Inverse Problem Model of Interface Heat Transfer Coefficient in Aluminum Alloy Casting Process Based on L-M Algorithm
The change of the interfacial heat transfer coefficient between the casting and the mold in the aluminum alloy casting process is very complex and difficult to predict.Based on the L-M(Levenberg-Marquardt)algorithm,an inverse problem model of heat transfer in the aluminum alloy casting process was established,and the heat transfer coefficient of the casting-mold interface during the aluminum alloy casting process was obtained through the inverse problem analysis.By comparing the inversion value of the heat transfer coefficient of the casting-mold interface with the standard value,the accuracy of the heat transfer inverse problem model was verified.On this basis,the influence of the position of measuring points(distance from the casting-mold interface,distance between adjacent temperature measuring points)and temperature measurement errors on the inversion value of the heat transfer coefficient of the casting-mold interface were analyzed,and the optimal measuring point layout scheme and temperature measurement error requirements were given.Through the aluminum alloy casting experiment,the inverse problem model can be used to solve the heat transfer coefficient of the casting-mold interface during the solidification process of the aluminum alloy.
castinginverse heat transfer modelLevenberg-Marquardt(L-M)algorithminterfacial heat transfer coefficientsolidification
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