Stochastic dynamic behaviour of hydrodynamic journal bearings including the effect of surface roughness. (July 2018)

• Record Type: Journal Article
• Authors: Maharshi, K.; Mukhopadhyay, T.; Roy, B.; Roy, L.; Dey, S.
• Is Part Of: International journal of mechanical sciences. Volume 142/143(2018)
• Page Start: 370
• Page End: 383
• Publication Date: 2018-07
• Subjects: Hydrodynamic journal bearing -- Stochasticity -- Relative sensitivity -- RBF based MCS; Mechanical engineering -- Periodicals; Génie mécanique -- Périodiques; Mechanical engineering; Maschinenbau; Mechanik; Zeitschrift; Periodicals; 621.05
• DOI: 10.1016/j.ijmecsci.2018.04.012
• Languages: English
• ISSNs: 0020-7403

Abstract

Highlights: A practically relevant in-depth analysis on the stochastic dynamic behaviour of hydrodynamic journal bearings is presented. The individual as well as compound effect of stochasticity in eccentricity ratio and roughness parameter are analysed. An efficient radial basis function based Monte Carlo simulation framework is developed for the probabilistic analysis. Relative sensitivity to stochasticity for different performance parameters is analysed. Abstract: This paper investigates the stochastic behaviour of hydrodynamic journal bearings by solving the Reynolds equation with random parameters numerically based on finite difference method. The steady state and dynamic characteristics are quantified considering random variabilities in eccentricity and surface roughness that can closely simulate the uncertain service conditions and inevitable manufacturing imperfections. Based on efficient radial basis function, a Monte Carlo simulation (MCS) algorithm is developed in conjunction with the governing equations for quantifying stochastic characteristics of the crucial performance parameters concerning hydrodynamic bearings. Relative sensitivity to stochasticity for different performance parameters is analysed. Physically insightful new results are presented in a probabilistic framework, wherein it is observed that the stochasticity has pronounced influence on the performance of bearing. Graphical abstract: