Dynamic vibration absorbing device with tunable rigidity

Abstract

The invention relates to a vibration damping device in the vibration control field, in particular to a dynamic vibration absorbing device with tunable rigidity. The dynamic vibration absorbing device comprises a pedestal, an elastic element, one end of which is connected with the pedestal, an adaptor which is connected with the other end of the elastic element, an energy absorbing mass block which is connected with the adaptor, a tuner for driving the elastic element to stretch out and draw back in the axial direction of the tuner, and a first vibration sensor arranged on the pedestal; the tuner comprises a deformation material connected with the elastic element, and a drive mechanism for driving the deformation material to stretch out and draw back in the axial direction of the drive mechanism; and the material of the elastic element comprises a metal material, a carbon fiber composite material, a glass fiber composite material and an elastic rubber material. The elastic element of the device can be regulated in degree of stretching out and drawing back through the deformation material, so that the purpose of regulating the rigidity of the elastic element is achieved. The dynamic vibration absorbing device is wide in regulating range, and is strong in real-time property; and the controllable deformation range of the deformation material is within a micro dimension, and controllable precision is high.

Description

technical field [0001] The invention relates to a shock absorbing device in the field of vibration control, in particular to a dynamic shock absorbing device with adjustable stiffness. Background technique [0002] Dynamic vibration absorbers can absorb the vibration energy of the main structure and block the transmission of vibration in the main structure, and are widely used in the fields of ships, machinery, aerospace and other fields. Most of the early dynamic vibration absorbers are in the form of passive vibration absorption. This type of vibration absorber has a simple structure and is easy to implement. For the main structure with a single vibration frequency, the passive vibration absorber has a better vibration absorption effect, but once the passive vibration absorber is designed, it is not easy to change, its parameters cannot be adjusted, and the effective frequency band is narrow, which is not conducive to the vibration suppression application of broadband stru...

AI Technical Summary

Problems solved by technology

Generally, the semi-active vibration absorber obtains the natural frequency consistent with the main structure by changing the stiffness or mass, such as mechanical stiffness adjustment vibration absorber, stiffness segmented linear adaptive dynamic vibration absorber based on structural characteristics, and air spring vibration absorption with variable internal pressure Liquid-filled variable mass dynamic shock absorbers, etc., but these shock absorbers have the disadvantages of narrow adjustment range and low adjustment accuracy, which limit their application range

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