阅读说明：本技术 一种多频段减振的新型周期金字塔点阵超材料梁结构 (Novel periodic pyramid lattice metamaterial beam structure with multi-frequency-band vibration reduction ) 是由 柴玉阳 李凤明 宋智广 于 2020-06-15 设计创作，主要内容包括：一种多频段减振的新型周期金字塔点阵超材料梁结构,本发明涉及一种超材料梁结构,本发明为解决传统金字塔点阵梁结构减振和降噪效果不理想的问题,本发明包括上板体、下板体、支撑组件和多个减振组件,上板体和下板体均是长条形板体,且上板体和下板体由上至下依次水平设置,多个所述支撑组件呈一字形设置在上板体的下表面和下板体的上表面之间,且每个所述支撑组件的上端与上板体的下表面固定连接,每个所述支撑组件的下端与下板体的上表面固定连接,每个所述支撑组件内均设有一个所述减振组件。本发明属于工程减振降噪技术领域。(The invention relates to a novel periodic pyramid lattice metamaterial beam structure with multi-frequency band vibration reduction, which relates to a metamaterial beam structure and aims to solve the problem that the vibration reduction and noise reduction effects of the traditional pyramid lattice beam structure are not ideal. The invention belongs to the technical field of engineering vibration reduction and noise reduction.)

1. The utility model provides a novel cycle pyramid dot matrix metamaterial beam structure of multifrequency section damping which characterized in that: the utility model provides a novel cycle pyramid dot matrix metamaterial beam structure of multifrequency section damping includes plate body (1), lower plate body (2), supporting component and a plurality of damping subassembly, goes up plate body (1) and lower plate body (2) and all is rectangular shape plate body, and goes up plate body (1) and lower plate body (2) and from top to bottom level setting in proper order, a plurality of supporting component is the font and sets up between the lower surface of last plate body (1) and the upper surface of lower plate body (2), and every supporting component's upper end and the lower fixed surface of last plate body (1) are connected, every supporting component's lower extreme and the last fixed surface of lower plate body (2) are connected, every all be equipped with one in the supporting component damping subassembly.

2. The novel periodic pyramid lattice metamaterial beam structure for multiband damping according to claim 1, wherein: each supporting component is of a pyramid structure consisting of four supporting rods (3), the upper end of each supporting rod (3) is fixedly connected with the lower surface of the upper plate body (1), and the lower end of each supporting rod (3) is fixedly connected with the upper surface of the lower plate body (2).

3. The novel periodic pyramid lattice metamaterial beam structure with multi-band vibration damping according to claim 1 or 2, wherein: every damping component includes cylinder quality piece (4) and rubber column (5), and rubber column (5) set up in the pyramid structure, and the lower extreme of rubber column (5) and the last fixed surface who descends plate (2) be connected, cylinder quality piece (4) fixed mounting is in the upper end of rubber column (5).

4. The novel periodic pyramid lattice metamaterial beam structure for multiband damping according to claim 3, wherein: the rubber column (5) is a cylindrical rubber sheet.

5. The novel periodic pyramid lattice metamaterial beam structure for multiband damping according to claim 3, wherein: the cylindrical mass block (4) is a steel solid cylinder.

6. The novel periodic pyramid lattice metamaterial beam structure for multiband damping according to claim 5, wherein: the radius of the cylindrical mass block (4) is twice of that of the rubber column (5).

Technical Field

The invention relates to a metamaterial beam structure, in particular to a novel periodic pyramid lattice metamaterial beam structure with multi-frequency-band vibration reduction, and belongs to the technical field of engineering vibration reduction and noise reduction.

Background

The pyramid lattice structure has wide application prospect in the aerospace field due to the characteristics of high specific strength, high specific stiffness, low density and the like. Along with the continuous deepening of the flight environment complexity of the aircraft, in the structural design of the aircraft, the vibration reduction and noise reduction performance is also an important index for measuring the practicability of the lattice structure. The vibration reduction and noise reduction effects of the traditional pyramid lattice beam structure are not ideal.

Disclosure of Invention

The invention provides a novel periodic pyramid lattice metamaterial beam structure with multi-frequency-band vibration reduction, aiming at solving the problem that the vibration reduction and noise reduction effects of the traditional pyramid lattice beam structure are not ideal.

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

a novel cycle pyramid dot matrix metamaterial beam structure of multifrequency section damping includes plate body, lower plate body, supporting component and a plurality of damping subassembly, goes up the plate body and all is rectangular shape plate body down, and goes up the plate body and down the plate body from top to bottom level setting in proper order, and is a plurality of supporting component is a font setting between the lower surface of last plate body and the upper surface of lower plate body, and every supporting component's upper end and the lower fixed surface of last plate body are connected, every supporting component's lower extreme and the last fixed surface of plate body down are connected, every all be equipped with one in the supporting component damping subassembly.

Furthermore, each support assembly is a pyramid structure formed by four support rods, the upper end of each support rod is fixedly connected with the lower surface of the upper plate body, and the lower end of each support rod is fixedly connected with the upper surface of the lower plate body.

Further, every damping component includes cylinder quality piece and rubber column, and the rubber column setting is in the pyramid structure, and the lower extreme of rubber column and the upper surface fixed connection of lower plate body, cylinder quality piece fixed mounting is in the upper end of rubber column.

Further, the rubber column is a cylindrical rubber sheet.

Further, the cylinder mass block is a solid steel cylinder.

Further, the radius of the cylindrical mass block is twice of that of the rubber column.

The invention has the beneficial effects that:

1. the pyramid lattice base beam is integrally formed by adopting a 3D printing technology, so that the accuracy of the experiment is ensured;

2. the pyramid lattice foundation beam and the rubber column bonding surface and the rubber column and the cylindrical mass block bonding surface are ensured to be stably connected, so that corresponding displacement is coordinated and continuous.

3. According to the invention, by installing the rubber column and cylindrical mass block combined vibrator structure, the range of the vibration band gap of the structure is enlarged, and better vibration and noise reduction effects are achieved.

4. The invention can couple the local resonance band gap and the Bragg band gap by changing the size and the installation position parameters of the mass block, thereby realizing the multi-band vibration reduction of the pyramid lattice beam structure and obtaining good vibration reduction effect in different frequency ranges.

5. The materials required by the invention are common materials, so the invention has low cost and is easy to popularize and apply on engineering structures.

Drawings

FIG. 1 is a front view of the overall construction of the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a perspective view of FIG. 1;

FIG. 5 is a front view of a unit cell;

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

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

FIG. 8 is a perspective view of FIG. 5;

FIG. 9 is a graph of a vibration band gap of a novel periodic pyramid array metamaterial beam;

FIG. 10 is a displacement cloud for a structure at different external excitation frequencies.

Detailed Description