Conference article

Modelling of Asymmetric Rotor and Cracked Shaft

Tatsuro Ishibashi
Meidensha Corporation, Japan

Atsushi Yoshida
Department of Mechanical & Physical Engineering, Osaka City University, Japan

Tadao Kawai
Department of Mechanical & Physical Engineering, Osaka City University, Japan

Download articlehttp://dx.doi.org/10.3384/ecp18148180

Published in: Proceedings of the 2nd Japanese Modelica Conference, Tokyo, Japan, May 17-18, 2018

Linköping Electronic Conference Proceedings 148:26, p. 180-186

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Published: 2019-02-21

ISBN: 978-91-7685-266-8

ISSN: 1650-3686 (print), 1650-3740 (online)

Abstract

The object of this paper is to present asymmetric rotor and shaft models in rotating machinery systems. Using these models it is possible to analyze the electrical motors or generators which have different lateral stiffness or the moments of inertia in two orthogonal directions. The asymmetry causes unstable vibrations in some rotating speed ranges. A cracked shaft model is presented as the extension of the asymmetric shaft model. These models are implemented in our original rotating machinery library.

Keywords

Rotor Dynamics, Asymmetrical Rotor, Asymmetrical Shaft, Cracked Shaft

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