用边界单元法模拟二维地温场的地形影响

MODELING 2-D TEKRAIN EFFECT ON GEOTHERMAL FIELD BY THE BOUNDARY ELEMENT METHOD

地形对地温场产生影响。在地形起伏较大地区，热流的实例值必须校正。本文用边界单元法模拟二维地温场的地形影响。与有限单元法比较，边界单元法具有单元剖分简单、剖分后的地形与实际地形拟合度高的优点。本文的计算结果与解析解、有限单元法的结果符合。

Terrain has a influence on geothermal field. In region of larger relief , the observed value of geothermal flow must be corrected for terrain. The bounbary element method is used to model 2-D terrain effect on geothermal field in this paper. Compared with the finite element method ,the BEM is simpler in element divi-sion and the corifiguration of terrain divided by the BEM is more corisistent with the practical terrain. The re-sion and the configuration of terrain divided by the BEM is more consistent with the practical terrain. The re-sults of calculation agree with those obtained by analytic method and the FEM.