Design of the corrugated-core sandwich panel with external active cooling system

Optimal structure of thermal barrier skins used for rescue vehicles experiencing extreme conditions is developed. The conditions include extreme arctic cold and possible extreme heat of burning oil. The skin structure includes fibrous insulation material as well as external active cooling system using sprinklers. Optimal design variables, for the best combinations of the thermal and mechanical performances - the panel geometry and the discharge density - are examined by the analytic and numerical means. It is shown that the high discharge density in the cooling system may be necessary not only for the thermal protection, but also to provide the strength of the panel elements. In particular under the considered loading conditions, the solution of the optimization problem with all constraints exists only for the enough high discharge density due to the thermal buckling of the web elements inside the panel under non-uniform heating.