空间相机碳纤维支撑结构改进及拓扑优化设计

Improvement of carbon fiber support structure and topology optimization design for space camera

碳纤维复合材料杆件密度小、比刚度高、线胀系数小,因此,碳纤维杆件支撑结构是空间相机框架常用支撑结构。采用螺纹胶接方法对碳纤维复合材料与金属件结构预埋工艺进行了有效的改进,提高了结构固有频率6Hz左右,有效提高了构件间的连接强度和刚度。采用拓扑优化方法对空间相机支撑结构进行优化设计,并采用有限元分析法对某型空间相机支撑结构优化设计的结果进行检验。结果表明:支撑结构在一阶固有频率提高了9.5%,为相机后续研制工作提供了一定基础。

Because of the low density,high stiffness and low linear expansion coefficient of carbon fiber composite bar, the supporting structure made by carbon fiber rods is generally used as the framework of support structure for space camera. Embedded technology of carbon fiber composite materials and pieces of metal were improved effectively by using thread bonding method and the natural frequency of the support structure was enhanced about 6 Hz, and also the link strength and stiffness among components. Support structure of space camera was designed optimally by use of topological optimization method and the result of support structure of a certain type of space camera was tested by use of finite element analysis method. The results shows that support structure in the first-order natural frequency increases 9.5 percent, and provide a certain foundation for the further development of the cameras.