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Subject: Re: Acoustic wave propagation in thin plates
Date: Fri, 21 Nov 2008 19:01:51 +0000 (UTC)
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"Matt Fig" <spamanon@yahoo.com> wrote in message <gg6v2i$hsh$1@fred.mathworks.com>...
> The classic book by Graff has theoretical results for waves in plates and shells, including Lamb waves if I remember correctly.
> Also, you don't describe the boundary conditions of interst, but I have written a Matlab program that may be useful to you if you want to explore the eigenvalue problem.
> 
> http://www.mathworks.com/matlabcentral/fileexchange/11399
> 
> Good luck.

Thank you!

I will check out your program first, and see if it can help me.

The boundary conditions are (dp/dx)=0 at x=0 and x=Lx (the x size of the plate), and then similarly for the other derivatives. p is p(x,y,z,t), i.e. the pressure wave. 

I then assume the initial condition p(x,y,z,0) = dirac(x-x0)dirac(y-y0)dirac(z-z0), i.e. a unit impulse at some location (x0,y0,z0). dp/dt at time t=0 is assumed to be zero.

/JC