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Emulation of interface stiffness for full scale tests on wind turbine blade bearings

: Steinkuhl, Felix Bastian; Wenske, Jan

Fulltext urn:nbn:de:0011-n-4735462 (643 KByte PDF)
MD5 Fingerprint: c521e4198f3fc8d8f13873cf6dbecb78
Created on: 17.11.2017

Deutsches Windenergie-Institut -DEWI-, Wilhelmshaven:
DEWEK 2017, 13th German Wind Energy Conference. Proceedings : 17 / 18 October 2017, Bremen, Germany
Wilhelmshaven, 2017
4 pp.
German Wind Energy Conference (DEWEK) <13, 2017, Bremen>
Bundesministerium fur Wirtschaft und Energie BMWi (Deutschland)
0325918; HAPT
Beschleunigte Dauerprüfung von Blattlagern für Multi-Megawatt-Turbinen
Conference Paper, Electronic Publication
Fraunhofer IWES ()
wind turbine; blade bearing; testing; test rig

Typical damage modes of rotor blade bearings are mainly related to oscillating movements with small angles under high loads. Under these conditions, the lubrication film between rollers and raceways of the bearings tends to collapse, which causes metal to metal contact and surface induced damage. Since established calculation methods for lifetime prediction are unsuitable for wind turbine blade bearings, full-scale test rigs are developed to close this particular knowledge gap. To generate realistic boundary conditions for bearing tests, the stiffness of the interfaces such as blade and hub have to be investigated. Because of the disadvantages of using real components within these test rigs, a possible solution is to use substitute components which aim to emulate the interface behaviour of the real components. This paper presents a method to derive a substitute of a rotor hub based on a FE-model of the virtual IWT7.5-164 research turbine. The results indicate that it is feasible to match the interface stiffness of the considered rotor hub with a corresponding substitute with only minor limitations.