计算物理 ›› 2005, Vol. 22 ›› Issue (1): 56-60.

• 研究论文 • 上一篇    下一篇

共轭梯度法求解多宗量瞬态热传导反问题

薛齐文, 杨海天, 胡国俊   

  1. 工业装备结构分析国家重点实验室, 大连理工大学工程力学系, 辽宁 大连 116023
  • 收稿日期:2003-09-07 修回日期:2004-06-01 出版日期:2005-01-25 发布日期:2005-01-25
  • 作者简介:薛齐文(1976-),男,博士生,从事传热反演研究.
  • 基金资助:
    教育部重点基金[99149];教育部骨干教师资助计划[200065];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

A Conjugate Gradient Method for Inverse Heat Conduction Problems with Multi-variables in Transient-state

XUE Qi-wen, YANG Hai-tian, HU Guo-jun   

  1. State Key Lab of Structural Analysis of Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, China
  • Received:2003-09-07 Revised:2004-06-01 Online:2005-01-25 Published:2005-01-25

摘要: 提出瞬态热传导反问题中热物性参数和边界条件多宗量反演的一般数值求解模式,导出了敏度计算公式,并用共轭梯度法求解,探讨了测点数目、测量误差和变量初值对反演结果的影响,并进行了数值验证.

关键词: 热传导, 多宗量, 反问题, 共轭梯度, 有限元

Abstract: A general numerical model is presented to identify multi_variables,including thermal parameters and boundary conditions for inverse heat conduction problems in transient state.Sensitivity formulas are derived.A conjugate gradient technique is employed.The effects of the number of sample points,the data noise and initial guess on solutions are given.A numerical calculation is performed and discussed.

Key words: heat conduction, multi-variables, inverse problems, conjugate gradient method, finite element

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