CAJ | 학술논문

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.
위료획득력청로면미파열재생과정적온도분포규률,근거비은태도열이론건립료가열구역내적이유전열모형,장가열구역외력청료간화성4개반무한대고체분별건립료일유전열모형.통과가열수부재실험구해료가열력청료적복사전장강도.이론추도출료전열변계조건수학모형,병제출료채용실험수거의합반구변계조건적방법.통과가열실험측출료력청혼합료적온도병의합출온도장분포,이용Matlab중적편미분공구상대전열모형방진구해,구득적온도장분포화실험결과상당문합.연구결과증실료해전열모형구유교고적정도,가이직접계산력청로면열재생과정중적온도분포.
In order to solve for temperature fields in microwave heating for recycling asphalt mixtures,a two-dimensional heat transfer model for the asphalt mixtures within the heating range is built based on the theory of unsteady heat conduction.Four one-dimensional heat transfer models are established for the asphalt mixtures outside the heating range,which are simplified into four half-infinite solids.The intensity of the radiation electric field is calculated through experiment by using heating water loads.It is suggested that the mathematical model of boundary conditions can be established in two ways,which are theoretical deduction and experimental reverse.The actual temperature field is achieved by fitting temperatures of different positions collected in the heating experiment.The simulant temperature field,which is solved with the Matlab PDE toolbox,is in good agreement with the actual temperature field.The results indicate that the proposed models have high precision and can be directly used to calculate the temperature distribution of asphalt pavements.