基于TPNR的整车路噪声学性能优化

Acoustic Performance Optimization of Vehicle Road Noise Based on TPNR

为研究声学包性能对整车路噪表现的影响,采用TPNR静态试验和道路动态试验,研究了声学包方案对某SUV乘用车中、高频路噪性能的提升效果,结果表明:(1)封堵A柱和前门槛的钣金孔洞、行李箱门槛增加吸声材料和C柱下护板空腔内增加阻隔材料都具有提高整车路噪隔声量的效果;(2)动态测试表明,提升方案对60 km/h匀速工况下,整车前、后排的中、高频路噪改善效果明显,而在80 km/h匀速工况下,仅对后排改善效果明显,对前排改善效果稍弱。

In order to study the influence of acoustic package performance on the vehicle road noise performance,TPNR static test and road dynamic test were used to study the improvement effect of acoustic package scheme on the medium and high frequency road noise performance of an SUV passenger vehicle.The results show that plugging the sheet metal holes of A-pillar and front doorsill,increasing the sound absorption material of luggage doorsill and increasing the barrier material in the cavity of C-pillar lower guard board have the effect of improving the road noise sound insulation of the whole vehicle.The dynamic test shows that the improvement effect of the lifting scheme on the middle and high frequency road noise in the front and rear row of the whole vehicle is obvious under the condition of 60 km/h constant speed.Under the condition of 80 km/h constant speed,the improvement effect is only obvious for the rear row,but slightly weak for the front row.