关键词: 数值模拟, 误差分析, 模型误差, 地下水

Abstract:

Aiming at the problem of underground flow in 2D fissure network, the model error, measuring error and computation error are analyzed. The analytical solution of the 2D underground flow issue was given, and the numerical solution method and its error are further discussed in detail. The computation results show that the error of line element method is smaller than that of FEM, and the method of laying large coefficient is recommended in the solution of large linear equations. The influence of measuring error on the computation results is discussed by taking the fissure width measurement as example. It is pointed out that the accurate geological exploration in early stage is an important guarantee and premise for increasing the accuracy of later numerical simulation.

Key words: numerical simulation, error analysis, error of model;groundwater