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工程力学  2014 

某核电站安全壳1∶15模型振动台试验

Keywords: 安全壳,1∶,15模型,抗震性能,振动台试验,极限安全地震SL-2

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Abstract:

安全壳是核电站最后一道安全屏障,其抗震性能受到高度重视。该文根据某核电站安全壳原型结构,依据相似理论并采取一些简化措施,设计了一个相似比为1∶15欠配重的安全壳模型。试验选取ElCentro波、Taft波和人工波作为地震动输入。为验证原型安全壳在峰值加速度为0.25g极限安全地震SL-2水平下的抗震安全,进行了峰值加速度分别为0.1g、0.2g和0.3g(相当于原型结构0.088g、0.175g和0.263g)三组工况试验,并且在每组工况前对安全壳模型进行白噪声扫频测试。通过安全壳模型上布置的加速度传感器、位移计和应变片,得到了安全壳模型在三个工况下的动力响应。最后对试验数据进行了分析处理,试验结果表明原型安全壳结构在SL-2水平地震动下仍可保持为线弹性状态,具有充足抗震安全裕量。

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