Abstract: A wind turbine rotor blade load emulator arrangement includes a support unit constructed to support a rotor blade during a fatigue test procedure; an exciter configured to deflect the rotor blade during a fatigue test procedure; and a stiffness augmentation assembly for mounting to the rotor blade over a mounting length, which stiffness augmentation assembly is realized to increase the stiffness of the rotor blade in the mounting length. A method of carrying out a fatigue test procedure on a wind turbine rotor blade uses such a load emulator arrangement.

Abstract: Provided is a method and an arrangement of fatigue testing of a wind turbine rotor blade, the method including: operating an actuator attached to the rotor blade, thereby moving a mass connected to the actuator in a reciprocating manner. The mass may be a hanging mass, for example, hanging down from the actuator.

Abstract: A wind turbine rotor blade load emulator arrangement includes a support unit constructed to support a rotor blade during a fatigue test procedure; an exciter configured to deflect the rotor blade during a fatigue test procedure; and a stiffness augmentation assembly for mounting to the rotor blade over a mounting length, which stiffness augmentation assembly is realized to increase the stiffness of the rotor blade in the mounting length. A method of carrying out a fatigue test procedure on a wind turbine rotor blade uses such a load emulator arrangement.

Abstract: A test arrangement for fatigue testing a wind turbine blade, including a floor-mounted test rig having a fixing device for fixing the wind turbine blade to the test rig and an excitation assembly for exciting the wind turbine blade at a test frequency, wherein the test rig includes a liquid tank having a chamber containing a predefined liquid, wherein the liquid in the liquid tank has a resonance frequency depending on the amount of liquid in the liquid tank and the chamber geometry is provided.

Abstract: Provided is an exciter device for fatigue testing of a blade of a wind turbine, including a actuator for generating a periodic excitation force and a coupling device for coupling the actuator to a blade to be tested. The exciter device includes a pretensioning device applying a pretension such that the excitation force only acts in a pulling or pushing direction over the whole period.

Abstract: Provided is a system for fatigue testing a wind turbine blade including: a mounting for retaining a root end of the wind turbine blade, at least one actuator assembly for attachment to the wind turbine blade, the at least one actuator assembly including at least one actuator for exciting the wind turbine blade in flapwise directions and/or edgewise directions, and at least one measuring device for measuring of a stress, a strain and/or a deflection of the wind turbine blade. The system further includes at least one tuned liquid damper for attachment to the wind turbine blade, the tuned liquid damper comprising a container and a liquid contained therein.

Abstract: A test arrangement for fatigue testing a wind turbine blade, including a floor-mounted test rig having a fixing device for fixing the wind turbine blade to the test rig and an excitation assembly for exciting the wind turbine blade at a test frequency, wherein the test rig includes a liquid tank having a chamber containing a predefined liquid, wherein the liquid in the liquid tank has a resonance frequency depending on the amount of liquid in the liquid tank and the chamber geometry is provided.

Abstract: Provided is a method and an arrangement of fatigue testing of a wind turbine rotor blade, the method including: operating an actuator attached to the rotor blade, thereby moving a mass connected to the actuator in a reciprocating manner.

Abstract: Provided is a system for fatigue testing a wind turbine blade including: a mounting for retaining a root end of the wind turbine blade, at least one actuator assembly for attachment to the wind turbine blade, the at least one actuator assembly including at least one actuator for exciting the wind turbine blade in flapwise directions and/or edgewise directions, and at least one measuring device for measuring of a stress, a strain and/or a deflection of the wind turbine blade. The system further includes at least one tuned liquid damper for attachment to the wind turbine blade, the tuned liquid damper comprising a container and a liquid contained therein.