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Experimental Research and Numerical Analysis on Sloshing Dynamics of Irregular Annular Cylindrical Water Tank
This study focuses on the irregular annular cylindrical water tank of nuclear island building. Water tank is one important component of passive containment cooling system (PCS). The sloshing frequency of water is much less than the structure frequency and large-amplitude sloshing occurs easily subjected to seismic loadings. It is known that the floor response spectra may be changed because of the water tank and so do the seismic response of nuclear equipment. Therefore, the sloshing dynamics of water tank should be studied before the dynamic analysis of nuclear island building. A 1/16 scaled model was designed, and the shaking table test was done. The hydrodynamic pressure time histories and variation in wave height were recorded in the test. Then, the sloshing frequencies and damping ratio are recognized. Moreover, modal analysis and time history analysis of numerical model were done based on ADINA. By comparing the sloshing frequencies and hydrodynamic pressures, the reasonableness of test method and the accuracy of numerical results are verified, and it indicates that the formulation of potential-based fluid elements (PBFE) can be used to simulate fluid-structure interaction (FSI) of nuclear island building.


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