摘要
某款2.0TGDI+6AMT汽油机动力总成进行台架试验过程中在不同工况下产生异常振动。针对异常振动问题,通过NVH试验对故障现象进行数据分析,结果表明:动力总成在5/6档发生87 Hz的弹性体模态共振;在2档出现了10 Hz的刚体模态共振。结合测试分析结果,通过改进传动轴连接方式提高动力总成弹性体模态,同时调整后悬置刚度改变刚体模态,从而解决该动力总成异常振动问题。最后,试验测试也证明该分析数据的正确性和优化方案的可行性。此实验分析方法不仅缩短了动力总成的开发周期,而且对解决同类工程问题也具有很好的参考价值。
The abnormal vibration was measured in a bench test for the power assembly of a gasoline engine (2.0TGDI+6AMT) in different working conditions. The fault phenomena were analyzed by NVH testing. The results show that the 87Hz elastomer modal resonance appears in the 5/6 gear and the 10 Hz rigid-body modal resonance appears in the 2nd gears of the power assembly. Through improving the connection of the transmission shaft, the elastomer modals of the power assembly were raised;and through adjusting the rear suspension stiffness, the rigid-body modes were changed. Then, the elastomer modal resonance and the rigid-body modal resonance disappeared. And the abnormal vibration problem of the power assembly was solved. Finally, the correctness of the analysis and the feasibility of the optimal scheme were verified by the measurement test. The experiment analysis process can shorten the development period of the power assembly, and give a reference for similar engineering applications.
出处
《噪声与振动控制》
CSCD
2015年第6期211-214,共4页
Noise and Vibration Control
关键词
振动与波
动力总成
异常振动
刚体模态
NVH
vibration and wave
power assembly
abnormal vibration
rigid-body modes
NVH
