Numerical simulation signal and vibration acceleration signal of a roughing mill main drive speed reduction unit have been decomposed by using empirical mode decomposition algorithm; each component has been carried on spectral analysis.

• 摘要运用经验模式分解算法对数值仿真信号及某轧钢厂粗轧机主传动减速机振动加速度信号进行了分解，从而得到若干个基本模式分量，对每个模式分量进行了频谱分析。