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研究以实测气象资料来预估沥青混凝土路面结构层内温度场的分布状况为目的。通过分析太阳辐射、大气温度两种主要影响参数,运用传热学理论建立沥青混凝土路面二维非稳态温度场解析方程。并在云南大理地区埋设温度传感器进行实时数据采集,对计算模型和实测数据相关关系进行了对比分析。最终在云南省不同温度分区基础上,计算得到不同路表温度的结构内部温度分布曲线。研究结果表明:建立的以太阳辐射和大气温度日变化规律为基础的温度场解析方程模型计算结果与实测结果相比,误差最大3℃左右;温度分布曲线反映出在不同路表温度时,结构内部一定深度内温度分布的规律性和温度梯度的改变趋势,能有效地帮助材料设计,计算结果证明了该模型的合理性和有效性。
The purpose of this study is to predict the distribution of temperature field in asphalt pavement structure by measured meteorological data. By analyzing two main influence parameters of solar radiation and atmospheric temperature, the analytic equation of two-dimensional unsteady temperature field of asphalt concrete pavement is established by using heat transfer theory. And the temperature sensor is embedded in Dali, Yunnan Province for real-time data acquisition. The correlation between the calculated model and the measured data is analyzed. Finally, on the basis of different temperature zones in Yunnan Province, the internal temperature distribution curves of different road surface temperatures are calculated. The results show that the calculated temperature field analytical equation based on the daily variation of solar radiation and atmospheric temperature has a maximum error of about 3 ℃ compared with the measured data. The temperature distribution curve shows that at different road surface temperatures, The regularity of internal temperature distribution and the change trend of temperature gradient within a certain depth can effectively help material design. The calculation results prove the rationality and effectiveness of the model.