【毕设用---外文翻译来源】ANSYS英文论文 (47).pdf

Numerical Modeling of Nonstationary Free Surface Flow
in Embankment Dams
Jiří Kratochvíl
Brno University of Technology, CZ
Tibor Bachorec
SVS FEM Brno, CZ
Abstract
One of the main causes of embankment dam failures is the destabilizing effect of seepage forces of the
infiltrating water during floods. A mathematical model describing the process of nonstationary free surface
flow of water through the embankment dam and its foundation was proposed and verified by laboratory
experiments. The existence of the analogy between seepage and heat diffusion made it possible to analyze
the hydraulic problem with ANSYS/THERMAL. The application of ANSYS/THERMAL with some
mendations and the examples of numerical results are presented and described in detail.
Introduction
Sudden changes of water level in the river during the flood produce nonstationary flow of the infiltrating
water in the body of the embankment dam and its foundations. The flood strongly influences the local and
global stability of the dam and produces the existence of the potential risk of its failure with the subsequent
total destruction due to the internal erosion and the loss of the shear strength of the soil material.
To minimize the risk of the possible destruction of the dam it is necessary to analyze in detail the velocity,
pressure, piezometric head and its gradient fields in