中型载货汽车怠速异响噪声源识别

振动与冲击 ›› 2009, Vol. 28 ›› Issue (3) : 171-173.

论文

中型载货汽车怠速异响噪声源识别

褚志刚1,邓兆样1,王亮1,王卫东2

作者信息 +

Idle abnormal noise source identification for a middle-duty truck

CHU Zhi-gang1, DENG Zhao-xiang1, WANG Liang1, WANGWei-dong2

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摘要

针对某载货汽车怠速时出现的异常噪声,综合利用频谱分析技术、声学互动滤波技术、选择性声强法表面声源识别技术、基于消去法的物理声源识别技术,分析确定了噪声来源,并揭示了其传播及辐射机理,结果表明:怠速异响的频率范围为274 Hz~330 Hz;进气系统的进气口和空气滤清器壳体表面是其表面噪声辐射源,而空压机进气噪声是其根本来源,控制空压机进气噪声能够有效消除怠速异响。

Abstract

Aiming at an idle abnormal noise of a middle-duty truck, several approaches, such as, spectral analysismethod, acoustics interaction filter, selective sound intersitymethod for surface source identification and physical separation ofnoise source base on expunctionmethodwere used to identifynoise source and rereal its spread and radiationmechanism. Analysis showed that the frequency range of the idle abnormal noise is from 274Hz to 330Hz; the air intake and the air cleaner shell of the intake system are the surface noise sources; while the intake noise of the air compressor is the essentialnoise source; the edle abnormalnoise can be eliminated bymodifying the intake system of the air compressor.

Key words

idel abnormalnoise / noise source identification(NSI) / acoustics interaction filter / selective sound intensity / intake noise

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褚志刚;邓兆样;王亮;王卫东. 中型载货汽车怠速异响噪声源识别[J]. 振动与冲击, 2009, 28(3): 171-173

CHU Zhi-gang;DENG Zhao-xiang;WANG Liang;WANGWei-dong. Idle abnormal noise source identification for a middle-duty truck[J]. Journal of Vibration and Shock, 2009, 28(3): 171-173