本文简要介绍了Ibrahim时域法(I.T.D.法)识别模态参数的基本原理和实施方法,提出了多种处理噪声的措施。所编程序用于橡胶支承转子系统,分别从运转时域信号和锤击信号中识别出前几阶固有频率和阻尼,取得了实用性效果。并对橡胶支承的状态监测进行了探讨,展示了该法的应用前景。 This paper briefly introduces the basic principles and implementation methods of Ibrahim time domain method (I.T.D.) to identify modal parameters and proposes various measures to deal with the noise. The program is applied to the rubber bearing rotor system, and the first few natural frequencies and damping are identified respectively from the running time domain signal and the hammering signal, and practical results have been achieved. The condition monitoring of rubber bearing was discussed, and the application prospect of this method was demonstrated.