论文部分内容阅读
为提高冻土温度场的计算效率,实现土体冻结过程中温度场的快捷求解,基于MATLAB PDE工具箱进行了土体冻结瞬态温度场的模拟。通过对模型边界及热传导条件的合理假设,基于模型槽中冻结管的法平面建立平面坐标系,在平面均匀传热的基础上实现了将三维的热源导问题转化为依据冻结管法平面建立的二维平面问题。对比分析了模型槽中各测温点的实测值与模拟值,结果表明:测温点的模拟温度曲线与实测温度曲线变化趋势基本一致,模拟降温速度大于实测降温速度,且靠近模型槽边界的测温点模拟值与实测值误差较大。研究结果可为人工冻结法施工过程中土体冻结瞬态温度场的预测提供参考。
In order to improve the computational efficiency of the temperature field of frozen soil and solve the temperature field in freezing process, a transient temperature field simulation of soil freezing was carried out based on MATLAB PDE toolbox. Based on reasonable assumptions of the model boundary and heat conduction conditions, a planar coordinate system is established based on the normal plane of the frozen tube in the model tank. Based on the uniform heat transfer in the plane, the problem of transforming the three-dimensional heat source guide into a plane based on the freezing tube is established Two-dimensional plane problem. The results show that: the simulation temperature curve at the temperature measurement point and the measured temperature curve are basically the same, the simulation cooling rate is greater than the measured cooling rate, and the model groove near the boundary Temperature measurement point of the simulated value and the measured error. The results can provide reference for the prediction of transient temperature field of soil freezing during the construction of artificial freezing method.