噪声与振动控制2016，Vol.36Issue(2)：84-87,4.DOI:10.3969/j.issn.1006-1335.2016.02.018
汽车顶棚约束模态与工作模态分析与比较
Analysis and Comparison of Constraint Modal and Operation Modal of a Car Roof
周鋐 1曹阳光 2刘浩 1李冰杰2
作者信息
- 1. 同济大学 新能源汽车工程中心，上海 201804
- 2. 同济大学 汽车学院，上海 201804
- 折叠
摘要
Abstract
The constraint modal and operation modal of a car roof were obtained by testing and analysis. In the constraint modal test the car was impacted by a vibration exciter while in the operation modal test it was impacted by a hub in an anechoic chamber. Comparing the results with the auto power spectrum of the noise at driver’s right ear (driver’s noise), it was found that the noise frequency resulted from the operation modal analysis was closer to the noise peak frequency than that from the constraint modal analysis. By the comparison of the auto power spectrum of the driver’s noise with the average of auto power spectrum of the vibration acceleration at all the measurement points, the roof vibration was found to be the main cause of the driver’s noise in 100 Hz to 400 Hz frequency range. Finally, by adjusting the roof structure, the driver’s noise was restrained.关键词
振动与波/汽车顶棚/汽车试验/约束模态/工作模态Key words
vibration and wave/car roof/automobile test/constraint modal/operation modal分类
交通工程引用本文复制引用
周鋐,曹阳光,刘浩,李冰杰..汽车顶棚约束模态与工作模态分析与比较[J].噪声与振动控制,2016,36(2):84-87,4.
