摘要
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。
In the conventional calculation for the thermal field analysis of frozen soil subgrade,only the first heat boundary conditions are considered, whereas the second and third boundary conditions such as radiation, convection, wind speed,evaporation, etc. are ignored. In order to gain more accurate results of the subgrade temperature, this paper takes all above factors into account and presents a finite element method in which the first, second and third heat boundary conditions can be considered, meanwhile, this paper gives formulas to simulate every field factor. The results calculated by this method agree well with actual field measurements, which shows this method is correct and effective to analyze the thermal field of the frozen soil subgrade.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2000年第4期8-11,共4页
China Journal of Highway and Transport
关键词
冻土路基
有限元法
温度场
frozen soil embankment
finite element method
temperature field
