核废物地质处置THM耦合三维有限元分析

3D Model and FEM Analysis for Coupled Thermo-Hydro-Mechanical Processes in Geological Disposal of Nuclear Waste

笔者将所建立的热—水—应力耦合模型及开发的有限元程序由二维分析拓展到三维分析,并从方法论研究的角度,以一个简单的核废物地质处置模型为算例进行热—水—应力耦合过程的三维数值模拟,考察了近场的温度、饱和度、孔隙水压力、位移、正应力、流速等的分布与变化,认为计算结果符合规律,从而初步对程序的正确性作出了肯定的评价。

In this paper, the relative FEM program suggested by the author and a 2D analysis is developed in to 3D analysis for the coupled thermo - hydro - mechanical model. From a viewpoint of the methodology study, a 3D numerical simulation is carried out for the coupled thermo - hydro - mechanical processes in a simple model of geological disposal of nuclear waste, which is taken as the computation example. The distributions and changes of the temperatures, the saturations degree, pore pressures, displacements, normal stresses and flow velocities in the near field are investigated. It is considered that the computation results are in keeping with the regular pattern. So the affirmatire evaluation is given for the rightness of the program preliminarily.