排序方式: 共有54条查询结果,搜索用时 15 毫秒
11.
12.
国际热核聚变实验堆(ITER)超导电流传输线导体的内部电缆体由超导股线和纯铜股线经多级绞缆后复合而成,相对柔软。在传统复合材料理论的基础上,对ITER超导电流传输线导体等效弹性模量进行理论预测:预测一,只考虑电缆体外的不锈钢导管、双绝缘和双屏蔽层;预测二,忽略柔性电缆体的影响,但考虑其内部氦管;预测三,假设电缆体呈各向同性,弹性模量取1~10GPa;预测四,利用均匀化理论分析电缆体的等效弹性模量,复合材料损伤理论分析超导电缆与中心氦管之间、电缆复合体和不锈钢导管之间界面情况。预测值与参考实验值进行比较证实,预测四较符合实际情况,电缆体对整个超导电流传输线导体等效弹性模量的影响较小。 相似文献
13.
14.
15.
16.
Vacuum vessel of the HT-7U is a fully welded toroidal structure with a noncircularcross-section nested in the bore of the TF coils. According to the requirement of the physicsdesign, sixteen horizontal ports on outboard mid-plane and thirty-two vertical ports on the topand bottom are designed for diagnostics, plasma heating, current driving, vacuum pumping andgas puffing. Bellows on these port necks are used for flexible components to absorb the relativedisplacement in radial and vertical directions due to external load, thermal expansion or contrac-tion and assembly tolerance, and also used for isolation of mechanical vibration. For the supportsystem of vacuum vessel it should be not only strong enough to withstand forces acting on thevessel interior components and the vessel itself due to the dead weight and electromagnetic inter-actions during plasma disruption, but also sufficiently flexible to be suited to thermal expansionduring baking. In order to solve this contradiction a new kind of low rigid s 相似文献
17.
EAST (experimental advanced superconducting tokamak) is an advanced steadystate plasma physics experimental device, which is being constructed as the Chinese National Nuclear Fusion Research Project. During the plasma operation the vacuum vessel as one of the key component will withstand the electromagnetic force due to the plasma disruption, the Halo current and the toroidal field coil quench, the pressure of boride water and the thermal load due to 250℃ baking by pressurized nitrogen gas. In this paper a report of the static and dynamic mechanical analyses of the vacuum vessel is made. Firstly the applied loads on the vacuum vessel were given and the static stress distribution under the gravitational loads, the pressure loads, the electromagnetic loads and thermal loads were investigated. Then a series of primary dynamic, buckling and fatigue life analyses were performed to predict the structure's dynamic behavior. A seismic analysis was also conducted. 相似文献
18.
The Procedure for Assembling the EAST Tokamak 总被引:1,自引:0,他引:1
Due to the complicated constitution and high precision requirements of the EAST superconducting tokamak, a meticulous assembling procedure and measurement scheme must be established. The big size and mass of the EAST machine's components and complicated configuration with tight installation tolerances call for a highly careful assembling procedure. The assembling procedure consists of three main sub-procedures for the assembling of the base, of the tori of the VV, the vacuum vessel TS and the TF, and of the peripheral parts respectively. Before the assembly, a reference framework has been set up by means of an industrial measurement system with reference fiducial targets fixed on the wall of the test hall. In this paper, the assembling procedure is described in detail, the survey control system of the assembly is discussed, and progress in the assembly work is also reported. 相似文献
19.
The Alignment and Assembly for EAST Tokamak Device 总被引:1,自引:0,他引:1
EAST (HT-7U) is a large fusion experimental device. It is a full superconducting tokamak with 1 MA of plasma current, 1000 s of plasma duration, high elongation and triangularity. It mainly consists of superconducting magnets of poloidal and toroidal field (PF & TF), vacuum vessel (VV), thermal radiation shield (TRS) and cryostat vessel (CV). The significant difficulty for assembly of EAST is tight installation tolerances, which are in the order of several tenth of a millimeter. In particular, the alignment of plasma facing components to the magnetic axis of the device is less than ±0.5 mm. At present, a reasonable assembly process of EAST has been defined, and based on it, the alignment method for EAST, including the survey control network, the location of the main components in different directions, the magnetic axis determination and the accurate positioning of the plasma facing components inside of the vacuum vessel and so on, has been defined by using the sophisticated optical metrology system (SOMS). This paper describes the assembly procedure of EAST and the installation tolerances associated with the main components. Meanwhile, how to establish the assembly survey control network, magnetic axis determination methods, are introduced in detail. 相似文献
20.
国际热核聚变实验堆(ITER)超导纵场线圈内馈线系统位于主机杜瓦内,由18个盒体分别悬挂于相应纵场磁体终端,通过连接件组成多边形环。在装置降温过程中,内馈线与磁体冷却收缩的不同步导致相邻盒体环向端面发生相对位移,这要求连接件具有位移补偿功能。通过对内馈线收缩过程的研究,采用有限元分析法对内馈线稳态及瞬态温度场进行数值模拟,得到内馈线的热负荷值、温度及热应力分布、温度及变形的时间历程曲线,结果证明,内馈线无需主动冷却且热负荷小,热应力对结构强度影响小。研究结果同时为具有补偿功能连接件的设计提供了初步参数。 相似文献