Table 2 Parameters of structure, material, and working conditions

Inner radius \(R_{1}\) (mm)

43

Outer radius \(R_{2}\) (mm)

61.5

Root mean square of roughness of FP \(\sigma_{1}\) (μm)

5.975

Root mean square of roughness of SD \(\sigma_{2}\) (μm)

2.85

Fractal dimension of FP D

1.54

Scale factor of FP G

1.584 × 10⁻¹¹

Coefficient of effective area \(\psi\)

0.78

Angular velocity of FP \(\omega_{1}\) (\({\text{rad/s}}\))

104.7

Angular velocity of SD \(\omega_{2}\) (\({\text{rad/s}}\))

0

Dynamic viscosity of oil \(\mu\) (\({\text{Pa}}\cdot{\text{s}}\))

0.055

Peak density of the rough surface \(\eta_{p}\) (m⁻²)

\(8.49 \times 10^{7}\)

Curvature radius of asperity peak \(R_{p}\) (m)

\(8 \times 10^{ - 4}\)

Equivalent elastic modulus of FP E (GPa)

2.176

Compressive strength of FP (MPa)

110

Hardness of FP H (N/mm²)

50