Parameter-adjustable multi-line spectrum frequency vibration reduction device

Abstract

The invention relates to a parameter-adjustable multi-line spectrum frequency vibration reduction device. The parameter-adjustable multi-line spectrum frequency vibration reduction device comprises a top plate, a bottom plate, an electromagnetic unit and a mover mass unit, wherein the electromagnetic unit is arranged between the top plate and the bottom plate and comprises an electromagnet for generating a magnetic field; the mover mass unit comprises a mover mass block and elastic elements; the mover mass block is connected with a conductive and non-magnetic metal piece; the two ends of the mass block are connected to the top plate and the bottom plate through the elastic elements respectively; the magnetic field intensity of the electromagnet is adjusted by controlling current in an electromagnet coil; the mover mass block reciprocates in the vertical direction between the top plate and the bottom plate through the elastic elements to drive the metal piece to move in the magnetic field, so that eddy current damping is generated. According to the parameter-adjustable multi-line spectrum frequency vibration reduction device, the damping adjustment of a mass spring system is realized by adjusting the magnetic field through the electromagnet by using an eddy current phenomenon generated by movement of the conductive and non-magnetic metal piece in the magnetic field.

Description

technical field [0001] The invention relates to the technical field of vibration control, in particular to a parameter-adjustable multi-line spectrum frequency vibration reduction device. Background technique [0002] Vibration phenomena are ubiquitous in daily life, such as the vibration of bridges under the excitation of wind and earthquakes, the vibration of vehicles and ships during driving, the vibration of strings, etc. For most machinery and structures, vibration is generally considered harmful, for example, vibration will reduce the accuracy of the instrument and shorten the life of the machine. Therefore, it is necessary to effectively control harmful vibrations. [0003] Dynamic shock absorbers are an effective vibration reduction measure. The dynamic vibration absorber is composed of mass, spring and damping elements. The dynamic vibration absorber is attached to the main vibration system as a subsystem. As long as the vibration natural frequency of the vibratio...

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Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is to overcome the problem that the effective adjustment of damping cannot be realized in the existing shock absorber technology, the frequency of the vibration damping line spectrum is single and the frequency of the vibration damping line spectrum cannot be adjusted, and the problem of poor applicability

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