A new nonlinear dynamic analysis method of rotor system supported by oil-film journal bearings

Liu, Yang; Wang, Weimin; Zhao, Shiquan; Sun, Yanjing; Yu, Lie

doi:10.1016/j.apm.2014.04.024

Cited by 38 publications

(30 citation statements)

References 18 publications

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“…Figure 3. Assuming that displacement and velocity remain small disturbances in the vicinity of the static position O 0 (x 0 , y 0 ) [1], the first-order expansion of dynamic bearing forces (i.e., F x and F y ) is defined bywhere (zF i /zj) | 0 (i � x, y; j � x, y, _…”

Section: Dynamic Model Of Compound Planetarymentioning

confidence: 99%

“…e compound planetary gear train, which performs well in compactness, high power density, and large torque-toweight ratio, is widely used in ship, helicopter, wind turbine, etc. As for heavy machinery transmission systems, journal bearings typically support the carrier and planet in compound planetary gear train, and their stiffness and damping are unequal in all directions [1]. Vibration noise is an important factor affecting the stability and reliability of the gearbox.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Dynamic Model Of Compound Planetarymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics of Encased Differential Gear Train with Journal Bearing

Yang

Yue²,

Zhu

et al. 2020

Mathematical Problems in Engineering

View full text Add to dashboard Cite

show abstract

“…They concluded that the proposed nonlinear modeling of oil film forces can be employed in the nonlinear dynamic analysis of other types of oil-film bearings. The aforementioned research [9][10][11][12][13][14][15][16][17][18] have indicated the ability of the nonlinear models based on higher order Taylor series expansion of oil film forces to identify the nonlinear effects within the associated journal bearings.…”

Section: Introductionmentioning

confidence: 99%

“…They concluded that rise in these parameters leads to increase in dynamic coefficients, and the nonlinear effects in oil-film forces are significant at heavy static loads. Yang et al [18] extended the partial derivative method to identify the linear and second-order nonlinear dynamic coefficients of finite-length bearings.…”

Section: Introductionmentioning

confidence: 99%