CN111306231A - A Vibration Isolation Device Based on Recoverable Large Deformation Metamaterial Structure - Google Patents

Abstract

The invention discloses a vibration isolation device based on a recoverable large-deformation metamaterial structure, which comprises m structural units with the same structure, wherein the m structural units are sequentially connected from top to bottom, and m is more than or equal to 1; each structural unit comprises a plurality of curved rods with arc-shaped structures, a bottom plate and a mounting clamp; a plurality of synapses are arranged on the bent outer side of the bent rod; one end of the bent rod is connected with the mounting clamp, and the other end of the bent rod is abutted against the bottom plate; synapses on the bent rod are sequentially arranged at one end close to the bottom plate; the invention realizes the effect of larger damping through the structural design, can be used in severe environments such as high temperature, high pressure, radioactivity and the like, and can be in service for a long time under extreme conditions.

Description

A Vibration Isolation Device Based on Recoverable Large Deformation Metamaterial Structure

technical field

The invention relates to a vibration isolation device, in particular to a vibration isolation device based on a recoverable large deformation metamaterial structure.

Background technique

Rubber materials have the characteristics of superelasticity and viscoelasticity, and can return to the original configuration after large deformation. With its excellent mechanical properties and damping effect, rubber materials have become the first choice for sealing, vibration reduction and energy consumption. However, the rubber material has obvious aging phenomenon under the action of the environment, which leads to significant performance deterioration, especially under extreme conditions such as high temperature, it is difficult to meet the engineering needs of long-term service. Compared with rubber materials, metal materials can withstand higher temperature and external load impact, and its components have the characteristics of long storage and service life, and are not easy to age with time. Therefore, various parts made of metal materials can maintain stable mechanical properties in extreme working environments and meet special engineering needs, especially for aviation, aerospace, marine, chemical and other fields. However, at present, there is no metal material component that can have the performance of rubber material, and no device can be used in harsh environments for a long time on the basis of good damping characteristics.

SUMMARY OF THE INVENTION

Aiming at the problems existing in the prior art, the present invention provides a vibration isolation device based on a recoverable large deformation metamaterial structure, which has good damping characteristics and can be used for a long time in harsh environments.

The technical scheme adopted in the present invention is: a vibration isolation device based on a recoverable large deformation metamaterial structure, comprising m structural units with the same structure connected up and down in sequence, m≥1; each structural unit includes a plurality of arc-shaped The bent rod, the bottom plate and the installation fixture of the structure; a plurality of synapses are arranged on the outer side of the curved rod; one end of the curved rod is connected to the mounting fixture, and the other end is abutted on the bottom plate;

Further, the synapse on the curved rod is a semi-circular structure, and the radius of the synapse decreases sequentially from the side close to the base plate to the side close to the installation fixture.

Further, the connecting fixture is a polygonal structure, and the number of sides n is matched with the number of bending rods; each bending rod corresponds to one side of the connecting fixture.

Further, each side of the connecting fixture is provided with a groove at a corresponding position, and the bending rod and its connecting end are provided with a clamping block matched with the groove.

Further, the clamping block is arranged outside the arc of the curved rod.

Further, the bottom plate has a circular structure.

The beneficial effects of the present invention are:

(1) Through the bending and sliding of the bending rod, the present invention can cause the structure to be greatly deformed under the compressive load and can spontaneously return to the initial configuration after unloading;

(2) The present invention consumes externally loaded mechanical energy through the sliding friction between the synapse and the bottom plate on the curved rod with synapse, so as to achieve the effect of damping energy consumption;

(3) The present invention achieves the effect of greater damping through structural design, can be used in harsh environments such as high temperature, high pressure, and radioactivity, and can serve in extreme conditions for a long time.

Description of drawings

Figure 1 is a schematic structural diagram of a bent rod in the present invention, a is a front view, b is a left side view, c is a top view, and d is an axonometric view.

2 is a schematic diagram of the structure of the bottom plate of the present invention, a is a front view, b is a left view, c is a top view, and d is an axonometric view.

3 is a schematic structural diagram of an installation fixture in the present invention, a is a front view, b is a left side view, c is a top view, and d is an axonometric view.

4 is a schematic diagram of the combined structure of the bending rod and the installation fixture in the present invention, a is a front view, b is a left side view, c is a top view, and d is an axonometric view.

Figure 5 is a front view of the device of the present invention.

FIG. 6 is a schematic diagram of the three-dimensional structure of the device of the present invention.

In the figure, 1-bending rod, 2-base plate, 3-installation fixture.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

As shown in Figures 1 to 6, a vibration isolation device based on a recoverable large deformation metamaterial structure includes m structural units with the same structure connected up and down in sequence, m≥1; each structural unit includes a plurality of arc-shaped Bending rod 1, bottom plate 2 and installation fixture 3 of the structure; a plurality of synapses are arranged on the curved outer side of the bending rod 1; Arranged in sequence and arranged near one end of the bottom plate 2 .

