The Comparison of Additional Effects of Journal Bearings Calculated Using the Reynolds and Navier-Stokes Equations

The Comparison of Additional Effects of Journal Bearings Calculated Using the Reynolds and Navier Stokes Equations

článek ve sborníku ve WoS nebo Scopus

en

The contribution gives a brief explanation of a new theory concerning the analysis of dynamic properties of journal bearings, which is based on the Navier Stokes (NS), equation. The analysis comprises of two steps. First the analysis of the stationary movement is carried out and then the non-stationary analysis (dynamic). Movement of the body and fluid can be separated from one another through appropriate transformation. The additional fluid effects, which are mass, damping and stiffness tensors, are only a function of the position of the shaft center. The model sample provides a comparison with the solution obtained as based on the Reynolds (Re) equation.

V příspěvku je uveden teoretický přístup k analýze a přístup k výpočtovému modelování dynamických vlastností tenkých tekutinových vrstev. Je uvedeno porovnání řešení dle dvou přístupů. První přístup vychází z transformace, která má tvar konvolutorního integrálu. Pokud je tekutina stlačitelná, má tento přístup značné omezení. V takovém případě musí být pro separování pohybu tělesa a tekutiny použita jiná transformace. V tomto případě nemá transformace tvar konvolutorního integrálu. Ze závislostí komplexní dynamické síly na frekvenci buzení lze stanovit tenzory přídavných účinků

The contribution gives a brief explanation of a new theory concerning the analysis of dynamic properties of journal bearings, which is based on the Navier Stokes (NS), equation. The analysis comprises of two steps. First the analysis of the stationary movement is carried out and then the non-stationary analysis (dynamic). Movement of the body and fluid can be separated from one another through appropriate transformation. The additional fluid effects, which are mass, damping and stiffness tensors, are only a function of the position of the shaft center. The model sample provides a comparison with the solution obtained as based on the Reynolds (Re) equation.

Journal Bearings, Reynolds Equation, Navier-Stokes Equation, additional mass, damping, stiffness, computational modelling.

Journal Bearings, Reynolds Equation, Navier-Stokes Equation, additional mass, damping, stiffness, computational modelling.

2004

01.04.2004

Tianjin

1-86058-447-0

Proceedings of the 11th world congress in mechanism and machine science

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