CN111503203A - Experimental device for cladding type local resonance light dot matrix sandwich panel structure - Google Patents

Experimental device for cladding type local resonance light dot matrix sandwich panel structure Download PDF

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Publication number
CN111503203A
CN111503203A CN202010240962.XA CN202010240962A CN111503203A CN 111503203 A CN111503203 A CN 111503203A CN 202010240962 A CN202010240962 A CN 202010240962A CN 111503203 A CN111503203 A CN 111503203A
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China
Prior art keywords
variable cross
section vibrator
vibrator
section
vibration absorber
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Pending
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CN202010240962.XA
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Chinese (zh)
Inventor
李金强
范鑫磊
张垚
李凤鸣
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Harbin Engineering University
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Harbin Engineering University
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Priority to CN202010240962.XA priority Critical patent/CN111503203A/en
Publication of CN111503203A publication Critical patent/CN111503203A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
    • F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
    • F16F2228/04—Frequency effects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
    • F16F2228/06—Stiffness
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/0047—Measuring, indicating

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Building Environments (AREA)

Abstract

The invention relates to an experimental device of a coated local resonance light dot matrix sandwich plate structure, which relates to an experimental device and aims to solve the problems that the existing acoustic metamaterial structure cannot realize the characteristics of light weight, high strength and low frequency forbidden band formation and has poor vibration control effect. The invention belongs to the technical field of mechanical experiment devices. The lattice sandwich and vibration absorber component has higher strength and stability, and can also realize the inhibition effect on low-frequency vibration.

