CN106907418B - Phonon crystal negative poisson's ratio honeycomb vibration isolation anti-impact device - Google Patents

Phonon crystal negative poisson's ratio honeycomb vibration isolation anti-impact device Download PDF

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Publication number
CN106907418B
CN106907418B CN201710042535.9A CN201710042535A CN106907418B CN 106907418 B CN106907418 B CN 106907418B CN 201710042535 A CN201710042535 A CN 201710042535A CN 106907418 B CN106907418 B CN 106907418B
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negative poisson
honeycomb core
ratio
vibration
ratio honeycomb
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CN106907418A (en
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杨德庆
秦浩星
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Shanghai Jiaotong University
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Shanghai Jiaotong University
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00Vibration-dampers; Shock-absorbers
    • F16F7/12Vibration-dampers; Shock-absorbers using plastic deformation of members
    • F16F7/121Vibration-dampers; Shock-absorbers using plastic deformation of members the members having a cellular, e.g. honeycomb, structure

Abstract

The present invention provides a kind of phonon crystal negative poisson's ratio honeycomb vibration isolation anti-impact devices, it further include lead (4), the rubber block (5) after bonding is integral in insertion cellular unit including vibration isolator top panel (1), the vibration isolator lower panel (2), negative poisson's ratio honeycomb core (3) by being welded to connect.The device lower panel is bolted with floor, and mechanical equipment is placed on above, is connected with.Customized parameter of the present invention is wide, the thickness including upper and lower panel, the number of plies, angle, wall thickness and rubber block and the thickness of lead of honeycomb core etc..By the size of change lead and rubber block, it can be achieved that the effectiveness in vibration suppression of assigned frequency point dynamic response.With preferable effectiveness in vibration suppression, and it is suitable for solving low frequency Vibration, and there are wider vibration damping band gap properties in low-frequency range, the heavy inefficient disadvantage of traditional equipment pedestal is overcome, is that new field has been opened up in utilization of the phonon crystal combination negative poisson's ratio honeycomb in engineering.

