2009•Journal of Jilin UniversityRequires access
Optimization of car interior low frequency noise based on sensitivity analysis
Yumei Hu
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Abstract
A finite element model for the car body including doors and windows,a finite element model for the car interior acoustic field,and a coupled structure-acoustic model were built and the car interior coupled acoustic field was predicted.A sensitivity analysis model was built for the car interior acoustic field,and the acoustic pressure sensctivities of the admittance of the acoustic field boundary and the board vibration velocity were studied.According to the sensitivity analysis results,the ribs and the thickness of the key boards were optimized,leading to reduction of the main peak values of the car interior acoustic pressure level by 2～3 dB(A).