0
research-article

Natural Frequency Analysis of a Spar-type Offshore Wind Turbine Tower with End Mass Components

[+] Author and Article Information
Kan Ye

School of Mechanical and Mechatronic Engineering, FEIT, University of Technology Sydney, PO Box 123, Broadway, NSW 2007, Australia
kan.ye@uts.edu.au

Jinchen Ji

School of Mechanical and Mechatronic Engineering, FEIT, University of Technology Sydney, PO Box 123, Broadway, NSW 2007, Australia
jin.ji@uts.edu.au

1Corresponding author.

ASME doi:10.1115/1.4040240 History: Received December 18, 2017; Revised May 02, 2018

Abstract

Different from the fixed-based wind turbines, the floating type wind turbines are regarded as under a free-free end operating condition. The tower structure of a floating offshore wind turbine is an integrated part connecting the nacelle and support platform. An analytic solution is presented in this technical brief for the free-vibration of the tower structure of a spar-type offshore wind turbine. The tower structure is modelled as a free-free beam based on Euler-Bernoulli beam-column theory. The platform and the nacelle are considered as two large mass components connected by torsion springs at two tower ends with different stiffness. The effects of system parameters on the natural frequencies are investigated under a range of variables, including the tower structure parameters, platform and nacelle parameters, and the connection types. Non-linear relationships between those variables and the natural frequency of the tower structure are numerically found and some design issues are discussed for the spar-type floating wind turbines.

Copyright (c) 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In