考虑热流通道效应的沥青路面温度数据的处理方法研究

Processing Method Research on the Temperature Data in Asphalt Pavement Considering Heat Flow Channel Effect

以温度场实测数据为基础,提出了温度实测数据的处理及拟合方法。路面实测温度沿深度呈散点分布,但在短时间间隔内路面沿深度的升温曲线近似为线性分布。根据导热理论推断温度沿深度的二次导数为深度的一次函数,可以近似用三次曲线拟合路面温度的深度分布;用最小二乘拟合路面温度的深度曲线,发现路面内部存在热流通道,温度高的部位热流大,温度低的位置热流小。最后推荐采用加权最小二乘法拟合路面温度分布。

Based on the measured temperature data, the fitting method for temperature data was proposed. Along the depth measured pavement temperature was scatter, but in short time interval the arising temperature along the depth is approximately linear distribution. According thermal theories postulate ： the second derivation of the pavement temperature distribution along the depth was a function of depth. Pavement temperature can be approximated by a cubic curve. Finally least squares and weighted least squares were used for fitting pavement temperature distribution along depth.