Use of cyclic symmetry properties in vibration analysis of bladed disks with friction contacts between blades

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F14%3A43923936" target="_blank" >RIV/49777513:23640/14:43923936 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/47718684:_____/14:#0000570

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.proeng.2014.12.122" target="_blank" >http://dx.doi.org/10.1016/j.proeng.2014.12.122</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.proeng.2014.12.122" target="_blank" >10.1016/j.proeng.2014.12.122</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Use of cyclic symmetry properties in vibration analysis of bladed disks with friction contacts between blades

Popis výsledku v původním jazyce

The development of steam turbine's blades is closely related to the computer modelling of their vibrations. In this work, a numeric method that (i) implements the calculation of nonlinear vibrations (ii) makes use of the cyclic symmetry of the bladed disk and (iii) models structural contact elements between blades is presented. The cyclic symmetry properties of the bladed disk are used for the calculations of its natural frequencies and mode shapes, then, these are employed in the analysis of its nonlinear vibrations. The contact elements reinforce the bladed disk and act as friction dampers in case of its exceeding excitation. Contact areas between blades are modeled via coupling elements implementing dry Coulomb friction. The method is demonstrated on the particular case of the bladed disk equipped with the LSB48 blades and excited by travelling-wave of two nodal diameters. Finally, the accuracy of the mathematical model and the concept of a contact stiffness are discussed.

Název v anglickém jazyce

Use of cyclic symmetry properties in vibration analysis of bladed disks with friction contacts between blades

Popis výsledku anglicky

The development of steam turbine's blades is closely related to the computer modelling of their vibrations. In this work, a numeric method that (i) implements the calculation of nonlinear vibrations (ii) makes use of the cyclic symmetry of the bladed disk and (iii) models structural contact elements between blades is presented. The cyclic symmetry properties of the bladed disk are used for the calculations of its natural frequencies and mode shapes, then, these are employed in the analysis of its nonlinear vibrations. The contact elements reinforce the bladed disk and act as friction dampers in case of its exceeding excitation. Contact areas between blades are modeled via coupling elements implementing dry Coulomb friction. The method is demonstrated on the particular case of the bladed disk equipped with the LSB48 blades and excited by travelling-wave of two nodal diameters. Finally, the accuracy of the mathematical model and the concept of a contact stiffness are discussed.

Druh

D - Stať ve sborníku

CEP obor

JR - Ostatní strojírenství

OECD FORD obor

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Projekt

<a href="/cs/project/TE01020068" target="_blank" >TE01020068: Centrum výzkumu a experimentálního vývoje spolehlivé energetiky</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název statě ve sborníku

Procedia Engineering

ISBN

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ISSN

1877-7058

e-ISSN

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Počet stran výsledku

10

Strana od-do

500-509

Název nakladatele

Elsevier B.V.

Místo vydání

Amsterdam

Místo konání akce

Vysoké Tatry, Slovensko

Datum konání akce

25. 11. 2014

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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