Reduction of defective gyroscopic rotor system models: Modal partial decoupling versus component mode synthesis.

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Reduction of defective gyroscopic rotor system models: Modal partial decoupling versus component mode synthesis.

Popis výsledku v původním jazyce

Rotor supported in strongly non-linear bearings can be for the purpose of transient analysis treated as a free-free rotor with bearing reactions acting as excitation forces. Finite element models of such rotor are accessible by numerical solvers in physical domain, although the number of degrees of freedom might be unnecessarily high for adequate description of system dynamics. In such cases a reduction of free-free rotor model is desirable. When non-negligible gyroscopic effects are present, the free-free rotor model turns into defective system, that is non-diagonalizable in terms of spectral decomposition. It is shown that defectiveness of this system relates to its rigid modes. Feasibility of three potential reduction methods are studied at this paper: Modal reduction by partial decoupling of the system (neglecting gyroscopic matrix for modal matrix assembly), Craig-Bampton method in state space for generalized damping, and the approach of classical Craig-Bampton method with partial

Název v anglickém jazyce

Reduction of defective gyroscopic rotor system models: Modal partial decoupling versus component mode synthesis.

Popis výsledku anglicky

Rotor supported in strongly non-linear bearings can be for the purpose of transient analysis treated as a free-free rotor with bearing reactions acting as excitation forces. Finite element models of such rotor are accessible by numerical solvers in physical domain, although the number of degrees of freedom might be unnecessarily high for adequate description of system dynamics. In such cases a reduction of free-free rotor model is desirable. When non-negligible gyroscopic effects are present, the free-free rotor model turns into defective system, that is non-diagonalizable in terms of spectral decomposition. It is shown that defectiveness of this system relates to its rigid modes. Feasibility of three potential reduction methods are studied at this paper: Modal reduction by partial decoupling of the system (neglecting gyroscopic matrix for modal matrix assembly), Craig-Bampton method in state space for generalized damping, and the approach of classical Craig-Bampton method with partial

Druh

D - Stať ve sborníku

CEP obor

JR - Ostatní strojírenství

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Computational Mechanics 2011

ISBN

978-80-261-0027-0

ISSN

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e-ISSN

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Počet stran výsledku

2

Strana od-do

1-2

Název nakladatele

Západočeská univerzita v Plzni

Místo vydání

Plzeň

Místo konání akce

Plzeň

Datum konání akce

1. 1. 2011

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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