Pol Grasland-Mongrain edited Simu disp maps.tex  over 8 years ago

Commit id: 38afef1980a37728ea441f916020ff857868a6a2

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To calculate the propagation of the displacement along space and time, we modeled the ablation regime as a point force directed along Z direction with a depth of 40 $\mu$m during 100 $\mu$s and of constant value from -2.5 to 2.5 mm. The magnitude of the force is stored in a matrix $H_z^{abla}(y,z,t)$. Propagation as a shear wave was calculated using Green operators $G_{zz}$ \cite{aki1980quantitative}:  \begin{equation}  G_{zz} G_{zz}(r,\theta,t)  = \frac{\cos^2 \theta}{4\pi \rho c_p^2 r} \delta(t-\frac{r}{c_p}) + \frac{\sin^2 \theta}{4\pi \rho c_s^2 r} \delta(t-\frac{r}{c_s}) \label{eq:Gzz}  \end{equation}  \begin{equation}  + \frac{3\cos^2 \theta-1}{4\pi \rho r^3} \int\limits_{r/c_p}^{r/c_s}{\tau \delta(t-\tau)d\tau}  \label{eq:Gzz2}  \end{equation}  with same notations as in equation \ref{eq:Gyz}.