Dynamic Characteristics Analysis of the Coupled Lateral-Torsional Vibration with Spur Gear System

Table 1

Structure and dynamics parameters of spur gear rotor bearing system.

Gear parameters
Number of teeth		100
		25
Mass (kg)		667.8
		141.1
Inertia (kg⋅m^2)		44.4
		0.207
Modulus		8
Eccentricity		2.0 × 10^−6
		2.0 × 10^−5
Mesh stiffness		6.0 × 10^8
Damping ratio		0.1
Transmission error
Mean		2 × 10^−5
Amplitude		3 × 10^−5
Angular speed		2000
Shaft parameters
Bending stiffness		2.5 × 10^8
		1.6 × 10^7
Damping ratio		0.07
Torsional stiffness		4.3 × 10^8
		2.5 × 10^7
Damping ratio		0.07
Input/output parameters
Rotational inertia		17.8
		5.3
Speed (r/min)		500
		2000
Gear on the shaft position	,
Bearing parameters
Lumped mass	,	115.2
	,	73.2
Bearing stiffness	,	6.0 × 10^10
	,	2.0 × 10^10
Damping ratio		0.01
Bearing contact stiffness		13 × 10^9
		10 × 10^9
Number of bearing rolling balls		14
		10
Bearing 1 radius (m)		0.25
		0.2
Bearing 2 radius (m)		0.125
		0.1
Bearing clearance (m)		2 × 10^−7
		5 × 10^−7