Experiment system and verification method for gap nonlinear rigidity recognition
An experimental system and nonlinear technology, applied in the testing, measuring devices, instruments, etc. of machine/structural components, etc., can solve the problems that the gap cannot be adjusted continuously, cannot accurately provide nonlinear stiffness characteristics, and does not have zero stiffness characteristics, etc. The effect of precise and measurable gap size
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[0028] In order to better illustrate the purpose and advantages of the present invention, the specific implementation of the present invention will be described below through specific examples and in conjunction with the accompanying drawings.
[0029] In the specific embodiment of the present invention, the experimental system for gap nonlinear stiffness identification is as follows: figure 1 shown. The test system includes a gap structure, an excitation system (that is, a force hammer 4), a force sensor 1, an acceleration sensor 2, a speed and displacement sensor 3, and a measurement and analysis system 5. The structure diagram of the gap structure is as follows: figure 2 As shown, the gap structure includes a simply supported beam 7, a fixed shaft 8, a seated bearing 9, a limit bolt 10 and a supporting platform 11, and the simply supported beam 7 is made of 600×50×5.6mm (length×width×height) steel The fixed shaft 8 is cut into a groove by wire cutting, the simply supporte...
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