Computational Model for the Calculation of Natural Vibration Characteristics of a Turbine Bladed Disk

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47718684%3A_____%2F23%3A10001576" target="_blank" >RIV/47718684:_____/23:10001576 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/chapter/10.1007/978-3-031-45705-0_81" target="_blank" >https://link.springer.com/chapter/10.1007/978-3-031-45705-0_81</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Computational Model for the Calculation of Natural Vibration Characteristics of a Turbine Bladed Disk

Popis výsledku v původním jazyce

Bladed disks are structural components of various types of rotating machines. The presented computational method for calculating natural vibration characteristics is based on the cyclic symmetry of structures and is applied to the calculation of natural frequencies and mode shapes of the steam turbine bladed disk with the LSB 54&quot; blades. Blades of an advanced design are continuously coupled in the zone of a shroud and the tie-boss zone by the blades&apos; untwist caused by the action of centrifugal forces at the turbine rotation. The calculated value of the natural frequencies associated with the mode shapes with zero nodal diameters at turbine operational speed appears to be problematic compared to the measured ones. The originally created computational model of the bladed disk is suitable for the calculation of natural frequencies and mode shapes with arbitrary numbers of nodal diameters, zero nodal diameters apart. The paper deals with searching for the approach to the creation of a new model of the steam turbine bladed disk with blades with continuous binding that would improve the compliance of the natural frequencies associated with the mode shapes with zero nodal diameters with the measured ones.

Název v anglickém jazyce

Computational Model for the Calculation of Natural Vibration Characteristics of a Turbine Bladed Disk

Popis výsledku anglicky

Bladed disks are structural components of various types of rotating machines. The presented computational method for calculating natural vibration characteristics is based on the cyclic symmetry of structures and is applied to the calculation of natural frequencies and mode shapes of the steam turbine bladed disk with the LSB 54&quot; blades. Blades of an advanced design are continuously coupled in the zone of a shroud and the tie-boss zone by the blades&apos; untwist caused by the action of centrifugal forces at the turbine rotation. The calculated value of the natural frequencies associated with the mode shapes with zero nodal diameters at turbine operational speed appears to be problematic compared to the measured ones. The originally created computational model of the bladed disk is suitable for the calculation of natural frequencies and mode shapes with arbitrary numbers of nodal diameters, zero nodal diameters apart. The paper deals with searching for the approach to the creation of a new model of the steam turbine bladed disk with blades with continuous binding that would improve the compliance of the natural frequencies associated with the mode shapes with zero nodal diameters with the measured ones.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20302 - Applied mechanics

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

Mechanisms and Machine Science, Vol. 147

ISBN

978-3-031-45704-3

ISSN

2211-0984

e-ISSN

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Počet stran výsledku

11

Strana od-do

835-845

Název nakladatele

Springer Science and Business Media B.V.

Místo vydání

neuveden

Místo konání akce

Tokyo

Datum konání akce

5. 11. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000276388000134