Beam structure vibration fatigue device
A vibration fatigue and beam structure technology, applied in the field of fatigue testing machines, can solve the problems of inability to implement equipment, inability to easily change the restraint mode, etc., and achieve the effect of small distortion
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Example Embodiment
[0041]Example one:
[0042]Fromfigure 1 It can be seen that the beam structure vibration fatigue device shown in the first embodiment includes a base 1, a support column 11, a vibration isolation spring 2, a vibration platform 3, a support joint 31, a beam end clamping seat 4, a beam specimen 5, and vibration Motor 6. Four T-shaped support columns 11 are welded on the four corners of the base 1, the vibration isolation spring 2 is a metal spiral compression spring, the support column 11 is welded to the bottom coil of the vibration isolation spring 2, and the top coil of the vibration isolation spring 2 is The support joint 31 is welded. Recombined asfigure 2 It can be seen that the support joint 31 includes three parts, the middle is a disc 312, and the two ends are respectively a spring guide post 311 and a support cylinder 313. The top coil of the support spring 2 passes through the spring guide post 311 and is welded to the bottom surface of the disc 312. The top surface of the sup...
Example Embodiment
[0050]Embodiment two:
[0051]Such asFigure 8 As shown, the difference between the second example and the first example lies in the structural shape and clamping method of the beam test piece, and the addition of a counterweight 7. CombinePicture 9 It can be seen that the top and bottom surfaces of one end of the beam specimen are flat, and the top and bottom surfaces of the other end are also flat. RejoinPicture 10 A central through hole 52 is opened in the middle of the beam test piece 5. In order to increase the inertial excitation force, the beam test piece is equipped with a counterweight 7. The counterweight includes an upper counterweight 71 and a lower counterweight 72. The upper counterweight 71 and the lower counterweight 72 have the same structural shape and size. Both the counterweight 71 and the lower counterweight 72 have five through holes, of which four are at the four corners and one is at the middle. The upper counterweight 71 is installed above the beam test piece 5,...
Example Embodiment
[0053]Embodiment three:
[0054]The difference between the third example and the first example lies in the structural shape and clamping method of the beam specimen. Such asPicture 11 withPicture 12 As shown, the top and bottom surfaces of both ends of the beam test piece are provided with arc-shaped grooves 51. The two ends of the beam test piece are respectively installed on the two beam-end rotatable clamping seats 41. The structure of the beam-end rotatable clamping seat 41 in this embodiment is the same as the structure of the beam-end rotatable clamping seat in the first embodiment, and will not be repeated here. In this way, the two ends of the beam test piece can be rotated slightly, and there is also a slight movement in the horizontal direction, which is similar to the constraint of a simply supported beam structure. Simple supported girder structures are more common in engineering, such as the main girder of a bridge crane as a simply supported girder structure. Based on the...
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