The mathematical model of gas dynamics and energy transfer was developed for porous products of pyrotechnic compositions burning. The heat transfer parameters where identifying in the system "heat source - heated object." Gradient-temperature criterion was substantiated of concrete constructions destruction. Engineering method of the constructions elements fire resistance limit predicting was proposed in technogenic accidents.
элемент конструкции, модели теплообмена, критерий разрушения, метод прогнозирования, construction element, heat transfer models, destruction criterion, prediction method
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