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December 15, 2016

Huge Wind Turbine Blade Tests at BLAEST

Testing of the world’s longest wind turbine blade

The world’s longest rotor blade was manufactured by LM Wind Power in Denmark. Planning the test of the 290 ft (88.4 m) long rotor blade began in 2015. Tests are now underway together with BLAEST (the Blade Test Centre) in Aalborg, Denmark.

The LM 88.4 P test blade arrived at BLAEST on 1st July, 2016, after being transported from LM Wind Power’s Pilot Plant in Lunderskov. Four weeks later, the static test was successfully completed.

The LM 88.4 P demonstrated that it can withstand extremely high winds. In the months ahead, a fatigue test, involving shaking the blade up and down several million times, will establish if they have the durability and longevity to survive 25 years of offshore operation.

Throughout the rest of this year, two LM 88.4 P blades will be tested simultaneously: one at LM Wind Power’s Lunderskov Test Centre, and one at the BLAEST test facility. The parallel testing program will provide results over a 7-month duration – to ensure that the blade fulfils its design requirements in half the time normally required for testing.

The BLAEST test centre is co-owned by the leading wind technology institutes Force Technology, Technical University of Denmark (DTU – Risø) and Det Norske Veritas DNV Germanischer Lloyd. BLAEST operates several test stands for testing the strength and fatigue of wind turbine blades.

BLAEST Test Centre has been using Gantner Instruments strain gauge technology for several years. Several 100 measuring channels per measuring setup record the strain signals dynamically, synchronously and precisely. The modules Q.bloxx A116 and the test controller Q.station are used.

Testing is performed in cooperation with our Danish partner IPC Teknik ApS

Measurement Variables