Modelling and design of passive damping of turbine blade vibration

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F10%3A00503643" target="_blank" >RIV/49777513:23520/10:00503643 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Modelling and design of passive damping of turbine blade vibration

Popis výsledku v původním jazyce

This contribution is aimed at modelling of friction effects in blade shrouding which are realized by means of friction elements placed between blades. The modelling methodology can be divided into two steps. The first step is characterized by detailed modelling of two blades vibrations with small one friction body in between. Flexible blades fixed to the rotating disc are discretized by FEM using 1D Rayleigh beam elements derived in rotating space as well as the friction body modelled as rigid body. Thespatial contact and friction forces are derived using nonlinear contact theory and harmonic balance method. The second step is the modelling and analysis of a complex system composed of a flexible disk (or a general rotor) with mounted blades. The blades are considered as one dimensional continuum fixed with three-dimensional elastic disk centrally clamped into turbine rotor rotating with constant speed.

Název v anglickém jazyce

Modelling and design of passive damping of turbine blade vibration

Popis výsledku anglicky

This contribution is aimed at modelling of friction effects in blade shrouding which are realized by means of friction elements placed between blades. The modelling methodology can be divided into two steps. The first step is characterized by detailed modelling of two blades vibrations with small one friction body in between. Flexible blades fixed to the rotating disc are discretized by FEM using 1D Rayleigh beam elements derived in rotating space as well as the friction body modelled as rigid body. Thespatial contact and friction forces are derived using nonlinear contact theory and harmonic balance method. The second step is the modelling and analysis of a complex system composed of a flexible disk (or a general rotor) with mounted blades. The blades are considered as one dimensional continuum fixed with three-dimensional elastic disk centrally clamped into turbine rotor rotating with constant speed.

Druh

O - Ostatní výsledky

CEP obor

BI - Akustika a kmity

OECD FORD obor

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Projekt

<a href="/cs/project/GA101%2F09%2F1166" target="_blank" >GA101/09/1166: Výzkum dynamických vlastností a optimalizace složitých rotujících soustav s nelineárními vazbami a materiály o vysokém útlumu</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

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