9. Analysis of the results

In this chapter we will provide a critical analysis on the capacity to absorb elastic waves according to the modeling chosen. To do this, we will impose the Ricker wavelet for a long enough time to see a possible parasitic reflection in the center of the elastic bar (point \(A\) in v2.03.201-Geom1).

In v2.03.201-Abso_Compa we test the ability of absorbent boundary elements to attenuate elastic waves without generating parasitic waves. It can be seen that in the case of an orthogonal incident the efficiency is maximum (modeling A) while in the case of a non-orthogonal incidence the efficiency degrades by generating a non-negligible reflection wave (modeling B).

In v2.03.201-CALM_Compa we test the ability of the CALM method to attenuate elastic waves without generating parasitic waves. We can see that in the case of an orthogonal incident the efficiency is maximum (modeling C) but also in the case of a non-orthogonal incidence the efficiency does not decrease (modeling D). No stray waves are generated.

In v2.03.201-CALM_Conde we test the possibility of imposing a plane wave via an absorbent border with a layer CALM that absorbs the plane wave (modeling E) and we compare ourselves to the same modeling by adding the condensation of the layer CALM (modeling F). The results are the same. Note that the wave is reflected by the edge BC and is then absorbed by the layer CALM.