A sloshing test of a cylindrical tank model with an eccentric core barrel was performed. Some characteristic sloshing modes appeared, which have not been observed in the case of a cylindrical tank with a concentric core barrel. FEM analysis results were also compared with the above test results. In the above test, the viscosity of liquid(water) was increased by adding high polymer to water. This method was found to be very useful in getting clear shape of linear sloshing modes during sinusoidal shaking tests.
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