Abstract:

The dynamical models of flexible rotor bearing systems are constructed using FEM. A time frequency domain hybrid method of identifying the dynamic characteristic parameters of journal bearings and the unbalances of the rotor on field condition and without artificial excitations is proposed. Using this method,the dynamic characteristic parameters of each bearing can be identified separately or altogether. Apart from realizing ′on the spot′ and ′on line' identification,the proposed method almost has no influence on the rotor bearing system.Finally, reasonable experimental results are introduced.

Key words: rotor -bear ing systems, liquid bear ings, dynamic cha racter istics, parameter ident ification