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Research Papers

Nonlinear Dynamic of a Geared Rotor System With Nonlinear Oil Film Force and Nonlinear Mesh Force

[+] Author and Article Information
Yahui Cui

 School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, Chinacuiyahuicui@163.com

Zhansheng Liu

 School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, Chinalzs@hit.edu.cn

Yongliang Wang

 School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, ChinaVibw@qq.com

Jianhuai Ye

 School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, Chinayejianhuai@163.com

J. Vib. Acoust 134(4), 041001 (May 31, 2012) (8 pages) doi:10.1115/1.4005032 History: Received March 07, 2009; Revised August 16, 2011; Published May 29, 2012; Online May 31, 2012

To investigate the effect of oil film force on a geared rotor system, a short journal bearing model was applied to represent nonlinear oil film force. A dynamic model of the geared rotor oil journal bearing system was presented. The nonlinear gear mesh force and nonlinear oil film force were considered in the model. The nonlinear dynamic responses of the system were investigated by numerical integration method. This article shows that when the rotational speed is relatively low, the vibration of the system is mainly affected by nonlinear mesh force. With the increase of rotational speed, the influence of nonlinear oil film force also increases gradually, and the subsynchronous forward precession phenomena appear. When the speed increases to a certain value, the amplitude of the subsynchronous forward precession exceeds the amplitude of the rotational frequency, and the nonlinear mesh force is greatly affected by the nonlinear oil film force. However, the linear oil film force does not affect the nonlinear mesh force. The subsynchronous forward precession is difficult to be predicted by linear oil film force which was previously applied. This experiment is performed to validate the correctness of the dynamic model presented, and the numerical integration results of low speeds are validated by the experimental data.

Copyright © 2012 by American Society of Mechanical Engineers
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References

Figures

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Figure 23

The result of experiment when speed is 2300 rpm (rolling bearing stiffness)

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Figure 24

Geared rotor oil journal bearing test-bed

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Figure 25

The result of calculation when speed is 2000 rpm (nonlinear oil film force)

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Figure 26

The result of experiment when speed is 2000 rpm (nonlinear oil film force)

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Figure 27

The result of calculation when speed is 2500 rpm (nonlinear oil film force)

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Figure 28

The result of experiment when speed is 2500 rpm (nonlinear oil film force)

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Figure 1

Interaction between two gears in the process of normal mesh status

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Figure 2

Time-varying mesh stiffness

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Figure 3

Static transmission error

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Figure 4

Interaction between two gears in the process of back side collision status

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Figure 5

Geared rotor rolling bearing test-bed

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Figure 6

Displacement’s spectrum plot (5500 rpm)

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Figure 7

Spectrum plot with nonlinear oil film force (5500 rpm)

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Figure 8

Displacement’s spectrum plot (6500 rpm)

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Figure 9

Spectrum with nonlinear oil film force (6500 rpm)

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Figure 10

Displacement’s spectrum plot (7500 rpm)

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Figure 11

Spectrum plot with nonlinear oil film force (7500 rpm)

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Figure 12

Displacement’s spectrum plot (8500 rpm)

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Figure 13

Spectrum with nonlinear oil film force (8500 rpm)

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Figure 14

Displacement’s spectrum plot (9500 rpm)

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Figure 15

Spectrum plot with nonlinear oil film force (9500 rpm)

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Figure 16

Displacement’s spectrum plot (11,000 rpm)

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Figure 17

Spectrum with oil film force (11,000 rpm)

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Figure 18

The result of calculation when speed is 1000 rpm (rolling bearing stiffness)

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Figure 19

The result of experiment when speed is 1000 rpm (rolling bearing stiffness)

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Figure 20

The result of calculation when speed is 1500 rpm (rolling bearing stiffness)

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Figure 21

The result of experiment when speed is 1500 rpm (rolling bearing stiffness)

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Figure 22

The result of calculation when speed is 2300 rpm (rolling bearing stiffness)

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