Nonlinear behavior analysis of geared rotor bearing system featuring confluence transmission

Gao, Hongbo; Zhang, Yidu

doi:10.1007/s11071-014-1266-8

Cited by 29 publications

(13 citation statements)

References 30 publications

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“…Most studies used invariant oil film stiffness and damping of journal bearings 14 or simplified oil film force models 15,16 to simulate the effect of journal bearings on the gear system. However, the simplifications decrease the analysis accuracy under the dynamic mesh force conditions.…”

Section: Neural Network Model For Time-varying Oil Film Stiffness and Dampingmentioning

confidence: 99%

“…Cui et al 15 investigated the effect of oil film force on a geared rotor system with a short journal bearing model to represent nonlinear oil film force, and they found that oil film force has an important impact on the nonlinear mesh force and vibration characteristics of gear system. Gao and Zhang 16 studied the nonlinear vibration characteristics of geared rotor bearing system and interactions among gears, shafts and plain journal bearings; the nonlinear oil film forces were computed with the short bearing assumption. The results indicated that journal bearings take a dominated effect on the system vibration at higher frequencies.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical and experimental studies on dynamics of double-helical gear system supported by journal bearings

Yin

Chen

2016

Advances in Mechanical Engineering

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The dynamic behaviour of a double-helical gear system supported by journal bearings is theoretically and experimentally investigated in this study. A bending-torsional-axial coupling model for dynamic analysis of double-helical gear system is developed. Influence of the time-varying mesh stiffness and damping is considered. Oil film stiffness and damping of the supporting journal bearing are supposed to be time-varying, and the time-varying oil film stiffness and damping are predicted by a back propagation neural network, which is optimized by genetic algorithm. A double-helical gear-rotor-journal bearing system test rig is also established to carry out the experimental investigations, such as the dynamic transmission errors of gear pairs. The comparisons between theoretical and experimental results show that the timevarying oil film dynamic coefficients of journal bearings are an important internal excitation. The theoretical model with time-varying oil film stiffness and damping can predict the gear dynamics more accurate than the model with time-invariant oil film stiffness and damping, and the neural network optimized by genetic algorithm can obtain the time-varying oil film stiffness and damping efficiently and accurately for the dynamic analysis of double-helical gear system.

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Section: Neural Network Model For Time-varying Oil Film Stiffness and Dampingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental studies on dynamics of double-helical gear system supported by journal bearings

Yin

Chen

2016

Advances in Mechanical Engineering

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“…Some researchers [2][3][4][5] focused on the construction of the gear-rotor dynamics model. Using the finite element method, Baguet and Jacquenot [2] established a gearrotor-bearing coupling model, in which the time-varying properties and nonlinearities of gears and bearings were introduced.…”

Section: Introductionmentioning

confidence: 99%

“…Using the finite element method, Baguet and Jacquenot [2] established a gearrotor-bearing coupling model, in which the time-varying properties and nonlinearities of gears and bearings were introduced. Gao and Zhang [3] investigated the gearbearing dynamic interactions using a dynamic model of a rotor-bearing system with confluence transmission. eodossiades and Natsiavas [4] studied the dynamic response of the gear-rotor coupled system under the action of oil film force and meshing force and not only investigated the oil film stability but also analyzed the amplitude-frequency response.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics of Encased Differential Gear Train with Journal Bearing

Yang

Yue²,

Zhu

et al. 2020

Mathematical Problems in Engineering

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Taking the marine encased differential gear train as an example, the relationship between the journal bearing parameters and the meshing force of the transmission system is analyzed. In this paper, the dynamic model of the encased differential gear train with journal bearing is established considering the factors of time-varying meshing stiffness and comprehensive transmission error. In this dynamic model, four stiffnesses and four damping coefficients are applied to characterize the asymmetry and interaction of the oil film stiffness and damping of planet bearing. The system responses are calculated by the Fourier series numerical algorithm. The results show that the introduction of journal bearing in encased differential gear train can contribute to gearbox vibration reduction. Moreover, the planet bearing parameters (e.g., clearance-to-radius ratio and eccentricity ratio) of the differential stage affect the meshing forces of both the differential and encased stages. In addition, the influence of the planet bearing parameters of the encased stage on the meshing force of the encased stage is more obvious than that of the differential stage. This work may develop a theoretical analysis framework for the design and manufacture of marine transmission systems in the future.

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“…In order to examine the influence of the tooth contact temperature in the meshing surface on the dynamics in the gear system, Gou [27] calculated the flash temperature in tooth surface of a single-stage spur gear system, which indicated the tooth contact temperature had an obvious effect on the dynamics of the gear system. Gao [28][29] studied the nonlinear vibration characteristics of geared rotor bearing system and the interactions among gears, shafts, and plain journal bearings, the dynamic interactions were demonstrated through the analysis of dynamic gear loads and dynamic bearing loads, and the coupling effect behaved different when rolling frequency changed. Hu [30][31] proposed a multi-degree-of-freedom (MDOF) lumped parameter dynamic model considering the coupled translation-rotation vibration and the coupled multi-body dynamics of the face geared rotor system were studied by using the Runge-Kutta numerical method and the effects of mean load and backlash on the dynamic responses were explored.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamic analysis of a coupled lateral-torsional spur gear with eccentricity

Ren¹,

Li²,

Wang³

et al. 2016

J. vibroeng.

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In this study, the dynamic behaviors of gear system are systematically analyzed with coupled lateral-torsional vibration caused by the gear meshing. A 4-degree-of-freedom (DOF) lumped parameter dynamic model for a spur gear, considering gravity, backlash, eccentricity, transmission errors, external excitation, is proposed. Parametric studies are performed to understand the influence of key parameters such as rotational speed , backlash and error fluctuation on the nonlinear dynamic behavior. The frequency response characteristics of spur gear system show that lateral resonance frequency and torsional resonance frequency simultaneously exhibit in lateral direction. In addition, other nonlinear phenomena including various forms of periodic, quasi-periodic and chaotic vibrations are analyzed. The results show that the nonlinear dynamical behaviors such jump discontinuous phenomena, single-sided impact and double-sided impact are strongly attributed to interaction between backlash, eccentricity and error fluctuant amplitude. Significantly, the appropriate rotational speed and decrease error fluctuant amplitude could effectively control the nonlinear vibration. Whereas the backlash has a complicated effect on the nonlinear dynamical characteristics. The results presented in this paper show that an analysis of the coupled lateral-torsional vibration (CLTV) of the spur transmission gear system. Some research results presented in this paper are useful to dynamic design and vibration control of spur gear transmission system.

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Nonlinear behavior analysis of geared rotor bearing system featuring confluence transmission

Cited by 29 publications

References 30 publications

Theoretical and experimental studies on dynamics of double-helical gear system supported by journal bearings

Theoretical and experimental studies on dynamics of double-helical gear system supported by journal bearings

Dynamic Characteristics of Encased Differential Gear Train with Journal Bearing

Nonlinear dynamic analysis of a coupled lateral-torsional spur gear with eccentricity

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