The Hopf bifurcation and chaotic motions of a tubular cantilever impacting on loose support is studied using an analytic model that involves delay differential equations.

Nonlinear vibration of rotor system with pedestal looseness;

The vibrational characteristics of a cracked rotor with pedestal looseness are investigated in this paper.

With a view to the argument that the fault most frequently found is of the bearing′s looseness of the motor when it is running, the outstanding features and the causes for that looseness produced are presented in the paper, inclusive of the main factors.

Analysis on vibration characteristics of rotor system with pedestal looseness;

Chaotic behaviour of a rotor bearing system with pedestal looseness;

According to the specific features of a non-linear rolling element bearing-rotor system with pedestal looseness at one support, this paper derived its dynamical equations by using the theories of Hertz theory,nonlinear dynamics and rotor dynamics, which took into account the nonlinear condition of the looseness.

The shortcommings of locally manufactured supports for IPB crossover sections are discussed, simultaneously pointing out the necessity of using floating supports.