Open AccessSound Quality Prediction of Vehicle Door Closing Based on Experiment and Boundary Element Method
Author(s) -
Yunkai Gao,
Zhe Liu
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/825/1/012046
Subject(s) - closing (real estate) , sound pressure , sound quality , point (geometry) , test bench , acceleration , quality (philosophy) , acoustics , structural engineering , engineering , computer science , simulation , mechanical engineering , mathematics , philosophy , physics , geometry , epistemology , classical mechanics , political science , law
The sound quality of the vehicle door can only be improved after the testing vehicle has been manufactured. In this paper, a simulation model of the door system closing collision is established, and the vehicle test and the bench test are designed. In the vehicle test, according to the design characteristics of the door structure and the situation that the operating load cannot be obtained directly. The impact load on the door are simplified as the concentrated loads when the door is closed. The reference points are arranged near the location of the concentrated loads, and the number is twice of the concentrated loads. The acceleration response at the reference points are measured. In the bench test, the frequency response functions (FRFs) from the concentrated load points to the reference points are measured. Using the inverse matrix method, the value of the concentrated loads are obtained. A boundary element model is established and the concentrated load are applied to the model to collect sound pressure signals at the field point. The results show that the sound pressure values obtained by experiment and simulation are highly consistent. It shows that this method is feasible in predicting the sound quality.