A periodic composite structure using corrugated plates as elastic connecting components

Abstract

The present invention relates to a periodic composite structure using a folded plate as an elastic connecting member, comprising a plurality of basic units, wherein the plurality of basic units are arranged in a two-dimensional coordinate system. x , y direction to form a periodic arrangement; each basic unit includes two corrugated plates, an oscillator and a bottom plate, the two corrugated plates are relatively combined and arranged on the bottom plate, and a barrel-shaped cavity is formed between the two corrugated plates, and the oscillator is placed above the barrel-shaped cavity; the periodic composite structure can be regarded as a local resonance type phononic crystal, which has an elastic wave band gap and a low band gap frequency.

Description

Technical Field

[0001] The invention relates to a periodic composite structure using a corrugated plate as an elastic connecting component, and belongs to the field of vibration reduction. Background Art

[0002] The theory of phononic crystals originates in the field of condensed matter solid-state physics. Over its nearly 30 years of development, it has attracted the attention of numerous scholars, offering a novel approach to vibration and noise reduction research. Phononic crystals are periodic composite materials or structures composed of two or more materials arranged in a periodic pattern, forming a bandgap. Elastic waves within this bandgap frequency range are prevented from propagating.

[0003] Currently, phononic crystal theory has been successfully introduced into engineering structural components, resulting in the formation of bandgap periodic beams, periodic plates, and thin-film acoustic metamaterials, providing a foundation for the vibration and noise reduction design of engineering structures. Phononic crystals can be categorized as scattering phononic crystals and localized resonance phononic crystals. Scattering phononic crystals generally require the wavelength of elastic waves to be comparable to their lattice constant, while the wavelength of elastic waves in localized resonance phononic crystals can be smaller than the lattice constant. When the lattice constant is less than 1 / 10 of the wavelength, such phononic crystals are called subwavelength structures. Localized resonance phononic crystals have lower band gap frequencies than scattering phononic crystals of the same size. Summary of the Invention

[0004] The present invention provides a periodic composite structure using a folded plate as an elastic connecting component. The periodic composite structure can be regarded as a local resonance type phononic crystal, has an elastic wave band gap, and the band gap frequency is low.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A periodic composite structure using a corrugated plate as an elastic connecting member includes a plurality of basic units, wherein the basic units are periodically arranged in the x and y directions of a two-dimensional coordinate system;

[0007] Each basic unit includes two corrugated plates, a vibrator and a bottom plate. The two corrugated plates are arranged on the bottom plate relative to each other, and a barrel-shaped cavity is formed between the two corrugated plates. The vibrator is placed above the barrel-shaped cavity.

[0008] As a further preferred embodiment of the present invention, the invention further comprises an elastic lightweight filler, which is arranged at the bottom of the barrel-shaped cavity, and the vibrator is placed above the elastic lightweight filler;

[0009] As a further preferred embodiment of the present invention, the vibrator is made of concrete, reinforced concrete, lead, tin or copper;

[0010] As a further preferred embodiment of the present invention, the aforementioned corrugated plate is made of steel, aluminum alloy or FRP composite material;

[0011] As a further preferred embodiment of the present invention, the bottom plate is made of a concrete plate, a reinforced concrete plate, a steel plate, a lead plate, or a tungsten plate;

[0012] As a further preferred embodiment of the present invention, the aforementioned elastic lightweight filler is made of foamed concrete, rubber, foam or plastic;

[0013] As a further preferred embodiment of the present invention, a steel plate parallel to the bottom plate is installed in the barrel-shaped cavity formed by the two corrugated plates, dividing the barrel-shaped cavity into two parts, an upper part and an lower part, and a vibrator is installed above the steel plate;

[0014] The steel plate is fixed to the barrel-shaped cavity by welding or bolts.

[0015] Through the above technical solution, compared with the existing technology, the present invention has the following beneficial effects:

[0016] 1. The periodic composite structure of the present invention is made of common and inexpensive building materials such as concrete, steel, and rubber, which reduces manufacturing costs and improves economic performance;

[0017] 2. The periodic composite structure of the present invention is simple to manufacture, and the connection method is technically mature and suitable for a wide range of applications;

[0018] 3. The periodic composite structure of the present invention constitutes a local resonance type phononic crystal plate, thereby realizing the formation of a low-frequency elastic wave band gap using a small-sized structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and examples.

[0020] Figure 1 It is a schematic diagram of the extension process of a basic unit provided by the present invention;

[0021] Figure 2 It is an exploded schematic diagram of a basic unit provided by the present invention;

[0022] Figure 3 This is a preferred embodiment provided by the present invention.

[0023] In the figure: 1 is the vibrator, 2 is the corrugated plate, 3 is the elastic lightweight filler, 4 is the bottom plate, 5 is the reinforced concrete slab, and 6 is the bearing foundation. DETAILED DESCRIPTION

[0024] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0025] The present application aims to provide a composite structure that uses corrugated plates as elastic connecting components and arranges them in a periodic manner, thereby forming a local resonance type phononic crystal plate, and realizing the formation of a low-frequency elastic wave band gap using a small-sized structure.

