| Integrated Thermal Protection System both fulfilling the function of thermal protection and load bearing has simple structure form and high structural efficiency, it is a form of thermal protection system with high development prospect. As the aircraft bearing wall plate, Integrated thermal protection structure can give full play to its bearing capacity and the insulating ability, and enhance efficiency of structure. The load bearing capacity and heat insulating capacity contradict each other,the structural design and optimization method has been studied in this paper, under the constraints of temperature, strength and stability.Heat transfer of Integrated thermal protection structure is a complex transient heat transfer problem. The simplification of heat transfer model and rapid estimation of structure temperature can effectively improve the design efficiency of the integrated thermal protection structure.The local bulking of thin-walled structure under the elastic boundary support condition. Based on the load distribution principle, the analysis and calculation method of thin-walled structure’s local buckling is proposed, fulfilling the local buckling calculation of thin plate under the elastic boundary support condition. According to the relationship between the stiffness distribution and the ability to resist buckling of thin-walled structure, as well as the idea of the full stress criterion, the optimal conditions for the local stability of stiffened panel structure is put forward. Besides, Synchronous buckling optimum criteria of stiffened panel is proposed, fulfilling the rapid design and optimization of stiffened panel on the basis of structural efficiency.Finally, the rapid design and optimization method of Integrated thermal protection structure is summarized, the design result by the method meets all the constraint conditions and agrees with the theoretical analysis. The result by FEM software verified the correctness of this method. |
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