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AssigneeFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsMalo Rosemeier, Gregor Basters
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The invention relates to a mechanical testing device with at least one load frame, which has a frame part and a clamping device held therein, in which a beam-shaped test specimen, in particular a rotor blade or rotor blade segment, can be clamped projecting through the load frame, the load frame being mounted in a first pivot bearing arrangement on a carrier frame or a support frame so as to be rotatable about a first transverse axis of the test specimen which extends perpendicularly to its longitudinal axis projecting through the clamping device, wherein the frame part has a four-fold rotational symmetry, in particular a square shape, or an annular shape. The design of the load frame(s) results in easy rotatability/adjustability of the test specimen. In a method for carrying out the test, the system natural frequencies in different loading directions can be suitably matched.
A mechanical testing device with at least one load frame with a frame part and a clamping device held therein, in which a beam-shaped test specimen can be clamped projecting through the load frame, the load frame being mounted in a first pivot bearing arrangement on a carrier frame or a support frame so as to be rotatable about a first transverse axis of the test specimen which extends perpendicularly to its longitudinal axis projecting through the clamping device, such that the load frame has a square shape with a four-fold rotational symmetry, wherein the frame part has at least two frame-part-side pivot bearing parts or fastening devices for pivot bearing parts, which are arranged offset by 90 degrees on its circumference and are each configured to interact with carrier-frame-side pivot bearing parts on the carrier frame or pivot bearing parts on the support frame.
A mechanical testing device with at least one load frame with a frame part and a clamping device held therein, in which a beam-shaped test specimen can be clamped projecting through the load frame, the load frame being mounted in a first pivot bearing arrangement on a carrier frame or a support frame so as to be rotatable about a first transverse axis of the test specimen which extends perpendicularly to its longitudinal axis projecting through the clamping device, such that the load frame has a square shape with a four-fold rotational symmetry, wherein in a first pivot bearing arrangement the frame part is rotatably mounted in the carrier frame about the first transverse axis, such that the carrier frame has the same rotational symmetry as the frame part and the carrier frame is rotatably mounted in a second pivot bearing arrangement on the support frame about a second transverse axis of the test specimen clamped in the load frame, which second traverse axis extends perpendicularly to the longitudinal axis, is inclined with respect to the first transverse axis-, and extends perpendicularly to the first transverse axis of the test specimen.
Dependencies are inferred from the claim text.