Vibration enhanced device of electric vibration table

Abstract

The invention provides a vibration enhanced device of electric vibration table, comprising a substrate and a test bed; the device is characterized in that: a spring is connected between the substrate and the test bed; a rigid guide bar leading the test bed surface to do vertical movement is installed between the substrate and the test bed; an additional mass block is placed at the center of the test bed; selection of the rigidity of the spring and the resonance frequency of the spring quality system satisfy the following relationship: omega n2=k(M+m) / Mm. Compared with the prior art, the technical proposal is easier to be implemented, and can effectively limit the transverse vibration and conveniently control the vibration enhanced frequency. The vibration enhanced ability can arrive more than 10 times. The technical proposal and the method can be used in various dynamic test apparatuses for enhancing the vibration acceleration or displacement and providing special dynamic excitation source.

Description

technical field [0001] The invention is a vibration enhancing device for an electric vibrating table, which belongs to the technical field of testing. Background technique [0002] As a commonly used vibration test equipment, the electric vibration table is often used to provide various sinusoidal acceleration, velocity and displacement signals. However, limited by the power (excitation force) and mechanical structure of the vibrating table, the vibration amplitude of the vibrating table surface that the electric vibrating table can provide is limited, and the acceleration is generally up to 1000m / s 2 , especially under a certain nominal maximum acceleration, as the frequency increases, the vibration displacement amplitude will decrease sharply, which is inversely proportional to the square of the frequency. In some special tests, although the load is not large, it requires greater acceleration or relatively large vibration displacement at medium and high frequencies. If t...

AI Technical Summary

Problems solved by technology

Nowadays, the resonant beam method is generally used to obtain greater acceleration, but it has lateral acceleration and lateral displacement, which has certain application limitations.

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