摘要
首先建立了某卡车六缸发动机三维实体模型,利用计算流体力学的方法得到了单缸工作压强随气缸容积和曲轴转角变化的关系,之后建立了该六缸发动机的多体动力学模型.以单缸工作压强和曲轴转角之间关系为动力输入,利用有限元的方法计算了该发动机各气缸产生的功率、曲轴和连杆上关键部位的关节力变化曲线,并且对发动机工作过程中连杆应力分布情况进行了分析.本文的方法可应用于一般发动机的热力学-动力学分析,得到的结论对卡车发动机的设计具有一定的指导意义.
A three-dimensional geometric model of a truck’s six-cylinder engine is established.The relationship that the working pressure of single cylinder changed with crankshaft angle and cylinder volume is calculated by computational fluid dynamic.The multi-body dynamic model of the six-cylinder engine is established.Taking the relationship between the working pressure of single cylinder and the angle of crankshaft as the dynamic input,the power produced by each cylinder,the force and stress change curve of the key parts on the crankshaft and connecting rod are calculated by the finite element method.The distribution of the stress of connecting rod during the working process of the cylinder is also analyzed.The method in this paper can be applied to the dynamic analysis of general engines,and the conclusion has guiding significance for the design of truck engines.
作者
田甜
李长玉
胡泽澍
刘燚
苏子心
TIAN Tian;LI Changyu;HU Zeshu;LIU Yi;SU Zixin(School of Automotive and Traffic Engineering,Guangzhou City University of Technology,Guangzhou 510800,China)
出处
《河南科学》
2021年第8期1217-1222,共6页
Henan Science
基金
广东省特色创新项目(自然科学类)(2017KTSCX218)
广东省青年创新类人才项目基金资助(2016KQNCX226)。
关键词
卡车
发动机
动力学
有限元法
truck
engine
dynamics
finite element method
