${T^{″}}_{\text{q0}}$ (s)

0.020

0.025

0.030

0.035

0.040

0.045

Frequency (Hz)

1.198

1.195

1.190

1.191

1.182

1.173

Damping ratio (%)

17.260

17.330

17.199

17.756

18.688

18.955

${T^{″}}_{\text{q0}}$ (s)

0.050

0.055

0.060

0.065

0.070

Frequency (Hz)

1.180

1.175

1.172

1.166

1.186

Damping ratio (%)

17.896

19.287

20.799

21.297

29.204