超大型真空容器非线性稳定分析

Non-linear stability analysis of a super-large vacuum vessel

利用有限元软件ANSYS对直径为22 m的超大型真空容器进行了非线性稳定分析,研究了其临界失稳压力与结构的关系。结果发现:单纯增加壳体厚度既不能有效提高容器抗外压失稳能力,又会使设备制造成本明显提高;设置恰当的外加强圈,能有效提高容器抗外压失稳能力,同时又能减小设备重量,降低对材料的要求,从而显著降低设备制造成本。

Non-linear stability analysis using the finite element method has been carried out on a super-large vacuum vessel diameter 22 m in order to study the relationship between the critical instability pressure and its structure. The results showed that the critical instability pressure cannot be effectively raised by increasing the thickness of the vessel alone; furthermore the total weight of the vessel increases substantially when the thickness is increased. However, by designing appropriate reinforcement rings, the critical instability pressure of the vessel can be effectively raised with a concomitant decrease in the weight of the whole vessel and decrease in the demands on the material, giving a significant decrease in the total cost of the vessel.