${T^{″}}_{\text{q0}}$ (s)

0.020

0.025

0.030

0.035

0.040

0.045

Frequency (Hz)

1.3088

1.3080

1.3072

1.3066

1.3060

1.3054

Damping ratio (%)

5.53

5.57

5.60

5.64

5.68

5.71

${T^{″}}_{\text{q0}}$ (s)

0.050

0.055

0.060

0.065

0.070

Frequency (Hz)

1.3049

1.3044

1.3039

1.3035

1.3032

Damping ratio (%)

5.75

5.79

5.82

5.85

5.89