CN111907134A - A periodic metamaterial plate suitable for vibration reduction and vibration reduction performance optimization in specific frequency bands - Google Patents

Abstract

A periodic metamaterial plate suitable for vibration reduction in a specific frequency band and optimization of the vibration reduction performance, the present invention relates to a periodic metamaterial plate. Aiming at the problem of poor vibration reduction effect in a specific frequency band, the present invention includes a plurality of local oscillator structures, a basic frame and an elastic film, the elastic film is attached to the upper surface of the basic frame, and the plurality of local oscillator structures are arranged on the elastic film. on the upper surface. The materials used in the present invention are all common materials, which are low in cost and simple in processing. This metamaterial plate structure can not only provide a correct basis for verifying theories and simulation results, but also can be widely used in engineering and life, and has obvious advantages. The vibration reduction effect can meet the needs of vibration reduction and performance optimization in specific frequency bands.

Description

A Periodic Metamaterial Plate Suitable for Vibration Reduction in Specific Frequency Bands and Optimization of Vibration Reduction Performance

technical field

The invention relates to a periodic metamaterial plate, in particular to a periodic metamaterial plate suitable for vibration reduction in a specific frequency band and optimization of vibration reduction performance, and belongs to the technical field of mechanical vibration and noise control.

Background technique

In actual engineering production, some vibrations are often encountered. In life, some vibrations will have a great impact on construction and have a lot of adverse effects on life. The use of periodic structures can better achieve vibration reduction, and in It has better vibration reduction effect in a wider frequency band.

Existing structures for vibration reduction are vibration reduction in a relatively wide frequency range, lacking in pertinence, and the vibration reduction effect for a specific frequency band is not good.

SUMMARY OF THE INVENTION

In order to solve the problem that the current technologies are vibration reduction with a wide frequency range, lack of pertinence, and poor vibration reduction effect in a specific frequency band, the invention further provides a period suitable for vibration reduction in a specific frequency band and optimization of the vibration reduction performance. Metamaterial board.

The technical scheme that the present invention takes to solve the above problems is:

The invention includes a plurality of local vibrator structures, a base frame and an elastic film, the elastic films are attached to the upper surface of the base frame, and the plurality of local vibrator structures are arranged on the upper surface of the elastic film.

Further, the plurality of local oscillator structures are arranged on the upper surface of the elastic film in a matrix shape.

Further, each of the local oscillator structures includes a hemisphere and a wrapping film, the plane of the hemisphere and the elastic film are bonded together, and the wrapping film is attached to the arc surface of the hemisphere.

Further, the hemisphere is a solid hemisphere.

Further, the wrapping film is an elastic rubber film.

Further, the elastic film is an elastic film made of rubber.

Further, the basic frame is a rectangular frame, a plurality of rectangular grids are evenly distributed on the upper surface of the basic frame, and each rectangular grid is provided with a local oscillator structure.

The beneficial effects of the present invention are:

Each part of the test piece of the present invention is made by mechanical processing means, and the required materials are all common materials, the cost is low, the processing is simple and easy to realize, and the cost is saved for scientific research;

This kind of metamaterial plate structure can not only provide a correct basis for verifying theories and simulation results, but also can be widely used in engineering and life.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the front view of the present invention;

Fig. 3 is the top view of the present invention;

Fig. 4 is the bottom view of the present invention;

Figure 5 is a conceptual diagram of a unit cell structure;

FIG. 6 is a schematic diagram of the structure of the local oscillator.

Detailed ways

Embodiment 1: This embodiment is described with reference to FIG. 1 to FIG. 6. A periodic metamaterial plate suitable for vibration reduction and vibration reduction performance optimization in a specific frequency band described in this embodiment includes a plurality of local oscillator structures 1, a basic frame 2 and an elastic film 3 , the elastic film 3 is attached to the upper surface of the base frame 2 , and a plurality of local vibrator structures 1 are arranged on the upper surface of the elastic film 3 .

The design of this structure can ensure rigid displacement between the base frame 2, the elastic film 3 and the local oscillator structure; the base frame 5 is the foundation of the entire structure, which can be lifted by elastic ropes to achieve free support, or other supports. This structure is mainly used for vibration reduction and noise reduction in practical projects, such as sound insulation walls of houses. The advantage of using this structure is that the structure can be parameterized according to the engineering requirements, and the design purpose is to achieve better vibration reduction effect at the engineering demand frequency (ie, a specific frequency).

