Eigenvalue Examples
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3D_OILDRUM.PDE
Shows a 3D eigenvalue calculation, the vibrational modes of the air in an oildrum.

3D_PLATE.PDE
Vibrational modes of a free glass plate.

DRUMHEAD.PDE
Vibrational modes of a circular drumhead.

SHIFTGUIDE.PDE
Demonstrates the technique of eigenvalue shifting, using a variation of WAVEGUIDE.PDE. Compare these results to modes 10-16 of WAVEGUIDE20.PDE.

VIBAR.PDE
Vibrational modes of a metal bar clamped at one end. This problem analyzes the same structure as "Samples|Time_Dependent|Stress|Vibrate.pde" and "Samples|Time_Dependent|Stress|Harmonic.pde".

WAVEGUIDE.PDE
Transverse-Electric modes of a microwave waveguide.

WAVEGUIDE20.PDE
Transverse-Electric modes of a microwave waveguide. This is the same as WAVEGUIDE.PDE, except that it calculates 20 modes for comparison with the shifted eigenvalues of SHIFTGUIDE.PDE.