Efficient numerical computation of the steady-state response and stability analysis of the rotor systems with squeeze film dampers

0538952 - ÚT 2021 RIV CZ eng C - Conference Paper (international conference)
Molčan, M. - Ferfecki, P. - Zapoměl, Jaroslav
Efficient numerical computation of the steady-state response and stability analysis of the rotor systems with squeeze film dampers.
ENGINEERING MECHANICS 2020. Brno: Brno University of Technology Institute of Solid Mechanics, Mechatronics and Biomechanics, 2020 - (Fuis, V.), s. 354-357. ISBN 978-80-214-5896-3. ISSN 1805-8248.
[International Conference Engineering Mechanics 2020 /26./. Brno (CZ), 24.11.2020-25.11.2020]
Institutional support: RVO:61388998
Keywords : harmonic balance method * Floquet theory * Hill’s method * nonlinear forces * flexible rotor
OECD category: Applied mechanics
https://www.engmech.cz/im/doc/EM2020_proceedings.pdf

The aim of this paper is to demonstrate capabilities of the created numerical procedure, which is based on harmonic balance method. Furthermore, the procedure incorporates the alternating frequency-time domain technique and the arc-length parameterization to solve the steady-state response of nonlinear systems in efficient manner, including unstable branches. The stability of the motion was assessed by two methods: the 2n-pass method and Hill’s method. The procedure was verified on an example from literature to prove its sufficient accuracy and subsequently, the procedure was applied on the finite element model of the rotor systém mounted on the squeeze film dampers. The carried out computational simulations confirmed that the created procedure is efficient for the strongly nonlinear response and it gives similar results as the time integration.
Permanent Link: http://hdl.handle.net/11104/0316859