Coupled dynamic characteristics of wind turbine gearbox driven by ring gear considering gravity

Aiqiang Zhang, Jing Wei, Datong Qin, Shaoshuai Hou, Teik C. Lim

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Gravity is usually neglected in the dynamic modeling and analysis of the transmission system, especially in some relatively lightweight equipment. The weight of wind turbine gearbox is up to tens of tons or even hundreds of tons, and the effects of gravity have not been explored and quantified. In order to obtain accurate vibration response predictions to understand the coupled dynamic characteristics of the wind turbine gear transmission system, a comprehensive, fully coupled, dynamic model is established by the node finite element method with gravity considered. Both time-domain and frequency-domain dynamic responses are calculated using the precise integration method with various excitations being taken into account. The results indicate that gravity has a significant impact on the vibration equilibrium position of central floating components, but the changing trends are different. Gravity does not change the composition of the excitation frequency, but will have a certain impact on the distribution ratio of the frequency components. And the high frequency vibrations are hardly affected by gravity. In addition, the load sharing coefficient is greater when gravity is taken into account, both of internal gearing and of external gearing system. When the planet gears have a certain position error in accordance with certain rules, the load sharing performance of the system will be better.

Original languageEnglish (US)
Article number091009
JournalJournal of Dynamic Systems, Measurement and Control, Transactions of the ASME
Issue number9
StatePublished - Sep 2018
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Information Systems
  • Instrumentation
  • Mechanical Engineering
  • Computer Science Applications


  • Dynamic characteristics
  • Gravity
  • Load sharing
  • Node finite element method


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