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CSME 2022/12
Volume 43 No.6
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569-577
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Study of Dynamic Behavior of a Bevel Gear Used in Vertical Axis Wind Turbine
Zghal Bacem a, Belmabrouk Imen a, Abboudi Kamel a, Walha Lassaad a and Haddar Mohamed a
aLaboratory of Mechanics, Modelling and Production (LA2MP), Mechanical Engineering Department, National School of Engineers of Sfax, BP 1173-3038 Sfax, Tunisia
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Abstract:
The challenge of Vertical-Axis Wind Turbines (VAWT) is to extract the maximum power from wind. Therefore, the best modeling should take into account all elements constituting the turbine. In this work, both the dynamic model for one stage straight bevel gear and the aerodynamic model for VAWT are developed. For the first, we developed a lumped-mass dynamic model with 14 degrees of freedom. For the second, the actuator disk theory was used and leads to torque mod-eling. The aim of this study is to analyze the dynamic behavior of VAWT with variable aerodynamic excita-tion in the presence of a gearing system. Thus, the turbine is subject to external and internal excitations. The main factors of these excitations are the variability of the aerodynamic torque and the fluctuation of the gear mesh stiffness. Using the step-by-step time integration method (Newmark algorithm), dynamic equation was resolved. From frequency and time domains, the dynamic response in each bearing shows the persisting influence of gear mesh and wind fluctuation.
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Keywords: Vertical axis wind turbine, Dynamic response, Straight bevel gear system, Aerodynamic torque
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©
2022
CSME , ISSN 0257-9731
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