车内噪声品质的时域传递路径分析  

Time-domain Transmission Path Analysis of Vehicle Interior Noise Quality

作　　者：鲁媛 金鹏 王玉雷 廖毅 Lu Yuan;Jin Peng;Wang Yulei;Liao Yi(SAIC-GM-Wuling Automobile Co.,Ltd.,Liuzhou 545007;Spectris Instrumentation&Systems Shanghai Ltd.,Shanghai 200233)

机构地区：[1]上汽通用五菱汽车股份有限公司,柳州545007 [2]上海思百吉仪器系统有限公司,上海200233

出　　处：《汽车工程》2019年第12期1435-1441,共7页Automotive Engineering

基　　金：广西八桂学者专项基金(2017AA10101)资助

摘　　要：传统的频域传递路径分析方法容易获取振动信号的频谱特性,但难以与车内主观感受相结合,导致分析效率低和误判的缺陷。为了解决此问题,研究了基于时域传递路径分析的方法与车内噪声品质的相关性。利用声品质主观评价和客观数据的回归方程建立了声品质评审模型,设定了目标参数,再利用时域传递路径分析的方法得到了可靠的传递路径的分析模型。最终通过对动力总成噪声的时域特性进行分析与计算,得到了不同激励源的车内贡献量,对传递路径进行优化后,降低了5 dB(A)的发动机2阶噪声声压级,提高了车内声品质。The traditional frequency-domain transfer path analysis method is easy to obtain the spectrum characteristics of vibration signals,but it is difficult to combine with the subjective feelings in the vehicle,which leads to low efficiency of analysis and the shortcomings of misjudgement.In order to solve this problem,the correlation between the interior sound quality and the method based on time-domain transfer path analysis is studied.Based on the regression equation of subjective evaluation and objective data of sound quality,the evaluation model of sound quality is established,and the target parameters are set.Then the reliable analysis model of transmission path is obtained by using the method of time-domain transmission path analysis.Finally,through analyzing and calculating the time-domain characteristics of powertrain noise,the in-vehicle contribution of different excitation sources is obtained,and the transmission path is optimized.As a result,the second-order noise pressure level of the engine is reduced by 5 dB(A),and the interior sound quality of the vehicle is improved.

关 键 词：传递路径分析 声品质目标 声品质模型 贡献量 

分 类 号：U46[机械工程—车辆工程]