MTS Wind Turbine Blade Fatigue Test Solutions
Apply single- and dual-axis cyclic loading to full-scale wind turbine blades and sub-components at resonant frequencies to meet fatigue-testing demands of International Electrotechnical Commission (IEC) Technical Specification 61400-23. The MTS offering includes two complementary solutions: the fast, powerful Ground-coupled Resonance Excitation (GREX) System, and the flexible, efficient Inertial Resonance Excitation (IREX) System.
Applications
Test Specimens
Key Product Features
Integrated / Synchronized
State-of-the-art controls, data acquisition and application software comprise an efficient, high-fidelity test and simulation environment.
Versatile
Configurable for flap-wise, edge-wise and dual-axis resonant blade fatigue testing
Efficient Operation
Features automated control of test end-levels and test frequency
Durable / Reliable
Integrates fatigue-rated MTS test actuators, swivels and mounting hardware
Technical Overview
Diagram
- Reaction Block
- Hydraulic Service Manifold
- Ground Resonance Excitation (GREX) System
- Wind Turbine Blade Specimen
- Loading Fixture
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GREX 50 Standard Specifications |
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Force capacity |
50 kN |
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Actuator Length |
5.67 m at mid-stroke |
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Stroke |
1.75 m |
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Velocity |
2.5 m/sec (@25kN force) |
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Servovalve |
450 lpm |
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Special Options |
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Extension Tube |
Up to 3m extension |
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Hydraulic System |
260 lpm (minimum recommended) |
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Accumulation required |
75 L Pressure / 37.75 L Return (recommended) |
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GREX 100 Standard Specifications |
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Force capacity |
100 kN |
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Actuator Length |
5.67 m at mid-stroke |
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Stroke |
1.75 m |
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Velocity |
2.5 m/sec (@25kN force) |
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Servovalve |
940 lpm |
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Special Options |
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Extension Tube |
Up to 3m extension |
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Hydraulic System |
520 lpm (minimum recommended) |
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Accumulation required |
150 L Pressure / 75 L Return (recommended) |
Diagram
- Inertial Resonance Excitation (IREX) System
- Loading Fixture
- Hydraulic Hose Stands
- Hydraulic Service Manifold
- Reaction Block
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IREX Standard Specifications |
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Force capacity |
50 kN |
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Moving mass range |
160-1010 kg |
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Moving mass increment |
50 kg |
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Stationary mass (typ) |
170-230 kg |
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Total mass (typ) |
330-390 kg |
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Dimensions |
1.42x.53x.48 m |
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Stroke |
0.15 m |
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Velocity |
1.37 m/sec |
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Servovalve |
120 lpm |
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Hose sizes |
-16P, -16R, -8D JIC |
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Special Options |
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Tilt angle range |
+/- 10 deg |
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Tilt angle increment |
2 deg |
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Accumulation required |
2 L (normal) |
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