Administrator by China Associction for Science and Technology
Sponsored by China Society of Automotive Engineers
Published by AUTO FAN Magazine Co. Ltd.

Automotive Engineering ›› 2022, Vol. 44 ›› Issue (12): 1954-1970.doi: 10.19562/j.chinasae.qcgc.2022.12.017

Special Issue: 底盘&动力学&整车性能专题2022年

Previous Articles    

Research on Noise Source Locating for Car Door Rattle Based on Time Reversal Method

Weidong Zhao1(),Xinwei Xu1,Rui Song2,Mingliang Yang3,Chao Qi4   

  1. 1.School of Automobile and Traffic Engineering,Jiangsu University,Zhenjiang  212013
    2.China Automotive Technology & Research Center Co. ,Ltd. ,Tianjin  300300
    3.School of Mechanical Engineering,Southwest Jiaotong University,Chengdu  610031
    4.School of Mining Engineering,Anhui University of Science and Technology,Huainan  232001
  • Received:2022-05-24 Revised:2022-07-24 Online:2022-12-25 Published:2022-12-22
  • Contact: Weidong Zhao E-mail:zhaowd@ujs.edu.cn

Abstract:

For locating the noise sources of common car door rattle, a mathematical model is established first based on the Lamb wave propagation theory, Morlet wavelet transform and time reversal focusing positioning principle, and a method for locating the noise source of car door rattle is proposed. Then through thin plate impact simulation, the cause of the aliasing of the vibration signal wave packet is explored, and the principle of narrowband signal extraction is determined. Finally a noise source locating test for car door rattle is conducted, and the influencing rule of the issuing moment of abnormal noise signal on the positioning imaging is revealed, with a signal image judgment method for the moment put forward. The test results show that the maximum and average locating error of noise source of car door rattle is 3.16 cm and 2.01 cm respectively, verifying the feasibility and engineering application value of the rattle source locating method based on time reversal technique proposed.

Key words: abnormal noise, car door, time reversal method, Lamb wave, Morlet wavelet transform, wave packet aliasing