A novel method of strain - bending moment calibration for blade testing

The Science of Making Torque from Wind

Greaves, P.^1 ; Prieto, R.^1,2 ; Gaffing, J.^1 ; Van Beveren, C.^1,2 ; Dominy, R.^3 ; Ingram, G.^4

ORE Catapult, Offshore House, Albert St, Blyth, Northumberland

NE24 1LZ, United Kingdom^1

LM Wind Power, J. Duikerweg 15A, Heerhugowaard

1703 DH, Netherlands^2

Northumbria University, Newcastle upon Tyne

NE1 8ST, United Kingdom^3

Durham University, South Road, Durham

DH1 3LE, United Kingdom^4

关键词: Axial fatigue tests;    Beam theories;    Beam-like structures;    Biaxial fatigue;    Blade testing;    Offshore renewable energies;    State-of-the-art methods;    Wind turbine blades;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/753/4/042014/pdf
DOI  :  10.1088/1742-6596/753/4/042014

来源: IOP

【 摘 要 】

A new method of interpreting strain data in full scale static and fatigue tests has been implemented as part of the Offshore Renewable Energy Catapult's ongoing development of biaxial fatigue testing of wind turbine blades. During bi-axial fatigue tests, it is necessary to be able to distinguish strains arising from the flapwise motion of the blade from strains arising from the edgewise motion. The method exploits the beam-like structure of blades and is derived using the equations of beam theory. It offers several advantages over the current state of the art method of calibrating strain gauges.