文献类型：期刊文献

中文题名：反应堆压力容器封头穿孔韧带区应力强度因子计算方法研究

英文题名：Calculation of Stress Intensity Factor Method in the Ligament of Perforated Head of Reactor Pressure Vessel

作者：曾鑫[1];刘方威[1];谈建平[1];刘长军[1];刘攀[2];王大胜[2];李越[1];张瑞凯[1];王龙[2]

机构：[1]华东理工大学机械与动力工程学院承压系统与安全教育部重点实验室,上海200237;[2]中广核工程有限公司核电安全技术与装备全国重点实验室,广东深圳518172

年份：2026

卷号：46

期号：2

起止页码：265

中文期刊名：核科学与工程

外文期刊名：Nuclear Science and Engineering

收录：;北大核心:【北大核心2023】；

基金：国家自然科学基金资助项目(No.12572088,No.52075174)。

语种：中文

中文关键词：应力强度因子;影响函数法;穿孔韧带区;反应堆压力容器;有限元

外文关键词：Stress intensity factor;Influence function method;Perforated head;Reactor pressure vessel;Finite element

摘要：反应堆压力容器封头穿孔韧带区由于结构和载荷的复杂性,易产生缺陷。为保证反应堆压力容器在寿期内的结构完整性,需对含缺陷部位进行安全评价,其中应力强度因子是评价所需的关键参数。因此,以反应堆压力容器封头穿孔韧带区为研究对象,利用有限元方法分别计算了压力载荷和温度载荷作用下不同尺寸半圆形裂纹的应力强度因子,并与Chapuliot提出的影响函数法进行了对比分析。结果表明:当裂纹深度较小时,Chapuliot方法可以保守地用于应力强度因子的计算;随着裂纹深度大于0.2倍壁厚,Chapuliot方法不再适用。为得到较准确的穿孔韧带区裂纹应力强度因子的工程计算方法,基于有限元解和RSE-M标准中的影响函数法,分别拟合出了压力载荷和温度载荷作用下穿孔韧带区不同尺寸半圆形裂纹中心点和表面点的影响系数。
The ligament of perforated head of reactor pressure vessel head is prone to defects due to the complexity of its structure and load.In order to ensure the structural integrity of reactor pressure vessel during its service life,safety evaluation of defective parts needs to be carried out,in which the stress intensity factor is a key parameter required for evaluation.The finite element method was adopted to calculate the stress intensity factors of semi-circular cracks in the ligament of perforated head of reactor pressure vessel under pressure loading and thermal loading,respectively.The finite element results were compared with the influence function method proposed by Chapuliot.The results show that if the crack depths are small,the Chapuliot method can be conservatively used to calculate stress intensity factors.As the crack depths are larger than 0.2 times of head thickness,the Chapuliot method is no longer suitable.In order to obtain a more accurate engineering calculation method for the stress intensity factors of cracks in the ligament of perforated head,based on the finite element solutions and the influence function method in the RSE-M standard,the influence coefficients of the central points and the surface points of the semi-circular cracks with different sizes are fitted under pressure loading and thermal loading.