{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,9,4]],"date-time":"2024-09-04T00:52:33Z","timestamp":1725411153041},"reference-count":0,"publisher":"ASMEDC","content-domain":{"domain":["asmedigitalcollection.asme.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2004,1,1]]},"abstract":"<jats:p>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 differential-algebraic equations describing the multi-rack fluid coupled system dynamics. Because of the linearization assumptions, we achieved computation of the flow-structure 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 is the aim of the present paper. Here, using a similar approach, we generalize our theoretical model to deal with nonlinear flow effects. Besides that the proposed methodology can be automatically implemented in a symbolic computational environment, it is much less computer-intensive than finite element formulations. Using the proposed technique, computations of basic flow-coupled rack configurations subjected to impulse excitations are presented, in order to highlight the essential features of such systems as well as the relevance of squeeze-film and dissipative effects. Finally, more realistic simulations of complex system responses to strong seismic excitations are presented and discussed.<\/jats:p>","DOI":"10.1115\/imece2004-62353","type":"proceedings-article","created":{"date-parts":[[2008,4,2]],"date-time":"2008-04-02T20:36:45Z","timestamp":1207168605000},"page":"651-662","update-policy":"http:\/\/dx.doi.org\/10.1115\/crossmarkpolicy-asme","source":"Crossref","is-referenced-by-count":1,"title":["Fluid-Coupled Vibrations of Immersed Spent Nuclear Racks: A Nonlinear Model Accounting for Squeeze-Film and Dissipative Phenomena"],"prefix":"10.1115","author":[{"given":"Miguel","family":"Moreira","sequence":"first","affiliation":[{"name":"Setu\u00b4bal Polytechnic, College of Technology"}]},{"given":"Jose\u00b4","family":"Antunes","sequence":"additional","affiliation":[{"name":"Institute of Nuclear Technology"}]}],"member":"33","published-online":{"date-parts":[[2008,3,24]]},"event":{"name":"ASME 2004 International Mechanical Engineering Congress and Exposition","start":{"date-parts":[[2004,11,13]]},"sponsor":["Design Engineering Division"],"location":"Anaheim, California, USA","end":{"date-parts":[[2004,11,19]]},"acronym":"IMECE2004"},"container-title":["Design Engineering"],"original-title":[],"link":[{"URL":"http:\/\/asmedigitalcollection.asme.org\/IMECE\/proceedings-pdf\/doi\/10.1115\/IMECE2004-62353\/2619090\/651_1.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"http:\/\/asmedigitalcollection.asme.org\/IMECE\/proceedings-pdf\/doi\/10.1115\/IMECE2004-62353\/2619090\/651_1.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2020,1,10]],"date-time":"2020-01-10T20:23:45Z","timestamp":1578687825000},"score":1,"resource":{"primary":{"URL":"https:\/\/asmedigitalcollection.asme.org\/IMECE\/proceedings\/IMECE2004\/47055\/651\/309006"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2004,1,1]]},"references-count":0,"URL":"https:\/\/doi.org\/10.1115\/imece2004-62353","relation":{},"subject":[],"published":{"date-parts":[[2004,1,1]]}}}