Preliminary Analysis of Flow Induced Vibration for AP1000 Secondary Core Support Assembly
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摘要: 运用有限元法建立AP1000堆内构件二次堆芯支承组件的计算模型,进行二次堆芯支承组件的模态分析和未考虑流量分配裙作用的流致振动分析。AP1000二次堆芯支承组件的动态特性和秦山修复后防断支承组件相比,AP1000结构的频率略低于秦山反应堆的修复后结构,而模态振型完全相同。频率降低是AP1000结构相对秦山反应堆修复后结构刚度、质量减小的综合效果。另外,本文探索了考虑结构流-固耦合效应的流致振动分析方法,提出了结构完全建模、简化板结构、单梁模型3种考虑流固耦合的流致振动分析方案。Abstract: The secondary core support assembly of Advanced Power Plant（AP1000） is modeled using the finite element methods（FEA）.Modal analysis and flow induced vibration（FIV） analysis without flow skirt for secondary core support assembly are performed.The natural frequency of AP1000 secondary core support assembly is smaller than that for Qinshan Phase I NPP with the same modal shape,which is produced by the combined effect of smaller stiffness and weight.Furthermore,the method of FIV analysis with fluid-structure coupling effect is studied.Three schemes that are full model,simplified shell model and single beam model for FIV analysis with fluid-structure coupling effect are proposed.
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