计算物理 ›› 2006, Vol. 23 ›› Issue (2): 151-157.

• 研究论文 • 上一篇    下一篇

同伦正则化算法求解多宗量瞬态热传导反问题

薛齐文1, 杨海天1, 杜秀云2   

  1. 1. 大连理工大学工程力学系, 工业装备结构分析国家重点实验室, 辽宁 大连 116023;
    2. 辽宁师范大学物理系, 辽宁 大连 116023
  • 收稿日期:2004-12-13 修回日期:2005-05-11 出版日期:2006-03-25 发布日期:2006-03-25
  • 作者简介:薛齐文(1976-),男,湖北孝感,博士生,从事多宗量反问题研究.
  • 基金资助:
    教育部骨干教师资助计划项目[2000-65];工业装备结构分析国家重点实验室开放基金[GZ9814];973项目NKBRSF[G1999032805];重点基金[10032030];辽宁省中青年学术带头人基金资助项目

An Inverse Heat Conduction Problem with Multi-variables in a Transient State with a Homotopic Regularization Method

XUE Qi-wen1, YANG Hai-tian1, DU Xiu-yun2   

  1. 1. Dept. of Engineering Mechanics, Dalian University of Technology, State Key Lab of Structural Analysis for Industrial Equipment, Dalian 116023, China;
    2. Dept. of Physics, Liaoning Normal University, Dalian 116023, China
  • Received:2004-12-13 Revised:2005-05-11 Online:2006-03-25 Published:2006-03-25

摘要: 以Bregman距离函数作为正则化泛函,建立了多宗量瞬态热传导反演的一种求解模式,可对导热系数和边界条件等进行联合识别.时域上采用精细算法进行离散,并应用同伦算法进行求解.对信息的测量误差和初值选取作了初步探讨,并进行了数值验证.

关键词: 正则化, 同伦算法, 精细算法, 多宗量, 反问题

Abstract: Taking Bregman D-Function as a regularization function, we present a general numerical model to identify the multi-variables, including thermal parameters and boundary conditions. A time stepping scheme is used for the transient analysis and a homotopy method is adopted to solve the process. Both the data with measurement errors and the initial value are used to indentify these parameters. The numerical validation exhibits good results.

Key words: regularization, homotopy method, precise algorithm, multi-variables, inverse problem

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