###
DOI:
工程科学与技术:2011,43(6):98-104
←前一篇   |   后一篇→
本文二维码信息
码上扫一扫!
考虑冻土相变的非稳定温度场-渗流场耦合有限元分析研究
(河海大学 水利水电学院)
FEM Analysis Research on Unsteady Temperature-seepage Coupling System of Frozen Soil Phase Changing
(College of Water Conservancy and Hydropower,Hohai Univ)
摘要
图/表
参考文献
相似文献
本文已被:浏览 2113次   下载 6
投稿时间:2011-06-22    修订日期:2011-09-26
中文摘要: 对冻土相变时非稳定温度场-渗流场耦合的有限元计算方法进行改进,根据土壤冻结特征曲线计算和修正孔隙含冰量,同时提出了未冻土体积含水量对温度导数的修正方法和加速迭代收敛速度的新方法,消除了冻土温度场-渗流场耦合计算中出现的数值振荡现象,加快迭代收敛速度,使其能够适用复杂多变边界条件下土体的冻结、融化计算。最后通过两个数值算例用此方法与试验值进行对比分析,验证了本文方法的可靠性和有效性。
中文关键词: 冻土  相变  孔隙含冰量  加速收敛
Abstract:Considering the change of frozen soil phase, the finite element method of unsteady temperature field-seepage field coupled problem was improved. According to the soil freezing characteristic curve, the pore ice containing volume was calculated and fixed. At the same time, a correction method of temperature derivate unfrozen soil’s water volume, and a new method accelerating the convergence speed were put forward, to eliminate the numerical oscillation phenomena that appears in the frozen soil’s temperature field-seepage field coupling calculation, and accelerate the convergence speed. Finally,two numerical examples were compared with the experiments to verify the reliability and effectiveness of the method.
文章编号:201100603     中图分类号:    文献标志码:
基金项目:国家“十一五”科技支撑计划资助项目(2008BAC47B02)
作者简介:
引用文本:
郭利娜,李同春,刘晓青,牛志伟.考虑冻土相变的非稳定温度场-渗流场耦合有限元分析研究[J].工程科学与技术,2011,43(6):98-104.
Guo Lina,Li Tongchun,Liu Xiaoqing,Niu Zhiwei.FEM Analysis Research on Unsteady Temperature-seepage Coupling System of Frozen Soil Phase Changing[J].Advanced Engineering Sciences,2011,43(6):98-104.