Strength and fatigue testing of rotors of large size wind turbines

Información del proyecto

S&FAT

Identificador del acuerdo de subvención: JOU20188

Proyecto cerrado

Fecha de inicio 1 Diciembre 1992

Fecha de finalización 31 Enero 1996

Financiado con arreglo a

• Specific research and technological development programme (EEC) in the field of non-nuclear energy, 1990-1994

Coste total

Sin datos

Aportación de la UE

Sin datos

Coordinado por

ENERGY RESEARCH CENTRE OF THE NETHERLANDS
Netherlands

Objetivo

The objective of this project is to establish a rationale of strength and fatigue testing.


If wind energy is to contribute to a greater extent to the electricity production, the generating cost has further to be reduced. This can be achieved by the reduction of machine manufacturing cost and by the improvement of system and structural reliability. Machines may become improved by thorough fatigue life analysis in the design phase. An important cost driver of a wind turbine is among others the rotor. A sensible method of making turbine rotors cheaper is obtained by making them lighter. To guarantee a rotor blade against early failure, whether caused by insufficient strength or fatigue, it is necessary to check the design by an approval test. In particular the fatigue life analysis is still quite unreliable, a specimen tested in laboratory conditions will fail quite often by Miner summations between 0.25 and 4 for constant amplitude test and between 0.6 and 1.6 for variable amplitude test. One method, and maybe the only method, to proof the reliability of the design is to perform a full scale strength and fatigue test. These tests might also be required in future by the certification authorities to get a full type certificate.

Main project items :
- Recommendations on procedures and criteria with regard to :
. strength tests (ST);
. dynamic tests (DT);
. fatigue tests (FT).
[Address the "should" and if so "when" question]
- Ibid on test procedures, such as :
. number of cross sections at which design loads has to be simulated (ST & FT);
. elastic behaviour, natural frequencies and ditto modes and mechanical damping (DT);
. rational on strength and fatigue boundary (ST & FT);
. rational on the translation of design to that fatigue spectrum (FT); . indication of strength and fatigue margins.
[Address the "how" question]
- Demonstration of these kind of tests.
- Cost & benefit analyses.

Ámbito científico (EuroSciVoc)

• ingeniería y tecnología › ingeniería ambiental › energía y combustibles › energía renovable › energía eólica

Programa(s)

• FP3-JOULE 2 - Specific research and technological development programme (EEC) in the field of non-nuclear energy, 1990-1994

Tema(s)

• 030202 - Generic wind energy R&D

Convocatoria de propuestas

Datos no disponibles

Régimen de financiación

CSC - Cost-sharing contracts

Coordinador

ENERGY RESEARCH CENTRE OF THE NETHERLANDS

• Aportación de la UE: Sin datos
• Dirección: Westerduinweg 3 ; PETTEN ; Países Bajos
• Coste total: Sin datos

Participantes (5)

CENTRO DE INVESTIGACIONES ENERGETICAS, MEDIAMBIENTALES Y TECNOLOGICAS

España

• Aportación de la UE: Sin datos
• Dirección: 22,Avenida Complutense 22 ; 28040 MADRID
• Coste total: Sin datos

GERMANISCHER LLOYD AG

Alemania

• Aportación de la UE: Sin datos
• Dirección: Vorsetzen 32 ; HAMBURG
• Coste total: Sin datos

Risø National Laboratory

Dinamarca

• Aportación de la UE: Sin datos
• Dirección: 399,Frederiksborgvej 399 ; 4000 Roskilde
• Coste total: Sin datos

STORK PRODUCT ENGINEERING BV

Países Bajos

• Aportación de la UE: Sin datos
• Dirección: 229,Czaar Peterstraat 229 ; 1000 AJ AMSTERDAM
• Coste total: Sin datos

T.G. Teknikgruppen AB

Suecia

• Aportación de la UE: Sin datos
• Dirección: 5,Allfarvägen 5 ; 191 91 Sollentuna
• Coste total: Sin datos