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首页> 外文期刊>Plasma Science & Technology >Buckling Analysis of TF Coil Inner Leg for Central Solenoidless Tokamak
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Buckling Analysis of TF Coil Inner Leg for Central Solenoidless Tokamak

机译：中央无螺线托卡马克TF线圈内腿的屈曲分析

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摘要

The central post is one of the critical components for the low aspect ratio tokamak, which endures not only a tremendous ohmic heating because it carries a rather high current, but also a large neutron heating and irradiation owing to the plasma operation. The DS copper alloy Glidcop AL-25 was chosen as the conductor material for its adequate mechanical properties and physics properties. The central post has a cylindrical structure with lots of cooling channels. The length of the central post for the next generation of nuclear fusion spherical tokamaks will be more than 10 m or 20 m. The structural stability is very crucial. When the applied load is larger than the structure critical buckling load, the device will lose its stability and collapse. In order to calculate the critical buckling load, a 1/6-segment finite element model was used and the force acting on the central post was simulated. The results showed that the vertical compressive stresses mainly affect the stability of the central post. The linear buckling analysis results with finite element method based on small deformation theory were given in this paper. The relation curves and functions for buckling factor, depending on the different lengths and the radius of the central post, the diameter of cooling channel and the maximum allowable current density, were also shown.
机译：中心柱是低纵横比托卡马克的关键组件之一，托卡马克不仅承受巨大的欧姆加热，因为它承载着相当大的电流，而且由于等离子运行而承受着大的中子加热和辐射。选择DS铜合金Glidcop AL-25作为导体材料是因为其具有足够的机械性能和物理性能。中心柱为带有大量冷却通道的圆柱形结构。下一代核聚变球形托卡马克的中心柱的长度将超过10 m或20 m。结构稳定性非常关键。当施加的载荷大于结构的临界屈曲载荷时，设备将失去稳定性并崩溃。为了计算临界屈曲载荷，使用了1/6段有限元模型，并模拟了作用在中央立柱上的力。结果表明，竖向压应力主要影响中心柱的稳定性。给出了基于小变形理论的有限元线性屈曲分析结果。还显示了屈曲系数的关系曲线和函数，取决于不同的长度和中心柱的半径，冷却通道的直径以及最大允许电流密度。

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