| dc.contributor.author | Moreira, Miguel | |
| dc.contributor.author | Antunes, J. | |
| dc.date.accessioned | 2013-07-24T10:29:03Z | |
| dc.date.available | 2013-07-24T10:29:03Z | |
| dc.date.issued | 2004 | |
| dc.description.abstract | Fluid-coupling effects lead to a complex dynamical behavior of immersed spent fuel assembly storage racks. Predicting their responses under strong earthquakes is of prime importance for the safety of nuclear plant facilities. In the near-past we introduced a simplified linearized model for the vibrations of such systems, in which gap-averaged velocity and pressure fields were described analytically in terms of a single space-coordinate for each fluid inter-rack channel. Using such approach it was possible to generate and assemble a complete set of differentialalgebraic equations describing the multi-rack fluid coupled system dynamics. Because of the linearization assumptions, we achieved computation of the flowstructure coupled modes, but also time-domain simulations of the system responses. However, nonlinear squeeze-film and dissipative flow effects, connected with very large amplitude responses and/or relatively small water gaps, cannot be properly accounted unless the linearization assumption is relaxed. Such was the aim of a previous paper. Here, our nonlinear model is introduced and tested in order to expose the significance of the squeeze-film and dissipative effects. The response of a fuel storage pool with several racks submitted to strong seismic excitations applied in different directions are also presented and discussed. | por |
| dc.identifier.citation | M. Moreira, J. Antunes, "Nonlinear Flow effects on Immersed Spent Nuclear Racks", in B.H.V. Topping, C.A. Mota Soares, (Editors), "Proceedings of the Seventh International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 88, 2004. doi:10.4203/ccp.79.88 | por |
| dc.identifier.uri | http://hdl.handle.net/10400.26/4579 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | Civil-Comp Press | por |
| dc.relation.publisherversion | DOI:10.4203/ccp.79.88 | por |
| dc.subject | Fluid-structure interaction | por |
| dc.subject | Nonlinear flow effects | por |
| dc.subject | Squeeze-film | por |
| dc.subject | Spent fuel storage racks | por |
| dc.subject | Seismic response | por |
| dc.subject | Differential-algebraic equations | por |
| dc.title | Nonlinear flow effects on immersed spent nuclear racks | por |
| dc.type | preprint | |
| dspace.entity.type | Publication | |
| oaire.citation.conferencePlace | Lisbon | por |
| oaire.citation.title | Proceedings of the Seventh International Conference on Computational Structures Technology | por |
| oaire.citation.volume | Paper 88 | por |
| rcaap.rights | openAccess | por |
| rcaap.type | preprint | por |
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