路面温度场的数值解及几个关键问题探讨

Numerical Solution to Pavement Temperature Fields and Discussion on Several Key Issues

摘要:

利用有限差分法，研究了不同边界条件下路面温度场有限差分解的收敛性及网格的合理划分；分析了将路面结构温度场求解简化为半无限体热传导问题的可行性及误差、路表与天空相互辐射中路表温度和天空有效温度作一阶泰勒近似所引起的偏差；讨论了天空有效温度的估计偏差对路面温度场的影响，以及路面初始温度值偏差的消散时间.

Abstract:

Based on the finite difference method,a study was made of the convergences and meshing technique for pavement temperature field in different boundary conditions.Also an analysis was made of the feasibility and calculating error for pavement temperature field in a multi-layered system being simplified to a homogeneous semi-infinite body,the error between the first order Taylor approximation of pavement surface temperature,sky effective temperature due to mutual radicalization in pavement surface and sky and actual temperature.The influence of the estimated error for sky effective temperature on pavement temperature field and the dispersing time of initial temperature error were discussed.