Finite element method for mixed elastohydrodynamic lubrication of journal‐bearing systems

Liu, Wing Kam; Xiong, Shangwu; Guo, Yuanyuan; Wang, Q. Jane; Wang, Yansong; Yang, Qin; Kumar, Vijay

doi:10.1002/nme.1022

Cited by 19 publications

(7 citation statements)

References 31 publications

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“…The detailed solution procedure for full implicit integration by using the modified Newton-Raphson method for the final system Eqs. [10] can be found in Liu, et al (15).…”

Section: Full-film Lubricationmentioning

confidence: 94%

Approaching Mixed Elastohydrodynamic Lubrication of Smooth Journal-Bearing Systems with Low Rotating Speed

Xiong¹,

Wang²,

Liu³

et al. 2006

Tribology Transactions

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When a conformal interface is under low velocity and heavy load conditions, solid contact (or dry contact) may occur even in a system with smooth surfaces. This paper presents two approaches for solving steady-state and transient mixed elastohydrodynamic lubrication problems of journal bearings with smooth surfaces under low rotating speed. The first approach uses the reduced Reynolds equation with a combined finite element-backward finite difference scheme and the second applies a zero film thickness equation to describe the mechanical behavior of mating surfaces at solid contact points. The major advantages of these two approaches are (1) (2) the solid contact pressure, lubricant pressure, and eccentricity ratio can be solved simultaneously. Numerical examples are presented for the application of these approaches. For the steady-state cases under low velocity studied in this work, pressure distributions approach those found in a dry contact state. This comparison confirms that the contact treatments are proper. Moreover, a transient case under sinusoidal loading was analyzed with these two approaches, and the results showed good agreement. This comparison further supports the use of these approaches. no division of the solution domain into a lubricated area and a solid contact area is necessary and

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“…The detailed solution procedure for full implicit integration by using the modified Newton-Raphson method for the final system Eqs. [10] can be found in Liu, et al (15).…”

Section: Full-film Lubricationmentioning

confidence: 94%

Approaching Mixed Elastohydrodynamic Lubrication of Smooth Journal-Bearing Systems with Low Rotating Speed

Xiong¹,

Wang²,

Liu³

et al. 2006

Tribology Transactions

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“…Among various models published, the average Reynolds equation [1,2], which rewrites the Reynolds equation, descripting of smooth surface lubrication flow, in terms of the averaged flow factors, has enjoyed wide recognition and led to numerous publications [3][4][5][6][7]. However, the stochastic models deal only with the global effect of surface roughness, and predict average parameter values of the rough surface [8].…”

Section: Introductionmentioning

confidence: 98%

A deterministic multiscale computation method for rough surface lubrication

Pei

Shi

2016

Tribology International

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“…The ML model was employed to investigate the influence of surface roughness. So far, most studies have been focused on static characteristics of the bearing in the ML regime [16][17][18][19][20] and studies regarding dynamic properties in the ML regime are limited. Guha 21 used Christensen's stochastic model 22 and the one-order perturbation method to evaluate dynamic coefficients under isotropic roughness.…”

Section: Introductionmentioning

confidence: 99%

Study of dynamic coefficients of water film in marine stern tube bearing considering roughness and deformation

Leng

Zhang³

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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Dynamic analysis of water-lubricated marine stern tube bearing is incompatible with that of ordinary oil-lubricated bearing due to the deformation of compliant bushes and non-negligible roughness effects. A modified bearing dynamic analysis model embracing roughness and dynamic characteristics of a non-metal bush is proposed. Based on the model, Reynolds equations of perturbed pressures of water film considering roughness, deformation, and misalignment simultaneously are derived for the first time and solved by coupling the finite difference method and the finite-element method. The results show that dynamic coefficients are enhanced due to roughness when the minimum film thickness ratio exceeds a threshold around 2. The roughness effect is debilitated but the valid range of roughness is extended when bush deformation is considered. Additionally, dynamic coefficients of rougher bearing become obviously smaller than those of smoother bearing as the misalignment angle grows.

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Finite element method for mixed elastohydrodynamic lubrication of journal‐bearing systems

Cited by 19 publications

References 31 publications

Approaching Mixed Elastohydrodynamic Lubrication of Smooth Journal-Bearing Systems with Low Rotating Speed

Approaching Mixed Elastohydrodynamic Lubrication of Smooth Journal-Bearing Systems with Low Rotating Speed

A deterministic multiscale computation method for rough surface lubrication

Study of dynamic coefficients of water film in marine stern tube bearing considering roughness and deformation

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