后置发动机客车噪声源的识别

应用相关分析与谱分析理论，建立了后置发动机客车噪声源识别的多输入单输出模型。运用该噪声识别模型及所介绍的测试分析系统，对GZ6921型后置发动机客车噪声源进行了识别。识别及分析结果表明，冷却风扇噪声是GZ6921型客车的主要噪声源。

Identification of Noise Source for Bus Having Rear Mounted Engine

Multiple input and single output model of noise source identification for bus hav ing rear mounted engine is establised by applying theory of correlative analysis and spectrum analy sis. Noise source identification for the model GZ6921 bus having rear mounted engine has been car ried out by means of the noise source identification model with testing and analysing system recom mended. Results of identification and analysis show that main noise source of the model GZ6921 bus is cooling fan.