摘要
根据带相变瞬态温度场问题的热量平衡控制微分方程 ,应用Galerkin法推导出了三维有限元计算公式。根据一座已经建成的寒区隧道内的实测大气温度 ,利用三维有限元计算公式 ,计算分析了隧道铺设保温材料和没有铺设保温材料时的温度场。分析表明对隧道进行空间温度场分析是非常必要的 ,保温材料对于减小隧道围岩的冻融范围是有效的。从而 ,为寒区的实际工程设计提供理论依据和计算方法。
Based on the heat equilibrium governing differential equations for the problem of temperature field with phase change instant mode,the finite element formulae of three dimensional temperature fields are derived by Galerkin's method.According to the measured air temperature in a built cold region tunnel,using the three dimensional finite element computation formulae,then the temperature fields of tunnel both with insulation and without insulation,which are installed respectively in built tunnel,are calculated and analyzed.The analytical results show that it is highly necessary to analyze the three dimensional temperature fields in cold region tunnels,and using insulation to decrease the frozen or thawed range of the rock surrounding tunnels is effective.Hence,the paper can provide the theorectical basis and the computational method for practical engineering design of tunnels in cold region.
出处
《土木工程学报》
EI
CSCD
北大核心
2004年第2期47-53,共7页
China Civil Engineering Journal
基金
国家杰出青年科学基金 (40 2 2 50 0 1)
国家自然科学基金项目(40 1 71 0 1 9)
中国科学院"百人计划"资助项目(A类)
关键词
三维温度场
保温材料
数值分析
three dimensional temperature fields
insulation material
numerical analysis
