汽车变速器噪声预估的研究

本文利用边界元和声强测量技术对变速器的辐射噪声进行了预估计算，并导出了辐射噪声和模态参数间的数学关系，利用此关系对变速器的辐射噪声进行了预估，文中最后叙述了用声强测量数据与上述两种预估数据的比较，实测与预估还是比较吻合的，这就为噪声预估提供了一种新的方法。

Research on Noise Prediction for Automobile''s Transmissions

The radiation noise of an automotive gearbox is estimated using boundary integral equation and sound intensity measuring technique. The mathematical relationship between the radiation noise and the modal parameters is deduced and used to estimate the radiation noise of gearbox. The comparison between the data from sound intensity measuring and from two abovementioned estimating methods is made. The result of measurement is rather coincident with that of predicting and thus a new method is provided for noise prediction.