汽车发动机飞轮壳试验分析与改进  

Test Analysis and Improvement of Automobile Engine Flywheel Shell

作　　者：白玉[1] 孟浩东[1] 

机构地区：[1]常州工学院机电工程学院,江苏常州213002

出　　处：《机械设计与制造》2015年第10期192-195,共4页Machinery Design & Manufacture

基　　金：江苏省"六大人才高峰"项目(2012-ZBZZ-011)

摘　　要：针对某型车常用转速下动力总成的共振问题,在发动机试验台上对动力总成结构进行了模态试验,分析其固有特性,找出发动机飞轮壳弯曲刚度低是导致动力总成共振的原因。在ANSYS软件中建立一种实车条件下的动力总成有限元仿真模型,计算其约束模态,并验证所建仿真模型合理性。改进发动机飞轮壳结构提高动力总成弯曲固有频率,以避开发动机常用转速激励频率区间。有限元仿真计算和发动机台架试验验证了改进结构的有效性。该模态试验与仿真分析方法对解决同类工程问题具有参考指导和应用价值。For resonance of the car＇s powertrain in working rotation speed conditions,modal test of structure of powertrain was carried out in the engine test bench; its inherent properties were analyzed,and the cause of resonance of powertrain was found out that bending stiffness of engine flywheel shell was low. A kind of finite element simulation model of the powertrain in whole vehicle condition was established in ANSYS software,its constraint mode was calculated,and the rationality of finite element simulation model was validated. In order to avoid excitation frequency range of working rotation speed of engine,the bending inherent frequency of powertrain was improved through improving structure of the engine flywheel shell. The effectiveness of the improved structure was validated by simulation calculation of finite element and bench test of engine. The modal testing and simulation analysis methods mentioned which solve the similar engineering problem are advisable to the reference guidance and engineering application.

关 键 词：汽车 飞轮壳 模态试验 仿真分析 固有特性 改进 

分 类 号：TH16[机械工程—机械制造及自动化] U464.1[机械工程—车辆工程]