The Combined Effect of Surface Roughness and Elastic Deformation in the Hydrodynamic Slider Bearing Problem

Prakash, J.; Peeken, Heinz

doi:10.1080/05698198508981596

Cited by 12 publications

(13 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The centre-line pressures, p c1 and p c2 , in equations (1) and (2) are caused by the sliding and squeezing effects. The equation for the centre-line pressure can be derived from the pressure distribution of the short journal bearing theory.…”

Section: Model Of a Finite-length Journal Bearingmentioning

confidence: 99%

“…The dimensionless auxiliary functions g r1 , g r2 , g t1 and g t2 in equations (1) and (2) can be described as…”

Section: Model Of a Finite-length Journal Bearingmentioning

confidence: 99%

“…He also mentioned that waviness in uences relatively short bearings, in particular. Prakash and Peeken [2] considered the combined effect of roughness of the surface of the bearing and elastic deformation of the bearing. They performed an analysis of cases in which waviness was applied to both the rotating and the nonrotating surfaces.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Subharmonic vibrations of a roll tube supported by plain journal bearings

Hannukainen

Sopanen

Mikkola

2003

Proceedings of the Institution of Mechanical Engineers, Part K:

View full text Add to dashboard Cite

This study presents a dynamic model for describing a journal bearing with circumferential waviness of the shaft journal. The journal bearing model is based on an analytical solution of the Reynolds equation and de nes the non-linear hydrodynamic forces that act on the journal bearing. The waviness of the shaft journal is modelled through the use of a Fourier cosine series to describe the shape of the lm thickness of the bearing. The waviness of the shaft journal can lead to subharmonic vibrations in which the natural vibration mode of the rotor is excited when the rotation speed is a fraction of the natural frequency of the rotor-bearing system. This phenomenon is investigated in this study utilizing the proposed bearing model in a rotor system simulation. The rotor system under investigation consists of a roll tube, two journal bearings and the supporting structure. The proposed journal bearing model can be used in a general multi-body or rotor dynamics computer code as the interface element between the rotor and the bearing housing. In this study, the model of the journal bearing is implemented in a commercial multi-body simulation software application. This approach enables a detailed analysis of the rotor-bearing system in such a way that the dynamic interaction of the rotor with the bearing is taken into consideration. The simulation result agrees with the experimental measurements obtained from a real roll tube system.

show abstract

Section: Model Of a Finite-length Journal Bearingmentioning

confidence: 99%

“…The dimensionless auxiliary functions g r1 , g r2 , g t1 and g t2 in equations (1) and (2) can be described as…”

Section: Model Of a Finite-length Journal Bearingmentioning

confidence: 99%

See 1 more Smart Citation

Subharmonic vibrations of a roll tube supported by plain journal bearings

Hannukainen

Sopanen

Mikkola

2003

Proceedings of the Institution of Mechanical Engineers, Part K:

View full text Add to dashboard Cite

show abstract

“…They came to the conclusion from the analysis that under deformed condition, the load capacity of the bearing reduces symbolically. Jain et al, 2 Ramanaiah and Sljndarammal, 3 Prakash and Peeken, 4 and Malvano and Vatta 5 assumed the fixed slider bearing as a semi-infinite body for calculating the surface deformation. Higginson, 6 Hooke et al, 7 and O'Donoghue et al 8 applied a shell model for calculating surface deflection in actual machine elements.…”

Section: Introductionmentioning

confidence: 99%

Thermo-elastohydrodynamic lubrication simulation of the Rayleigh step bearing using the progressive mesh densification method

et al. 2018

View full text Add to dashboard Cite

The paper deals with the numerical simulation of thermo-elastohydrodynamic lubrication (Thermo-EHL) condition in the Rayleigh step bearing. Thermo-EHL involves rheology of the lubricant and deformation of the structure simultaneously under the influence of pressure and temperature, which makes this regime of lubrication more complicated. It is difficult to obtain a converged and accurate solution with ease under this condition. The effect of computational mesh density plays a significant role in obtaining a converged solution rapidly. In this paper, the progressive mesh densification (PMD) method has been applied to solve the Thermo-EHL condition numerically. To find out the best possible scheme of PMD for obtaining a converged solution quickly, the results of PMD and fixed mesh density (FMD) have been compared. Based on the comparison, it has been observed that Scheme 3 of PMD takes around 30% fewer iterations compared with FMD under both elastohydrodynamic lubrication (EHL) and Thermo-EHL conditions. Adopting Scheme 3 of PMD, the effect of temperature on the load capacity, coefficient of friction, no-pressure zone, and pressure distribution in the Rayleigh step bearing has been studied. Reductions in pressure, no-pressure zone, frictional coefficient, and load capacity are observed under the Thermo-EHL condition compared to the EHL condition.

show abstract

“…Ting [30] considered the problem of engagement of porous clutch plates simulating it by annular plates incorporating the effect of elastic deformation and surface roughness of the porous housing. Prajapati [23] discussed the performance of a squeeze film between rotating porous circular plates and studied the effects of the surface roughness along with elastic deformation, Prakash and Peeken [31] investigated the effect of surface roughness and elastic deformations in one-dimensional slider bearing and found the existence of strong interaction between the roughness and elastic deformation. Chatchai and Mongkol [32] described the effect of surface roughness and elastic deformation of bearing liner on the static and dynamic characteristic of journal bearings.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Fluid-Based Squeeze Film Behaviour in Curved Porous-Rotating Rough Annular Plates and Elastic Deformation Effect

Shimpi

Deheri

2012

Advances in Tribology

View full text Add to dashboard Cite

Efforts have been directed to study and analyze the squeeze film performance between rotating transversely rough curved porous annular plates in the presence of a magnetic fluid lubricant considering the effect of elastic deformation. A stochastic random variable with nonzero mean, variance, and skewness characterizes the random roughness of the bearing surfaces. With the aid of suitable boundary conditions, the associated stochastically averaged Reynolds' equation is solved to obtain the pressure distribution in turn, which results in the calculation of the load-carrying capacity. The graphical representations establish that the transverse roughness, in general, adversely affects the performance characteristics. However, the magnetization registers a relatively improved performance. It is found that the deformation causes reduced load-carrying capacity which gets further decreased by the porosity. This investigation tends to indicate that the adverse effect of porosity, standard deviation and deformation can be compensated to certain extent by the positive effect of the magnetic fluid lubricant in the case of negatively skewed roughness by choosing the rotational inertia and the aspect ratio, especially for suitable ratio of curvature parameters.

show abstract

The Combined Effect of Surface Roughness and Elastic Deformation in the Hydrodynamic Slider Bearing Problem

Cited by 12 publications

References 6 publications

Subharmonic vibrations of a roll tube supported by plain journal bearings

Subharmonic vibrations of a roll tube supported by plain journal bearings

Thermo-elastohydrodynamic lubrication simulation of the Rayleigh step bearing using the progressive mesh densification method

Magnetic Fluid-Based Squeeze Film Behaviour in Curved Porous-Rotating Rough Annular Plates and Elastic Deformation Effect

Contact Info

Product

Resources

About