Nonlinear vibration analysis of steam turbine rotating wheel equipped with the LSB48 blades

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F15%3A43932373" target="_blank" >RIV/49777513:23520/15:43932373 - isvavai.cz</a>
Alternative codes found
RIV/49777513:23640/15:43932373
Result on the web
<a href="http://dx.doi.org/10.6567/IFToMM.14TH.WC.OS4.007" target="_blank" >http://dx.doi.org/10.6567/IFToMM.14TH.WC.OS4.007</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.6567/IFToMM.14TH.WC.OS4.007" target="_blank" >10.6567/IFToMM.14TH.WC.OS4.007</a>

Result language
angličtina
Original language name
Nonlinear vibration analysis of steam turbine rotating wheel equipped with the LSB48 blades
Original language description
Currently, long blades of rotating wheels of steam turbines’ low-pressure stages comprise integral structural contact elements. The contact elements reinforce the bladed disk, which leads to re-tuning its natural frequencies. But they also act as friction dampers in the case of higher vibrations caused by undesirable excitation sources. The development of the long steam turbine blades is closely related to the computer modelling of the above-mentioned vibrations. In this work, two cases of excitation of nonlinear vibrations of the bladed disk equipped with the LSB48 blades are investigated: (i) travelling-wave excitation with two nodal diameters and (ii) the excitation by earthquake forces in horizontal direction of the rotation axis. The cyclic symmetry properties of the bladed disk are used for the calculations. Contact areas between blades are modelled using coupling elements implementing dry Coulomb friction. Finally, the accuracy of the mathematical model and the concept of the contact stiffness are discussed.
Czech name
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Czech description
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Project
<a href="/en/project/TE01020068" target="_blank" >TE01020068: Centre of research and experimental development of reliable energy production</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
The 14th IFToMM World Congress, Taipei, Taiwan, October 25-30, 2015
ISBN
978-986-04-6098-8
ISSN
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e-ISSN
neuvedeno
Number of pages
8
Pages from-to
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Publisher name
International Federation for the Promotion of Mechanism and Machine Science
Place of publication
Taipei
Event location
Taipei, Taiwan
Event date
Oct 25, 2015
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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