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Incident waves in Solid Mechanics

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Hi,

I'm trying to implement purely incident elastic waves (p-waves or s-waves) in Solid Mechanics module, but I have trouble to defining a wave that is purely incident.

The boundary condition I'm trying to implement (in Frequency Domain) is:

u_x(x_left, omega) = 2*Ap*exp(i*kp*x_left) - ( 1/i*kp )* dx u_x(x_left, omega)
u_y(x_left, omega) = (- 1/i*ks)*dx u_y(x_left, omega)

where u_x(x_left, omega) and u_y(x_left, omega) is the displacement i x & y-direction on a boundary to the left, Ap is the amplitude, kp and ks are wavenumbers, x_left is the position of left boundary and
dx u_x(x_left, omega) and dx u_y(x_left, omega) are the partial derivatives of displacement components i x & y-direction at the left boundary, with respect to x.

This is a kind of mixed boundary condition and I wonder if there is any way to implement this boundary condition in Solid Mechanics module, or is there any other way to prescribe a purely incident elastic wave?

Kind regards,
Alexey

0 Replies Last Post 5 déc. 2014, 05:49 UTC−5
COMSOL Moderator

Hello Alexey Khlopotin

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