Yongfeng Yang

TL;DR: In this article, the authors investigated the accelerating up transient vibrations of a rotor system under both the random and uncertain-but-bounded parameters, and used the Polynomial Chaos Expansion (PCE) coupled with the Chebyshev Surrogate Method (CSM) to analyze the propagations of the two categorizes of uncertainties.

TL;DR: In this article, the dynamic responses of an elastically supported uncertain overhung rotor are studied in which uncertain parameters are treated as unknown-but-bounded interval variables, and a non-intrusive interval method based on Chebyshev polynomial approximation is proposed to evaluate the uncertain dynamic response of the rotor system.

TL;DR: In this paper, the motion equations for a Jeffcott rotor in hover flight are derived and a periodically sampled peak-to-peak value diagram is used for characterizing and distinguishing different types of nonlinear responses in hovering state.

TL;DR: This paper investigates the effects of interval uncertain parameters on the dynamic behaviors of a rotor system with a transverse breathing crack in the shaft and develops a surrogate model for the uncertain problem to determine the bounds of the nonlinear dynamic responses.

TL;DR: The transient characteristic-based balancing method (TCBM) combined with dynamic load identification (DLI) technique to identify the unbalance parameters of the general rotor system is proposed and will facilitate the on-site dynamic balancing process by designing a complete set of balancing system tools for rotor dynamics analysts based on the TCBM.