卫星高稳定复合材料框架结构仿真优化

OPTIMIZATION OF HIGH STABLE COMPOSITE FRAME STRUCTURE IN THE SATELLITE

随着卫星有效载荷的精度越来越高,作为卫星本体和有效载荷过渡的框架结构在空间环境下的热变形已不能忽略,其结构的热稳定性需要在初始设计时进行考察。针对卫星用高稳定复合材料框架结构,采用Hyperworks有限元软件,重点对其构型进行了拓扑优化,同时也考察了结构构型、铺层厚度和铺层角度对复合材料框架重量、刚度和热稳定性的影响。结果表明,与原有构型相比,优化后的框架结构质量降低了25. 1%,基频提高了48. 8%,热变形下降了57. 1%,通过Hyperworks拓扑优化方法显著提高了复合材料框架结构的稳定性,可指导卫星高稳定复合材料的结构设计。

With the increasing accuracy of the satellite payload,the thermal deformation of the frame structure as the satellite body and payload transition in the space environment cannot be ignored,and the thermal stability of the structure needs to be investigated at the initial design.In this paper,Hyperworks finite element software is used for satellite high-stability composite frame structure,and the topological optimization of the structure is emphasized.The structural configuration,the thickness of the ply and the angle of the ply are also investigated.The weight,stiffness and heat of the composite frame are also considered.The results show that compared with the original configuration,the optimized frame structure quality is reduced by25.1%,the fundamental frequency is increased by48.8%,and the thermal deformation is reduced by57.1%.The Hyperworks topology optimization method significantly improves the composite frame structure,can guide the design of satellite high stability composite structure.