Research on vibration performance of the nonlinear combined support-flexible rotor system

Zhang, Luo; Wang, Jinwen; Tang, Rui; Wang, Deyou

doi:10.1007/s11071-019-05176-2

Cited by 53 publications

(21 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Refs. [17,18], the influence of SFD on the spectrum of nonlinear vibration response is discussed. The contribution degree of connection nonlinearity and contact effect to the bistable state is compared.…”

Section: Dynamic Model Of High-pressure Rotormentioning

confidence: 99%

Analysis on Influences of Squeeze Film Damper on Vibrations of Rotor System in Aeroengine

et al. 2022

Self Cite

View full text Add to dashboard Cite

Squeeze film damper (SFD) is widely used in the vibration suppression of aeroengine rotor systems, but will cause complex motions of the rotor system under specific operating conditions. In this paper, a lumped-mass dynamic model of the high-pressure rotor system in an aeroengine is established, and the nonlinear stiffness and damping formula of SFD are introduced into the above model. The vibration responses of the rotor system under different rotating speeds and with different unbalances are investigated numerically, and the influence of SFD on the rotor system vibration and the change of suppression ability are compared and analyzed. The results show that in the case of high speed, together with a small unbalance, the rotor system will perform a complex vibration or a bistable vibration due to SFD. If the unbalance is properly increased under the same case of high speed, the vibration of the rotor becomes single-harmonic and the bistable vibration disappears. The research results can provide a helpful reference for analyzing complex vibration mechanisms of the rotor system with SFD and achieving an effective vibration suppression through unbalance regulation.

show abstract

Section: Dynamic Model Of High-pressure Rotormentioning

confidence: 99%

Analysis on Influences of Squeeze Film Damper on Vibrations of Rotor System in Aeroengine

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…Studying the nonlinear behaviour of the system and identifying the influence of rolling element bearing parameters on the nonlinear behaviours of the rotor system will help to reasonably avoid system instability, increase the operating life, and improve the efficiency of mechanical equipment [10]. us, the rolling bearing supported rotor systems have drawn many research interests [11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Analysis on Multimode Nonlinear Resonance of an Asymmetric Rolling Bearing Rotor with the Application of a Squeeze Film Damper

Chen

Zhong

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

“…Chen et al [31] studied the coupling relationship between rigid-body translation and precession of SFD-unsymmetrical rotor-bearing systems; the results showed that the bifurcation phenomena of asymmetric and symmetric systems are similar, but for asymmetric systems, the stiffness ratio of the left and right supports may destroy the stability of the rotor and cause jumps. Luo et al [32] studied the nonlinear vibration of a single rotor-bearing system containing SFDs, analyzed the bifurcation phenomenon at different points on the rotor, and compared the dynamic response at different positions; their results showed that the nonlinear force at the support caused both the vibration response and the bifurcations of the spool at different parts to differ.…”

Section: Introductionmentioning

confidence: 99%

Coupling vibration analysis of turbine shared support rotor-bearing system with squeeze film dampers

Han

Luo

Wang

et al. 2021

Preprint

View full text Add to dashboard Cite

The turbine shared support structure is used widely in aeroengines, but theoretical and experimental research on a rotor-bearing system containing a shared turbine support structure is lacking. This paper reports research into the coupling vibration response of a squeeze-film-damper rotor-bearing system that has two spools with different rotation speeds and is supported by a turbine shared support structure. The problem is addressed by means of rotor-bearing system tests and the finite-element method. Based on the features of a turboshaft engine with a turbine shared support structure, a rotor-bearing test system with a shared support structure is designed, and a dynamic model of the test system is built based on Timoshenko beam elements. The experimental and simulation results indicate that the unbalanced response of the rotor-bearing system with a shared support structure may involve either the sum or difference of the fundamental frequencies of the rotors of the gas generator and power turbine. The simulations show that the imbalance of the power turbine rotor, the radial and bending stiffnesses of the shared support structure, and the radial clearances of squeeze film dampers at the rear of the rotor-bearing system all affect the coupling response. The amplitude of the coupling response can be suppressed effectively by (i) selecting reasonable parameter values for the turbine shared support structure and (ii) exerting strict control over the spool imbalance.

show abstract

Research on vibration performance of the nonlinear combined support-flexible rotor system

Cited by 53 publications

References 13 publications

Analysis on Influences of Squeeze Film Damper on Vibrations of Rotor System in Aeroengine

Analysis on Influences of Squeeze Film Damper on Vibrations of Rotor System in Aeroengine

Analysis on Multimode Nonlinear Resonance of an Asymmetric Rolling Bearing Rotor with the Application of a Squeeze Film Damper

Coupling vibration analysis of turbine shared support rotor-bearing system with squeeze film dampers

Contact Info

Product

Resources

About