nvh性能測試技術(shù)流程研究-wenkub
2023-04-08 05:01:28 本頁面
【正文】 analysis ,constructing the basic analysis model, and bining with the transfer path analysis methods and the international advanced data test system, the writer makes NVH testing and analysis on each path where a NVH problem could be produced, and then, get a preliminary diagnosis by using exclusion method. Finally, on the base of analyzing and summarizing the engineering problems, the general technical process of automobile NVH performance testing and analysis had been established in this paper, that will give some references on solving related automobile NVH problems in future. and the significance of research about the testing technical process of a vehicle NVH performance is put forward. Key words： NVH；Transfer Path Analysis；Technical Process0 引言隨著人們對汽車乘坐舒適性期望越來越高以及世界各國有關(guān)環(huán)境保護(hù)的法規(guī)越來越嚴(yán)格，當(dāng)前汽車NVH(Noise, Vibration amp。汽車NVH性能測試技術(shù)流程研究﹡楊明亮 丁渭平（西南交通大學(xué)機(jī)械工程學(xué)院汽車工程研究所 成都 610031）The research about the testing technical process of a vehicle NVH performance Yang Mingliang Ding Weiping(The Research Institute of Automobile Engineering, College of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China)【摘要】汽車NVH性能是評價整車性能重要指標(biāo)之一。 Harshness）研究也愈發(fā)受到相關(guān)科研機(jī)構(gòu)和汽車生產(chǎn)廠家的重視[14]。1 NVH性能摸底測試某國產(chǎn)乘用車在低轉(zhuǎn)速，尤其是在1500r/min左右時，車內(nèi)有較大的噪聲，振動強(qiáng)烈，產(chǎn)生了共振現(xiàn)象，影響了整車的NVH性能。行車狀態(tài)：半油門加速（POT）、全油門加速（WOT）。噪聲（dB） 頻率(Hz)（a）車內(nèi)噪聲的頻譜分析振動加速度(g)頻率(Hz)（b）車內(nèi)振動的頻譜分析圖12 車內(nèi)聲振頻譜分析從圖12（a）可以看出，在1500r/min左右，不論是駕駛員側(cè)、副駕駛側(cè)還是在后排座椅處， 該車在50Hz左右的幅值最大。2 傳遞路徑分析 傳
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