Title

Oil whirl and critical instabilities in rotor-bearing systems

Author

Ehtisham Uddin Ahmad Siddiqui, Syracuse University

Date of Award

1979

Degree Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Mechanical and Aerospace Engineering

Advisor(s)

R.M Evan-Iwanoski

Keywords

oil whirl

Subject Categories

Mechanical Engineering

Abstract

Two different models are used to study the phenomenon of oilw whirl and to determine the damped natural frequencies of the system. In the whirl analysis, the captivated fluid film is represented by eight linearized coefficients. The supports have an analagous representation and the governing equations of motion are tested for stability using the original Routh criterion. For the determinationof the damped critical speeds, a transfer matrix scheme is developed and the complex eigenvalues extracted through an interactice procedure.

Recommended Citation

Siddiqui, Ehtisham Uddin Ahmad, "Oil whirl and critical instabilities in rotor-bearing systems" (1979). Mechanical and Aerospace Engineering - Dissertations. 49.
https://surface.syr.edu/mae_etd/49

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