A kind of modal experiment platform and using method thereof

Abstract

The invention discloses a modal experiment platform and a usage method thereof. The modal experiment platform comprises a suspension rope, a rack, a lower base, a middle base, an upper base, a roller and a locking mechanism used for fixing the roller, the upper base and the middle base. The upper base and the middle base are not parallel in the sliding direction. The upper base, the middle base and the lower base are respectively provided with a vertical middle hole. The suspension rope passes through each vertical middle hole. The upper end of the suspension rope is connected with the roller. The lower end of the suspension rope is connected with a suspension platform positioned in the rack and used for placing a to-be-tested structural component. According to the technical scheme of the invention, through the simple hand wheel control manner, the precise adjustment of the position of the to-be-tested structural component is realized by utilizing the middle base, the upper base and the roller. Not only the reliability of a structural modal experiment result is guaranteed, but also the experimental labor intensity of the experimental personnel is reduced.

Description

technical field [0001] The invention belongs to the field of machinery, and in particular relates to a modal experiment platform and a using method thereof. Background technique [0002] Experimental modal analysis, also known as the experimental process of modal analysis, is the inverse process of theoretical modal analysis, one of the methods to verify the reliability of finite element analysis, and one of the necessary and effective means for structural dynamic design. In the modal experiment, it is very important whether the support method of the tested structural member is appropriate, because the structure will have different modal parameters under different boundary conditions. When designing a structure, the first thing people care about is the mode of the structural part under the free boundary, so in the experiment, the structural part to be tested needs to be suspended with elastic ropes, so that the structure has low support stiffness and damping, so as to be as ...

AI Technical Summary

Problems solved by technology

At present, there is no special platform for modal experiments. Most of the modal experiments are to suspend the tested structure at a fixed position (or fix it on a very soft foam), and connect an exciter to the tested structure. Because the position of the tested structure is fixed and cannot be adjusted, the vibrator and multiple sensors need to be moved repeatedly during the experiment, and the experimenters need to constantly move the equipment, which is too labor-intensive

In addition, during the experiment, because there is no suitable support and suspension tooling, the structural parts with large mass cannot be hung or the suspension is unreliable, and the structural parts with small mass cannot ensure that the direction of the structure and the exciter are consistent, resulting in inconsistent experimental results. reliable

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