Abstract Super-X test facility can simulate the electromagnetic performances of a superconducting conductor under fusion reactor operating conditions, in which DC magnets are a core assemble. The DC test magnet provides 15 T central magnetic field. The field homogeneity of test area is more than or equal to 98 %. The magnet comprises three pairs of Nb3Sn coils (i.e., high-field, mid-field and low-field.). Included in the magnet assembly are a preload structure, joints, cooling pipe, etc. The preload structure includes preloaded rods, pre-tightening screws, end plates, an intermediate connection flange, buffer layers and shims between coils. The main function of the preload structure is to maintain registration of the coils under magnetic loads, and, secondarily, to support gravity so that they will not separate. It also provides axial preload compression on the coils. Orthotropic equivalent properties of the coil regions are calculated based on generalized Hook’s law and ANSYS software, the superconducting coils are modelled with equivalent orthotropic properties of winding to simplify the finite element model (FEM). A quarter FEM of the simplified DC magnet is established with the coupling solver, and the finite element analysis has verified the design satisfies appropriate design limits base on the ASME Code.

中文翻译：

---

Super-X试验装置直流磁铁预紧结构初步结构设计及应力分析

摘要 Super-X试验设备可以模拟聚变反应堆运行条件下超导导体的电磁性能，其中直流磁体为核心组件。直流测试磁铁提供 15 T 中心磁场。试验区场均匀度≥98%。磁铁包括三对 Nb3Sn 线圈（即高场、中场和低场。）。磁体组件包括预紧结构、接头、冷却管等。预紧结构包括预紧杆、预紧螺钉、端板、中间连接法兰、缓冲层和线圈之间的垫片。预加载结构的主要功能是在磁负载下保持线圈对齐，其次是支撑重力，使它们不会分离。它还在线圈上提供轴向预载压缩。基于广义胡克定律和ANSYS软件计算线圈区域的正交各向异性等效特性，利用绕组等效正交各向异性特性对超导线圈进行建模，以简化有限元模型(FEM)。使用耦合求解器建立了简化直流磁体的四分之一有限元，有限元分析验证了设计满足基于 ASME 规范的适当设计限制。