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| Acoustic-vibration optimization based on panel acoustic contribution analysis of vehicle body |
| School of Automotive Studies, Tongji University, Shanghai 201804, China |
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Abstract The vehicle body panels were optimized to reduce incar structural noise at low frequency. By the method of substructure mode synthesis, the structural dynamic model was set up with the boundary condition of operational vibration response for acoustic boundary element model (BEM). According to acoustic transfer vector (ATV) results, the driverrightear position was selected as acoustic response point to analyze acoustic contribution of vehicle body panels.Based on the panel contribution analysis, the key panels to incar noise were located to restrain the vibration of these crucial panels. At idle speed,the experimental validation indicates that the acoustic level of incar noise is markedly improved with the main peaks decrease of 5.70 dB and incar noise overall level decrease of 3.89 dB. Incar structural noise can be controlled by the methed of panel contribution analysis.
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2012, Vol. 33 
