Share:


Sensitivity of dynamic behaviour of the FE model: Case study for the ignalina NPP reactor building

    Romualdas Baušys Affiliation
    ; Gintautas Dundulis Affiliation
    ; Rimantas Kačianauskas Affiliation
    ; Darius Markauskas Affiliation
    ; Sigitas Rimkevičius Affiliation
    ; Eugeniuš Stupak Affiliation
    ; Stanislav Stupak Affiliation
    ; Saulius Šliaupa Affiliation

Abstract

The 3D thin‐walled finite element model of Ignalina NPP Unit 2 reactor building was developed aimed at the evaluation of the global dynamic behaviour with a focus on the seismic response. The model comprises description of the monolithic structures, while prefabricated frame structures are ignored and replaced by external masses. Sensitivity study of the selected dynamic characteristics of the model with respect to data uncertainties is considered. Uncertainty of the model is considered in terms of masses of removed structures and wall stiffness. Seismic input is represented by the site specific free‐field ground response acceleration spectra. The sensitivity study concerns variations of frequencies and acceleration of in‐structure horizontal response spectra at specified points. Maximal bending moments are also considered. It was obtained that the reactor level is not sensitive to the uncertainties considered, while discernable sensitivity was detected at the top level of the structure.


Santrauka


Pateikta Ignalinos atominės elektrinės pastato erdvinio baigtinių elementų dinaminio modelio kūrimo koncepcija, išnagrinėtas šio modelio jautrumas keičiamoms masėms ir sienų standumui. Parodyta, kaip šie keičiami dydžiai turi įtaką dažniams, horizontaliems tam tikrų nagrinėjamų taškų atsako spektrams, lenkimo momentų persiskirstymui ir jų didžiui.


First Published Online: 14 Oct 2010


Reikšminiai žodžiai: Ignalinos AE, baigtinių elementų modelis, savųjų dažnių ir seisminė analizė, plyno lauko spektras, atsako spektras.

Keyword : Ignalina nuclear power plant, finite element model, frequency analysis, seismic analysis, free-field spectra, instructure response spectra

How to Cite
Baušys, R., Dundulis, G., Kačianauskas, R., Markauskas, D., Rimkevičius, S., Stupak, E., Stupak, S., & Šliaupa, S. (2008). Sensitivity of dynamic behaviour of the FE model: Case study for the ignalina NPP reactor building. Journal of Civil Engineering and Management, 14(2), 121-129. https://doi.org/10.3846/1392-3730.2008.14.7
Published in Issue
Jun 30, 2008
Abstract Views
368
PDF Downloads
172