Dynamic Modeling and Vibration Analysis of Cylindrical Roller Bearings with Local Defects

doi:10.12068/j.issn.1005-3026.2025.20240108

Abstract

Abstract:

To analyze the influence of the raceway groove on the dynamic performance and vibration characteristics of cylindrical roller bearings， the cylindrical roller bearings of the traction motor were taken as the research object， and the shaft current damage model of the cylindrical roller bearings with a corrugated groove was established. Firstly， the additional displacement caused by the local defect of the bearing raceway was described by the piecewise function， and the damage model of the local defect of the bearings was established. Secondly， based on the simplified spring-mass model of cylindrical roller bearings， the bearing dynamic model considering raceway defects was established. Finally， through simulation and experiment， the influence of different damage degrees on bearing vibration characteristics and bearing load distribution was studied， and the reliability of the developed bearing model was determined. The results show that the bearing model effectively reflects the impact excitation and periodic change law caused by shaft current damage. With the increase of local defect damage degree， the vibration response and load distribution fluctuation of the bearings constantly increase， and the rotation of the bearings tends to be unstable.

Key words: cylindrical roller bearing, damage model, local defect, dynamics, vibration response

CLC Number:

TH 133.3

Xiao-peng LI, Xue-dong LI, Bin LIU, Bai-tao LI. Dynamic Modeling and Vibration Analysis of Cylindrical Roller Bearings with Local Defects[J]. Journal of Northeastern University(Natural Science), 2025, 46(11): 73-81.

Figures/Tables 21

Fig.1 Local defects in bearings

Fig.2 Schematic diagram of piecewise function

Fig.3 H1 damage contact diagram

Fig.4 3D model diagram of H1 damage

Fig.5 Schematic diagram of roller and defect location

Fig.6 H3 damage contact diagram

Fig.7 3D model diagram of H3 damage

Fig.8 Bearing model diagram

Table 1 N205EM bearing parameters

参数	符号	单位	数值
外圈外径	D_1o	mm	52
内圈外径	D_1i	mm	34
外圈内径	D_2o	mm	46
内圈内径	D_2i	mm	25
滚子直径	D_b	mm	6
滚子长度	L₁	mm	10
滚子数量	Z	个	13
轴承节圆直径	D_p	mm	40

Fig.9 Vibration response of bearings in X direction

Fig.10 Vibration response of bearings in Y direction

Fig.11 Dynamic response of bearings with different damage widths

Fig.12 Dynamic response of damaged bearings at different rotating speeds

Fig.13 Contact force o f damaged bearings

Fig.14 Influence of damage degree on bearing

Fig.15 Bearing rotor test bench

Fig.16 Bearings’ outer ring fault

Fig.17 Dynamic response of bearings’ outer ring

Fig.18 Dynamic response of bearings’ outer ring

Fig.19 Dynamic response of bearings’ outer ring

Table 2 Experimental error analysis of vibration

工况转速	$f o 仿真$	$f o 实验$	相对误差	$f o 理论$	仿真误差	实验误差
r/min	Hz	Hz	%	Hz	%	%
600	55.20	53.71	2.70	55.25	0.09	2.79
1 200	109.50	106.20	3.01	110.50	0.90	3.89
1 500	136.10	131.84	3.13	138.13	1.47	4.56

Table 2 Experimental error analysis of vibration

工况转速	$f o 仿真$	$f o 实验$	相对误差	$f o 理论$	仿真误差	实验误差
r/min	Hz	Hz	%	Hz	%	%
600	55.20	53.71	2.70	55.25	0.09	2.79
1 200	109.50	106.20	3.01	110.50	0.90	3.89
1 500	136.10	131.84	3.13	138.13	1.47	4.56

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