论文部分内容阅读
为了获得沥青路面微波热再生过程的温度分布规律,根据非稳态导热理论建立了加热区域内的二维传热模型,将加热区域外沥青料简化成4个半无限大固体分别建立了一维传热模型.通过加热水负载实验求解了加热沥青料的辐射电场强度.理论推导出了传热边界条件数学模型,并提出了采用实验数据拟合反求边界条件的方法.通过加热实验测出了沥青混合料的温度并拟合出温度场分布,利用Matlab中的偏微分工具箱对传热模型仿真求解,求得的温度场分布和实验结果相当吻合.研究结果证实了该传热模型具有较高的精度,可以直接计算沥青路面热再生过程中的温度分布.
In order to obtain the temperature distribution law of microwave thermal regeneration process of asphalt pavement, a two-dimensional heat transfer model was established based on the theory of unsteady heat conduction in the heating region. The two-dimensional heat transfer model was simplified to four semi- Heat transfer model.According to the heating water load experiment, the radiated electric field intensity of heating asphalt material was solved.The mathematical model of heat transfer boundary condition was deduced theoretically and the method of fitting the inverse boundary conditions by experimental data was put forward.According to the heating experiment The temperature distribution of asphalt mixture was fitted and the distribution of temperature field was fitted. The heat transfer model was solved by the partial differential tool box in Matlab, and the temperature field distribution was in good agreement with the experimental results. The results show that the heat transfer model has With higher accuracy, the temperature distribution during thermal regeneration of asphalt pavements can be calculated directly.