DETERMINING THE NUMERICAL VALUES OF THE POTENTIAL AT THE MEASURING POINTS

Abstract

In order to calibrate material parameters, a comparison of experimentally measured values and numerically predicted values is necessary. With complex FEM models, it is often impossible to create a mesh where the node of the element coincides with the position of the measuring point. The paper presents the procedure for determining the numerical values of the potential at the location of the measuring point. The first step is determining the element in which the measuring point is located and calculating the local coordinates of the measuring point in the element. The program (PAK-V) loads a file that contains the label of the measuring point, the element in which the measuring point is located and the local coordinates. Numerical values at the measuring points are calculated based on the nodal values of the element and the local coordinates. These extrapolated values are afterwards printed in a separate file for easier comparison with the measured values. After several iterations material parameters are obtained that accurately simulate geomechanical properties of a dam surroundings, facilitating structural analysis.