Abstract: An integrated thermal protection structure based on SiO2 aerogels was established to solve the problem of external surface thermal protection of firefighting robots. The heat transfer model of the thermal protection structure is set up, and the temperature distribution of the integrated structure under different working conditions is simulated by ANSYS software to analyze the thermal insulation performance and heat transfer mechanism. Different thermal insulation materials are compared, the sensitivity of the integrated thermal protection structure is analyzed by using the optimal Latin hypercube method, and the thickness of the structure is optimized by using genetic algorithm under the premise of meeting the constraints. The results show that SiO2 aerogels have better thermal insulation performance than other thermal insulation materials. At the same time, compared with the glass fiber with similar thermal insulation performance, the thermal insulation capacity is increased by 57% under the same thickness, and the surface density and thickness optimization are increased by 9.1% and 8.3%, respectively, and the maximum cold surface temperature of the body structure is reduced by 56.5%, and the anti-thermal insulation performance of the integrated thermal protection structure is significantly improved.

Key words: SiO2 aerogel, thermal protection structure, thermal insulation performance analysis, optimal Latin Hypercube, genetic algorithm