[CIG-SHORT] Absorbing - loading BC

[Brad Aagaard]

Farrokh,

The absorbing boundary condition is setup to apply tractions equal to 
the tractions generated by a normally incident P or S wave. Any 
deviations from this due to additional loading BC will reduce the 
effectiveness of the absorbing boundary. Dirichlet BC will result in a 
complete reflection.

The absorbing boundary condition is designed to mimic an infinite 
medium, so it doesn't really make sense to apply a loading BC on those 
boundaries. In dynamic problems, usually we use initial fault tractions 
and/or initial stresses to apply the loading (which may come from a 
separate static or quasi-static problem).

Regards,
Brad


On 11/24/2015 01:15 PM, Farrokh Sheibani wrote:
> Greeting to Pylith developers,
>
> I am trying to have both loading boundary condition and absorbing boundary condition on same location (boundary surfaces in  3D model) and in the same time for a dynamic modeling. I have a buried fault in the model that may slip due to increasing of shear force. I need to keep loading on vertical boundaries to model minimum and maximum horizontal stresses. I was wondering I may have an input form you regarding this issue.
>
>
> Thank you so much in advance!
>
> Best regards,
> Farrokh
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