Table 3: First-order frequencies of the EPSB under different eccentricities.

Eccentricity
(mm)
Theoretical Value
(Hz)
Change Rate
(%)
Simulated Value
(Hz)
Change Rate
(%)
Error
(%)
0 47.97 47.92 0.10
30 48.21 0.49 48.48 1.17 -0.57
50 48.62 1.34 49.30 2.87 -1.38
70 49.23 2.61 50.10 4.55 -1.74
90 50.04 4.29 50.64 5.67 -1.19
110 51.03 5.99 51.87 8.23 -1.62