Description

Experimental device for cladding type local resonance light dot matrix sandwich panel structure
Technical Field
The invention relates to an experimental device of a dot matrix sandwich panel structure, in particular to an experimental device of a coated local resonance light dot matrix sandwich panel 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, and the local resonance type acoustic metamaterial can achieve the purpose of obtaining a low-frequency band gap by using small-size lattices, namely 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 cladding type local resonance light dot matrix sandwich plate structure, aiming at solving the problems that the existing acoustic metamaterial structure cannot realize the characteristics of light weight, high strength and low frequency forbidden band formation and has poor vibration control effect.
The technical scheme adopted by the invention for solving the problems is as follows:
the experimental device of the coated local resonance light dot matrix sandwich plate structure also comprises a plurality of supporting units, wherein 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.
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 vibration absorber component are combined, so that the structure has higher strength and stability and can realize the inhibition effect on low-frequency vibration;
3. by changing the spring stiffness in the hollow tube and the mass of the variable cross-section vibrator, forbidden bands with different positions and different widths can be obtained, and further the relation between the forbidden bands and the stiffness 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 schematic view of the structure of the vibration absorber assembly;
figure 6 is a front view of the vibration absorber assembly;
FIG. 7 is a top view of FIG. 6;
FIG. 8 is a front view of a variable cross-section cylindrical vibrator;
fig. 9 is a top view of fig. 8.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 9, and the experimental device of the coated local resonance light dot matrix sandwich panel structure according to the embodiment includes an upper panel body 1 and a lower panel body 2, wherein the upper panel body 1 and the lower panel body 2 are sequentially and horizontally arranged from top to bottom, the experimental device of the coated local resonance light dot matrix sandwich panel structure further includes a plurality of supporting units 3, and the plurality of supporting units 3 are arranged between the lower surface of the upper panel body 1 and the upper surface of the lower panel body 2 in a matrix shape.
The upper plate body 1 and the lower plate body 2 form a double-layer plate structure, and the double-layer plate structure has more excellent bearing performance, wherein the supporting unit 3 is connected with the upper plate body and the lower plate body in a bonding mode. The lower surface of the upper plate body 1 and the upper surface of the lower plate body 2 are provided with a plurality of connection points along the length and width directions thereof, each connection point corresponding to the upper end or the lower end of each vibration absorber assembly.
The second embodiment is as follows: the present embodiment is described with reference to fig. 1 to 4, where the number of rows of the matrix formed by the plurality of supporting units 3 is M, the number of columns of the matrix formed by the plurality of supporting units 3 is N, and M and N are both positive integers. The operator can select the number of the supporting units 3 according to different experimental requirements to achieve the best experimental effect.
Other components and connections are the same as those in the first embodiment.
The third concrete implementation mode: referring to fig. 3, the present embodiment will be described, in which each of the supporting units 3 is composed of four vibration absorber elements, and the four vibration absorber elements are arranged in a pyramid shape.
Other components are connected in the same manner as in the first or second embodiment.
The fourth concrete implementation mode: the embodiment is described with reference to fig. 5 to 7, each vibration absorber component in the embodiment comprises an upper end 3-1 of the vibration absorber, an upper spring 3-2, a variable cross-section vibrator 3-3, a lower spring 3-4, a lower end 3-5 of the vibration absorber and a hollow cylindrical tube 3-6, wherein the upper spring 3-2, the hollow variable cross-section vibrator 3-3 and the lower spring 3-4 are sequentially inserted into the hollow cylindrical tube 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 of the vibration absorber, and the lower end 3-5 of the vibration absorber is connected with the lower end of the lower spring 3-4.
The lengths and the rigidities of the upper spring 3-2 and the lower spring 3-4 can be adjusted to obtain the supporting units 3 with different lengths and different rigidities, so that forbidden bands with different positions and different widths can be obtained by changing the natural frequency of the supporting units 3, and the relation between the forbidden bands and the natural frequency of the vibration absorber can be researched;
by changing the weight of the variable cross-section vibrator 3-3, forbidden bands with different positions and different widths can be obtained, and the relation between the forbidden bands and the proportion of the vibration absorber can be further researched.
Other components and connection relationships are the same as those in the first, second or third embodiment.
The fifth concrete implementation mode: the variable cross-section vibrator 3-3 comprises a variable cross-section vibrator upper end 3-3-1, a variable cross-section vibrator middle end 3-3-2 and a variable cross-section vibrator lower end 3-3-3, wherein the variable cross-section vibrator upper end 3-3-1, the variable cross-section vibrator middle end 3-3-2 and the variable cross-section vibrator lower end 3-3-3 are coaxially arranged from top to bottom in sequence.
Other components and connections are the same as those of the first, second, third or fourth embodiments.
The fifth concrete implementation mode: this embodiment will be described with reference to fig. 8 and 9, and the following description of this embodiment: the upper end 3-3-1, the middle end 3-3-2 and the lower end 3-3-3 of the variable cross-section vibrator are all cylinders, the cross sections of the upper end 3-3-1 and the lower end 3-3-3 of the variable cross-section vibrator are the same, and the cross section of the middle end 3-3-2 of the variable cross-section vibrator is larger than the cross sections of the upper end 3-3-1 and the lower end 3-3-3 of the variable cross-section vibrator.
The vibrator is designed into different sections, so that the upper end 3-3-1 of the vibrator and the lower end 3-3-3 of the vibrator can be better matched with the spring.
The working principle is as follows:
based on the local resonance principle, sinusoidal excitation is applied to one point on the surface of the metamaterial plate during the experiment, the frequency of the sinusoidal excitation is adjusted in the experiment process, when the excitation frequency reaches the natural frequency of the vibration absorber structure, the vibration absorber structure can generate vibration with specific frequency, the vibration of the vibration absorber structure and the sinusoidal excitation vibration of the surface structure of the plate are influenced mutually, and the effects of absorbing and dissipating vibration energy are achieved.
In the experimental process, the band gaps of the metamaterial plates can be adjusted through parametric design to obtain band gaps with different frequencies and wider bandwidths, so that the adjustability of the band gaps is increased, and the propagation of vibration or elastic waves is controlled. The specific operation is as follows: in the experiment, when the length, the rigidity and the material of the upper spring 3-2 and the weight of the lower spring 3-4 are ensured to be the same as each other, the upper plate body 1 and the lower plate body 2 which are made of different materials and have different thicknesses are replaced, and band gaps with the same initial frequency and different widths can be obtained; when the length, thickness and material of the upper plate body 1 and the lower plate body 2 are the same, and the length, rigidity and the like of the upper spring 3-2 and the lower spring 3-4 are the same, the variable cross-section vibrators 3-3 with different weights are replaced, so that band gaps with different initial frequencies and different widths can be obtained, and the quality of the structure of the vibration absorber is essentially changed, so that the inherent frequency of the structure of the vibration absorber is changed, and the effect of adjusting the band gaps is achieved; when the upper plate body 1, the lower plate body 2 and the variable cross-section vibrator 3-3 are ensured to be the same, the upper spring 3-2 and the lower spring 3-4 with different lengths or different rigidities are replaced, so that band gaps with different initial frequencies and the same width can be obtained, and the intrinsic frequency of the vibration absorber structure is changed, so that the effect of adjusting the band gaps is achieved.
Through the experimental device structure of the cladding type local resonance light dot matrix sandwich plate structure, the rigidity of the structure is greatly improved, the weight is reduced, and meanwhile, elastic waves which are transmitted along the plate surface at specific frequencies can be effectively restrained. Compared with the traditional local resonance type acoustic metamaterial, the structure has the advantages of thin thickness, high strength, light weight, low cost, convenience in utilization and the like.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (6)

