TY - JOUR
T1 - A numerical investigation of effects of defect edge discontinuities on contact forces and vibrations for a defective roller bearing
AU - Liu, Jing
AU - Shao, Yimin
N1 - Publisher Copyright:
© IMechE 2015.
PY - 2016/12
Y1 - 2016/12
N2 - Vibration characteristics of a roller bearing caused by a roller passing over the defect on the races are determined by the contact forces between the roller and races of the bearing. The vibration characteristics and contact forces are determined by the sizes and edge discontinuities of the defect. Therefore, it is very useful to investigate the relationships between defect edge discontinuities and the contact forces, and those between defect edge discontinuities and the vibrations for diagnosing the defects with different edge discontinuities in the roller bearings. A dynamic nonlinear finite element model for a roller bearing with a localized surface defect considering different edge discontinuities on its outer race is developed using an explicit dynamics finite element software package in this work. The effects of the defect edge discontinuities, radial load, and shaft speed on the contact force between the roller and outer race of the roller bearing are investigated, as well as the vibrations of the bearing. In-depth analyses of the contact forces between the roller and localized surface defect with different edge discontinuities are presented, which did not study in the previous literatures. The numerical results show that the number of the impacts between the roller and end edge of the defect caused by the re-stressing is more than that between the roller and beginning edge of the defect caused by the de-stressing, which is also affected by the defect edge discontinuities.
AB - Vibration characteristics of a roller bearing caused by a roller passing over the defect on the races are determined by the contact forces between the roller and races of the bearing. The vibration characteristics and contact forces are determined by the sizes and edge discontinuities of the defect. Therefore, it is very useful to investigate the relationships between defect edge discontinuities and the contact forces, and those between defect edge discontinuities and the vibrations for diagnosing the defects with different edge discontinuities in the roller bearings. A dynamic nonlinear finite element model for a roller bearing with a localized surface defect considering different edge discontinuities on its outer race is developed using an explicit dynamics finite element software package in this work. The effects of the defect edge discontinuities, radial load, and shaft speed on the contact force between the roller and outer race of the roller bearing are investigated, as well as the vibrations of the bearing. In-depth analyses of the contact forces between the roller and localized surface defect with different edge discontinuities are presented, which did not study in the previous literatures. The numerical results show that the number of the impacts between the roller and end edge of the defect caused by the re-stressing is more than that between the roller and beginning edge of the defect caused by the de-stressing, which is also affected by the defect edge discontinuities.
KW - contact forces
KW - edge discontinuities
KW - localized surface defect
KW - Roller bearings
KW - vibrations
UR - http://www.scopus.com/inward/record.url?scp=85185407987&partnerID=8YFLogxK
U2 - 10.1177/1464419315615451
DO - 10.1177/1464419315615451
M3 - 文章
AN - SCOPUS:85185407987
SN - 1464-4193
VL - 230
SP - 387
EP - 400
JO - Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics
JF - Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics
IS - 4
ER -