[0026] This application includes several basic units, which are extended in the x and y directions of the two-dimensional coordinate system to form a periodic composite structure. Figure 1 , which is a schematic diagram of a basic unit extension process performed in the present application, that is, a schematic diagram of the extension of a basic unit of the periodic composite structure in the xy plane is given;

[0027] Figure 2 As shown, a schematic diagram of the decomposition of one of the basic units is given, including two corrugated plates 2, an oscillator 1, an elastic lightweight filler 3 and a bottom plate 4. The two corrugated plates 2 are relatively merged and arranged on the bottom plate 4. The two corrugated plates 2 can be fixedly connected by welding or bolts, and a barrel-shaped cavity is formed between the two corrugated plates 2. The elastic lightweight filler 3 is arranged at the bottom of the barrel-shaped cavity, and the oscillator 1 is placed above the elastic lightweight filler 3. It should be noted here that the elastic lightweight filler 3 is only a filling function to ensure that the position of the oscillator 1 is always above the barrel-shaped cavity; the corrugated plate 2, that is, the corrugated plate, is similar to a spring as an elastic connecting member, connecting the oscillator 1 and the bottom plate 4, forming a local resonance type phononic crystal;

[0028] In this application, the bottom plate 4 can be made of a concrete plate or a reinforced concrete plate 5 or a steel plate or a lead plate or a tungsten plate, and the corrugated plate 2 can be made of steel or an aluminum alloy material or an FRP composite material or other materials with good elasticity. When the bottom plate 4 is a steel plate, the corrugated plate 2 can be connected to the bottom plate 4 by welding; when the bottom plate 4 is a concrete plate or a reinforced concrete plate 5, the corrugated plate 2 and the bottom plate 4 can adopt the connection method commonly used in corrugated steel web composite bridges.

[0029] In the present application, the vibrator 1 is made of concrete, reinforced concrete, lead, tin, copper, or other high-density materials; the elastic lightweight filler 3 is made of foamed concrete, rubber, foam, or plastic.

[0030] In order to ensure the position of the vibrator 1, a steel plate parallel to the bottom plate 4 can be installed in the barrel-shaped cavity formed by the two corrugated plates 2, dividing the barrel-shaped cavity into two parts, upper and lower parts, and the vibrator 1 is installed at a position above the barrel-shaped cavity. The steel plate can support the weight of the upper vibrator 1. At this time, no filling material is required under the vibrator 1; the steel plate can be fixed by welding or bolts.

[0031] Implementation Cases:

[0032] Figure 3 An embodiment of applying the composite structure of the present application is given, in which two composite structures are relatively placed on a certain bearing foundation 6, that is, the composite structure of the present application has the base plate 4 vertically installed on the bearing foundation 6, and the relatively arranged composite structures are consolidated by the reinforced concrete slab 5 shown in the figure. A building is constructed on the reinforced concrete slab 5, and this frame structure becomes a foundation with a vibration isolation effect. At the same time, the frame structure can be extended in the x and y directions to form a large vibration isolation foundation; the vibration isolation foundation formed by the implementation case can weaken the vibration within the band gap frequency in the xy plane, and also has a weakening effect on the vibration within the band gap frequency in the z direction.

[0033] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and, unless defined as such herein, will not be interpreted in an idealized or overly formal sense.

[0034] The meaning of "and / or" in this application means that both situations where each exists alone or both exist at the same time are included.

[0035] The term “connection” as used in this application may mean a direct connection between components or an indirect connection between components via other components.

[0036] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A periodic composite structure using a corrugated plate as an elastic connecting member, characterized in that: It includes a plurality of basic units, and the plurality of basic units are periodically arranged in the x and y directions of a two-dimensional coordinate system; Each basic unit includes two corrugated plates, a vibrator and a bottom plate. The two corrugated plates are arranged on the bottom plate in a relative manner and a barrel-shaped cavity is formed between the two corrugated plates. The vibrator is arranged above the barrel-shaped cavity.

2. The periodic composite structure using the corrugated plate as the elastic connecting member according to claim 1, characterized in that: The invention also comprises an elastic light filler which is arranged at the bottom of the barrel-shaped cavity, and the vibrator is arranged above the elastic light filler.

3. The periodic composite structure using the corrugated plate as the elastic connecting member according to claim 1, characterized in that: The aforementioned vibrator is made of concrete or reinforced concrete or lead or tin or copper.

4. The periodic composite structure using the corrugated plate as an elastic connecting member according to claim 1, characterized in that: The aforementioned corrugated plate is made of steel or aluminum alloy or FRP composite material.

5. The periodic composite structure using the corrugated plate as the elastic connecting member according to claim 1, characterized in that: The aforementioned bottom plate is made of concrete plate, reinforced concrete plate, steel plate, lead plate or tungsten plate.

6. The periodic composite structure using the corrugated plate as the elastic connecting member according to claim 2, characterized in that: The aforementioned elastic lightweight filler is made of foamed concrete or rubber or foam or plastic.

7. The periodic composite structure using the corrugated plate as an elastic connecting member according to claim 1, characterized in that: A steel plate parallel to the bottom plate is installed in the barrel-shaped cavity formed by the two corrugated plates, the barrel-shaped cavity is divided into two parts, an upper part and an lower part, and a vibrator is installed above the steel plate; The steel plate is fixed to the barrel-shaped cavity by welding or bolts.

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