### 6.2 Undamped dynamic problem (cont'd)

The eigenvalues of $$\mathbf K \mathbf u = \omega^2 \mathbf M \mathbf u$$ correspond to the squares of the natural frequencies, and the eigenvectors correspond to the associated modes of vibration.

Note the two degenerate modes at 6.446 kHz.

R. Funnell