【摘要】 本文利用复声强法对４９２Ｑ汽油机的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３维分布图，结合测点的声压频谱图，对各表面产生噪声的根源进行了分析。更多还原

【Abstract】 In this paper,the surface noise distribution of 492Q engine was measured and analysed by means of complex acoustic intensity method.The 3D distribution maps of noise on top of engine,left side and right side of engine,and front of engine were drawn.With the sound pressure frequency maps of each measuring point,the sources giving out noise were analysed.更多还原