疲劳强度减弱系数与应力集中系数在螺纹疲劳分析中的应用研究  

Study on Application of Fatigue Strength Reduction Factor and Stress Concentration Factor in Fatigue Analysis of Screw Threads

作　　者：陈涛 刘攀 徐晓 Chen Tao;Liu Pan;Xu Xiao(State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment, Shenzhen, Guangdong, 518172, China;China Nuclear Power Design Co. Ltd., Shenzhen, Guangdong, 518172, China)

机构地区：[1]核电安全监控技术与装备国家重点实验室,广东深圳518172 [2]深圳中广核工程设计有限公司,广东深圳518172

出　　处：《核动力工程》2018年第3期62-66,共5页Nuclear Power Engineering

摘　　要：以反应堆压力容器(RPV)为例,给出主螺栓螺纹的疲劳强度减弱系数(K_f)与应力集中系数(K_t)之间的理论关系、K_f与K_t的合理取值范围、工程上的等效判定方法以及在疲劳分析中的使用方法,并采用特定K_f值给出疲劳分析算例。明确了两者的概念及区别,在高强度钢材料螺纹结构的应用方面给出意见及范例,可为工程上螺栓选取及结构设计提供借鉴。Taking the reactor pressure vessel as an example, the theoretical relationship of fatigue strength reduction factor（Kf） and stress concentration factor（ Kt）, the reasonable values of Kf and Kt, the principles of equivalency of Kf and Kt in engineering project and the methods and techniques of how to use Kf and Kt in fatigue analysis are presented. An example of fatigue analysis for screw threads of reactor pressure vessel（RPV） stud with certain Kf is given. Consequently, definitions and differences of Kf and Kt are classified. Opinions on the application of Kf to high strength alloy stud are given, which can be used as a reference to the stud selection and the structure design in the engineering application.

关 键 词：疲劳分析 疲劳强度减弱系数(Kf) 应力集中系数(Kt) 反应堆压力容器(RPV) 

分 类 号：TL351.6[核科学技术—核技术及应用]