Abstract
This paper investigates the effect of localized faults on the chaotic vibration of rolling element bearings. The presence of chaotic behavior is demonstrated using experimental vibration data. A nonlinear mathematical model is developed that captures bearing dynamics. The numerical simulations of the model agree with the experimental evidence and provide insight into the bearings chaotic response in a wide range of rotational speeds. The bearing chaotic behavior is quantified using the Lyapunov exponent and correlation dimension. It is further shown that these measures can be exploited in detecting bearing failure.
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Abbreviations
- δ i , δ(θ i ):
-
Deformation of ith rolling element
- θ i :
-
Angular position of ith rolling element
- N :
-
Number of rolling elements
- E :
-
Elastic module
- ν :
-
Poisson ratio
- Q :
-
Compressive force in Hertzian deformation
- Γ :
-
Hertzian deformation constant
- D b :
-
Ball diameter
- D m :
-
Pitch diameter
- r i , r o :
-
Inner/outer race groove radius
- R i , R o :
-
Inner/outer race radius
- k c :
-
Coefficient of equivalent nonlinear stiffness
- e :
-
Internal clearance
- l c :
-
Length of roller
- r c :
-
Radius of roller edge
- τ :
-
Time delay
- ε :
-
Scale of covering elements
- dg :
-
Correlation dimension
- N d :
-
Number of digitized data
- C d :
-
Average fraction of points
- α :
-
Vector spacing
- ω r , f r :
-
Shaft rotational speed, frequency
- Q x , Q y :
-
External load
- m :
-
Mass of rotating components
- c :
-
Internal damping of bearing
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Ghafari, S.H., Golnaraghi, F. & Ismail, F. Effect of localized faults on chaotic vibration of rolling element bearings. Nonlinear Dyn 53, 287–301 (2008). https://doi.org/10.1007/s11071-007-9314-2
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DOI: https://doi.org/10.1007/s11071-007-9314-2