Simulation on a Car Interior Aerodynamic Noise Control Based on Statistical Energy Analysis  

作　　者：CHEN Xin WANG Dengfeng MA Zhengdong 

机构地区：[1]State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China [2]Zhengjiang Geely Automobile Institute Co. Ltd., Hangzhou 311228, China [3]College of Engineering, University of Michigan, Ann Arbor MI48109, USA

出　　处：《Chinese Journal of Mechanical Engineering》2012年第5期1016-1021,共6页中国机械工程学报（英文版）

基　　金：supported by National Natural Science Foundation of China (Grant No. 51175214);Scientific and Technological Planning Project of China (Grant No. 2011BAG03B01-1);Based Research Operation Expenses Project of Jilin University, China (Grant No. 421032572415)

摘　　要：How to simulate interior aerodynamic noise accurately is an important question of a car interior noise reduction. The unsteady aerodynamic pressure on body surfaces is proved to be the key effect factor of car interior aerodynamic noise control in high frequency on high speed. In this paper, a detail statistical energy analysis （SEA） model is built. And the vibra-acoustic power inputs are loaded on the model for the valid result of car interior noise analysis. The model is the solid foundation for further optimization on car interior noise control. After the most sensitive subsystems for the power contribution to car interior noise are pointed by SEA comprehensive analysis, the sound pressure level of car interior aerodynamic noise can be reduced by improving their sound and damping characteristics. The further vehicle testing results show that it is available to improve the interior acoustic performance by using detailed SEA model, which comprised by more than 80 subsystems, with the unsteady aerodynamic pressure calculation on body surfaces and the materials improvement of sound/damping properties. It is able to acquire more than 2 dB reduction on the central frequency in the spectrum over 800 Hz. The proposed optimization method can be looked as a reference of car interior aerodynamic noise control by the detail SEA model integrated unsteady computational fluid dynamics （CFD） and sensitivity analysis of acoustic contribution.How to simulate interior aerodynamic noise accurately is an important question of a car interior noise reduction. The unsteady aerodynamic pressure on body surfaces is proved to be the key effect factor of car interior aerodynamic noise control in high frequency on high speed. In this paper, a detail statistical energy analysis （SEA） model is built. And the vibra-acoustic power inputs are loaded on the model for the valid result of car interior noise analysis. The model is the solid foundation for further optimization on car interior noise control. After the most sensitive subsystems for the power contribution to car interior noise are pointed by SEA comprehensive analysis, the sound pressure level of car interior aerodynamic noise can be reduced by improving their sound and damping characteristics. The further vehicle testing results show that it is available to improve the interior acoustic performance by using detailed SEA model, which comprised by more than 80 subsystems, with the unsteady aerodynamic pressure calculation on body surfaces and the materials improvement of sound/damping properties. It is able to acquire more than 2 dB reduction on the central frequency in the spectrum over 800 Hz. The proposed optimization method can be looked as a reference of car interior aerodynamic noise control by the detail SEA model integrated unsteady computational fluid dynamics （CFD） and sensitivity analysis of acoustic contribution.

关 键 词：CAR interior aerodynamic noise CONTROL computational fluid dynamics statistical energy analysis 

分 类 号：TB535[理学—物理] U463.85[理学—声学]