摘要
以４９２Ｑ汽油机为例，对其表面噪声分布进行了比较详细的试验分析，绘制了该机上表面、左右侧表面和前端面的噪声三维分布图，并结合测点的声压频谱图对各表面产生振动和噪声的根源进行了分析。
In this paper,the surface noise of 492Q engine is measured and analysed.The 3D distribution maps of noise on each side of engine are drawn,and the sources of noise and vibration are analysed with the sound pressure frequency maps of each measuring point.
基金
国家自然科学基金
