摘要
针对偏心载荷下含裂纹反应堆支承结构的安全性评定和剩余承载力评估问题,本文开展了支承结构材料断裂力学性能试验。结合数值模拟和双参数失效评定法,探讨了不同裂纹长度和载荷偏心度对支承结构承载能力的影响。结果表明:裂纹长度和载荷偏心度对支承结构的剩余承载力均有显著影响,在进行含裂纹支承结构完整性评定时要考虑载荷的偏心特点,但不同裂纹长度下的双参数失效评定曲线有较为明显的区别,不同载荷偏心度下的评定曲线差别不大;轴向拉伸载荷下的剩余承载力与裂纹长度近似为线性相关,偏心拉伸载荷下具有一定非线性特征。研究成果为核动力系统生命力评估提供方法和数据库。
For the safety evaluation and estimation of the residual bearing capacity of a cracked reactor support structure under eccentric loadings,a test was conducted on the mechanical properties of the fracture of support structure materials.Combining numerical simulation and a two-parameter failure assessment diagram(FAD)method,the influences of different crack lengths and load eccentricities on the residual bearing capacity of support structures are discussed.The results show that both crack length and load eccentricity have significant effects on the residual bearing capacity of support structures and that the eccentricity of loads should be considered when evaluating the integrity of support structures with cracks.However,the two-parameter FAD curves of the support structure with different crack lengths had obvious differences,whereas the FAD curves under different load eccentricities had little difference.The residual bearing capacity was approximately linearly related to the crack length under axial tensile load,whereas it was nonlinear under eccentric tensile load.This work can provide a method and database for the vitality assessment of nuclear power systems.
作者
刘志伟
汪帅争
杨博
杨文平
齐辉
LIU Zhiwei;WANG Shuaizheng;YANG Bo;YANG Wenping;QI Hui(College of Aerospace and Civil Engineering,Harbin Engineering University,Harbin 150001,China;Nuclear Power Institute of China,Chengdu 610000,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2024年第8期1508-1513,共6页
Journal of Harbin Engineering University
基金
中核集团领创科研项目(G4821023)
中央高校基本科研业务费专项资金项目(XK2020021023).
关键词
含裂纹结构
剩余承载力
反应堆支承结构
偏心载荷
J积分
断裂韧性
失效评定图
cracked structure
residual bearing capacity
reactor support structure
eccentric load
J integral
fracture toughness
failure assessment diagram
