摘要
用声强扫描法对国产某轻型载货汽车车外噪声源进行了识别,确定了其车外主要噪声源。开发了材料声学特性测量系统,并对多种车用吸声、隔声材料进行了测试与分析。根据被试轻型载货汽车车外主要噪声源的特性合理地选择吸声、隔声材料和噪声控制方案,对其进行了降噪处理。通过对降噪前、后该车车外噪声进行测试分析表明,采取降噪措施后,被试车辆车外动态加速噪声由84dB(A)下降到78dB(A),能够满足国家标准GB1495—2002对该类车辆车外动态加速噪声限值的要求。
In order to diagnose the exterior noise of the light-duty truck made by a domestic automobile manufacturer,the main exterior noise sources of the light-duty truck are identified with the method of sound intensity measurement in this paper.A material acoustic performance measurement system is developed,and the acoustic performances of many sound absorption and insulation materials are measured and analyzed with this system.The exterior noise of the light-duty truck is reduced through choosing reasonable sound absorption, insulation materials and noise control methods.The results indicate that exterior accelerating noise is obviously reduced from original 84 dB （A）down to 78 dB （A）by comparing the accelerating motor vehicle test results before and after improvement.The exterior accelerating noise limit of the light-uty truck reaches prescriptive requirement of GB1495-2002.
出处
《汽车技术》
北大核心
2006年第12期12-15,共4页
Automobile Technology
关键词
轻型货车
车外噪声
识别
材料声学性能
噪声控制
Light-duty truck,Automotive exterior noise,Identification,Material acoustic performance,Noise control
