Dynamic vibration absorbing device with tunable rigidity

A technology of dynamic vibration absorption and rigidity, which is applied in the direction of shock absorber, elastic shock absorber, vibration suppression adjustment, etc., and can solve the problems of narrow adjustment range, low adjustment accuracy, and limited use range

CN107013618AActive Publication Date: 2017-08-04NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2017-08-04

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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.
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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...

Examples

Embodiment Construction

[0020] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] see figure 1 and figure 2 , a dynamic vibration absorbing device with tunable stiffness according to a preferred embodiment of the present invention, comprising a base 1, an elastic element 2 connected to the base 1 at one end, and an adapter 3 connected to the other end of the elastic element 2 , an energy-absorbing mass 4 connected to the adapter 3 , a tuner for driving the elastic element 2 to expand and contract along its axial direction, and a first vibration sensor 5 arranged on the base 1 . The elastic element 2 is in the shape of a strip, such as a plate or a beam, and the material of the elastic element 2 includes metal materials, carbon fibers, glass fi...