Vibration response analysis of rubbing faults on a dual-rotor bearing system

In order to study the dual-rotor system’s rubbing fault, a new dynamic model is established. The unbalance and the rubbing faults are modeled, respectively. Considering the softening characteristics of casing, the Lankarani–Nikravesh model is utilized to describe the impact force between the disk and fixed limiter. The numerical integral method is applied to obtain system’s dynamic behavior, and the characteristics of the rubbing faults are analyzed by time-domain waveform, 3D waterfall plot and spectrum cascades. The influences of rotational speed ratio, initial clearance, mass eccentricity and inter-shaft bearing stiffness on the dynamic characteristics are investigated. The vibration displacement of the low-pressure rotor is collected from the impact experiment performed on a dual-rotor test rig. The analysis result of simulation is identical with the experiment result. Consequently, this method can be used to study characteristics of rubbing faults of dual-rotor bearing system efficiently.

[1]  Itzhak Green,et al.  Nonlinear phenomena, bifurcations, and routes to chaos in an asymmetrically supported rotor-stator contact system , 2015 .

[2]  Hui Ma,et al.  Fixed-point rubbing fault characteristic analysis of a rotor system based on contact theory , 2013 .

[3]  Fulei Chu,et al.  Radial and torsional vibration characteristics of a rub rotor , 2014 .

[4]  Mikhail Guskov,et al.  Experimental and Numerical Investigations of a Dual-Shaft Test Rig with Intershaft Bearing , 2007 .

[5]  Christophe Pierre,et al.  Modeling of a rotor speed transient response with radial rubbing , 2010 .

[6]  Inna Sharf,et al.  Literature survey of contact dynamics modelling , 2002 .

[7]  Te Han,et al.  Dynamic characteristics of rotor system and rub-impact fault feature research based on casing acceleration , 2016 .

[8]  Brian Gleeson,et al.  Thermal Barrier Coatings for Aeroengine Applications , 2006 .

[9]  Na Ta,et al.  Nonlinear dynamics of rub-impact on a rotor-rubber bearing system with the Stribeck friction model , 2015 .

[10]  Hui Ma,et al.  Dynamic characteristics analysis of a rotor–stator system under different rubbing forms , 2015 .

[11]  Yang Yang,et al.  Fixed-point rubbing characteristic analysis of a dual-rotor system based on the Lankarani-Nikravesh model , 2016 .

[12]  Dirk Söffker,et al.  Data-driven stabilization of unknown nonlinear dynamical systems using a cognition-based framework , 2016, Nonlinear Dynamics.

[13]  Agnes Muszynska,et al.  Chaotic responses of unbalanced rotor/bearing/stator systems with looseness or rubs , 1995 .

[14]  Zhiyuan Wu,et al.  Dynamic characteristics analysis of a rotor system with two types of limiters , 2014 .

[15]  Dongxiang Jiang,et al.  Dynamic Characteristics and Experimental Research of Dual-Rotor System with Rub-Impact Fault , 2016 .

[16]  Horst Ecker,et al.  Nonlinear dynamics of a rotor contacting an elastically suspended stator , 2007 .

[17]  Y. S. Choi,et al.  Investigation on the whirling motion of full annular rotor rub , 2002 .

[18]  G. Ferraris,et al.  PREDICTION OF THE DYNAMIC BEHAVIOR OF NON-SYMMETRICAL COAXIAL CO- OR COUNTER-ROTATING ROTORS , 1996 .

[19]  Cheng-Chi Wang,et al.  Theoretical and bifurcation analysis of a flexible rotor supported by gas-lubricated bearing system with porous bushing , 2016 .

[20]  Bangchun Wen,et al.  Periodic motions of a dual-disc rotor system with rub-impact at fixed limiter , 2008 .

[21]  Dongxiang Jiang,et al.  Study on the diagnosis of rub-impact fault based on finite element method and envelope demodulation , 2016 .

[22]  Fulei Chu,et al.  Influence of rotor's radial rub-impact on imbalance responses , 2007 .

[23]  Yang Yang,et al.  A novel contact force model for the impact analysis of structures with coating and its experimental verification , 2016 .

[24]  Lei Hou,et al.  Steady-state response characteristics of a dual-rotor system induced by rub-impact , 2016 .

[25]  Tianhu Yu,et al.  Prediction of dynamic characteristics of a dual-rotor system with fixed point rubbing—Theoretical analysis and experimental study , 2016 .

[26]  Yang Liu,et al.  Stability and steady-state response analysis of a single rub-impact rotor system , 2015 .

[27]  J. Andersons,et al.  Overcritical high-speed rotor systems, full annular rub and accident , 2006 .

[28]  G. Chen,et al.  A New Rotor-Ball Bearing-Stator Coupling Dynamics Model for Whole Aero-Engine Vibration , 2009 .

[29]  Hamid M. Lankarani,et al.  A Contact Force Model With Hysteresis Damping for Impact Analysis of Multibody Systems , 1989 .

[30]  Dongxiang Jiang,et al.  Dynamic Model and Fault Feature Research of Dual-Rotor System with Bearing Pedestal Looseness , 2016 .

[31]  A. Muszynska,et al.  Rotor-To-Stationary Element Rub-Related Vibration Phenomena in Rotating Machinery -- Literature Suryey , 1989 .

[32]  Gui-Quan Sun,et al.  Mathematical modeling of population dynamics with Allee effect , 2016, Nonlinear Dynamics.

[33]  Jian-Bin Zhou,et al.  Nonlinear dynamics of a rub-impact micro-rotor system with scale-dependent friction model , 2008 .

[34]  Yingchun Ren,et al.  Sparsity Preserving Discriminant Projections with Applications to Face Recognition , 2016 .

[35]  Jun Jiang,et al.  Stability Analysis of Sliding Whirl in a Nonlinear Jeffcott Rotor with Cross-Coupling Stiffness Coefficients , 2001 .