Abstract
The present Note describes instabilities observed in the use of numerical simulations for recovering the elastic constants of anisotropic solids when only bulk quasi-longitudinal (qL) velocities are taken into account. Both 2-D and 3-D versions of the simulation are discussed, and a number of numerical examples are presented. The influence of the angular range of the data, the density of the simulated data, as well as the addition of a few transverse wavespeeds are discussed in some detail. Some practical implications related to laser generation experiments are pointed out.
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