摘要
针对管系弹性跟随效应给容器接管根部应力分析评定带来的复杂性问题,首先以双杆模型为理论基础解释了弹性跟随效应的基本原理,而后以标准椭圆封头带中心接管结构为例,先后采用分部法和整体法进行线弹性分析,并采用逐次循环法基于整体法的几何模型进行循环载荷弹塑性分析,详细对比分析了采用分部法与整体法进行管系附加载荷处理的结果差异,揭示了管系附加载荷下的容器应力分析评定应当注意的问题。
In order to solve the complex problem of the elastic following effect of the piping system on the stress analysis and evaluation of the pressure vessel nozzle root,the basic principle of the elastic following effect of the piping system is firstly explained on the basis of the double bar model,then by taking the structure of the standard elliptical head with a central nozzle as an example,the linear elastic analysis is carried out by the partial method and the holistic method,and the cyclic loading elastic-plastic method is used for the holistic geometric model.The difference between the results of the partial method and the holistic method are comprehensively compared and analyzed,and the issues what should be particularly concerned in the analysis and evaluation of the vessel stress under the additional load of the piping system are revealed.
作者
张向兵
段成红
陆明万
罗翔鹏
ZHANG Xiangbing;DUAN Chenghong;LU Mingwan;LUO Xiangpeng(College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China;School of Aerospace Engineering,Tsinghua University,Beijing 100084,China)
出处
《压力容器》
北大核心
2021年第4期27-33,81,共8页
Pressure Vessel Technology
关键词
弹性跟随
管系热胀载荷
二次应力
安定性
有限元
elastic following
thermal expansion load of piping system
secondary stress
stability
finite element
