Title: Effects of sliding friction on wind turbine drivetrain in presence of varying gear tooth crack under constant wind load

Authors: Rishi Kumar; Sankar Kumar Roy

Addresses: Shah and Anchor Kutchhi Engineering College, Mahavir Education Trust's Chowk, Waman Tukaram Patil Marg, Chembur, Mumbai, Maharashtra, 400088, India ' National Institute of Technology Jamshedpur, Adityapur, Jamshedpur, Jharkhand, 831014, India

Abstract: Dynamic modelling is an important technique in condition monitoring. There are one planetary and two parallel gear trains in wind turbine drivetrain system (WTDS). Sun gear is meshing with three planets in planetary stage, it experiences fatigue loading, so likely to fail due to crack propagation. Contacting tooth profiles in drivetrain also experience resistance during operation due to sliding friction. A mathematical model based on Lagrange's formulation and lumped parameter model is developed to study the dynamic behaviour of WTDS for variable tooth root crack depths of sun gear under friction. Time varying stiffness of meshing gears and mesh phasing in planetary gear are taken into account in the model. Analytically estimated stiffness indicates quantified reduction due to varying cracks. Dynamic analysis is performed in frequency domain. Modulation effects are observed in gear mesh frequency and its harmonics due to natural frequency, defect frequency in presence of friction for the WTDS using FFT.

Keywords: dynamic modelling; wind turbine; time varying mesh stiffness; mesh phasing; varying tooth crack; sliding friction.

DOI: 10.1504/IJMIC.2024.144038

International Journal of Modelling, Identification and Control, 2024 Vol.45 No.4, pp.272 - 285

Received: 29 Apr 2024
Accepted: 11 Nov 2024
Published online: 21 Jan 2025 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article