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在ANSYS Workbench软件中建立了星载铯束管内铯炉的有限元模型。采用兰索斯法对模型作了模态分析,获得了铯炉的固有频率及振型。利用模态叠加法对模型作了铯炉的谐响应分析,研究了铯炉及其内部关键部件的结构变形与应力分布情况。数值结果表明:炉体主体结构和铯泡支撑体是铯炉力学特性的关键环节,会影响石墨、铯泡和准直器的工作性能。针对结构设计中存在的薄弱环节,提出了对铯炉主体结构和铯泡支撑体进行改进的有效措施。改进后铯炉的力学特性增强,对比铯束管内芯的基频,可避免铯炉不会发生共振。同时,由于抑制了振动对炉体内关键部件的影响,使得铯炉对铯流体的管理能力明显增强。
In the ANSYS Workbench software, a finite element model of a cesium-based Cesium Furnace tube furnace was established. The model was modeled by Lansos method, and the natural frequencies and modes of cesium furnace were obtained. The modal superposition method was used to analyze the harmonic response of the cesium furnace, and the structural deformation and stress distribution of the cesium furnace and its key components were studied. The numerical results show that the main structure of the furnace body and the support of cesium foam are the key links in the mechanical properties of cesium furnace, which will affect the performance of graphite, cesium bubble and collimator. In view of the weak links existing in the structural design, the effective measures to improve the structure of the main body of cesium furnace and the support of cesium bubble are proposed. Improve the mechanical properties of cesium furnace enhanced cesium core tube compared to the fundamental frequency can be avoided cesium furnace resonance will not occur. At the same time, due to the inhibition of the vibration of the key components of the furnace body, making cesium furnace cesium fluid management ability was significantly enhanced.