车内低频振动噪声的虚拟传递路径分析*

doi:10.19562/j.chinasae.qcgc.2020.04.016

Abstract

Abstract: Transfer path analysis (TPA) is an accurate and effective method to diagnose vehicle vibration and noise of automobile. The test TPA is time-consuming and labor-intensive and requires a prototype car, in order to diagnose the vehicle vibration and noise problems in the initial stage of vehicle development, the virtual TPA method is studied. Firstly, a vehicle structure-acoustic coupling finite element model with chassis is developed and the frequency response method is used to predict the acoustic vibration response in the vehicle. It is found that there exist peak values at 38 Hz of the sound pressure of the driver's right ear and at 59 Hz of the vibration of the guide rail of the driver's seat. The virtual TPA model based on the finite element model is developed. The results of acoustic vibration reconstructed by the model are consistent with that of frequency response method, which verifies the correctness of the model. The two peak values are diagnosed with virtual TPA method and the dominant paths are optimized according to the analysis results. The optimization results show that the sound pressure of driver's right ear at 38 Hz is reduced by 2 dB, and the seat vibration at 59 Hz is improved obviously

Key words: noise and vibration, transfer path analysis, finite element

Tang Zhonghua, Zhang Zhifei, Chen Zhao, Pu Hongjie, Li Yun, Xu Zhongming. Virtual Transfer Path Analysis of Vehicle InteriorNoise and Vibration in Low Frequency[J].Automotive Engineering, 2020, 42(4): 531-536.

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Virtual Transfer Path Analysis of Vehicle InteriorNoise and Vibration in Low Frequency

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