Vibration of Imperfect Rotating Disk

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F09%3A00332020" target="_blank" >RIV/61388998:_____/09:00332020 - 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

Vibration of Imperfect Rotating Disk

Popis výsledku v původním jazyce

Paper is concerned with the flexural vibrations of bladed disk by theoretical and numerical solutions. The main aim of this study is to elaborate basic background for diagnostic and identification methods for ascertaining main properties of real structure or of experimental model of turbine disks. The reduction of undesirable vibrations of blades is proposed by using damping heads, which on the experimental model of turbine disk are applied only on a limited number of blades. This partial setting of damping heads introduces imperfection in mass, stiffness and damping distribution on the periphery and lead to the more complicated dynamic properties than those of perfect disk. Calculation of FEM model and analytic ? numerical solution of disk behaviour in the limited ? two modes frequency range show splitting of resonance with increasing speed of disk rotation. Spectrum of resonance is twice denser than at perfect disk.

Název v anglickém jazyce

Vibration of Imperfect Rotating Disk

Popis výsledku anglicky

Paper is concerned with the flexural vibrations of bladed disk by theoretical and numerical solutions. The main aim of this study is to elaborate basic background for diagnostic and identification methods for ascertaining main properties of real structure or of experimental model of turbine disks. The reduction of undesirable vibrations of blades is proposed by using damping heads, which on the experimental model of turbine disk are applied only on a limited number of blades. This partial setting of damping heads introduces imperfection in mass, stiffness and damping distribution on the periphery and lead to the more complicated dynamic properties than those of perfect disk. Calculation of FEM model and analytic ? numerical solution of disk behaviour in the limited ? two modes frequency range show splitting of resonance with increasing speed of disk rotation. Spectrum of resonance is twice denser than at perfect disk.

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

2009

Kód důvěrnosti údajů

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