Finite element model updating of low frequency acoustic structure coupling based on vehicle test

被引：2
|
作者：
Lin, Zhaoli [1 ]
Peng, Yong [2 ]
Chen, Zhijun [1 ]
Gan, Souwu [1 ]
机构：
[1] Chongqing Coll Elect Engn, Chongqing 400054, Peoples R China
[2] Chongqing Changan Automobile Co Ltd, Chongqing 400102, Peoples R China
来源：
2ND INTERNATIONAL CONFERENCE ON FRONTIERS OF MATERIALS SYNTHESIS AND PROCESSING | 2019年 / 493卷
关键词：
low frequency noise; acoustic structure coupling; finite element model; damping modification; vehicle test;
D O I：
10.1088/1757-899X/493/1/012159
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The finite element model of a car is established, and the acoustic-structure coupling finite element model of the car is modified considering the influence of structural damping and acoustic impedance of interior material. Through the road test of a real vehicle, the excitation signal and the corresponding interior noise signal under the condition of 50 km/h uniform speed are obtained. Taking the measured excitation signal as the input of the finite element model, the frequency response analysis of the low frequency noise in the frequency range of 20-200 Hz is carried out. The results show that the modified acoustic-structure coupling finite element model can be used to predict the low-frequency noise in the vehicle. The research in this paper can provide reference for vehicle NVH forward design, vehicle vibration and noise prediction and improvement.
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页数：6
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