| The Space-borne Antenna is a new type of foldable structure which appears in recent years. The Space-borne Antenna always enters into and leaves the earth shadow periodically when it orbits the earth, and it is affected by the shadows of itself. So high temperature gradient and severe temperature variation in this structure will induce thermal expansion, thermal stress and thermal deformation. Obviously, The Influence Parameter Analysis Of thermal stability is very important for Space-borne Antenna to maintain its high thermal stability.The paper elaborated thermal analytical theories and thermal stability analytical theories when The Space-borne paraboloidal Antenna orbits the earth;Built up thermal calculation model of Space-borne paraboloidal Antenna with the I-DEAS software, Analyze the influence factor of the thermal stability when it orbits the earth; Divided the Earth shadow area in detail, Mean temperature variation with the rate of temperature variety when it enters into and leaves the earth shadow area; Computed the different parameter carry influence to the rate of temperature variety respectively; Analyzed the influence of temperature gradient to the thermal stability; Mean temperature distribute with the average deviation, combined the square root error of transform this moment, passed analysis ,We could gets the judge to influence the thermal stability of Space-borne Antenna. Full consider the orthotropic of beehive material, Used different equivalent method, we can saw the temperature variation of Space-borne Antenna.
|
PDF Full Text Request