基于模态分析的发动机齿轮室盖优化设计  

Optimized Design of Gearbox Cover of Diesel Engine Based on Modal Analysis

作　　者：胡志胜[1] 李波[1] 陈玮[1] 

机构地区：[1]安徽江淮汽车股份有限公司技术中心

出　　处：《汽车工程师》2011年第7期59-61,共3页Automotive Engineer

摘　　要：某柴油发动机齿轮室盖在试验中振动较大,为解决这一问题,文章采用声学振动测试与CAE模态分析相结合的方法,对齿轮室盖进行优化设计,并进行试验验证。结果证明通过在齿轮室盖薄弱位置处添加加强筋,可以有效提高其固有频率,避开发动机在3600r/min转速下的主要贡献频率,改善齿轮室盖的振动情况。CAE模态分析方法能够有效识别结构件的薄弱区域,通过加强局部刚度,改善振动性能。In order to solve the greater vibration of gearbox cover of a diesel engine in the experiment,the acoustics vibration test and CAE modal analysis method were combined to optimize design of gearbox cover of a diesel engine and test validation was proceeded.The result has proved that the ribs on the weakness region would increase the frequency,avoid the main contribute frequency at 3 600 r/min and improve the vibration performance of gearbox cover.CAE modal analysis method can distinguish the weakness regions from structure effectively,vibration performance can be improved by increasing the local rigidity.

关 键 词：发动机齿轮室盖 机械振动测试 CAE 模态分析 

分 类 号：TK423[动力工程及工程热物理—动力机械及工程]