Variable-frequency photonic crystal vibration suppression device for structure

Abstract

The invention discloses a variable-frequency photonic crystal vibration suppression device for a structure. The variable-frequency photonic crystal vibration suppression device comprises a first-order elastic column, a first-order oscillator mass element, a second-order elastic column, a second-order oscillator mass element, a third-order elastic column, a third-order oscillator mass element and an elastic column base. The first-order oscillator mass element is of a frame structure, elastic column bases for providing structural support for other-order oscillators are symmetrically arranged on the frame structure, and the first-order oscillator mass element is fixedly connected with first-order elastic columns; the second-order elastic column and the third-order elastic column are installed on the corresponding elastic column bases respectively. The second-order oscillator mass element and the third-order oscillator mass element are fixedly connected with the second-order elastic column and the third-order elastic column respectively. The second-order elastic column and the third-order elastic column are provided with adjusting devices used for controlling axial tension and pressure in the second-order elastic column and the third-order elastic column. The vibration suppression frequency of the device can be correspondingly adjusted, and the device has excellent multi-level line spectrum vibration suppression efficiency and has wide engineering application prospects.

Description

technical field [0001] The invention relates to ship structure vibration reduction and noise reduction technology, in particular to a frequency conversion phonon crystal vibration suppression device for structures. Background technique [0002] The traditional vibration suppression and noise reduction technology has become more and more mature after the rapid development since the last century, and the representative dynamic vibration absorption technology is a commonly used vibration suppression method in mechanical engineering problems. When the structure of the main body cannot be easily changed, or when the vibration suppression effect of vibration isolation and additional damping is not good, dynamic vibration absorbers can be used to effectively suppress the line spectrum vibration of the main system. Traditional dynamic vibration absorbers can be divided into single-frequency vibration absorbers and compound vibration absorbers according to the difference in the order...

AI Technical Summary

Problems solved by technology

However, with the passage of time, equipment aging, structural deformation and additional structures will lead to changes in the line spectrum characteristics of the system, and the originally designed dynamic vibration absorber will gradually fail. Vibration device is very necessary

Images