摘要
微动是蒸汽发生器传热管失效的一个主要原因,揭示传热管用690合金的微动疲劳十分重要。本文通过有限元模型和自编程序计算分析了690合金与抗震条间平-平面接触副微动疲劳裂纹萌生寿命,重点研究了侧压对微动疲劳寿命的影响。结果表明,侧压下的裂纹萌生寿命远低于其标准疲劳寿命,降低程度与微动接触状态和微动磨损均有关。在此基础上提出了一个考虑侧压影响的微动疲劳寿命估算公式。该经验公式具有较简单的解析表达式,且对疲劳寿命的计算较为保守,可方便地用于工程设计和寿命预估。
Fretting is one of the main causes of failure of heat-transfer tubes in steam generators.It is important to understand the fretting fatigue of heat transfer tubes made of 690 alloy.By combining the finite element model and the self-compiled program,the fretting fatigue crack initiation life of 690 alloy in contact with the anti-vibration bar was analyzed to find the effect of contact pressure.The results show that the crack initiation life under contact pressure is much lower than plain fatigue life.The life reduction is related to fretting contact status and fretting wear.An empirical formula with simple analytical expression was proposed to estimate the fretting fatigue life considering con-tact pressure.The empirical formula predicts a relatively conservative estimation for the fatigue life of 690 alloy and can be conveniently implemented in design and life prediction.
作者
赵杰江
唐力晨
钱浩
谢永诚
丁淑蓉
霍永忠
ZHAO Jiejiang1,TANG Lichen2,QIAN Hao2,XIE Yongcheng2,DING Shurong1,HUO Yongzhong 1(1. Department of Aeronautics and Astronautics, Institute of Mechanics and Computational Engineering, Fudan University, Shanghai 200433, China, 2. Shanghai Nuclear Engineering Research ＆ Design Institute Co., Ltd., Shanghai 200233, Chin)
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2018年第6期1070-1076,共7页
Atomic Energy Science and Technology
基金
国家科技重大专项资助项目(2016YFB0700103
2017ZX06002006)
国家自然科学基金资助项目(11572091)
