关键词: 凝固, 正则化, 反问题, 参数辨识, 灵敏度系数, 界面换热系数

Abstract: Interfacial heat transfer coefficient (IHTC) between casting and mould is an essential boundary condition in simulation of metal solidification. We present an inverse method based on Tikhonov regularization theory. A regularized functional is established and regularization parameters are deduced with Arcangeli criterion and Morozov discrepancy principle. The functional is solved by sensitivity coefficients and Newton-Raphson iteration method. The regularization method ensures stability and accuracy of determination and overcomes ill-pesedness of inverse heat conduction problems (IHCP). It shows better accuracy especially with increasing error of measurement temperature.

Key words: solidification, regularization, inverse problem, parameter determination, sensitivity coefficient, interfacial heat transfer coefficient