In a fast spectrum reactor, the fuel rod bundle is mainly positioned radially by the wire which can make contact with the adjacent fuel rods, and then it is inevitable that flow-induced vibration (FIV) will cause fretting wear and vibration fatigue of the fuel cladding at the contact position. Therefore, the computational model of fretting wear and fatigue life about the fuel rod bundle caused by FIV will be studied in this paper. Based on the random vibration model of the fuel rod bundle, Hertz contact theory, and Archard wear theory, the fretting wear life computational model and the fatigue life computational model of the wire-to-adjacent fuel rod (WAFR) contact have been established. Finally, taking CEFR design parameters as an example, the fretting wear life and vibration fatigue life of the cladding are calculated, and it is found that fatigue affects the service life of the fuel rod more seriously than fretting wear. The calculation model and method lay a foundation for further accurate prediction and analysis of the fuel rod life.

中文翻译：

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CEFR中受湍流轴流影响的燃料束微动磨损和疲劳寿命分析

在快速光谱反应堆中，燃料棒束主要通过金属丝径向定位，该金属丝可以与相邻的燃料棒接触，因此不可避免的是，流致振动（FIV）将导致燃料的微动磨损和振动疲劳。在接触位置进行熔覆。因此，本文将研究FIV引起的燃料棒束微动磨损和疲劳寿命的计算模型。基于燃料棒束的随机振动模型，赫兹接触理论和阿卡德磨损理论，建立了线与相邻燃料棒（WAFR）接触件的微动磨损寿命计算模型和疲劳寿命计算模型。最后以CEFR设计参数为例，计算了包层的微动磨损寿命和振动疲劳寿命，结果发现，疲劳强度比微动磨损更严重地影响着燃料棒的使用寿命。该计算模型和方法为进一步准确预测和分析燃油杆寿命奠定了基础。