Noise Source Identification of Single Cylinder Gasoline Engine with Combination of Several Methods
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摘要: 对152QMI单缸汽油机进行噪声及振动以及曲轴转角等信号的采集,在LMS Test.Lab软件中利用频谱分析和小波变换计算得出了该单缸汽油机噪声能量的主要分布范围,并以此作为噪声源识别的对象,利用阶次分析和小波变换筛选出该机噪声信号中频率不随转速变化的共振因素,随后在角度域内对信号进行小波变换,结合发动机配气机构等部件的运动特征研究识别相对于各频率带的发动机噪声源。研究结果表明,该发动机主要噪声频率带为800 Hz以下、2 000 Hz和4 000 Hz~5 000 Hz,各频率带噪声源分别为进排气噪声、缸盖共振和顶杆对摇臂的冲击以及气门落座冲击。Abstract: Noise signals, vibration signals and crank angle signal of 152QMI single cylinder engine were collected. The main distribution ranges of the single cylinder engine noise energy were calculated through spectrum analysis and wavelet transforms, using a module of the software LMS Test. Lab. The engine noise signals whose frequency does not change with speed resonance were screened out with order analysis and wavelet analysis. Then the signals were processed with wavelet analysis in angle domain. Considering the motion characteristics of valve-train, the engine noise sources of each frequency band were identified. Research results show that the bands of 0~800 Hz, 2 000 Hz, 4 000 Hz~5 000 Hz were the main noise frequency bands of this gasoline engine; the air inflow and exhaust noise, cylinder head cover resonance and the impact of the rocker arm and valve seat were identified to be the physical cause of each frequency band.
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[1] 何渝生.汽车噪声控制[M].北京:机械工业出版社,1999 He Y S. Noise control of automobile[M]. Beijing: China Machine Press, 1999 (in Chinese) [2] 马大猷.噪声控制学[M].北京:科学出版社,1987 Ma D Y. Noise control science[M]. Beijing: Science Press, 1987 (in Chinese) [3] Kazuhiro T. Sound source identification technique for audible sound[J]. The Journal of the Acoustical Society of Japan, 2005,61(11):659-664 [4] 胡伊贤,李舜酩,张袁元,等.东车辆噪声源识别方法综述[J].噪声与振动控制,2012,32(5):11-15,20 Hu Y X, Li S M, Zhang Y Y, et al. Reviews of vehicle noise source identification methods[J]. Noise and Vibration Control, 2012,32(5):11-15,20 (in Chinese) [5] 金岩,常志权.频谱分析技术在车辆NVH故障诊断中的应用[J].噪声与振动控制,2010(1):110-113 Jin Y, Chang Z Q. Application of spectrum analysis in vehicle's abnormal NVH phenomenon diagnosis[J]. Noise and Vibration Control, 2010(1):110-113 (in Chinese) [6] 徐红梅,郝志勇,郭磊.阶次分析在发动机进气噪声研究中的应用[J].小型内燃机与摩托车,2008,37(1):83-86 Xu H M, Hao Z Y, Guo L. Application of order analysis in intake noise research of engine[J]. Small Internal Combustion Engine and Motorcycle, 2008,37(1):83-86 (in Chinese) [7] 姚志远, 曾发林, 宫镇. 小波变换在车辆噪声源识别中的应用[J]. 汽车工程, 2002,24(4):302-305 Yao Z Y, Zeng F L, Gong Z. Application of wavelet in identifying the noise sources of automobile[J]. Automotive Engineering, 2002,24(4):302-305 (in Chinese) [8] 杨金才,郝志勇.用A计权连续小波变换识别内燃机噪声源[J].浙江大学学报(工学版),2006,40(7):1174-1177 Yang J C, Hao Z Y. Using A-weighting CWT to identify internal combustion engine sound source[J]. Journal of Zhejiang University (Engineering Science), 2006,40(7):1174-1177 (in Chinese) [9] Maynard J D, Williams E G, Lee Y. Near field acoustic holography: I. Theory of generalized holography and the development of NAH[J]. Journal of the Acoustical Society of America, 1985,78(4):1395-1413 [10] Thomas J H, Grulier V, Paillasseur S, et al. Real-time near-field acoustic holography for continuously visualizing nonstationary acoustic fields[J]. The Journal of the Acoustical Society of America, 2010,128(6):3554-3567 [11] 孙嵩松,李志远,陆益民,等.基于声强技术的发动机噪声源识别研究[J].汽车工程,2014,36(1):48-50,106 Sun S S, Li Z Y, Lu Y M, et al. A study on the based noise source identification of engine on sound intensity technique[J]. Automotive Engineering, 2014,36(1):48-50,106 (in Chinese) [12] 褚志刚,杨洋,蒋忠翰.摩托车怠速异响噪声源的识别及控制[J].噪声与振动控制,2011,31(4):89-92 Chu Z G, Yang Y, Jiang Z H. Abnormal noise source identification and control of motorcycle under idle condition[J]. Noise and Vibration Control, 2011,31(4):89-92 (in Chinese) [13] 彭玉华.小波变换与工程应用[M].北京:科学出版社,1999 Peng Y H. Wavelet transform and engineering application[M]. Beijing: Science Press, 1999 (in Chinese) [14] 敦立明.柴油机表面辐射噪声源小波识别及心理声学参数评价研究[D].天津:天津大学,2011 Dun L M. Research on noise source identification of diesel engine based on wavelet analysis and psychoacoustical evaluation[D]. Tianjin: Tianjin University, 2011 (in Chinese) [15] 景亚兵,刘焕领,白伟,等.基于角度域的汽油发电机组噪声分析[J].内燃机与配件,2011(6):25-27 Jing Y B, Liu H L, Bai W, et al. Application of variable valve timing mechanism in automobile motor and its maintenance[J]. Internal Combustion Engine & Parts, 2011(6):25-27 (in Chinese)
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