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Numerical Calculation to the Pressure Distribution of Journal Bearing Based on the Matlab

Author: WangNing
Tutor: SongXiGeng;XueDongXin
School: Dalian University of Technology
Course: Power Machinery and Engineering
Keywords: Journal bearing Elastic deformation Numerical calculation Finite element method
CLC: TH133.31
Type: Master's thesis
Year: 2006
Downloads: 1734
Quote: 33
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Abstract


In the past, the research and design of journal bearing were taken on the premise of assuming the bearing is rigid . However, due to more and more journal bearings nowadays so operating under conditions of high speed and heavy load would produce higher oil film pressure than before, as well as the prevalence of thin bearing and the developing tendency of lower elasticity modulus of bearing material, the elastic deformation of bearing can no longer be neglectedThis paper employs the finite difference method to study the performance of rigid journal bearing and compares the results to some classical research conclusions accepted widely. The outcomes are very consistent and further prove that the applied algorithm and programming language and principle are very reliable.In the condition of considering the elastic deformation of bearing, a new coupling algorithm is developed through applying the difference method and the finite-element method simultaneously to numerically solve the problem of the pressure distribution in the oil film and the elastic deformation of journal bearing. This algorithm features high speed of convergence and precision and is more reasonable compared with others. By calculating a practical journal bearing, the changes of each lubrication performance of journal bearing with and without considering the effect of elastic deformation are studied and analyzed in detail.The analysis results show that the influences of elastic deformation of bearing on the performance of journal bearing should no longer be neglected, especially in the case of high eccentricity ratio.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanical parts and gear > Moving parts > Bearing > Plain bearings
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