Mechanical test device and method for testing bar-shaped test objects, in particular rotor blades of wind turbines

摘要

The invention relates to a mechanical test device with at least one load frame (4a, 4a ', 4b, 4b', 4c, 4d, 4e, 4f, 4g, 4h, 4i, 4j, 4k, 41, 4m), which is a frame part ( 5, 5a, 5b, 5c, 5d, 5j, 5 ', 5 ") and a clamping device held in this (6a, 6a', 6a", 6b, 6b ', 6b ") in which a bar-shaped The test item (1), in particular a rotor blade or rotor blade segment, can be clamped projecting through the load frame, the load frame in a first pivot bearing arrangement on a support frame (14, 14 ') or a support frame (15) about a first transverse axis (9) of the test item, which runs perpendicular to its longitudinal axis (8) protruding through the clamping device, is rotatably mounted, the frame part having fourfold rotational symmetry, in particular a square shape, or a circular ring shape. The design of the load frame (s) makes it easy to rotate / adjust the test object. In a method for performing the test, the system natural frequencies in different loading directions can be matched to one another in a suitable manner.