小体积大抽速多发源钛升华泵

介绍使用在超高超人空下，被抽气体主要为ＣＯ的小体积、大抽速、多发源钛升华泵的设计思想、结构特点和部分测试结果。     

振动调制工艺在控制焊接变形中的试验研究

在介绍振动调制工艺原理的基础上,通过振动调制工艺在平板对接接头上的试验应用,分析了振动调制工艺在控制焊接变形方面的应用。试验结果表明该工艺对于厚板对接角变形,振动的效果不是非常明显,但是对横向收缩量的影响效果明显。     

ITER遥控运输车结构初步设计及分析

阐述了ITER遥控运输车整体结构和工作情况,运用有限元方法对整车分三种载荷情况进行静力学分析,并对遥控运输车取入真空室部件过程进行瞬态动力学分析,验证了各种情况下遥控运输车的安全性并给下一步的优化设计和实验提供了参考数据.     

固体自润滑材料在EAST超导托卡马克中的应用

EAST超导托卡马克是具有非圆截面的核聚变试验装置,其真空室内部部件在等离子体热壁运行时将承受相当大的热应力和电磁载荷,在某些工况下的应力可能超出材料的强度极限.对EAST超导托卡马克装置中的真空室内部部件的应力状况进行了计算分析,从理论上提出了运用润滑材料的必要性;研制了一种金属基多层固体自润滑复合材料,摩擦学性能测试表明,该自润滑复合材料具有特殊的梯度结构,能保证高的机械强度,且具有优异的摩擦磨损性能和连续润滑功能;有限元计算和模拟件的加热变形试验表明,该自润滑复合材料真空中的滑动摩擦因数不超过0.15,能减少内部部件应力集中的情况,避免应力过大对热沉材料造成的破坏,保障超导托卡马克装置聚变试验的安全.     

Design of snowflake-diverted equilibria of CFETR

The Chinese Fusion Engineering Test Reactor (CFETR) represents the next generation of full superconducting fusion reactors in China.Recently,CFETR was redesigned with a larger size and will be operated in two phases.To reduce the heat flux on the target plate,a snowflake (SF) divertor configuration is proposed.In this paper we show that by adding two dedicated poloidal field (PF) coils,the SF configuration can be achieved in both phases.The equilibria were calculated by TEQ code for a range of self-inductances li3.The coil currents were calculated at some fiducial points in the flattop phase.The results indicate that the PF coil system has the ability to maintain a long flattop phase in 7.5 and 10 MA inductive scenarios for the single null divertor (SND) and SF divertor configurations.The properties of the SF configuration were also analyzed.The connection length and flux expansion of the SF divertor were both increased significantly over the SND.     

核聚变装置放电真空室材料的要求和发展

通过回顾托马克构核聚变实验装置的发展历程和放电真空室及内部部件材料的运用历史,联系近些年国内外一些托马克装置的最新实验结果,对不锈钢、钛合金、纤维增强的复合材料在放电真空室上的应用进行展望,为未来核聚变实验装置的工程设计和材料选择提供了依据。     

HT-7U真空室支撑结构的数值模拟与实验研究

结合HT-7U超导托卡马克装置真空室的实际运行工况，首先提出一种低刚度柔性支撑结构，这种结构不仅有足够的强度，抵抗由于等离子体突然破裂产生的巨大电磁力，而且还有一定的弹性，吸收真空室在250℃壁处理烘烤时所产生的热变形。然后运用有限元分析方法对该结构的力学性能进行数值模拟分析，获得HT-7U真空室支撑结构的应力云图，最大应力为97MPa，小于结构基体材料316L不锈钢的许用应力。同时还专门设计一套真空室支撑结构力学实验测试平台，利用光弹贴片法和电阻应变计测量法，对该结构进行全面的力学性能测试，不仅验证有限元分析结果的可信件，而且还寸步证实HT-7U真空室支撑结构设计的合理性和安全性。     

Seismic response analysis for equatorial diagnostic port plug of international thermonuclear experimental reactor

Modal analysis and seismic response analysis were carried out for the equatorial diagnostic port plug of international thermonuclear experimental reactor (ITER). The aim of the theoretical analysis is to verify structural strength and reliability of the device. The working condition includes one-dimensional seismic wave and two-dimensional seismic wave. Modal analysis of the device shows that primary vibration is inclined to occur in low-order modes. The horizontal (X-direction, Y-direction) maximum vibration appears at the first and the fourth eigen modes, with the natural frequency of 70.59 and 215.88 Hz respectively, and the vertical (Z-direction) primary vibration appears at the second eigen mode with the natural frequency of 82.85 Hz. According to the results of the finite element analysis (FEA) program, the weak portions of the device are distributed in the joint of port body with blanket shielding module (BSM) and inner side wall of ribbed plate for lifting flange, the maximum von Mises stress is 14.8 MPa with the Y-direction seismic wave. In accordance with the design criteria, the destructive effect is far below the failure boundary, and the structural reliability of the equatorial diagnostic port plug can meet the requirements of the design specifications. Foundation item: Project(10405024) supported by the National Natural Science Foundation of China; Project supported by International Thermonuclear Experimental Reactor Organization in France     

A Lower Rigid Support Structure for the HT—7U Vacuum Vessel

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