NBI综合测试台真空筒体的结构分析及优化

Design and Optimization of Cylindrical Vacuum Chamber for Multitask Testing System of Neutral Beam Injector

针对核聚变装置中的中性束注入器真空筒体的工作要求,完成了综合测试台真空筒体的结构设计,并对真空筒体各主要部件进行了受力计算和静力分析。分析结果表明,真空筒体各主要部件均满足设计要求,且筒体各段的强度和刚度均远小于所选材料的屈服极限,存在材料浪费。据此,在不改变材料的基础上,进一步对真空筒体进行了结构优化设计,优化后真空筒体重量和体积分别减少28.72%和26.87%,再次模拟分析表明,优化后真空筒体的各主要部件均达到了性能要求。该分析优化方法为复杂模型的优化设计提供参考。

The cylindrical vacuum chamber,consisting of three cylinders and dedicated to the multi-task testing system for the neutral beam injector（NBI） of the thermonuclear fusion device,was designed and optimized.The stress and static force distributions in the major parts of the vacuum cylinder were evaluated.The results show that the strength and stiffness of each part with complicated geometry well satisfy the design requirements.However,the maximum stress and rigidity of the different cylinders were found to be far below the yield strength of the material.We found that the structural optimization of the vacuum cylinder reduced the volume and weight by 28.72% and 26.87%,respectively.The structure-optimized cylinder and its major parts were again modeled and simulated in finite element method.The simulated results show that the main parts of the optimized vacuum chamber satisfy the technical requirements.