Generally analyses vibration signals of gearcase in some roiling mill by using various spectrum analytical methods ( such as zoom apectrum and cepstrum ) , and finds out that source of exceptional vibration is owing to imbalance of the whole gearing . through assembly adjusting and carrying out dynamic balance test finally solves problems of production practice and ensure that the product line is put into production on schedule 摘要利用各种频谱分析手段（细化功率谱和倒频谱）对某轧钢厂齿轮箱振动信号进行了全面分析，发现整个传动装置产生的不平衡导致齿轮箱振动异常，经过装配调整，并做了动平衡试验，有效地解决了这一问题。
