Title: Two-stage modelling of hexagonal fuel assemblies vibration considering mechanical nonlinearities
Authors: Zeman, Vladimír
Dyk, Štěpán
Hlaváč, Zdeněk
Citation: ZEMAN, V., DYK, Š., HLAVÁČ, Z. Two-stage modelling of hexagonal fuel assemblies vibration considering mechanical nonlinearities. Progress in nuclear energy, 2021, roč. 138, č. AUG 2021, s. 1-12. ISSN 0149-1970.
Issue Date: 2021
Publisher: Elsevier
Document type: článek
URI: 2-s2.0-85108059212
ISSN: 0149-1970
Keywords in different language: Nuclear reactor;Fuel assembly;Nonlinear vibration;Coolant pressure pulsations;Friction vibration
Abstract in different language: The paper presents a complex modelling concept for the nuclear fuel assembly vibration caused by the coolant pressure pulsations generated by the main circulation pumps. The method is based on the two-stage modelling with the reactor's global model at the first stage and the detailed model of the particular fuel assembly at the second stage. This approach allows respecting all the relevant mechanical nonlinearities - clearances and friction in the key-groove couplings between the reactor core barrel and the pressure vessel and the internal impact or the friction interaction of the fuel assemblies. Numerical simulations allow better interpretation of monitoring data concerning the fuel burn-up.
Rights: Plný text je přístupný v rámci univerzity přihlášeným uživatelům.
© Elsevier
Appears in Collections:Články / Articles (NTIS)
Články / Articles (KME)

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