›› 2011, Vol. 31 ›› Issue (4): 89-92.DOI: 10.3969/j.issn.1006-1355-2011.04.021

• 3.运载工具振动与噪声 • Previous Articles     Next Articles

Abnormal Noise Source Identification and Control of Motorcycle under Idle Condition

CHU Zhi-gang 1,YANG Yang 1，2，JIANG Zhong-han 1   

  1. ( 1. College of Mechanical Engineering, Chongqing University， Chongqing 400030， China 2. Automotive College of Tongji University， Shanghai 201804， China ）)
  • Received:2010-11-01 Revised:2011-01-17 Online:2011-08-18 Published:2011-08-18

摩托车怠速异响噪声源的识别及控制

褚志刚1,杨 洋1，2,蒋忠翰1   

  1. （ 1.重庆大学 机械工程学院， 重庆 400030； 2.同济大学 汽车学院， 重庆 400030 ）
  • 通讯作者: 褚志刚

Abstract: Utilizing sound intensity method, source separation method and selective sound intensity method comprehensively, the abnormal noise source of motorcycle under idle condition was identified. The production mechanism and transmission of the abnormal noise was analyzed. The results show that the frequency ranges from 891Hz to 2239Hz and the radiation noise of exhaust muffler heat shield is the dominate source and the impact to the muffler internal partitions by exhaust airflow is the root reason. The abnormal noise can be eliminated effectively by strengthening the connection stiffness of the muffler internal partitions.

Key words: acoustics, abnormal noise, sound intensity method, selective sound intensity method, noise source identification, noise control

摘要： 综合运用声强法、消去法和选择性声强法进行摩托车怠速异响噪声源识别试验，分析异响的产生机理及传播途径，结果表明：异响的频率范围为891～2 239 Hz，排气消声器隔热板辐射噪声是主要噪声源，排气气流冲击消声器内部隔板是其根本原因。增大消声器内部隔板与壳体连接刚度能够有效消除怠速异响。

关键词: 声学, 异响, 声强法, 选择性声强法, 噪声源识别, 噪声控制

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