【摘要】 针对ITER重力支撑系统的特点,提出了ITER重力支撑系统的有限元静力分析方法。应用AN-SYS软件,建立了ITER重力支撑系统三维实体模型。采用精度比较高,且计算规模又可以接受的单元网格划分方法,进行网格划分。在Volume之间的界面上定义接触单元。得到了支撑系统有限元模型。对同时受静载荷与地震载荷作用的ITER重力支撑系统进行了有限元静力分析。获得了支撑系统各零件的应力分布及最大应力,分析了这些零件的强度。结果表明:TF腿、韧性板、环形支撑和支撑圆柱的最大应力分别出现在TF腿与等效环向壳连接处、韧性板与其下法兰焊接的拐角处、环形支撑上端面与其内部加强筋的交接处、支撑圆柱的上端面,这些最大应力都小于其相应的许用应力,按照ASME压力容器评定标准,支撑系统各零件均满足强度要求。静力分析的结果为ITER重力支撑系统的设计或改进提供了可靠的理论依据。更多还原

【Abstract】 According to the characteristics of the gravity support system of ITER,a finite element static analysis method of the system was proposed.ANSYS was applied to built the three dimensional model of the system.A mesh dividing method,which has high precision and an acceptable calculating scale,was used.After the mesh of the model had been divided,the contact elements were defined on interfaces between volumes.The finite element static analysis of the gravity support system under the dead weight and seismic loads was performed.The stress distributions and the maximal stress values of all parts of the gravity support system were obtained,and the stress strength of the parts was analyzed.The results showed that the maximum stresses of the TF leg,the flexible-plate,the ring support and the support column occur respectively on the joint of TF leg and equivalent toroidal shell,at the corner of the weld joint of the flexible-plate and its lower flange,on the joint of the upper transverse plane and internal stiffening rib of the ring support,and on the support column’s upper transverse plane.These maximum stresses are smaller than their respective allowable stress limits.All parts of the gravity support system have enough mechanical strength according to the ASME See.III-NF Code.The results of static analysis lay the solid foundation for the design and improvement of the gravity supports system of ITER.更多还原