1. The utility model provides an experimental apparatus of cladding type local resonance light dot matrix sandwich panel structure, 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 cladding 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 clad local resonance light dot matrix sandwich panel structure according to 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 clad local resonance light dot matrix sandwich panel structure according to 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 cladding type local resonance light lattice sandwich plate structure as claimed in claim 3, wherein: each vibration absorber component comprises an upper end (3-1) of the vibration absorber, an upper spring (3-2), a variable cross-section vibrator (3-3), a lower spring (3-4), a lower end (3-5) of the vibration absorber and a hollow cylindrical pipe (3-6), wherein the upper spring (3-2), the hollow variable cross-section vibrator (3-3) and the lower spring (3-4) are sequentially inserted into the hollow cylindrical pipe (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) of the vibration absorber, 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 clad local resonance light dot matrix sandwich panel structure according to claim 3 or 4, wherein: the variable cross-section vibrator (3-3) comprises a variable cross-section vibrator upper end (3-3-1), a variable cross-section vibrator middle end (3-3-2) and a variable cross-section vibrator lower end (3-3-3), and the variable cross-section vibrator upper end (3-3-1), the variable cross-section vibrator middle end (3-3-2) and the variable cross-section vibrator lower end (3-3-3) are coaxially arranged from top to bottom in sequence.
6. The experimental facility of the cladding type local resonance light lattice sandwich plate structure of claim 5, wherein: the upper end (3-3-1) of the variable cross-section vibrator, the middle end (3-3-2) of the variable cross-section vibrator and the lower end (3-3-3) of the variable cross-section vibrator are all cylinders, the cross sections of the upper end (3-3-1) of the variable cross-section vibrator and the lower end (3-3-3) of the variable cross-section vibrator are the same, and the cross section of the middle end (3-3-2) of the variable cross-section vibrator is larger than that of the upper end (3-3-1) of the variable cross-section vibrator and that of the lower end (3-3-3) of the variable cross-.
CN202010240962.XA 2020-03-30 2020-03-30 Experimental device for cladding type local resonance light dot matrix sandwich panel structure Pending CN111503203A (en)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004092112A (en) * 2002-08-30 2004-03-25 Sekisui House Ltd Floor vibration damping device
CN206582279U (en) * 2017-03-28 2017-10-24 北京金风科创风电设备有限公司 Powered shock absorption device, blade and wind power generating set for wind power generating set
CN107813548A (en) * 2017-10-18 2018-03-20 天津理工大学 A kind of truss core structure with high resistance to shock
CN108119588A (en) * 2017-12-21 2018-06-05 西北工业大学 A kind of low frequency wideband vibration suppression structure based on binary cycle forbidden band characteristic
CN109263165A (en) * 2018-10-26 2019-01-25 西南交通大学 A kind of middle low frequency suction vibration isolation metamaterial of multiband selected control
US20190035373A1 (en) * 2015-09-11 2019-01-31 Component Technologies, L.L.C. Acoustic meta-material basic structure unit, composite structure thereof, and assembly method
CN109334776A (en) * 2018-11-16 2019-02-15 清华大学苏州汽车研究院（相城） A kind of automobile dash board based on acoustic metamaterial
CN109572070A (en) * 2019-01-04 2019-04-05 西安交通大学 A kind of foam filling hollow round tube pyramid dot-matrix sandwich panel and preparation method thereof
CN110595993A (en) * 2019-09-19 2019-12-20 哈尔滨工程大学 Experimental device containing acoustic metamaterial plate with convex vibration absorbers
CN111505127A (en) * 2020-03-30 2020-08-07 哈尔滨工程大学 Experimental device for surrounding type local resonance light dot matrix sandwich plate structure

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004092112A (en) * 2002-08-30 2004-03-25 Sekisui House Ltd Floor vibration damping device
US20190035373A1 (en) * 2015-09-11 2019-01-31 Component Technologies, L.L.C. Acoustic meta-material basic structure unit, composite structure thereof, and assembly method
CN206582279U (en) * 2017-03-28 2017-10-24 北京金风科创风电设备有限公司 Powered shock absorption device, blade and wind power generating set for wind power generating set
CN107813548A (en) * 2017-10-18 2018-03-20 天津理工大学 A kind of truss core structure with high resistance to shock
CN108119588A (en) * 2017-12-21 2018-06-05 西北工业大学 A kind of low frequency wideband vibration suppression structure based on binary cycle forbidden band characteristic
CN109263165A (en) * 2018-10-26 2019-01-25 西南交通大学 A kind of middle low frequency suction vibration isolation metamaterial of multiband selected control
CN109334776A (en) * 2018-11-16 2019-02-15 清华大学苏州汽车研究院（相城） A kind of automobile dash board based on acoustic metamaterial
CN109572070A (en) * 2019-01-04 2019-04-05 西安交通大学 A kind of foam filling hollow round tube pyramid dot-matrix sandwich panel and preparation method thereof
CN110595993A (en) * 2019-09-19 2019-12-20 哈尔滨工程大学 Experimental device containing acoustic metamaterial plate with convex vibration absorbers
CN111505127A (en) * 2020-03-30 2020-08-07 哈尔滨工程大学 Experimental device for surrounding type local resonance light dot matrix sandwich plate structure

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Application publication date: 20200807