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| Simplified method for simulating the FSI effect of PCS water tank in a nuclear island building |
| LI Xiaojun1,2,SONG Chenning3,ZHOU Guoliang4,WEI Chao4 |
1.College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China;
2.Institute of Geophysics,China Earthquake Administration,Beijing 100081,China；
3.School of Civil Engineering,Shandong Jianzhu University,Ji’nan 250101,China;
4.Nuclear and Radiation Safety Center,Ministry of Environmental Protection,Beijing 100082,China |
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Abstract High cooling water tank is an important component of the passive containment cooling system (PCS) in a nuclear island building,and the fluid-structure interaction (FSI) between cooling water and shield building should be considered in dynamic analysis.The FSI effect is complex and it will take a long computing time in numerical analysis,a simplified method needs to be explored to improve the calculation efficiency under the condition of satisfying a certain computing accuracy.Based on the Housner model,a simplified liquid-tank interaction model was proposed,which could be used in the dynamic analysis of PCS water tank.Three-dimensional seismic response analyses on the FSI model and simplified model were done for some nuclear island building by using ADINA software.The peak accelerations,acceleration spectra of floor responses and effective stresses by the FSI model and simplified model were compared and the relative errors were analyzed.The results show that the proposed simplified liquid-tank interaction model is suitable for the dynamic analysis of nuclear island buildings with high cooling water tank under three-dimensional earthquake actions,and good results of the simulation of FSI effect can be achieved.
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Received: 12 September 2017
Published: 15 January 2019
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