A4 Conference proceedings

Effect of Operational Temperature on Contact Dynamics of Shrink-Fitted Compressor Impeller Joint


Publication Details
Authors: Sikanen Eerik, Heikkinen Janne, Sopanen Jussi
Publication year: 2019
Language: English
Related Journal or Series Information: Mechanisms and Machine Science
Title of parent publication: IFToMM WC 2019: Advances in Mechanism and Machine Science
Volume number: 73
Start page: 3341
End page: 3351
Number of pages: 11
ISBN: 978-3-030-20131-9
ISSN: 2211-0984
JUFO-Level of this publication: 1
Open Access: Not an Open Access publication

Abstract

In this paper, the contact behavior of a shrink-fitted joint in a
rotor assembly at different spin speeds using the three-dimensional
solid finite element approach with inclusion of thermal expansion effect
is studied. A custom contact model is utilized for shrink-fitted joint
analysis under centrifugal and thermal loads. Theory for applying the
nodal temperature to the thermal expansion force vector for
three-dimensional finite elements is presented and implemented.
Shrink-fitted conical impeller rotor assembly is studied, and the
results are presented in Campbell diagram form. The reduction of the
interference of the shrink-fitted joint due to centrifugal and thermal
forces at high-speed operation as well as the contact status are updated
at each rotational speed step. Based on the results presented in this
paper, the thermal expansion force will have an effect on the natural
frequencies of the rotor system.


Last updated on 2020-20-03 at 10:03

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