世界核电设备与结构将长期面临的一个问题——微动损伤

Fretting Damage,One of World Wide Difficulties in the Field of Nuclear Power Equipment and Structures for a Long Term

核电设备至今仍面临许多不易解决的问题。经过对核电设备和结构部件多例事故的分析可知 ,核电设备中微动是不可避免的现象。核能工程中的相当一部分结构损伤事故与微动损伤有着直接的关系 ;在应力集中、腐蚀部位 ,微动又是许多核电设备提前损伤失效的直接原因。微动损伤使得许多核电设备随着堆龄的增加损伤失效事例越来越多 ,研究和分析核电设备结构中的微动损伤实属必要 。

A lot of difficulties have been facing in nuclear power equipment and structures.Analyzed the many damage accidents,we have discovered that it is impossible toavoid the fretting in nuclear power equipment and structures.Maybe,too many of the accidents are directly relevant to the fretting damage.Fretting is the first reason of the failures in ahead of time in lots of equipment and structures,especially,on the parts of stress concentration and erosion.The increasing failures and deformations are scaling to the operating circles,which are mainly caused by fretting.It is necessary to study and analyze the fretting damage in nuclear power equipment and structures,and one of the tech bases to develop the long time nuclear powers.