Spring damping type dynamic vibration absorber low-frequency vibration reduction structure based on photonic crystal

Abstract

The invention discloses a photonic crystal-based spring damping type dynamic vibration absorber low-frequency vibration reduction structure, which comprises a substrate, a plurality of groups of particle damping mechanisms are periodically arranged on the substrate, and each particle damping mechanism comprises a shell and a particle damper. The upper side and the lower side of the particle damper are each connected with a spring connected with the shell, the particle damper is elastically connected with the shell through the two springs, and the bottom of the shell is in threaded connection with the base plate. The particle damper and the shell are elastically connected through the two springs, so that a traditional connection mode of the particle damper is changed, the particle damper has the characteristics of extremely wide band gap and medium and low vibration reduction, particle collision in the particle damper can be kept balanced by utilizing the elastic effect of the springs, and the particle damper is prevented from being damaged. Noise is greatly reduced, the low-frequency vibration reduction effect is improved, and the requirement for vibration reduction and noise reduction of the photonic crystal is met.

Description

technical field [0001] The invention belongs to the technical field of vibration reduction and noise reduction processing, and in particular relates to a low frequency vibration reduction structure of a spring-damping dynamic vibration absorber based on a phononic crystal. Background technique [0002] Particle dampers were first used in gear damping, and grooves were designed inside the gears, and the grooves were filled with particles to reduce vibration. At present, most of the external-mounted particle dampers are used to rigidly connect the particle damping to the structure to be damped. Although the integrity of the structure can be ensured, the low-frequency vibration damping effect is poor, and the safety and durability are also poor. [0003] At present, a reasonable combination of two-stage spring frequencies is used to greatly widen the vibration reduction frequency band, but this structure is only suitable for vibration control of civil structures, and is not sui...

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a low-frequency vibration-reducing structure of a spring-damping dynamic vibration absorber based on a phononic crystal, so as to solve the problem that the low-frequency vibration-damping structure of a phononic crystal proposed in the background technology has a narrow vibration-damping frequency band and low noise. Large, low-frequency vibration reduction effect is not good

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