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A Lower Rigid Support Structure for the HT-7U Vacuum Vessel 被引量:3
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作者 宋云涛 姚达毛 +1 位作者 武松涛 翁佩德 《Plasma Science and Technology》 SCIE EI CAS CSCD 2002年第3期1289-1296,共8页
Vacuum vessel of the HT-7U is a fully welded toroidal structure with a noncircular cross-section nested in the bore of the TF coils. According to the requirement of the physics design, sixteen horizontal ports on outb... Vacuum vessel of the HT-7U is a fully welded toroidal structure with a noncircular cross-section nested in the bore of the TF coils. According to the requirement of the physics design, sixteen horizontal ports on outboard mid-plane and thirty-two vertical ports on the top and bottom are designed for diagnostics, plasma heating, current driving, vacuum pumping and gas puffing. Bellows on these port necks are used for flexible components to absorb the relative displacement 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 support system of vacuum vessel it should be not only strong enough to withstand forces acting on the vessel 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 expansion during baking. In order to solve this contradiction a new kind of low rigid support has been designed, which has a perfectly rigid in vertical direction and perfectly soft in radial direction. Some three-dimension finite element COSMOS models were performed to analyze their structural strength, stiffness and fatigue life, with an emphasis on the static stress analysis. The load spectra during vacuum vessel operation were also simulated on these models in the view of fatigue design. It was confirmed that the bellows and support had sufficient strength in the designed range of the load conditions. The results showed that the peak stress on bellows was 87 MPa and on the support system was 97 MPa. Now all kinds of bellows and support system have been designed. In order to accumulate some engineering experiences and probe into some molding die and welding technologies, prototypical bellows and support system have been fabricated. At the same time a mechanical testing apparatus was designed for proof tests on the prototypical bellows and support to verify their functional and structure capability. The experimental data indicated that the re-sults of finite element analysis were coincident with experimental test results. It has been proved that the present vacuum vessel's bellows and support system are reasonable and feasible. 展开更多
关键词 A Lower Rigid Support Structure for the ht-7U vacuum Vessel HT
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An Optimized Structure Design of the HT-7U Vacuum Vessel 被引量:1
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作者 姚达毛 宋云涛 +3 位作者 杜世俊 吴维越 武松涛 何也熙 《Plasma Science and Technology》 SCIE EI CAS CSCD 2001年第4期865-870,共6页
The vacuum vessel of the HT-7U superconducting tokamak will be a fully-welded structure with a double-wall. The space between the double-wall will be filled with borated water for neutron shielding. Non-circular cross... The vacuum vessel of the HT-7U superconducting tokamak will be a fully-welded structure with a double-wall. The space between the double-wall will be filled with borated water for neutron shielding. Non-circular cross-section is designed for plasma elongating. Horizontal and vertical ports are designed for diagnosing, vacuum pumping, plasma heating and plasma current driving, etc. The vacuum vessel consists of 16 segments. It will be baked out at 250℃ to obtain a clean wall. When the machine is in operation, both the hot wall (the wall temperature is around 100℃) and the cold wall (wall temperature is in normal equilibrium) are considered. The stress caused by thermal deformation and the electromagnetic (EM) loads caused by 1.5 MA plasma disruption in 3.5 T magnetic field have to be taken into account in the design of the HT-7U vacuum vessel Finite element method was employed for structure analysis of the vacuum vessel. 展开更多
关键词 An Optimized Structure Design of the ht-7U vacuum Vessel DESIGN HT
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Electrical Parameters of the Vacuum Vessel in HT-7U Tokamak 被引量:1
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作者 杜世俊 陶果 《Plasma Science and Technology》 SCIE EI CAS CSCD 2001年第2期703-708,共6页
A method is presented to express the electrical parameters of the vacuum vessel in this paper. According to the results of numerical computation and the distribution of the eddy currents, the mutual inductance can be ... A method is presented to express the electrical parameters of the vacuum vessel in this paper. According to the results of numerical computation and the distribution of the eddy currents, the mutual inductance can be given by calculating the flux produced by the toroidal eddy currents. The time constants of the vacuum vessel of HT-7U tokamak are derived from the decay characteristics of the eddy currents. 展开更多
关键词 Electrical Parameters of the vacuum Vessel in ht-7U Tokamak HT
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Linear Buckling Analysis of the HT-7U Vacuum Vessel 被引量:1
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作者 宋云涛 姚达毛 +1 位作者 武松涛 翁佩德 《Plasma Science and Technology》 SCIE EI CAS CSCD 2000年第2期245-249,共5页
The vacuum vessel of the HT-7U superconducting Tokamak is designed as an allmetal welded double-wall structure with a number of radial and vertical ports. With characteristicsof ultrahigh vacuum and thin shell, the an... The vacuum vessel of the HT-7U superconducting Tokamak is designed as an allmetal welded double-wall structure with a number of radial and vertical ports. With characteristicsof ultrahigh vacuum and thin shell, the analysis on stability is very important to the design. Toachieve a successful final design, a threedimension buckling model has been performed using thefinite element program CoSMOS/M2.0. For all the cases having been considered, a 1/16 segmentof the whole toric shell are used to calculate the linear critical buckling load (Pc.,,) under auniform and nonwhform external pressure. As expected, the structure has a good capability ofwithstanding the applied loads. 展开更多
关键词 HT Linear Buckling Analysis of the ht-7U vacuum Vessel
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HT-7超导托卡马克真空运行的安全保护 被引量:1
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作者 王厚银 王小明 +1 位作者 辜学茂 杨愚 《真空》 CAS 北大核心 2007年第1期42-45,共4页
根据HT-7托卡马克装置所处不同阶段对真空的要求不同,介绍该安全保护系统如何构建以满足不同阶段的需要。重点论述了在真空运行的各个阶段,需要监测的真空参数以及如何根据这些参数实现安全保护的。最后介绍该系统如何协同工作、保证实... 根据HT-7托卡马克装置所处不同阶段对真空的要求不同,介绍该安全保护系统如何构建以满足不同阶段的需要。重点论述了在真空运行的各个阶段,需要监测的真空参数以及如何根据这些参数实现安全保护的。最后介绍该系统如何协同工作、保证实验顺利进行以及目前该系统的实际运行情况。 展开更多
关键词 ht-7真空室 安全保护系统 远程监测 自动控制
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