汽车起重机车外噪声控制研究-重庆交通大学.PDF

Vo l. 32 No.6 重庆交通大学学报(自然科学版) 第 32 卷第 6 期 JOURNAL OF CHONGQING JIAOTONG UNIVERSJTY (NATURAL SCIENCE) Dec.2013 2013 全 12 月 doi: 10. 3969/j. issn. 1674-0696.2013.06.38 汽车起重机车外噪声控制研究 陈旭，左言言 (江苏大学振动噪声研究所，江苏镇江 212013 ) 摘要:研究了发动机噪声、传动系噪声、排气系统噪声和振动辐射噪声等噪声源对车外总噪声的影响p 通过模拟道 路噪声测试法、近场测量法和点声源的声辐射模型对车身各噪声源对车外噪声的贡献量进行排序，识别出主要噪声 源。进而提出相应降噪措施对发动机进行了隔声、吸声处理，取得了良好的效果。 关键词:汽车起重机;车外加速噪声;噪声源;点声源 中图分类号:TH213.6 文献标志码:A 文章编号:1674-0696(2013)06-1270-05 Control of Exterior Noise of Truck Crane Chen Xu , Zuo Yanyan (Research Institute of Vibration Noise , Jiangsu University , Zhenjiang 212013 , Jiangsu , China) Abstract: The influence of main noise sources , including engine noise , drive system noise , exhausting system noise and vi- bration radiation noise , on the exterior noise of automobile crane was studied. The noise sources were sorted and identifìed according to their different contribution to the exterior noise , using simulation of road noise test , near fìeld measurement and the sound radiation model of point source. And then , corresponding noise reduction measurements were proposed to caπγ out the sound insulation and absorption on the engine , which achieved good results. Key words: truck crane; exterior vehicle acceleration noise; noise source; point source l 日后生产的 M 和 N 类汽车且额定功率大于 150 。引言 kW 的车外加速噪声不大于84 dB(A) 0 随着汽车行业的迅速发展，人们对其振动噪声 笔者所研究对象为四轴汽车起重机，其额定功 控制的要求越来越高。为了降低车辆噪声对环境的 率为 276 kW，自重 44 t ，