【摘要】 高温气冷堆的堆芯结构材料主要为石墨砖,在地震载荷下的动力学响应比较复杂。基于山东荣成石岛湾200 MW高温气冷堆示范核电站(HTR-PM)的设计,建立石墨砖单柱模型进行不同工况的振动台试验。通过白噪声、正弦波和人工地震波进行动态特性探查试验和功能验证试验,获得结构的自振频率、阻尼、加速度和位移响应等参数。结果表明,石墨砖单柱的非线性特征明显,自由状态下结构的一阶自振频率在1~5 Hz之间。石墨砖间的相对位移小于5 mm,满足设计准则要求。更多还原

【Abstract】 Consisting of graphite bricks mainly,the HTR core structure exhibits a complex dynamic behavior in the seismic load.Graphite single column model is set up based on the design of the HTR-PM to conduct the shake table tests in different boundary conditions.White noise wave and swept sine wave are used for the dynamic characteristic exploration tests and artificial seismic wave for functional verification tests.The acceleration data of the model is obtained.Further,the first natural frequency,damping coefficient,acceleration amplification factors and displacements are obtained on the basis of acceleration analysis.The result shows that the graphite single column model is with an obvious non-line performance.In a free state,its first natural frequency is between 1 and 5 Hz.The relative displacements between most adjacent bricks are below 5 mm,which meets the requirements.更多还原