摘要
地震作用下,AP1000的非能动安全壳冷却水贮存箱(PCCWST)的水与结构产生的流固耦合作用可能会对安全壳的完整性造成威胁。在AP1000屏蔽厂房的设计中,非规则形状的PCCWST被简化为圆柱体,采用Housner模型进行结构设计,但该简化对冲动质量的影响仍有待研究。本工作以PCCWST为原型,设计完全缩比试验模型和等体积缩比模型,分别进行了振动台模型试验,测量了水晃动频率、结构频率和阻尼比。通过实验数据反推出PCCWST内水的冲动质量和晃动频率等。最后针对AP1000混凝土安全壳建模,采用附加质量法考虑流固耦合效应,利用实体单元模拟水的冲动效应,进行了有限元建模以及模态分析和时程分析,并将结果与其他两种流体单元(Fluid30和Fluid80)的结果进行对比。本文的研究对PCCWST的设计和评审具有参考价值。
Under the earthquake,there will be fluid-structure interaction effect in the AP1000 passive containment cooling system water storage tank（PCCWST）.This will probably threat the integrity of the containment.The PCCWST was simplified into a cylindrical water tank and then designed by Housner＇s model.However,the effect of this simplification on impulsive mass remains to be studied.In this study,a fully scaled down PCCWST experiment model and a scale-down PCCWST experiment model with the same volume ratio were designed.Then the shaking table experiments were carried out on these experiment models by measuring the water sloshing frequency,structure＇snatural frequency and damping ratio.The impulsive mass and the convective frequency of water in PCCWST were evaluated by the experiment results.Finally,the finite element model of AP1000 concrete containment was built.The water was simulated by solid element by add mass method to simulate the convective effect caused by fluidstructure interaction.The modal analysis and transient analysis were conducted for the model.The results were compared with that using other fluid elements（Fluid30and Fluid80）.The study can provide helpful information on design and assessment of PCCWST.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2016年第6期1027-1033,共7页
Atomic Energy Science and Technology
基金
国家科技重大专项资助项目(2015ZX06004002-003)
