Application of the HB–AFT method to the primary resonance analysis of a dual-rotor system

Hou, Lei; Chen, Yushu; Fu, Yiqiang; Chen, Huizheng; Lu, Zhenyong; Liu, Zhansheng

doi:10.1007/s11071-017-3394-4

Cited by 115 publications

(31 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The generalised HBM (GHBM) overcomes this limitation and is able to additionally capture quasiperiodic responses very efficiently [44][45][46]. This technique has been recently applied to a dual-shaft system with REBs [47].…”

Section: Introductionmentioning

confidence: 99%

A parametric study of an unbalanced Jeffcott rotor supported by a rolling-element bearing

2020

View full text Add to dashboard Cite

Rolling-element bearings are widely used in industrial rotating machines, and hence there is a strong need to accurately predict their influence on the response of such systems. However, this can be challenging due to an interaction between the dynamics of the rotor and the bearing nonlinearities, and it becomes difficult to provide a physical explanation for the nonlinear response. A novel approach, combining a Jeffcott rotor supported by a detailed bearing model with the generalised harmonic balance method, is presented, enabling an in-depth study of the complex rotor-stator interaction. This allows the quasi-periodic response of the rotor, due to variable compliance, to be captured, and the impact of clearance, ring and stator compliance, and centrifugal loading of the bearing on the response to be investigated. A strongly nonlinear response was observed due to the bearing, leading to large shifts in frequency as the excitation amplitude was increased, and the emergence of stable and unstable operating regions. The variable compliance effect generated sub-synchronous forcing, which led to sub-resonances when the ball pass frequency coincided with the frequency of one of the modes. Radial clearance in the bearing had by far the largest influence on

show abstract

Section: Introductionmentioning

confidence: 99%

A parametric study of an unbalanced Jeffcott rotor supported by a rolling-element bearing

2020

View full text Add to dashboard Cite

show abstract

“…e studies on dynamic behaviours of the dual-rotor coupled with groups of blades and the effects of the blades on the dual-rotor system are relatively few. Some simplified dynamic models of the dual-rotor system were built [27][28][29], which can be well used to investigate the nonlinear response characteristics for aeroengine dual-rotor system. But in these models, the influence of blade parameters was not fully considered.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Dynamic Characteristics Analysis of Blade-Disk Dual-Rotor System

Zhong²,

Chen

et al. 2020

Complexity

Self Cite

View full text Add to dashboard Cite

In this paper, a simplified dynamic model of a dual-rotor system coupled with blade disk is built, and the effects of blade parameters of an aircraft engine on the dynamic characteristics of a dual-rotor system are studied. In the methodology, the blade is simplified as a cantilever structure, and the dynamical equations are obtained by the means of a finite element method. The amplitude-frequency response curves and orbits of shaft centre-vibration shape diagram are used to analyze the effects of blade parameters on dynamic characteristics of a dual-rotor system. The results indicate that the properties of the blades have huge impacts on the critical speed and other dynamic characteristics of the system. With an increase of the length of the blade, the second-order critical speed decreases obviously, but the first-order critical speed is almost invariant; this means that the blades attached on the low-pressure compressor do not affect the first-order critical speed of the dual-rotor system. Meanwhile, note that the high-pressure rotor and low-pressure turbine rotor can excite the first-order resonance of the dual-rotor system, while the low-pressure compressor rotor can only excite the second-order resonance, and then the dynamic model of this six-point support dual-rotor system can further be simplified as a relatively independent single-rotor system with one disk and a four-support dual-rotor system with dual disks.

show abstract

“…Rotating machines represent the maximal and most important class of machinery used for fluid media transportation, metal working and forming, energy generation, providing aircraft propulsion and other purposes. [1][2][3] High speed and heavy power are the development directions of modern rotating machineries. [4][5][6] In the past decades, there are a lot of literatures that focus on the study of unbalance, 7 clearance, 8 base motions, 9 damping ratio identification, 10 rubbing [11][12][13] and viscoelastic properties of rotor system.…”

Section: Introductionmentioning

confidence: 99%

Dynamical analysis of hollow-shaft dual-rotor system with circular cracks

Yang

Wang

et al. 2020

Journal of Low Frequency Noise, Vibration and Active Control

View full text Add to dashboard Cite

In this paper, we considered a dual-rotor system with crack in shaft. The influence of circular crack in hollow shaft on dynamical response was studied. The equations of motion of 12 elements dual-rotor system model were derived. Harmonic balance method was employed to solve the equations. The critical speed and sub-critical speed responses were investigated. It was found that the circular crack in hollow shaft had greater influence on the first-backward critical speed than the first-forward critical speed. Owing to the influence of crack, the vibration peaks occurred at the 1/2, 1/3 and 1/4 critical speeds of the rotor system, along with a reduction in sub-critical speeds and critical speeds. The deeper crack away from the bearing affected the rotor more significantly. The whirling orbits, the time-domain responses and the spectra were obtained to show the super-harmonic resonance phenomenon in hollow-shaft cracked rotor system.

show abstract

Application of the HB–AFT method to the primary resonance analysis of a dual-rotor system

Cited by 115 publications

References 35 publications

A parametric study of an unbalanced Jeffcott rotor supported by a rolling-element bearing

A parametric study of an unbalanced Jeffcott rotor supported by a rolling-element bearing

Modeling and Dynamic Characteristics Analysis of Blade-Disk Dual-Rotor System

Dynamical analysis of hollow-shaft dual-rotor system with circular cracks

Contact Info

Product

Resources

About