Why PEM disappears when solving for coupled modes ?
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VA One
Vibro-Acoustics
by Emna Ben Ali
|9 March 2017
PEM subsystems are nodal, whereas acoustic and structural ss are modal. The PEM ss adds to the global dynamic stiffness matrix, just as any SEA etc objects; so the PEM ss is taken into account when solving for the coupled mode.
But one won't be able to visualize any modes, as there is no modal data for PEM ss, (same in coupled/uncoupled modes).
But one won't be able to visualize any modes, as there is no modal data for PEM ss, (same in coupled/uncoupled modes).