Modal Analysis for a Rod-Fastened Rotor considering Contact Effect Based on Double Fractal Model

Table 3

Flexural stiffness corrections under different pretightening forces.

Contact interface	Gravity bending moment (N·m)	Flexural stiffness correction coefficient, η
		Case 1	Case 2	Case 3	Case 4	Case 5
C2	492	0.3421	0.4286	0.5657	0.6079	0.7522
C3	512	0.3377	0.4276	0.5654	0.6075	0.7520