基于近声场识别法的某大型客车不同车速下噪声测试与分析

Noise Testing and Analysis of a Large Coach at Different Speeds Based on Near Sound Field Recognition

以某大型客车作为研究对象,采用近声场识别法对其主要噪声源近场位置噪声进行测试和分析,研究不同车速下发动机噪声、进排气噪声、冷却风扇噪声、轮胎噪声等主要噪声源近场位置的噪声贡献量,为同类客车的分区域的被动降噪工作提供理论依据,为整车针对性的声学包优化措施提供数据支撑。

Taking a large coach as the research object,the near-sound field recognition is used to test and analyze the near-field position noise of its main noise source. By studying the noise contribution of the main noise sources such as engine noise,infested and exhaust noise,cooling fan noise and tire noise at different vehicle speeds,it provides theoretical basis for the passive noise reduction work in the sub-regions of similar passenger cars,and also provides data support for the specific acoustic package optimization measures of the coach.