TitleEffect of misalignment of externally pressurized air journal bearings using semi-implicit method
SourceAsiatrib-2018, pp. 473-475
AuthorJaehyeok Lee, Sang-Shin Park


In this study, the effect of misalignments on the instability thresholds of a shaft-bearing system supported by two externally pressurized air journal bearings is investigated. Semi-implicit method is used to reduce computing time for unsteady Reynolds’ equation. The fourth order Runge-Kutta method is applied for solving the equation of motions. In addition, FFT processing is used for analyzing half-frequency whirl phenomena and calculating threshold speed. In this study, a technique is used for calculating non-tridiagonal matrices that have periodic boundary conditions. Results show that the effect of misalignment of journal bearings on the instability is quite significant.


Asiatrib-2018, pp. 473-475