DYNAMIC DEM MODEL OF MULTI-SPANS ROTOR SYSTEM

In this paper, the DEM is introduced for the investigation of non-linear dynamical behavior of rotor systems. The modelling procedure and constitutive relations were explained in detail. This model may be used for most of the dynamical problems of rotor systems, such as rub-impacting, bending vibration, torsional vibration, etc. It is especially suitable for studying the rub-impacting problem of rotor system due to the consideration of variable characteristic of friction force with time.