基于多体动力学的柴油机机体振动分析  

Vibration analysis of a diesel engine block based on multi-body dynamics

作　　者：白颖[1] 莫莉萍[1] 张希腾 BAI Ying;MO Liping;ZHANG Xiteng(Changzhou Institute of Mechatronic Technology,Changzhou 213164,China;College of Mechanical and Electrical Engineering,Hohai University,Changzhou213022,China)

机构地区：[1]常州机电职业技术学院,常州213164 [2]河海大学机电工程学院,常州213022

出　　处：《现代制造工程》2021年第3期106-112,145,共8页Modern Manufacturing Engineering

基　　金：江苏省高职院校教师专业带头人高端研修项目(2019);江苏省青蓝工程学术带头人资助项目(JSQL2020)。

摘　　要：以降低某柴油机振动为目标对柴油机机体进行结构改进,并对改进后的机体进行振动分析。使用HyperMesh软件生成机体和曲轴的高质量有限元模型,结合ANSYS软件进行机体模态分析并制作曲轴柔性体文件;在ADAMS软件中建立曲轴连杆机构刚柔耦合模型,求解作用于机体的动态载荷;在ANSYS Workbench软件中进行机体瞬态动力学分析,从振动剧烈部位入手改进机体结构;对改进后的机体进行振动分析和柴油机振动实验,证明了结构改进的有效性。In order to reduce the vibration of the diesel engine,the structure of the diesel engine block was improved,and the vibration of the improved diesel engine block was analyzed.The HyperMesh software was used to generate the high quality finite element model of the diesel engine block and crankshaft,combining with ANSYS software to carry out the modal analysis of the diesel engine block and making the flexible body file of the crankshaft.The rigid flexible coupling model of the crankshaft connecting rod mechanism was established in ADAMS software to solve the dynamic load acting on the diesel engine block.In ANSYS Workbench software,the transient dynamic analysis of the diesel engine block was carried out,and the structure of the diesel engine block was improved from the violent vibration part.The vibration analysis of the improved diesel engine block and the vibration experiment of the diesel engine proved the effectiveness of the structural improvement.

关 键 词：柴油机机体 多体动力学 瞬态动力学 振动分析 

分 类 号：TK422[动力工程及工程热物理—动力机械及工程]