Response of a Vessel of LMFBR Subjected to Horizontal Excitations

Coupled liquid-structure oscillations of a container of pool-type LMFBR (liquid metal fast breeder reactor) subjected to horizontal excitations are studies for small motions. First, a variational principle is introduced for a perfect fluid and a linear elastic solid. Ignoring pumps and IHX's (i...

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Bibliographic Details
Published inTransactions of the Japan Society of Mechanical Engineers Series C Vol. 55; no. 516; pp. 1890 - 1896
Main Author KONDO, Hisao
Format Journal Article
LanguageJapanese
Published The Japan Society of Mechanical Engineers 25.08.1989
Subjects
FEM,BEM,Free Vibration,Response,Reactor Vessel
Variational Principle
Vibration Liquid-strucre Interaction
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Summary:Coupled liquid-structure oscillations of a container of pool-type LMFBR (liquid metal fast breeder reactor) subjected to horizontal excitations are studies for small motions. First, a variational principle is introduced for a perfect fluid and a linear elastic solid. Ignoring pumps and IHX's (intermediate heat exchangers), the container is treated as an axisymmetric structure containing liquid sodium considered as a perfect fluid. Discretized equations of motion are derived from the variational principle, using FEM for axisymmetric shell and BEM for liquid sodium. Free vibration analysis is worked to obtain natural frequencies and modes. Then, a modal analysis method is applied to give time history of the liquid-structure system subject to horizontal excitations resonant to the first bulging mode. Characteristic features of resonance are observed in deformations of an inner oblique wall.
ISSN:0387-5024
1884-8354
DOI:10.1299/kikaic.55.1890