针对我国X射线时变与偏振卫星(XTP)项目中高能X射线聚焦望远镜的研制需求,初步设计了嵌套式、类Wolter-I型X射线望远镜并进行了结构优化。基于X射线望远镜的光学设计理论,给出了嵌套式聚焦望远镜的光学结构参数。利用有限元分析软件ABAQUS,建立了嵌套式X射线聚焦望远镜的有限元模型。采用基础激励法模拟了X射线聚焦望远镜模型的随机振动,得到了望远镜结构的应力分布。通过切换层的方式,降低了望远镜结构的应力,达到了多层膜承受应力的要求。该研究为XTP项目中的X射线望远镜载荷设计提供了参考。

For the X-ray timing and polarization (XTP) project in China,the optical structure of nested conical Wolter-I X-ray telescope was designed and optimized. Based on the theory of optical design of X-ray telescope, the optical parameters were calculated. By ABAQUS, the finite element model of nested telescope was established. The base-excitation method was used to carry out random vibration analysis. By switching layers, the stress of the telescope structure was reduced, which can meet the requirement of multilayers’ stress. This research provides a support for the design of X-ray telescope in XTP project.