Abstract
Emergency states that arise at influence of free fire on an oil and gasoline tank shell lead to thermal stress that can cause shell damage, a decrease of hardness and material strength. The paper considers a method for determination of a non-steady thermal field of the shell in a fire centre. Besides, the authors have got a thermal conductivity equation in partial derivatives and suggest a new approximation of the thermal field in the form of polynomials. The method is realized in the MathCad program complex and can be used at design of railway tanks for transportation of dangerous freights and at development of systems for protection from emergency thermal influences.
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