摘要
本文以某核电厂为例,分别依据ASME规范和RCC-M规范,采用有限元软件ANSYS对反应堆压力容器的疲劳行为进行分析计算.在两类规范中,疲劳分析的一个重要差异体现在地震载荷与其他瞬态载荷的组合方式上,因此,本文着重关注地震载荷在压力容器疲劳分析中的影响.疲劳评定主要包括以下步骤:压力容器模型的建立、瞬态计算和疲劳分析.RCC-M规范对地震载荷的处理方式相对保守.但由于地震载荷对压力容器疲劳分析的影响有限,所以两种规范的疲劳评定结果十分相似.最终的疲劳评定结果显示,压力容器的一次加二次应力辐值和累计疲劳使用系数都满足ASME和RCC-M规范中的要求.
The fatigue analysis of the reactor pressure vessel is carried out using finite element software ANSYS according to ASME standard and RCC-M standard, respectively. The aim of this work is to evaluate the effect of seismic load on fatigue analysis, because a major difference of fatigue analysis method between the two standards is how to combine the seismic load with other transient loads. The analysis includes three main steps, i.e., pressure vessel modeling, transient calculation and fatigue analysis. The RCC-M standard is more conservative, but the difference between the fatigue analysis results of the two standards is insignificant, due to the limited influence of seismic load on pressure vessel fatigue analysis. The fatigue analysis results show that the stress amplitudes and the cumulative fatigue usage factors of the pressure vessel meet the requirements of both ASME and RCC-M standards.
出处
《力学季刊》
CSCD
北大核心
2016年第3期543-550,共8页
Chinese Quarterly of Mechanics
基金
国家科技重大专项课题(2013ZX06002001-003)
