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基于ANSYS和Midas Gen软件建立AP1000核岛结构有限元模型,通过非线性时程分析方法模拟核岛结构的三维地震响应,对核岛结构在安全停堆地震作用下的响应规律及隔震控制进行研究。选取隔震周期、刚度比和屈重比为控制参数,分析不同隔震层参数对核岛结构地震响应的影响。研究表明:引入基础隔震技术,能有效降低核岛结构的地震响应;核岛结构随隔震周期的延长,顶点水平加速度和隔震层剪力均呈现明显减小趋势,屈重比和屈服前后刚度比随隔震周期的延长,对隔震核岛结构的地震响应影响越小。
Based on ANSYS and Midas Gen software, the finite element model of the nuclear island structure of AP1000 was established. The nonlinear seismic response was simulated by nonlinear time history method. The response of nuclear island structure under safe shutdown and the isolation control the study. Seismic isolation ratio, stiffness ratio and flexural weight ratio are taken as control parameters to analyze the effect of different isolation layer parameters on the seismic response of nuclear island structure. The research shows that the introduction of base isolation technology can effectively reduce the seismic response of the nuclear island structure. With the extension of the isolation period, the horizontal acceleration of the core island and the shear of the isolation layer all show a decreasing trend, and the ratio of yield to yield The stiffness ratio before and after the earthquake with the shock cycle, the impact on the seismic response of isolated nuclear island structure, the smaller.