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摘 要： 由于新型足尺加速加载试验系统的规模较大，对空气温度、路面温度和路基温度的精确控制是环境模拟控制系统的设计难点。而国内外相关资料均比较少，因此采用数值模拟的方法为实验系统的搭建提供必要的理论依据和数据支持是十分必要的。本文利用Fluent软件，对新型足尺加速加载试验系统的子系统-多年冻土模拟系统进行了数值模拟计算，得出了不同制冷管间距下的路基内部温度场分布，温度达标时间，总制冷量的变化情况，并根据数值模拟的结果确定了与路基材料无关的几项设计参数。通过数值模拟计算研究，为新型足尺加速加载试验环境系统的搭建以及运行提供了数据支持。 关键词 ：足尺加速加载系统；冻土路基；路基材料；数值模拟；温度场分布 Numerical Simulation of Temperature Field of Roadbed of Full Size Accelerated Loading System Abstract : Because of the large size of the New Type Accelerated Loading System, the accurate simulation of air temperature, road temperature and roadbed temperature are the key points and also difficult points for the system. As there are few reference data, numerical simulation can provide some data which are very important for designing and running the system. By using the software FLUENT, numerical simulations for everfrost are done, and the temperature field inside the roadbed, total working time and total refrigerating capacity under different pipe pitch are carried out. Some design parameters which are not related to the materials of the roadbed are concluded. So by using the numerical simulation, some design parameters and operational parameters are provided. Keywords: Full Scale Accelerated Loading System, Frozen Soil Roadbed, Road Material, Numerical Simulation, Temperature Field