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Thermal-fluid-solid coupled dynamic modeling and validation for gear systems
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DOI：10.1016/j.ijmecsci.2025.110010.png)
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Abstract
En 中文
Traditional dynamics (TD) modeling of gear systems assumes smooth surfaces and constant temperature fields, which limits its ability to correlate the dynamic response with surface topography, lubrication conditions, and operating temperature. As a result, it struggles to accurately predict system transmission performance under real service environments. To address these limitations, this work aims to develop an advanced dynamic modeling and numerical solution method that integrates the coupling of fluid, temperature, and solid fields. To efficiently obtain the system temperature field under dynamic loads, a steady-state thermal analysis method for the gearshaft-bearing-housing system using the thermal network model is proposed, which can accurately load friction heat sources onto rough-surface gears under thermal-fluid-solid coupling. The multi-physics coupling of the dynamics model is achieved through the interaction of the friction coefficient, temperature distribution, and load distribution. Furthermore, a combined method of static parameter calculation and dynamic force iterative computation is introduced to enable rapid calculation of dynamic responses. The effectiveness of the proposed model is proven through comparisons with several experiments and traditional models. The analysis reveals that the temperature distribution depends on the multi-parameter competitive mechanism. The friction slightly impacts dynamic transmission error (DTE), but together with bearing nonlinearity, it increases vibration acceleration at low and high speeds, while thermal effects reduce resonance speed and vibration amplitude. This work offers theoretical guidance for understanding multi-physics coupling mechanisms and accurate modeling of gear system dynamics.
Keywords:
Gear transmission system
Thermal-fluid-solid coupling
System temperature field
Dynamics modeling
Multi-physics coupled behaviors
Journal
IF:
9.4
Papers:
1.0W
Citations:
4.5W