基于客观心理声学参数的重型商用车车内异响噪声分析  

Abnormal noise analysis for commercial vehicle cab based on psychoacoustics

作　　者：高印寒[1] 张澧桐[2] 梁杰[1] 王智博[1] 姜文君 

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,长春130022 [2]吉林大学仪器科学与电气工程学院,长春130061 [3]中国第一汽车股份有限公司技术中心,长春130011

出　　处：《吉林大学学报（工学版）》2016年第1期43-49,共7页Journal of Jilin University:Engineering and Technology Edition

基　　金：吉林省科技发展计划项目(20126007;20130206031GX)

摘　　要：针对某款重型商用车内的＂异响＂,基于道路试验和仿真计算,结合声品质主观评价和频谱分析,引入响度、尖锐度和粗糙度3个声品质客观心理声学参数,对驾驶室声振特性和驾驶室内的噪声分布进行分析研究,识别车内＂异响＂产生机理并提出相应的控制策略。研究结果表明：70km/h时驾驶室内噪声异常。影响车内声品质的频率主要集中在22-36Hz和56-90Hz。通过激励与声振传递特性分析,其原因分别是25Hz附近较高的结构激励和58Hz附近的驾驶室结构与声腔的耦合共振。驾驶室内低频噪声声压分布呈现横向底部两侧大、中间小的状态;0-1Bark的响度分布表现为横向底部两侧大,中间无衰减的噪声异常分布状态。In this paper three psychoacoustic parameters,loudness,sharpness and roughness,are introduced to evaluate the abnormal noise for commercial vehicle cab.The noise transfer and acoustics distribution characters of the vehicle are investigated and analyzed by means of field measurements and virtual simulation based on subjective evaluation of sound quality and frequency characteristics analysis.Identification of the abnormal cab noise is made to find a control method.The results show that the abnormal noise for commercial vehicle cab occurs at the vehicle speed of 70km/h.the sound quality of the vehicle cab is mainly affected at the frequency ranges of 22-36 Hz and 56-90 Hz.The main reasons are the higher structure excitation near frequency 25 Hz,and the resonance coupling of the cab structure and cavity at 58 Hz by the exterior vibration and noise transfer characters,respectively.At low frequency,the interior sound pressure distribution is higher in the underside and lower in the middle at the cross-section.The loudness distribution is also higher in the underside,but not lower in the middle at the cross-section at 0-1Bark.

关 键 词：汽车工程 车内异响 声品质评价 客观心理声学参数 声-固耦合 噪声分布 

分 类 号：TB53[理学—物理]