HELIMAK装置真空室结构设计及应力强度分析

STRUCTURE DESIGN AND STRESS ANALYSIS FOR THE VACUUM VESSEL OF THE HELIMAK DEVICE

HELIMAK装置真空室作为该装置的重要部件,是等离子体运行的直接场所,在装置运行期间可以为等离子体的运行提供一种超高真空运行环境。对于此类核聚变装置的结构设计,必须考虑运行时的实际工况载荷,进行详细的结构力学分析,使结构设计充分安全可靠。文中首先借用大型有限元分析程序NASTRAN,对该结构的力学性能进行数值模拟分析,获得了HELIMAK真空室的应力云图和位移变形,最大应力强度为144MPa,最大位移变形为1.98mm。然后在力学分析的基础上对结构进行优化,为该装置的最终研制提供详实的理论依据。

Vacuum vessel is the location for the operation of plasma as one of the key component for the HELIMAK device. It can provide an ultra-high vacuum environment for the plasma operation. It is necessary to consider all the load ease under the plasma operation and do some detailed stress analysis during the design of its structure. Firstly a 3D finite element model was performed to analysis the stress distribution and displacement for the vacuum vessel of HELIMAK device employing NASTRAN software. The maximum stress intensity is 144 MPa and maximum displacement is 1.98mm. And secondly a reliable structure is optimized under the basic of the stress analysis results, which has satisfied the requirement of the physics experiment. All of the numerical simulation results also simultaneously provided a valuable theory basis for the research and development of the device.