柴油机配气机构动力学建模与分析  

Dynamic modeling and analysis of diesel engine valve mechanism

作　　者：周煜峰 张海波 张恒运 ZHOU Yufeng;ZHANG Haibo;ZHANG Hengyun(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]上海工程技术大学机械与汽车工程学院,上海201620

出　　处：《上海工程技术大学学报》2021年第3期229-236,共8页Journal of Shanghai University of Engineering Science

摘　　要：发动机配气机构有限元分析作为基础试验的重要支撑,在现代机械设计中非常必要.以直列四缸柴油机配气机构性能优化设计为研究目标,系统计算与确定柴油机热力学与动力学关键参数.首先采用多体动力学方法建立配气机构动力学模型,计算静应力有限元分析结果,得出零部件动力学模型中的模块参数.然后利用Sharp 3D软件对配气机构进行动力学分析,基于分析参数进行配气机构凸轮轴强度分析优化.最后通过有限单元分析功能,对主要的零部件进行力学分析.结果表明:对配气机构动力学模型的分析结果可靠,有利于柴油机配气机构动力学设计和性能参数的改进与优化.Finite element analysis of engine valve mechanism is very necessary in modern mechanical design as an important support for basic experiment.Aiming at the optimal design of the performance for in-line four-cylinder diesel valve mechanism,the key thermodynamic and dynamic parameters of diesel engine were calculated and determined systematically.Firstly,the dynamic model of valve mechanism was established by using multi-body dynamic method,the finite element analysis results of static stress were calculated,and the module parameters in the dynamics model of parts were obtained.Then,Sharp 3D software was used to analyze the dynamics of the valve mechanism,and the camshaft strength of the valve mechanism was analyzed and optimized based on the analysis parameters.Finally,the main parts of the mechanism were analyzed through the finite element analysis function.The results show that the analysis results of the dynamics model of the valve mechanism are reliable,which are beneficial to the improvement and optimization of the dynamics design and performance parameters for the diesel engine valve mechanism.

关 键 词：配气机构 气门组 凸轮 系统动力学建模 

分 类 号：TK413.5[动力工程及工程热物理—动力机械及工程]