【摘要】 以某高温气冷堆核电厂结构为原型,利用有限元软件建立三维结构实体模型,开展了模态分析和弹性动力时程分析的数值计算,以探讨某高温气冷堆核电厂的结构特性和抗震性能,并重点分析了在三向地震动作用下高温气冷堆核电厂的加速度、位移反应时程和楼层反应谱。总体上看,高温气冷堆核电厂在两个水平向的刚度比较均匀,楼层反应接近,布局较为合理;在三向地震动作用下,顶层中心点的竖向楼层反应均明显大于两水平方向楼层反应,因此在高温气冷堆核电厂结构设计中,应关注竖向地震动对核电厂地震反应带来的不利影响。更多还原

【Abstract】 In order to understand the structural characteristics and seismic performance of high temperature gas cooled reactor nuclear power plant, we established a three dimensional finite element model by using the finite element software, carried out the numerical calculation of modal frequency and dynamic elastic time history, and analyzed acceleration, displacement time history and floor response spectrum of nuclear power plant under three directions ground motion. Our results showed that:(1) The structure’s stiffness of two horizontal directions is uniformity, so the structure of nuclear power plant is reasonable;(2) The vertical floor response of the top center were much greater than the horizontal floor response under the three-dimensional earthquake’s loading. So we should pay more attentions to the disadvantageous influence of the nuclear power plant under the vertical seismic loading in the design.更多还原