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论文类型：期刊论文

发表时间：2022-06-29

发表刊物：中国电机工程学报

所属单位：运载工程与力学学部

期号：14

页面范围：82-87

ISSN号：0258-8013

摘要：A new method was represented for estimating temperature-dependent thermal conductivity by solving transient inverse heat conduction problems.In the direct problem,the measurement temperatures were obtained by a finite element method.In the inverse problem,the inverted parameters were treated as the optimization variables,and the errors to be minimized were the differences between the calculated temperatures and the measured ones.The solutions were obtained by minimizing the objective function.The complex-variable-differentiation method was introduced into transient inverse heat conduction problems,for the precise calculation of sensitivity coefficient.Examples were given to demonstrate the effectiveness and accuracy of the inverse approach.The results show that muti-parameters can be simultaneously retrieved by the proposed approach.The prior information on the functional form of the thermal properties is not necessary for the proposed approach.Accurate results can be obtained with accurate measurement data,and satisfactory results can be obtained with certain measurement errors,which further indicates the robustness of the proposed approach.

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