Over the last years, bend-twist coupling (BTC) has become one of the most important passive load reduction techniques in wind turbine blades. The kind and amount of BTC is often decided on the basis of the load reduction, often forgetting the related stability implications. In this work we perform the stability analysis of a very large wind turbine, where the BTC is obtained by rotating the fibers of the spar caps. The study focuses first on the isolated blade, and then on the complete wind turbine. The findings show that this BTC leaves some modes unaffected, but reduces the damping of the collective edgewise mode.

Stability analysis of wind turbines with bend-twist coupled blades

Riva, R;Sartori, L;Cacciola, S;Croce, A
2018-01-01

Abstract

Over the last years, bend-twist coupling (BTC) has become one of the most important passive load reduction techniques in wind turbine blades. The kind and amount of BTC is often decided on the basis of the load reduction, often forgetting the related stability implications. In this work we perform the stability analysis of a very large wind turbine, where the BTC is obtained by rotating the fibers of the spar caps. The study focuses first on the isolated blade, and then on the complete wind turbine. The findings show that this BTC leaves some modes unaffected, but reduces the damping of the collective edgewise mode.
2018
File in questo prodotto:
File Dimensione Formato  
RIVAR01-18.pdf

Accesso riservato

Descrizione: Paper
: Publisher’s version
Dimensione 849.02 kB
Formato Adobe PDF
849.02 kB Adobe PDF   Visualizza/Apri
RIVAR_OA_01-18.pdf

accesso aperto

Descrizione: Paper Open Access
: Publisher’s version
Dimensione 840.16 kB
Formato Adobe PDF
840.16 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1057202
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 1
social impact