Improved modeling of equivalent static loads on wind turbine towers

Kuangmin Gong, Xinzhong Chen

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

This study presents a dynamic response analysis of operational and parked wind turbines in order to gain better understanding of the roles of wind loads on turbine blades and tower in the generation of turbine response. The results show that the wind load on the tower has a negligible effect on the blade responses of both operational and parked turbines. Its effect on the tower response is also negligible for operational turbine, but is significant for parked turbine. The tower extreme responses due to the wind loads on blades and tower of parked turbine can be estimated separately and then combined for the estimation of total tower extreme response. In current wind turbine design practice, the tower extreme response due to the wind loads on blades is often represented as a static response under an equivalent static load in terms of a concentrated force and a moment at the tower top. This study presents an improved equivalent static load model with additional distributed inertial force on tower, and introduces the square-root-of-sum-square combination rule, which is shown to provide a better prediction of tower extreme response.

Original languageEnglish
Pages (from-to)609-622
Number of pages14
JournalWind and Structures, An International Journal
Volume20
Issue number5
DOIs
StatePublished - May 1 2015

Keywords

  • Combination rule
  • Equivalent static loads
  • Extreme response
  • Wind loading
  • Wind turbine

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