Abstract
Thermal effect is a crucial factor leading to failure of gear system. However, the lack of comprehensive nonlinear dynamics model limits the further study of thermal effects. The constitutive relation of beam element considering steady-state temperature is reconstructed, and thermal node load is formulated. Considering the influences of thermal expansion and temperature on material properties, a more comprehensive dynamic model of gear-rotor-bearing system is established based on the finite element node method. Nonlinear friction, high-speed gyroscopic effect, thermal-related time-varying meshing stiffness (TVMS) and thermal backlash are included in the model. The effects of temperature and bearing type on the vibration response of gear system are analyzed. The results show that the system motion changes from period to chaos with the temperature increase in part of the speed range. The appropriate backlash could restrain the chaotic motion caused by temperature rise. Moreover, the temperature significantly increases the axial bearing force, and the appropriate bearing could reduce the axial displacement. This research can further understand the influence of temperature on the dynamic response of gear system and guide the design of gear system.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
Abbreviations
- A :
-
Beam sectional area
- a :
-
Coefficient of linear expansion
- B :
-
Transformation matrix between strain vector and displacement vector
- B :
-
Tooth face width
- b, b * :
-
Half of the backlash and the thermal backlash
- D :
-
Transformation matrix between strain matrix and stress matrix
- E * :
-
Elastic modulus obtaining by fitting the values at different temperatures
- e(t):
-
Static transmission error
- F T :
-
Thermal node load
- G * :
-
Shear modulus obtaining by fitting the values at different temperatures
- I s :
-
Second area moment of inertia
- k h, k a, k b, k s, k f :
-
Non-linear Hertzian contact stiffness, axial compressive stiffness, bending stiffness, shear stiffness and fillet-foundation stiffness
- k m *, c m :
-
Thermal TVMS and damping
- K * :
-
Thermal related time-varying meshing stiffness
- l :
-
Length of the beam element
- N :
-
Shape function matrix of beam element
- r, r b, r k :
-
Dividing circle radius, base circle radius and radius of meshing point
- s:
-
Tooth thickness
- T 2 :
-
Torque applied to the output shaft
- U:
-
Total potential energy of linear elastic solids
- Z p,g :
-
Teeth number of the driving wheel and driven wheel
- M, G, K, F, q :
-
Mass, gyroscopic, stiffness, load and displacement matrix. (Superscript d, g, e, b and s denote rigid rotor, gear, shaft , bearing and assemble model)
- \(\alpha , \alpha _k\) :
-
Pressure angle and pressure angle at point k
- \(\Delta ej(j=p, g)\) :
-
Thermal profile error of the driving wheel and driven wheel
- \(\Delta T\) :
-
Amount of temperature change
- \(\delta , \delta _m\) :
-
Dynamic transmission error and dynamic deformation along the meshing line
- \(\varepsilon \) :
-
Strain matrix
- \(\gamma _{m0}, \gamma _{m1}\) :
-
Backlash functions
- \(\lambda \) :
-
Thermal expansion coefficient
- \(\varvec{\sigma }\) :
-
Stress matrix
- \(\Omega \) :
-
Spin speed of the gear rotor
- \(\xi _i (i=1,2)\) :
-
Correction coefficient of the fillet-foundation stiffness of tooth pair i
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Acknowledgements
This work is supported by the National Key R&D Program of China through Grant No. 2020YFB2008200 and the National Natural Science Foundation of China (NSFC) through Grant No. 52005515. The authors also gratefully acknowledge the supports of the Project of State Key Laboratory of High Performance Complex Manufacturing, Central South University, through Grant No. ZZYJKT2021-06.
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Sun, Z., Chen, S., Hu, Z. et al. Vibration response analysis of a gear-rotor-bearing system considering steady-state temperature. Nonlinear Dyn 107, 477–493 (2022). https://doi.org/10.1007/s11071-021-07024-8
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DOI: https://doi.org/10.1007/s11071-021-07024-8