考虑流固耦合效应的核电储液结构晃动特性与隔震特性研究

Research on the dynamic characteristics and isolation properties of nuclear power liquid storage structures considering fluid-structure interaction effects

泳池式反应堆是一种核能供热堆厂房结构,其中的堆水池是关键部位。在地震发生时,堆水池内的液体会与结构发生流固耦合效应,威胁到堆水池的完整性,因此需要进行抗震分析和隔震保护。首先,以某反应堆的堆水池为研究对象,在地面地震动水平双向输入条件下,对比分析了非隔震结构和隔震结构的动力响应;其次,使用位移、加速度、主应力、晃动波高和基底剪力指标分析隔震层对储液结构抗震性能的提升程度。研究结果表明:设置隔震层对加速度、位移、应力和基底剪力都有明显降幅,隔震效果明显,起到了良好的隔震效果;而对于晃动波高来说,隔震尚不能有效控制晃动波高,反而有一定的放大作用。研究成果可为核电储液结构的隔震设计提供参考。

The swimming pool-type reactor is a type of nuclear heating reactor facility,and the pool of the reactor is a critical component.During an earthquake,the liquid inside the pool undergoes fluid-structure interaction,posing a threat to the integrity of the pool.Therefore,seismic analysis and isolation protection are necessary.Firstly,the pool of a certain reactor is taken as the research object.Under the input of bidirectional ground motion during an earthquake,a comparative analysis of the dynamic responses of non-isolated and isolated structures is conducted.Then,displacement,acceleration,principal stress,wave height,and base shear indicators were then used to analyze the degree of improvement in the seismic performance of the liquid storage structure by the isolation layer.The results show that the addition of an isolation layer significantly reduces acceleration,displacement,stress,and base shear,indicating a significant isolation effect.However,for wave height,isolation is not yet effective in controlling it and may even have an amplification effect.The research findings can provide reference for the seismic isolation design of nuclear power liquid storage structures.