常态运行的ITER杜瓦结构分析  

The Structural Analyses of ITER Cryostat During Normal Operation

作　　者：汪献伟 谢飞[2] 金环 何庆 WANG Xian-wei;XIE Fei;JIN Huan;HE Qing(School of Mechanical Engineering,Jiangsu University of Technology,Jiangsu Changzhou 213001,China;School of Electronics and Information Engineering,Shunde Polytechnic,Guangdong Foshan 528300,China;Institute of Plasma Physics,Chinese Academy of Sciences,Anhui Hefei 230031,China)

机构地区：[1]江苏理工学院机械工程学院,江苏常州213001 [2]顺德职业技术学院电子信息工程学院,广东佛山528300 [3]中国科学院等离子体物理研究所,安徽合肥230031

出　　处：《机械设计与制造》2021年第5期217-220,共4页Machinery Design & Manufacture

基　　金：广东省自然科学基金(2017A030310640)。

摘　　要：作为一个封装托卡马克的真空压力容器,杜瓦将为冷屏和磁体系统提供真空环境,同时传递来自于自身和线圈系统的载荷,在正常和非正常运行的过程中杜瓦将会遭受地震载荷、电磁力、测试压力、自身净重等载荷的冲击,其中净重和压力载荷是影响杜瓦结构安全性的关键因素,该研究首先基于无力矩理论计算了杜瓦在压力载荷、自身净重以及两者联合作用下的应力状态,获得了杜瓦的危险区域,在此基础上通过应力线性化,提取了危险区域的薄膜、弯曲和峰值应力,最后基于ASME的分析设计对各种不同的应力进行了评定,并分析了局部应力集中的原因,这对于杜瓦的设计优化以及中国聚变工程实验堆杜瓦的设计制造都具有一定的指导作用。As a vacuum vessel enveloping the Tokamak machine,cryostat will provide the vacuum environment for thermal shield and magnet system and also transfer the loads derived from itself and magnetic coils.During the normal and off-normal operation,cryostat may encounter the impact of seismic load,electromagnetic force,test pressure,atmospheric pressure and its dead weight.And dead weight and pressure are the key factors that impact the structural safety of cryostat.Firstly,based on the no torque theory,we calculate the cryostat stress state under the dead weight,external pressure and their combination,then we obtain the dangerous region.On this basis the membrane stress,bending stress and peak stress in the dangerous area are extracted by stress linearization.In the end,stress assessment of cryostat is carried out based on the design-by-analysis method specified in ASME.Meanwhile,the reasons of local stress intensity are analysed.The study will provide somewhat guidance for the cryostat design optimization as well as for the design and fabrication of cryostat of China Fusion Engineering Test Reactor.

关 键 词：托卡马克 顶盖 真空容器 杜瓦 应力线性化 

分 类 号：TH16[机械工程—机械制造及自动化] TL351.1[核科学技术—核技术及应用]