Nonlinear thermal behaviors of the inter-shaft bearing in a dual-rotor system subjected to the dynamic load

Gao, Peng; Chen, Yushu; Hou, Lei

doi:10.1007/s11071-020-05753-w

Cited by 49 publications

(16 citation statements)

References 26 publications

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“…Lu et al [3,4], Thiery and Aidanpäaä [5], and Yang et al [6] used Newton's second law to establish an analysis model of a rotorbearing system containing nonlinear components. Gao et al [7,8] and Hou et al [9] used the Lagrange equations to establish a dynamic model of a dual-rotor-bearing system with nonlinear elements and studied its response. Lu et al [10], Wang et al [11], Chen [12], Yu et al [13], and Yang et al [14] established a dynamic model of dual-rotorbearing and whole-engine systems using the FE method.…”

Section: Introductionmentioning

confidence: 99%

Coupling Vibration Analysis of Turbine Shared Support Rotor-Bearing System with Squeeze Film Dampers

Han

Luo

Chen

et al. 2022

International Journal of Aerospace Engineering

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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 experimental 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 and squeeze film damper is designed, and a finite-element 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 unbalance 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 shared support structure 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 unbalance.

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Section: Introductionmentioning

confidence: 99%

Coupling Vibration Analysis of Turbine Shared Support Rotor-Bearing System with Squeeze Film Dampers

Han

Luo

Chen

et al. 2022

International Journal of Aerospace Engineering

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“…Yang et al [9] established an analytical model, and the vibration responses of the system are calculated in a large speed range with the consideration of different ball numbers and different rotor eccentricities. Gao et al [10,11] developed a nonlinear dynamic model of intershaft bearing in a dual-rotor system, and then the dynamic load of the intershaft bearing is obtained by solving the dynamic equations of the system numerically. An exhaustive parametric analysis for temperatures and nonlinear thermal behaviors of the intershaft bearing affected by dynamic parameters (including the rotation speed ratio, unbalances of rotors, the radial clearance, the stiffness, and the roller number of the intershaft bearing) and thermal parameters (including the lubricant viscosity and the ambient temperature) was carried out.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of Clearances of Cylindrical Roller Bearing Components Based on Dynamic Analysis

Chen

Ma²,

Qiu

et al. 2022

Mathematical Problems in Engineering

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With the continuous advancement in bearing speed, bearing assembly clearance (pocket, radial, and guide clearances) has a particularly significant impact on dynamic characteristics of bearing. In order to improve its performance, it is necessary to generate an optimized design for assembly clearance based on dynamic analysis. In this paper, a dynamic model of cylindrical roller bearing has been put forth based on the variable step fourth-order Runge–Kutta method, while the simulation results have been verified by a high-speed bearing cage motion testing machine. Considering pocket, radial, and guide clearances as independent variables and maximum impact force, whirl deviation ratio, and minimum power loss as the objectives, a multiobjective optimized model of cylindrical roller bearing has been developed using central composite experimental design (CCD) and response surface method. After optimization, the maximum impact force was reduced by 9.26%, the whirl deviation ratio was reduced by 2.87%, and power loss was reduced by 1.45%.

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“…An integral calculation method for the frictional heat generation of rolling bearings is presented by Palmgren [5], which is suitable for low-speed, light-load and good lubrication conditions. Gao [6] proposes a new theoretical method to investigate the thermal behaviours of the inter-shaft bearing considering the nonlinear dynamic characteristics of a dual-rotor system by combining heat transfer and nonlinear dynamics. Wang [7][8] analyses the dynamic characteristics of a dual-rotor system with an inter-shaft bearing and performed a theoretical analysis and an experimental study on the vibrational response characteristics of a dual-rotor with imbalancemisalignment coupling faults.…”

Section: Introductionmentioning

confidence: 99%

Thermal Elastohydrodynamic Lubrication Analysis of High-Speed and Light-Load Rolling Bearing with Double Rings Rotation

Han

Wang

et al. 2022

Teh. vjesn.

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In order to reveal the lubrication performance of the rolling bearing under the condition of double rings s rotation, a novel rolling bearing contact lubrication analysis model for double rings rotation with an improved load distribution is developed. The effects of different parameters, such as the load, slip and speed, on the distribution of the temperature, pressure and film thickness of the rolling bearing are studied. The results show that the change rate of speed in double rings homonymous rotation is greater than that for single ring rotation and double rings reverse rotation on the inner and outer rings. Thus, the temperature change is higher for the former rotation than the latter two rotations. The oil film thickness for double rings reverse rotation is less than that for the other two types of rotations. The pressure distribution for the three types of rotations is more complex than the behaviour of the contact velocity and film. For variable speed, the temperature of the reverse rotation increases with the inner ring speed, which decreases as the outer ring speed increases. The temperature increases with the inner ring speed, which increases with the outer ring speed. The temperature of the double rings homonymous rotation or the reverse rotation increases with the load and slip. This manuscript can serve as a reference for research on the life and reliability of helicopter engine bearings under various rotation conditions.

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Nonlinear thermal behaviors of the inter-shaft bearing in a dual-rotor system subjected to the dynamic load

Cited by 49 publications

References 26 publications

Coupling Vibration Analysis of Turbine Shared Support Rotor-Bearing System with Squeeze Film Dampers

Coupling Vibration Analysis of Turbine Shared Support Rotor-Bearing System with Squeeze Film Dampers

Optimal Design of Clearances of Cylindrical Roller Bearing Components Based on Dynamic Analysis

Thermal Elastohydrodynamic Lubrication Analysis of High-Speed and Light-Load Rolling Bearing with Double Rings Rotation

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