Understanding the dynamic coupling of wind turbine tower and blades

Kuangmin Gong, Xinzhong Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study presents an eigenvalue analysis of wind turbine system to determine modal frequencies, damping ratios and mode coupling at various wind speeds and to seek potential flutter instability. A comprehensive dynamic response analysis is also performed with different considerations of wind loads on turbine blades and tower. The results show that wind load on tower has a negligible effect on blade response of both operational and parked turbines, and on tower response of operational turbine, but has a significant influence on tower response of parked turbine. The tower extreme responses due to wind loads on blades and tower can be estimated separately and then combined for the estimation of total extreme response. In current wind turbine design practice, the tower extreme response due to wind loads on blades is often calculated using an equivalent static load modeling in terms of concentrated force and moment at the tower top. The combinations of the tower extreme responses are implemented under the assumption of full correlation. 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 are proved to provide a better prediction of tower response.

Original languageEnglish
Title of host publication12th Americas Conference on Wind Engineering 2013, ACWE 2013
Subtitle of host publicationWind Effects on Structures, Communities, and Energy Generation
Pages528-542
Number of pages15
StatePublished - 2013
Event12th Americas Conference on Wind Engineering 2013: Wind Effects on Structures, Communities, and Energy Generation, ACWE 2013 - Seattle, WA, United States
Duration: Jun 16 2013Jun 20 2013

Publication series

Name12th Americas Conference on Wind Engineering 2013, ACWE 2013: Wind Effects on Structures, Communities, and Energy Generation
Volume1

Conference

Conference12th Americas Conference on Wind Engineering 2013: Wind Effects on Structures, Communities, and Energy Generation, ACWE 2013
CountryUnited States
CitySeattle, WA
Period06/16/1306/20/13

Keywords

  • Combination rule
  • Eigenvalue analysis
  • Equivalent static loads
  • Flutter instability
  • Mode coupling
  • Wind turbine

Fingerprint Dive into the research topics of 'Understanding the dynamic coupling of wind turbine tower and blades'. Together they form a unique fingerprint.

  • Cite this

    Gong, K., & Chen, X. (2013). Understanding the dynamic coupling of wind turbine tower and blades. In 12th Americas Conference on Wind Engineering 2013, ACWE 2013: Wind Effects on Structures, Communities, and Energy Generation (pp. 528-542). (12th Americas Conference on Wind Engineering 2013, ACWE 2013: Wind Effects on Structures, Communities, and Energy Generation; Vol. 1).