本文提出了一种根据幅值频响数据来识别模态参数的频域识别法.该方法首先通过识别幅值频响函数模型来得到传递函数的零点和极点.鉴于不同结构系统可以有完全相同的幅值频响函数,文中提出了由相位频响数据来判定传递函数零点的号性,以唯一确定传递函数,从而消除了相位噪声对模态参数识别结果的影响.作为例子,文中给出了计算机模拟实验例子和滚动轴承支承动态参数识别的应用实例. In this paper, a frequency-domain identification method based on amplitude-frequency response data is proposed to identify modal parameters. Firstly, the zero and pole of the transfer function are obtained by identifying the amplitude-frequency response function model. Since different structural systems can have exactly the same The frequency response function is proposed in this paper to determine the sign of the zero of the transfer function by the phase frequency response data so as to uniquely determine the transfer function and eliminate the influence of phase noise on the result of modal parameter identification as an example An example of computer simulation experiment and dynamic parameter identification of rolling bearing support are given.