Pwave propagation and LABC

[bbb]

Hello,

I am trying to simulate a P-wave propagation.  The amplitude of the wave is 1.35kPa and it travels from the top boundary (2D problem)

I want to include absorbing boundary conditions in all the boundaries, but it seems that I am doing something wrong because there is no homogeneous absorption in all the boundaries. I am using LABC conditions, and I think the mistake can be in the parameters FACTor a, b, or in the definition of the boundaries. Any help?

Please find attached the files.

Thank you so much,

Beatriz.

[Prof. S. Govindjee]

Can you describe the problem you are trying to run?

One quick thing is that the FACTor lines are probably not doing what you want them to.  They should be

Code: [Select]

FACTor SPEEds 1 1In particular you need a second word after factor before giving your two factors.  You can see in the outfile for example that you are not getting 1,1 for material 2, rather you are getting 1,0.

I've also attached a simple 1D, explicit, example with a plot of the output displacements at one node. 

See also http://feap.berkeley.edu/wiki/index.php?title=Lysmer-Kuhlemeyer for another example.