阅读说明：本技术 一种环绕型局域共振轻质点阵夹芯板结构的实验装置 (Experimental device for surrounding type local resonance light dot matrix sandwich plate structure ) 是由 李金强 范鑫磊 张垚 李凤鸣 于 2020-03-30 设计创作，主要内容包括：一种环绕型局域共振轻质点阵夹芯板结构的实验装置,本发明涉及一种除氧结构,本发明为解决传统点阵夹心结构不能控制低频弹性波的传播,以及局域共振型声学超材料往往没有较大刚度质量较大的问题,本发明包括上板体和下板体,上板体和下板体由上至下依次水平设置设置,本发明还包括多个支撑单元,多个支撑单元呈矩阵状设置在上板体的下表面和下板体的上表面之间。本发明属于机械实验装置技术领域。本发明将点阵夹芯与局域共振型声学超材料(吸振器组件)结合起来,使本结构具有更高强度与稳定性的同时,还可以实现对低频振动的抑制作用。(The invention relates to an experimental device of a surrounding type local resonance light dot matrix sandwich plate structure, which relates to an oxygen removing structure and aims to solve the problems that the traditional dot matrix sandwich structure can not control the transmission of low-frequency elastic waves and the local resonance acoustic metamaterial does not have larger rigidity and larger mass. The invention belongs to the technical field of mechanical experiment devices. The lattice sandwich structure combines the lattice sandwich with the local resonance type acoustic metamaterial (the vibration absorber component), so that the structure has higher strength and stability and can also realize the inhibiting effect on low-frequency vibration.)

1. The utility model provides an experimental apparatus of light dot matrix sandwich panel structure of type of encircleing, it includes plate body (1) and lower plate body (2), goes up plate body (1) and lower plate body (2) and from top to bottom sets up its characterized in that horizontally in proper order: the experimental device for the surrounding type local resonance light dot matrix sandwich plate structure further comprises a plurality of supporting units (3), wherein the supporting units (3) are arranged between the lower surface of the upper plate body (1) and the upper surface of the lower plate body (2) in a matrix shape.

2. The experimental facility of the surrounding type local resonance light lattice sandwich plate structure of claim 1, wherein: the number of rows of the matrix formed by the supporting units (3) is M, the number of columns of the matrix formed by the supporting units (3) is N, and M and N are positive integers.

3. The experimental facility of the surrounding type local resonance light lattice sandwich plate structure of claim 2, wherein: each supporting unit (3) is composed of four vibration absorber components which are arranged in a pyramid shape.

4. The experimental facility of the surrounding type local resonance light lattice sandwich plate structure of claim 3, wherein: each vibration absorber component comprises an upper end (3-1) of the vibration absorber, an upper spring (3-2), a cylindrical vibrator (3-3), a lower spring (3-4), a lower end (3-5) of the vibration absorber and a cylindrical rod body (3-6), wherein the upper spring (3-2), the hollow cylindrical vibrator (3-3) and the lower spring (3-4) are sequentially sleeved on the cylindrical rod body (3-6) from top to bottom, the upper end (3-1) of the vibration absorber is connected with the upper end of the upper spring (3-2), and the lower end (3-5) of the vibration absorber is connected with the lower end of the lower spring (3-4).

5. The experimental facility of the surrounding type local resonance light lattice sandwich plate structure of claim 3 or 4, wherein: the cylindrical vibrator (3-3) is a hollow cylinder.

Technical Field

The invention relates to an experimental device of a lattice sandwich plate structure, in particular to an experimental device of a surrounding type local resonance light lattice sandwich plate structure, and belongs to the technical field of mechanical experimental devices.

Background

The acoustic metamaterial is a phononic crystal (periodic structure) based on a local resonance mechanism, and the interior of the phononic crystal contains mechanical or electromechanical resonance elements which are periodically arranged, so that the acoustic metamaterial has the functions of dissipating, absorbing and converting vibration and noise energy. The acoustic metamaterial can generate a low-frequency band gap and has the special function of controlling large-wavelength low-frequency vibration and noise by a small-size structure. The lattice sandwich type acoustic metamaterial has the excellent characteristics of light weight, high strength and the like, the local resonance type acoustic metamaterial can achieve the purpose of obtaining a low-frequency band gap by using small-size lattices, the existing acoustic metamaterial structure cannot achieve the characteristics of light weight, high strength and low-frequency forbidden band formation, and the vibration control effect is poor.

Disclosure of Invention

The invention provides an experimental device for a surrounding type local resonance light dot matrix sandwich plate structure, aiming at solving the problems that the traditional dot matrix sandwich structure can not control the transmission of low-frequency elastic waves and a local resonance type acoustic metamaterial does not have large rigidity and large mass.

The technical scheme adopted by the invention for solving the problems is as follows:

the novel LED lamp comprises an upper plate body, a lower plate body and a plurality of supporting units, wherein the upper plate body and the lower plate body are sequentially and horizontally arranged from top to bottom, and the plurality of supporting units are arranged between the lower surface of the upper plate body and the upper surface of the lower plate body in a matrix shape.

Further, the number of rows of the matrix formed by the plurality of supporting units is M, the number of columns of the matrix formed by the plurality of supporting units is N, and M and N are both positive integers.

Further, each supporting unit is composed of four vibration absorber components, and the four vibration absorber components are arranged in a pyramid shape.

Furthermore, each vibration absorber component comprises an upper end of the vibration absorber, an upper spring, a cylindrical vibrator, a lower spring, a lower end of the vibration absorber and a cylindrical rod body, wherein the upper spring, the hollow cylindrical vibrator and the lower spring are sequentially sleeved on the cylindrical rod body from top to bottom, the upper end of the vibration absorber is connected with the upper end of the upper spring, and the lower end of the vibration absorber is connected with the lower end of the lower spring.

Further, the cylindrical vibrator is a hollow cylinder.

The invention has the beneficial effects that:

1. the invention adopts a double-layer plate structure, compared with the traditional beam structure and a single-layer plate structure, the bearing capacity is better, and the hollow structure in the middle of the double-layer plate ensures that the whole metamaterial plate has the characteristics of light weight and high strength;

2. the lattice sandwich and the local resonance type acoustic metamaterial (the vibration absorber component) are combined, so that the structure has higher strength and stability and can also realize the inhibition effect on low-frequency vibration;

3. by changing the rigidity of the spring outside the cylindrical rod body and the mass of the hollow cylindrical vibrator, forbidden bands with different positions and different widths can be obtained, and further the relation between the forbidden bands and the rigidity and weight of the vibration absorber can be researched;

4. the band gap measurement and adjustment of the metamaterial plates made of different materials can be researched by assembling the upper plate body and the lower plate body with different material parameters;

5. the invention has simple structure, convenient adjustment, easy acquisition of materials such as carbon fiber, stainless steel and the like used for manufacturing, low manufacturing cost, energy saving, environmental protection, resource saving and cost saving for scientific research.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a right side view of FIG. 2;

figure 5 is a front view of the vibration absorber assembly;

FIG. 6 is a top view of FIG. 5;

FIG. 7 is a left side view of FIG. 5;

FIG. 8 is a front view of a cylindrical vibrator;

fig. 9 is a top view of fig. 8.

Detailed Description