Stability analysis of wind turbines with bend-twist coupled blades

Riccardo Riva; M Spinelli; L Sartori; S Cacciola; A Croce

doi:10.1088/1742-6596/1037/6/062014

Stability analysis of wind turbines with bend-twist coupled blades

Riccardo Riva^*, M Spinelli, L Sartori, S Cacciola, A Croce

^*Corresponding author for this work

Polytechnic University of Milan

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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.

Original language	English
Article number	062014
Book series	Journal of Physics: Conference Series
Volume	1037
Issue number	6
Number of pages	10
ISSN	1742-6596
DOIs	https://doi.org/10.1088/1742-6596/1037/6/062014
Publication status	Published - 2018
Event	The Science of Making Torque from Wind 2018 - Politecnico di Milano (POLIMI), Milan, Italy Duration: 20 Jun 2018 → 22 Jun 2018 Conference number: 7 http://www.torque2018.org/

Conference

Conference	The Science of Making Torque from Wind 2018
Number	7
Location	Politecnico di Milano (POLIMI)
Country/Territory	Italy
City	Milan
Period	20/06/2018 → 22/06/2018
Internet address	http://www.torque2018.org/

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Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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title = "Stability analysis of wind turbines with bend-twist coupled blades",

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. ",

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AU - Cacciola, S

AU - Croce, A

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N2 - 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.

AB - 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.

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ER -

Stability analysis of wind turbines with bend-twist coupled blades

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