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Fluid–structure interaction analysis of 3‐D rectangular tanks by a variationally coupled BEM–FEM and comparison with test results
Author(s) -
Koh Hyun Moo,
Kim Jae Kwan,
Park JangHo
Publication year - 1998
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/(sici)1096-9845(199802)27:2<109::aid-eqe714>3.0.co;2-m
Subject(s) - slosh dynamics , finite element method , boundary element method , structural engineering , fluid–structure interaction , rigidity (electromagnetism) , earthquake shaking table , boundary value problem , hydroelasticity , engineering , storage tank , mechanics , mathematical analysis , mathematics , physics , mechanical engineering
A variationally coupled BEM–FEM is developed which can be used to analyse dynamic response, including free‐surface sloshing motion, of 3‐D rectangular liquid storage tanks subjected to horizontal ground excitation. The tank structure is modelled by the finite element method and the fluid region by the indirect boundary element method. By minimizing a single Lagrange function defined for the entire system, the governing equation with symmetric coefficient matrices is obtained. To verify the newly developed method, the analysis results are compared with the shaking‐table test data of a 3‐D rectangular tank model and with the solutions by the direct BEM–FEM. Analytical studies are conducted on the dynamic behaviour of 3‐D rectangular tanks using the method developed. In particular, the characteristics of the sloshing response, the effect of the rigidity of adjacent walls on the dynamic response of the tanks and the orthogonal effects are investigated. © 1998 John Wiley & Sons, Ltd.