Study of dry-friction damping effect on two simplified models of flutter oscillations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F19%3A00507377" target="_blank" >RIV/61388998:_____/19:00507377 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/978-3-030-20131-9_337" target="_blank" >http://dx.doi.org/10.1007/978-3-030-20131-9_337</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-3-030-20131-9_337" target="_blank" >10.1007/978-3-030-20131-9_337</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Study of dry-friction damping effect on two simplified models of flutter oscillations

Popis výsledku v původním jazyce

Dry-friction damping effect to reduction of self-excited vibrations due to aero-elastic instability is studied on numerical reduced model of rotating turbine wheel with 30 blades. The aerodynamic excitation arises from the spatially periodical flow of steam through the stator blades cascade. Dry friction contact damping is considered as one of the very effective methods for self-excited “flutter” vibrations. The study is oriented on the narrow frequency range and therefore the blades are modelled as systems with one degree of freedom (DOF). The selfexcited aero-elastic forces of blades are described by two different types of Van der Pol model. It is shown for both self-excitation models that the dry friction forces needed for suppression of dangerous flutter vibrations strongly depends on the complexity of modes and also on the mutual positions of excitation forces to damping elements.

Název v anglickém jazyce

Study of dry-friction damping effect on two simplified models of flutter oscillations

Popis výsledku anglicky

Dry-friction damping effect to reduction of self-excited vibrations due to aero-elastic instability is studied on numerical reduced model of rotating turbine wheel with 30 blades. The aerodynamic excitation arises from the spatially periodical flow of steam through the stator blades cascade. Dry friction contact damping is considered as one of the very effective methods for self-excited “flutter” vibrations. The study is oriented on the narrow frequency range and therefore the blades are modelled as systems with one degree of freedom (DOF). The selfexcited aero-elastic forces of blades are described by two different types of Van der Pol model. It is shown for both self-excitation models that the dry friction forces needed for suppression of dangerous flutter vibrations strongly depends on the complexity of modes and also on the mutual positions of excitation forces to damping elements.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20302 - Applied mechanics

Projekt

<a href="/cs/project/GC19-02288J" target="_blank" >GC19-02288J: Robustní metody redukce-řádu modelu pro úlohy interakce poddajných těles s tekutinou</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

Advances in Mechanism and Machine Science

ISBN

978-3-030-20130-2

ISSN

2211-0984

e-ISSN

2211-0992

Počet stran výsledku

10

Strana od-do

3419-3428

Název nakladatele

Springer Nature Switzerland

Místo vydání

Krakow

Místo konání akce

Krakow

Datum konání akce

30. 6. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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