论文部分内容阅读
冻土路基温度场的有限元计算 ,目前基本上限于考虑第一类边界 ,即根据经验公式计算出地表温度进行计算 ,对辐射、换热、蒸发等第二、三类边界条件尚不考虑。通过综合考虑路基走向、风速、辐射、蒸发等多种因素 ,提出了在一、二、三类边界条件下考虑诸多因素的有限元计算方法 ,给出了相应计算公式。计算结果与实测资料比较一致 ,说明本文方法是正确的。从而实现了冻土温度场有限元计算中能够如实地考虑各种外部因素
At present, the finite element calculation of temperature field of permafrost embankment is basically limited to considering the first type of boundary. That is, the surface temperature is calculated based on empirical formula. The second and third boundary conditions such as radiation, heat exchange and evaporation are not considered. Through comprehensive consideration of factors such as embankment strike, wind speed, radiation and evaporation, the finite element method considering many factors under the first, second and third boundary conditions is proposed and the corresponding formulas are given. The calculated results are in good agreement with the measured data, which shows that the method in this paper is correct. Thus, various external factors can be faithfully considered in the finite element calculation of the temperature field of permafrost