Description

Phonon crystal negative poisson's ratio honeycomb vibration isolation anti-impact device
Technical field
The present invention relates to vibration isolation anti-impact devices, more particularly to a kind of phonon crystal negative poisson's ratio honeycomb vibration isolation shock resistance Device.
Background technique
Exploitation efficient light vibration isolation anti-impact device is the forward position class of mechanical equipment noise and vibration comfort design studies Topic.Traditional vibration isolation anti-impact device mainly has single-layer partiting polarization system, double-layer vibration isolating system and buoyant raft shock-resistant system etc..
Since single-layer partiting polarization system is simple and effective, it is widely used in engineering, but it has distinct disadvantage: (1) works as machine When the forcing frequency of device is lower, vibration isolator rigidity must be designed very little, and system stability is poor;(2) equipment is non-rigid, vibration isolator High frequency standing wave effect and basis nonrigid synthesis result transport curve is tilted upward in high frequency, and occur very much Formant, to reduce the vibration isolating effect of high frequency region.
Double-layer vibration isolating system also needs to provide necessary to the vibration isolating effect obtained other than it need to configure vibration isolator meticulously Intermediate mass, to reach required mass ratio.It usually requires that mass ratio is greater than 0.5, preferably up to 0.8, provides in excessive Between the expense of quality be uneconomical and objectionable, to limit the application of double-layer vibration isolating system.
It for buoyant raft shock-resistant system, says from the general extent, this, which is one, has distributed mass, distribution elasticity and distribution resistance The physical system of Buddhist nun, thus be a continuous parameter system, the Exact that obtain the system is very difficult.Exist at this stage In buoyant raft design, calculating the accurate nonrigid influence of consideration pedestal using theory analysis or numerical value, there is also tired in technical treatment Difficulty generally requires to obtain necessary data by means of actual measurement, considerably increases device development cost and period.
In addition to this, currently used equipment elasticity mounting means, either single layer, bilayer or buoyant raft, all belong to Passive type vibration isolation, low-frequency range can fail.
In addition, above-mentioned various traditional isolation mountings are primarily adapted for use in the vibration problem of medium, high frequency, but for low-frequency range Effectiveness in vibration suppression is bad.
It is retrieved, finds following related Chinese patent literature.
Patent document A: bulletproof sandwich plate, application number 201210225023.3, publication number 102717542A.Patent The shortcoming of document A is: its sandwich plate proposed can not be used as load-carrying construction, only have safeguard function.Therefore, work as work When work is positioned as load purposes, solves the problems, such as load, laminate should be added not account for structural strength problem and only focus on antiknock effect Fruit, structural strength not can solve load problem, and application surface is narrow.
Patent document B: bionical negative poisson's ratio material and preparation method thereof, application number 201210018190.0, publication number 103214728A.The shortcoming of patent document B is: it belongs to microcosmic design of material, and macrostructure, technical solution is not present It is not able to satisfy vibration damping, multinomial use and the design objective such as shock resistance (antiknock) and structural strength individually.
For the present invention compared with the scheme after patent document A and patent document B are combined, the present invention is the main vibration damping of macroscopic view Anti-impact device is not supplementary structure, nor microcosmic design of material.The present invention has comprehensively considered vibration damping, shock resistance (antiknock) And the multinomial use such as structural strength and design objective.It is selected by different structure type and material, plays all parts Attribute advantage enhances the overall performance of device.That is, composite material negative poisson's ratio honeycomb vibration damping dress proposed by the present invention Setting is primary load bearing equipment, and non-functional supplementary structure.Its use environment requires it with enough structural strengths, inner sealed board and outer The effect of sealing plate is exactly to increase the rigidity of structure, guarantees the safety and reliability used.The present invention is applicable to consider vibration damping All engineering fields of anti-impact index, application surface are extensive.
Technological difficulties of the invention are:
Difficult point 1: technological difficulties concentrate on processing and manufacturing aspect, and especially honeycomb manufactures.
Specific hardly possible exists: in certain installation space, with the increase of the honeycomb number of plies, cellular size also reduces therewith, Common welding manner, such as welding gun welding, welding gun can not be protruded into inside honeycomb core, not can guarantee the welding of honeycomb Quality is easy to appear desoldering situation.
The present invention solves manufacturing method used by the difficult point: the present invention is using vacuum brazing either monoblock cast Mode manufactures honeycomb core.
Difficult point 2: technological difficulties be honeycomb respectively with the connection method of upper and lower panel.
Specific hardly possible exists: due to honeycomb aperture very little, structure depth is again very big, it is difficult to ensure that with upper and lower panel and honeycomb core Welding quality.
Difficult point 3: technological difficulties are that the connection of rubber block and honeycomb core is installed.
Specific hardly possible exists: the size of honeycomb core and rubber block is smaller, and rubber block is embedded into honeycomb core by the way of insertion In, it is difficult to guarantee that rubber block is bonded completely with the cell element wall of the Cellular structure of negative poisson's ratio honeycomb core.
