Deployment Dynamics Research And Thermal Analysis For Space Membrane Structure

Space membrane structures, which have some prominent advantages in space exploration, such as small launched volume and mass, high dependability of deployment, can be used to build large space antenna, solar sail, and other large space structures. The newest theory research and applications of space inflatable structures and membrane structures in abroad and China are introduced firstly in this paper.The deployment modeling of inflatable structures are focus and difficult. Some key technics and major deployment modeling of inflatable structures are introduced firstly. Secondly, a CV method based on airbag model is provided to analysis the deployment process and dynamic characters of a coiled inflatable tube. The analysis results is compared to test results and previous research results and founded that the results are grow very well. The result indicated that deployment velocity of inflatable tube can be controlled by improved the material property of inflatable tube and modeling itself.A new research method is introduced to analysis the deployment mechanics and modeling of inflatable membrane structures based on energy-momentum methods.Firstly, rigid-body dynamics and Euler parameter theory are presented. Secondly, a reduced rigidity model in membrane structure is proposed in analysis of the dynamic wringkle and slack during the deployment process of space membrane structure. Thirdly, this new research analysis based on energy-momentum is conducted to analysis the deployment process of reflector and Z-folded inflatable tube.In analysis of Z-folded inflatable tube, interaction between air and structure, influence of self-contact, collision and wrinkle are also considered. The resusts demonstrated energy-momentum method is dominant in geometric nonlinear and mumerical stabilization.Thermal analysis for space membrane structures is represented. Thermally induced vibration, solar radiation pressure and twist moment and heat flux analysis for inflatable structures is conducted. Inflatable self-rigidizable boom is an important part of the inflatable structures. Spring tape is used to rigidize the boom. Experimental research for the deployment process and dynamic characters of inflatable tube especially for inflatable self-rigidizable boom is represented.