| 摘要 |
The present invention relates to a testing device for a free-free resonant column which can continuously hit one point by installing an impact hammer on a bearing, thereby obtaining accurate resonant frequency data by minimizing errors which can occur while hitting, regardless of user skill. The testing device for a free-free resonant column according to the present invention comprises: a frame including a pair of horizontal shafts which are arranged in parallel, vertical shafts which are arranged in parallel and connect both ends of the horizontal shafts, and a secondary shaft which is connected to the horizontal shafts at both ends and is moveable; multiple detachable fastening parts which are detachably connected to the frame; holding bands which are made of flexible material, are connected to the detachable fastening parts at both ends, and holds a test specimen in a free-free condition; a hitting unit which is rotatable by being connected to the secondary shaft using a bearing and hits the test specimen; and a reception device which receives and analyzes a waveform generating by the test specimen. |
