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蜂窝夹心结构等效导热系数反演的边界单元法

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Indexed by:期刊论文

Date of Publication:2011-04-15

Journal:计算力学学报

Included Journals:PKU、ISTIC

Issue:z1

Page Number:126-130

ISSN No.:1007-4708

Key Words:边界单元法;径向基函数;径向积分法;等效导热系数;蜂窝夹心

Abstract:对蜂窝夹心结构的等效导热系数进行反演,对于热防护系统的优化设计具有重要意义。本文应用高斯定理、径向基函数和径向积分法,推导了各向异性材料稳态热传导方程的边界单元表达式;应用Newton-Raphson迭代法和复变量求导法,对蜂窝夹心结构等效导热系数进行反演。分别应用形函数、高斯积分和径向基函数插值,对蜂窝夹心结构的边界条件进行等效处理。通过对由4个胞元组成的蜂窝夹心结构的等效导热系数进行反演,验证算法的可靠性。所做工作可将蜂窝夹心结构的复杂多区域问题简化为单区域问题,为求解多胞元蜂窝夹心结构的传热问题创造了较有利条件。

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