Embodiment 2: This embodiment will be described with reference to FIG. 6 . The plurality of local vibrator structures 1 described in this embodiment are arranged on the upper surface of the elastic film 3 in a matrix shape. It is arranged in a matrix, that is, it is arranged in a periodic arrangement, which is conducive to vibration reduction.

Other components and connection relationships are the same as in the first embodiment.

Embodiment 3: This embodiment will be described with reference to FIG. 6 , each local oscillator structure 1 described in this embodiment includes a hemisphere 1-1 and a wrapping film 1-2, and the plane of the hemisphere 1-1 is adhered to the elastic film 3 After joining together, the wrapping film 1-2 is attached to the arc surface of the hemisphere 1-1. The hemisphere is integrally formed to ensure the accuracy of the experiment. And the operation is very simple, and a single person can complete the assembly experiment, which brings great convenience to the experiment.

The other components are the same as those in the first or second embodiment in the connection relationship.

Embodiment 4: This embodiment is described with reference to FIG. 6 . The hemisphere 1-1 in this embodiment is a solid hemisphere. First, the edge of the hemisphere is relatively smooth, without sharp edges and corners, and it is not easy to pierce the film; secondly, the solid sphere also ensures the quality of the vibrator, thereby ensuring the effect of vibration reduction.

Embodiment 5: This embodiment is described with reference to FIG. 6 . The wrapping film 1-2 in this embodiment is an elastic rubber film. Other compositions and connection relationships are the same as in the first, second or third embodiment.

Embodiment 6: This embodiment will be described with reference to FIG. 1 to FIG. 2 . The elastic film 3 in this embodiment is an elastic film made of rubber.

Other components and connection relationships are the same as in the fifth embodiment.

Embodiment 7: This embodiment will be described with reference to FIG. 4. The basic frame 2 in this embodiment is a rectangular frame, and a plurality of rectangular grids 2-1 are evenly distributed on the upper surface of the basic frame 2. There is a local oscillator structure 1 .

Other components and connection relationships are the same as in the first embodiment.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. The technical personnel, within the scope of the technical solution of the present invention, can make some changes or modifications by using the technical content disclosed above to be equivalent examples of equivalent changes, but if they do not depart from the technical solution content of the present invention, according to the present invention Within the spirit and principle of the present invention, any simple modifications, equivalent replacements and improvements made to the above embodiments still fall within the protection scope of the technical solutions of the present invention.

Claims (7)

1. The utility model provides a cycle metamaterial board suitable for specific frequency channel damping and damping performance optimization which characterized in that: the periodic metamaterial plate suitable for specific frequency band vibration reduction and vibration reduction performance optimization comprises a plurality of local oscillator structures (1), a base frame (2) and an elastic film (3), wherein the elastic film (3) is attached to the upper surface of the base frame (2), and the local oscillator structures (1) are arranged on the upper surface of the elastic film (3).

2. The periodic metamaterial plate suitable for specific frequency band vibration damping and optimization of vibration damping performance as claimed in claim 1, wherein: the plurality of local oscillator structures (1) are arranged on the upper surface of the elastic film (3) in a matrix shape.

3. The periodic metamaterial plate suitable for specific frequency band vibration damping and optimization of vibration damping performance as claimed in claim 1, wherein: each local oscillator structure (1) comprises a hemisphere (1-1) and a wrapping film (1-2), the plane of the hemisphere (1-1) is bonded with the elastic film (3), and the wrapping film (1-2) is attached to the arc surface of the hemisphere (1-1).

4. The periodic metamaterial plate suitable for specific frequency band vibration damping and optimization of vibration damping performance as claimed in claim 2, wherein: the hemisphere (1-1) is a solid hemisphere.

5. The periodic metamaterial plate suitable for specific frequency band vibration damping and optimization of vibration damping performance as claimed in claim 2, wherein: the wrapping film (1-2) is an elastic rubber film.

6. The periodic metamaterial plate suitable for specific frequency band vibration damping and optimization of vibration damping performance as claimed in claim 5, wherein: the elastic film (3) is made of rubber.

7. The periodic metamaterial plate suitable for specific frequency band vibration damping and optimization of vibration damping performance as claimed in claim 1, wherein: the base frame (2) is a rectangular frame, a plurality of rectangular grids (2-1) are distributed on the upper surface of the base frame (2), and a local oscillator structure (1) is arranged in each rectangular grid (2-1).

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