摘要
燃料组件压紧板弹簧的刚度设计对其安全服役起着至关重要的作用。通过引入INCONEL 718合金的Johnson-Cook非线性本构关系,拟合了不同中子辐照剂量下INCONEL 718合金的Johnson-Cook非线性本构模型;建立了压紧板弹簧系统的有限元模型,开展了不同因素对压紧板弹簧刚度特性的影响研究。结果表明:温度、加载次数、幅值的增大会导致压紧板弹簧在循环加载下出现不同程度的软化,而加载速率的增大会使压紧板弹簧的刚度出现硬化。本文研究可为燃料组件中的压紧板弹簧刚度设计提供参考。
The stiffness design of hold-down spring in fuel assembly plays an important role in its safe service.By introducing the Johnson-Cook nonlinear constitutive relation of INCONEL 718 Alloy,the Johnson-Cook nonlinear constitutive model of INCONEL 718 Alloy under different neutron irradiation doses is fitted;the finite element model of the hold-down spring system is established,and the influence of different factors on the stiffness characteristics of the hold-down spring is studied.The results show that the increase of temperature,loading times and amplitude lead to different degrees of softening of the hold-down spring under cyclic loading,while the increase of the loading rate makes the stiffness of the hold-down spring harden.The study in this paper can provide a reference for the stiffness design of the hold-down spring in the fuel assembly.
作者
杨泞瑞
吴兴文
梁树林
秦勉
朱发文
王浩煜
刘孟龙
Yang Ningrui;Wu Xingwen;Liang Shulin;Qin Mian;Zhu Fawen;Wang Haoyu;Liu Menglong(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu,610031,China;School of Mechanical Engineering,Southwest Jiaotong University,Chengdu,610031,China;Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,China)
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2022年第4期91-98,共8页
Nuclear Power Engineering
基金
国家重点研发项目(2018YFE0201401-01)
中国科协青年托举工程项目(2019QNRC001)
四川省科技计划项目(2020YJ0075)。
