Topology Optimization for Evolutionary Design of Thermal Protection System

Thermal Protection Systems (TPS) design for a spacecraft operating in extreme environments of thermal and acoustic loading is of significant importance for space missions. Design criteria for these two loading conditions tend to be diametrically opposed, and the stresses generated from thermal expansion can be alleviated by reducing the number of boundary constraints, whereas the stresses resulting from acoustic loading are exacerbated by “loose fitting” structure. Therefore, increasing the likelihood of failure of the TPS due to narrower operating region. To reduce the design risks, structural health monitoring techniques are usually used to detect when a structural component has deviated from the feasible design space allowing for repair or replacement of components. However, this research aims at evolving a design rather than modifying an existing design that satisfies both the thermal and acoustic loading conditions.