基于数据驱动的管束结构流固耦合动力学建模  

Fluid-structure Interaction Dynamic Modeling of Tube Bundle Based on Data-driven

作　　者：冯志鹏[1] 蔡逢春[1] 张毅雄[1] 江小州 刘帅 Feng Zhipeng;Cai Fengchun;Zhang Yixiong;Jiang Xiaozhou;Liu Shuai(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,China)

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610213

出　　处：《核动力工程》2024年第S01期26-31,共6页Nuclear Power Engineering

基　　金：四川省自然科学基金(2022NSFSC1182)。

摘　　要：传热管束是压水堆蒸汽发生器的核心部件,容易发生流致振动问题。在流致振动机理中,漩涡脱落和流弹失稳是典型的强流固耦合问题,无法将结构场与流场解耦求解。为更好地完成蒸汽发生器中管束结构的力学设计,本文通过数据驱动的方式,完成了漩涡脱落和流弹失稳2种流致振动机理的流固耦合动力学建模,并用现有试验数据进行验证,预测结果与试验符合较好。本文方法结合了理论模型的严谨性和计算流体动力学(CFD)计算可考虑实际结构动力学特征的优点,既避免了复杂管束三维流固耦合模拟对海量计算资源的需求,又降低了传统理论模型对于试验数据的依赖,有利于在工程中推广应用。The tube bundle is the core component in the pressurized water reactor steam generator,which is prone to flow-induced vibration.In the mechanism of flow-induced vibration,vortex shedding and fluidelastic instability are typical strong fluid-structure interaction problems,which cannot be solved by decoupling the structural field and flow field.In order to better carry out the mechanical design of tube bundle in steam generator,the present work completed the fluid-structure interaction dynamic modeling of two flow-induced vibration mechanisms,vortex shedding and fluidelastic instability,using data-driven method.The prediction results were verified with existing experimental data,and they were in good agreement with the literature results.This method combines the advantages of the theoretical models and the consideration of actual structural dynamics characteristics in CFD calculations.It not only avoids the need for massive computing resources of three-dimensional fluid-structure interaction simulation in complex tube bundle,but also reduces the dependence of traditional theoretical models on experimental data,which is conducive to promoting application in engineering.

关 键 词：数据驱动 流固耦合 管束 动力学建模 

分 类 号：O322[理学—一般力学与力学基础] TL352[理学—力学]