The synapse on the bent rod 1 is a semi-circular structure, and its radius decreases sequentially from the side close to the base plate 2 to the side close to the installation fixture 3 . The connecting fixture 3 is a polygonal structure, and the number of sides n matches the number of the bending rods 1 ; each bending rod 1 corresponds to one side of the connecting fixture 3 . Each side of the connecting fixture 3 is provided with a groove at a corresponding position, and the bending rod 1 and its connecting end are provided with a clamping block matched with the groove. The clamping block is arranged outside the arc of the bending rod 1 . The bottom plate 2 has a circular structure.

In the present invention, the rigidity of the structure is reduced by the bending and sliding instability of the bending rod with synapse under load, so that the structure can be deformed greatly, and the collective shape can be recovered after unloading. The friction behavior between the base plates 2 realizes the vibration isolation and energy dissipation of the structure. During the compression process, the synapses in the bent rod 1 with synapses are in contact with the bottom plate 2 in turn, so that the structural rigidity increases stepwise with the increase of the compression amount, and with the improvement of the damping energy consumption effect, it has a self-protection effect.

According to the service conditions, the energy consumption can be optimized by designing the geometric parameters of the synaptic bending rod 1 and the size of the synapse, and the number of the synaptic bending rod 1 can be increased by means of parallel connection, and the loading can be realized by installing the fixture 3 . It can reduce the influence of stick-slip phenomenon on structural deformation, and improve the stability of structural deformation process and energy consumption behavior. And by selecting suitable metal materials, the structure can have good durability in harsh environments such as high temperature, high humidity, and radioactivity, and overcome the limitations of traditional energy-consuming materials that are difficult to serve in extreme conditions for a long time.

The invention meets the requirements of the vibration isolation device through the structural design, so that its structural rigidity is controllable, that is, it rises in a stepped manner with the increase of the compression amount, and with the improvement of the damping energy dissipation effect, it can better dissipate the energy according to the service conditions. Optimized design, the structure has a self-protection mechanism. By controlling the binding parameters of the bent rod 1 with synapses and the arrangement of synapses, the bent rod 1 with synapses can be bent and deformed and slide laterally under load, thereby reducing the structural rigidity. At the same time, the design ensures that the metal material always works within the elastic range under the external load, and realizes the ability of the component to restore the original shape under multiple loading and unloading. During the structural deformation process, the synapse with the synaptic bending rod 1 rubs against the bottom plate 2 to play the role of vibration isolation and energy dissipation, and the friction behavior can be adjusted to optimize the design. By adjusting the number, position and shape of the synapses in the curved rod 1, the synapses of the curved rod 1 with synapses are in contact with the bottom plate 2 from the outer end in turn during the compression process, and the variable damping is realized with the stepwise rise of the structural stiffness. and self-protection.

It can be prepared by 3D printing, and the installation fixture 3 is connected to the bent rod with synapse 1 by means of geometric constraints to realize external loading. When in use, a vibration or compressive load is applied to the upper end of the curved rod 1, and the synapse in the curved rod 1 with synapses rubs against the bottom plate 2 during the structural movement to realize energy dissipation.

Claims (6)

1. The vibration isolation device based on the recoverable large-deformation metamaterial structure is characterized by comprising m structural units which are sequentially connected from top to bottom and have the same structure, wherein m is more than or equal to 1; each structural unit comprises a plurality of curved rods (1) with arc-shaped structures, a bottom plate (2) and a mounting clamp (3); a plurality of synapses are arranged on the bent outer side of the bent rod (1); one end of the bent rod (1) is connected with the mounting clamp (3), and the other end of the bent rod is propped against the bottom plate (2); synapses on the bent rod (1) are sequentially arranged at one end close to the bottom plate (2).

2. The vibration isolation device based on the recoverable large-deformation metamaterial structure according to claim 1, wherein synapses on the bent rods (1) are in a semicircular structure, and the radius of the synapses decreases from the side close to the base plate (2) to the side close to the mounting fixture (3).

3. The vibration isolation device based on the recoverable large-deformation metamaterial structure according to claim 1, wherein the connecting clamp (3) is of a polygonal structure, and the number of sides n of the connecting clamp is matched with the number of the bent rods (1); each bent rod (1) is correspondingly connected with one edge of the clamp (3).

4. The vibration isolation device based on the recoverable large-deformation metamaterial structure according to claim 3, wherein a groove is formed in a position corresponding to each edge of the connecting clamp (3), and a clamping block matched with the groove is arranged at the connecting end of the bent rod (1).

5. The vibration isolation device based on the recoverable large-deformation metamaterial structure according to claim 4, wherein the fixture blocks are arranged outside the arc of the bent rod (1).

6. The vibration isolation device based on the recoverable large-deformation metamaterial structure according to claim 1, wherein the base plate (2) is of a circular structure.

Images