Mode

Eigenvalue

Frequency

Damping Ratio

1

−2.8678 ± j12.5399

1.9958

0.2229

2

−2.8408 ± j12.4357

1.9792

0.2227

5

−2.0541 ± j11.2477

1.7901

0.1797

8

−1.8596 ± j10.0745

1.6034

0.1815

12

−1.0328 ± j9.2090

1.4657

0.1115

13

−0.5422 ± j8.9655

1.4269

0.0604

16

−0.2882 ± j8.5879

1.3668

0.0335

23

−1.4994 ± j2.9944

0.4766

0.4477