Study of Rotor Vibration due to the Rubbing against Casing (Relation Casing Dynamics and Configuration between Sub-Harmonic Vibration Generating)

Modeling of Rotating Shaft with Partial Rubbing

“…The relationship between the contact configurations and the generation of various kinds of vibration such as "collision type synchronous vibration", "sub harmonic vibration", etc. obtained by simulation showed the same trend as the previous papers (Watanabe et al, 2004;Watanabe et al, 2005). We validated our model with partial rubbing in the one side contact case with a rotor kit.…”

“…Although there was a small difference between our simulation results and the previous papers (Watanabe et al, 2004;Watanabe et al, 2005) due to the differences of the parameters amplitudes in the rubbing component, the relationship between the contact configurations and the generation of various kinds of vibration obtained in this paper showed the same trend as those papers.…”

“…The contact damping constant were estimated by Equation 16 using the approximate value of the coefficient of the restitution (Jackson et al, 2009). The friction coefficient was estimated from the value reported in the paper (Watanabe et al, 2004). Figure 19 - Figure 21 show the results under rubbing condition.…”

“…The relationship between the contact configurations and the generation of various kinds of vibration, such as "collision type synchronous vibration", "sub harmonic vibration", etc. has been studied, both theoretically and experimentally (Watanabe et al, 2004;Watanabe et al, 2005). We have created the rotating machinery library by transfer matrix method in Modelica (Ishibashi et al, 2017).…”

Review of Research on Nonlinear Rotordynamics in Japan

“…Watanabe et al (89) studied subharmonic resonances which occur when a rotor has contact with a casing. In magnetic bearings, there is clearance between a rotor and a backup bearing.…”