Results of identification and analysis show that main noise source of the model GZ6921 bus is cooling fan.
识别及分析结果表明，冷却风扇噪声是GZ 6921型客车的主要噪声源。
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 recommended.
运用该噪声识别模型及所介绍的测试分析系统，对GZ 6921型后置发动机客车噪声源进行了识别。
An experimental study on the engine noise source identification by the method of surface vibration measurement technique is carried out in this paper.
通过测量柴油机表面振动速度的方法对其进行了表面噪声源识别的研究。
应用推荐