%0 Journal Article
%T Numerical analysis on the static¨Cdynamic coupling influences of parallelism flaw in disc
%A Bowen Fan
%A Heng Liu
%A Yi Liu
%J Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi
%@ 2041-3068
%D 2018
%R 10.1177/1464419317710886
%X The static¨Cdynamic coupling influences of parallelism flaw are investigated in the disc-rod rotor ball bearing system. Three-dimensional finite element method and a contact solving method are combined to analyze the statics of flawed disc-rod rotor. This analysis shows that parallelism flaw causes mass eccentric and rotation-dependent rotor bow. When these dynamic factors are involved, parallelism flaw promotes the nonlinear complexity in high speed and reduces global stability areas for the flawed disc-rod rotor. Unstable motions are more likely to happen when rotating speed exceeds the critical speed when rotor has a parallelism flaw. The spectrums of flawed rotor are composed of rotating frequency, subharmonic frequency, and their linear combinations. Flawed rotor has a larger bow deformation and orbit size than the ideal rotor. Dynamic stress performs the same property with vibration curves which enables rotors to have the first-order bow deformation. Dynamic stress of flawed rotor is much higher than that of ideal rotor. This paper presents a numerical analysis method to study the static-dynamic features of disc-rod rotor ball bearing system with parallelism flaw
%K Parallelism flaw
%K ball bearing
%K static¨Cdynamic coupling
%K nonlinear dynamics
%U https://journals.sagepub.com/doi/full/10.1177/1464419317710886