某乘用車50kph勻速行駛時嘯叫成因分析與改進
[Abstract]:As one of the main noise sources of automobile, the control of its noise level directly affects the performance of the whole vehicle NVH. Therefore, in the development of transmission, in addition to ensuring its good working performance, Controlling its vibration and noise has become one of the important indexes in the research and development process. In this paper, aiming at the problem of whistling noise in a passenger car, the causes of roaring noise and possible improvement measures are analyzed and studied by means of experimental test and theoretical analysis. The research work has important engineering practical value for improving the design of the passenger car and improving its ride comfort. After a passenger car carrying a seven-speed double clutch transmission went on the market, it was found that when the car was driving at a uniform speed of 50km/h, there was an obvious whistling noise problem in the car. In order to solve the problem of whistling noise under this working condition, the noise and vibration test scheme is studied and worked out, and the noise and vibration level of the whole vehicle are tested. Then, the vibration test results of the transmission are analyzed by using the spectrum analysis theory, and the roaring noise frequency is confirmed after filtering and playback of the driver's right ear noise, and the collected noise and vibration signals are followed by order tracking. The vibration source of roaring abnormal noise is confirmed. Finally, through the comprehensive analysis of all possible transmission paths, the relationship between the main transmission path of whistling noise in the vehicle and the bending vibration of the driving half-shaft is obtained. In order to improve the whistling noise under this working condition, the method and theory of improving roaring noise are studied, and the actual situation of the vehicle has been put on the market. The scheme of optimizing the roaring noise in the vehicle from the transmission path is worked out: the dynamic vibration absorber is used to absorb the vibration energy of the driving half-shaft, so as to improve the whistling noise in the vehicle. This method has the advantages of simple structure, convenient installation and low cost. Through the test and comparison of the whole vehicle and the subjective evaluation conclusion, the roaring noise in the vehicle is improved obviously after assembling the dynamic vibration absorber on the driving half shaft. Based on the mechanism of whistling noise, this paper studies and summarizes a set of engineering methods to analyze and detect the whistling noise of transmission and improve it, so as to reduce the roaring noise of a passenger car when the 50km/h is running at a uniform speed. The research work provides an engineering application value method for improving the roar noise and ride comfort of formed passenger cars.
【學位授予單位】:廣東工業(yè)大學
【學位級別】:碩士
【學位授予年份】:2016
【分類號】:U463.212
【相似文獻】
相關(guān)期刊論文 前10條
1 哈廣喜;;嘯叫聲從何而來[J];汽車維護與修理;1999年02期
2 匡軍;;抑制音響自激嘯叫的方法[J];電子制作;2000年09期
3 蘭江華;;空調(diào)異常嘯叫聲聲源識別與分析[J];家電科技;2010年05期
4 蘭江華;;某空調(diào)異常嘯叫聲的聲源定位與消除及其頻譜特征研究[J];應用聲學;2010年04期
5 吳風友,張亞利;發(fā)電機運行溫升偏高和嘯叫聲原因分析與處理[J];水力發(fā)電;2000年04期
6 刁成洋;;康佳9000雙卡收錄機錄制本機收音節(jié)目時出現(xiàn)嘯叫聲[J];家電檢修技術(shù);1995年06期
7 何楓,郝鵬飛,張錫文;超音速射流嘯叫模式切換不穩(wěn)定性[J];聲學學報;2003年02期
8 王林濤;金永星;梁鵬飛;曾佳;劉佳偉;郭曉寧;;某型發(fā)動機嘯叫噪聲降噪技術(shù)研究[J];柴油機;2011年06期
9 于麗萍;;收錄機速修經(jīng)驗七則[J];家電檢修技術(shù);1999年06期
10 張軍華;吳向榮;吳玉泉;;茅崗電站發(fā)電機嘯叫聲的分析與處理[J];小水電;2013年06期
相關(guān)會議論文 前6條
1 肖龍帥;楊軍;;基于最小二乘均方誤差的嘯叫檢測算法[A];中國聲學學會第九屆青年學術(shù)會議論文集[C];2011年
2 王博;封昌玉;岳渠德;張艷;;高架輕軌嘯叫聲聲源分析[A];2012全國環(huán)境聲學學術(shù)會議論文集[C];2012年
3 厲劍;鄭成詩;李曉東;;基于幅度譜長時包絡(luò)跟蹤的嘯叫頻點檢測[A];中國聲學學會第十屆青年學術(shù)會議論文集[C];2013年
4 魏增來;安鵬飛;;淺談會議擴聲系統(tǒng)中的嘯叫抑制[A];2006年聲頻工程學術(shù)交流會論文集[C];2006年
5 陳瓊;秦浩明;;某型碳剎車盤組件剎車嘯叫識別研究[A];探索 創(chuàng)新 交流——第五屆中國航空學會青年科技論壇文集(第5集)[C];2012年
6 克依木;;6410型火焰光度計故障一例[A];新疆醫(yī)學工程學會第四屆學術(shù)年會論文匯編[C];2002年
相關(guān)重要報紙文章 前6條
1 河南 王賀榮;消除音響嘯叫[N];電子報;2005年
2 天津 王竹青;一樣的“嘯叫”,不一樣的處理[N];電腦報;2002年
3 安徽 孫國富;談談抑制話筒自激嘯叫的方法[N];電子報;2002年
4 姜元學;如何消除音箱嘯叫聲[N];光明日報;2002年
5 丁小梅;如何排除家庭音響的環(huán)境干擾和系統(tǒng)嘯叫[N];電子報;2008年
6 江蘇 爾東;先驅(qū)T601收音頭故障排除一例[N];電子報;2007年
相關(guān)碩士學位論文 前10條
1 陳丹艷;自適應嘯叫抑制算法的研究與DSP實現(xiàn)[D];電子科技大學;2014年
2 陳武文;某乘用車50kph勻速行駛時嘯叫成因分析與改進[D];廣東工業(yè)大學;2016年
3 陳康;盤式制動嘯叫的實驗研究與仿真分析[D];哈爾濱工業(yè)大學;2014年
4 謝炯毅;公共廣播中自適應嘯叫消除算法的研究[D];華南理工大學;2013年
5 周璐;影響自適應反饋抵消嘯叫抑制算法性能的聲學因素分析[D];南京大學;2012年
6 顧健華;機械變速器嘯叫聲成因分析及降噪研究[D];上海交通大學;2013年
7 江會仙;汽車手動變速箱嘯叫的原因分析與改進[D];南京航空航天大學;2014年
8 郝志國;低頻大功率超聲波清洗過程中嘯叫現(xiàn)象的研究[D];中國地質(zhì)大學(北京);2006年
9 袁高爽茜;基于MATLAB的自適應嘯叫抑制算法與評價標準的研究[D];電子科技大學;2013年
10 黃子騰;基于小波分析的聲頻系統(tǒng)聲反饋探測與抑制技術(shù)研究[D];電子科技大學;2012年
,本文編號:2484393
本文鏈接:http://sikaile.net/kejilunwen/qiche/2484393.html