摘要
对一个可展桁架式抛物面天线,利用有限元法,将可展支撑桁架划分为一维辐射-导热杆单元,将反射面划分为二维辐射-导热三角形膜单元,以此模型,计算和分析可展桁架天线在空间环境中的温度场和热变形,得到了可展桁架天线温度场和热变形特点,以及可展支撑桁架对天线整体温度场和热变形的影响.
A finite element model of a deployable truss parabolic antenna is made that deployable trusses are divided into one dimensional transient radiation-conduction rod elements and reflector net is divided into two dimensional transient radiation-conduction membrane elements. Analytical assumption are proposed, temperature function of rod element is linear and temperature function of membrane element is quadratic. In order to obtain all-sided thermal-structural features of antenna, the sun radiation flux is simulated by six cases, which are defined by the angle between sun radiation and antenna net. Based on the model, temperature field and thermal deformation of the antenna are calculated and analyzed. The thermal-structural features of deployable truss antenna and the influence of deployable truss on the whole temperature field and thermal deformation of antenna are presented.
出处
《空间科学学报》
CAS
CSCD
北大核心
2005年第3期235-240,共6页
Chinese Journal of Space Science
基金
国家863计划项目资助(863-2-2-1-12)
