Considering Valve-train Impact
摘要
Abstract
The impact of valve-train could have a great effect on the stress distribution of cylinder head.Firstly,In order to get the cycle impact load of the cylinder head valve seat resulting from the valve-train,the multi-body dynamics simulation model for a diesel engine valve train was established.After that,it is necessary to analyze the alteration of the stress distribution of cylinder head due to the impact load of valve-train.Based on this results,considering the influence of thermal stresses and cyclic mechanical stress and impact pressure,the combination structure model which containing the cylinder head,the body,cooling water jacket and other related component was established to simulate the transient dynamic response.Finally,it is also required to compare the difference between the two multi-body dynamics simulation models.The results show that the stress distribution of cylinder head which considering the variable impact pressure of the valve-train display a more reliable conclusion.Besides,the stress of cylinder head intake and exhaust valve seat were at significantly augmented and its value can increase by 10％.In addition,stress at the fire deck surface also got augmented and its value can increase to 30 MPa.Meanwhile,the overall stress field of the cylinder head has been varying degrees of increase.关键词
内燃机/气缸盖/配气机构/循环冲击/瞬态动力学Key words
internal combustion engine/cylinder head/valve-train/cycle impact/transient dynamic分类
能源科技引用本文复制引用
杨松林,向建华..考虑配气机构冲击的气缸盖结构动力学仿真分析[J].机械科学与技术,2017,36(6):841-847,7.基金项目
国防基础科研项目(DEDP0103)资助 （DEDP0103）