The present invention solves connection method used by the difficult point: the mode that vacuum brazing equally can be used solves honeycomb core With top panel, lower panel, in addition to vacuum brazing, it is also contemplated that gluing, structural strength can equally be guaranteed.For rubber The insertion of block and honeycomb core is installed, and can be manufactured the sectional dimension of rubber block at the shape of re-entrant angle in honeycomb core in order to install, So that rubber block is bonded completely with the cell element wall of the Cellular structure of negative poisson's ratio honeycomb core.
Summary of the invention
For the defects in the prior art, it is anti-that the object of the present invention is to provide a kind of phonon crystal negative poisson's ratio honeycomb vibration isolation Percussion mechanism, solves that current vibration isolation anti-impact device adjustment parameter is few, and device quality is big, and the problem of low frequency vibration isolation performance difference.
A kind of phonon crystal negative poisson's ratio honeycomb vibration isolation anti-impact device provided according to the present invention, including above vibration isolator Plate, vibration isolator lower panel, negative poisson's ratio honeycomb core, lead, rubber block;
Vibration isolator top panel, vibration isolator lower panel, negative poisson's ratio honeycomb core are sequentially connected;
Lead interconnected and rubber block are arranged in the Cellular structure of negative poisson's ratio honeycomb core.
Preferably, negative poisson's ratio honeycomb core, lead, rubber block constitute phonon crystal.
Preferably, the connection of the cell element wall of the Cellular structure of rubber block and negative poisson's ratio honeycomb core uses embedded mode;Lead The extending direction of block is parallel to the longitudinal direction of negative poisson's ratio honeycomb core;Lead is embedded in rubber block, the insertion of rubber Block- matching In the Cellular structure of negative poisson's ratio honeycomb core.
Preferably, negative poisson's ratio honeycomb core is welded to connect with vibration isolator top panel, vibration isolator lower panel constitutes entirety respectively Load equipment.
Preferably, vibration isolator top panel is mechanical equipment placed side;Floor can be bolted in vibration isolator lower panel.
Preferably, the Cellular structure Poisson's ratio of negative poisson's ratio honeycomb core is negative value, has auxetic effect.
Preferably, using vacuum brazing mode by vibration isolator top panel, vibration isolator lower panel respectively with negative poisson's ratio honeycomb Core connection.
Preferably, negative poisson's ratio honeycomb core is manufactured by the way of monoblock cast.
Compared with prior art, the present invention have it is following the utility model has the advantages that
1, present invention can assure that playing the role of vibration isolation anti-impact for the mechanical equipment in 10~1000Hz of working frequency, tool There are wider continuous damping band gap, and efficient and light weight, adjustment parameter is wide, greatly expands negative poisson's ratio honeycomb application neck Domain, while reducing use cost.
2, the present invention plays the role of vibration isolation anti-impact for the mechanical equipment in 10~100Hz of low-frequency range.
3, customized parameter of the present invention is wide, including above and below plate thickness, wall thickness, the number of plies and the angle of negative poisson's ratio honeycomb core Degree etc., shock resistance and low frequency vibration isolation performance are taken into account, and overcome the heavy inefficient disadvantage of traditional equipment pedestal, are negative poisson's ratio Honeycomb engineering application has opened up new field.Such as 500kg, working frequency works as honeycomb in the mechanical equipment of 18Hz The number of plies is 5 layers, when wall thickness 1mm, and the effectiveness in vibration suppression under working frequency copes with the dynamics amplification coefficient of impact up to 2.3dB Only 0.186, play the role of good vibration shock isolation and hits.
4, the effect of phonon crystal is enhancement device low frequency vibration damping performance, can be realized the vibration isolating effect of low-frequency range;Above and below Panel plays a supportive role, enhancement device bearing capacity, constraint honeycomb core deformation;The effect of negative poisson's ratio honeycomb core is to utilize it certainly Body auxetic effect and honeycomb energy absorption characteristics absorb impact energy, reduce the impact force for being transmitted to bottom plate.
5, phonon crystal negative poisson's ratio honeycomb vibration isolation anti-impact device provided by the invention.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention, Objects and advantages will become more apparent upon:
Fig. 1 is the structural schematic diagram of negative poisson's ratio honeycomb core provided by the invention
Fig. 2 is the front view of negative poisson's ratio honeycomb core provided by the invention
Fig. 3 is provided by the invention from honeycomb core unit cell to the change procedure figure of phonon crystal negative poisson's ratio honeycomb unit cell.
Fig. 4 is the structural schematic diagram of phonon crystal negative poisson's ratio honeycomb vibration isolation anti-impact device provided by the invention.
Fig. 5 is the front view of phonon crystal negative poisson's ratio honeycomb vibration isolation anti-impact device provided by the invention.
In figure:
1- vibration isolator top panel
2- vibration isolator lower panel
3- negative poisson's ratio honeycomb core
4- lead
5- rubber block
The cell element of 300- honeycomb core
301- first kind component units
302- the second class component units
304- honeycomb core unit cell
305- phonon crystal unit cell
The first hollow space of 601-
The second hollow space of 602-
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention Protection scope.
As shown in Figure 4, Figure 5, for according to a kind of phonon crystal negative poisson's ratio honeycomb vibration isolation shock resistance dress provided by the invention It sets, including vibration isolator top panel 1, vibration isolator lower panel 2, negative poisson's ratio honeycomb core 3, lead 4, rubber block 5;Vibration isolator top panel 1, vibration isolator lower panel 2, negative poisson's ratio honeycomb core 3 are sequentially connected;Lead 4 interconnected is arranged with rubber block 5 in negative Poisson In Cellular structure than honeycomb core 3.Negative poisson's ratio honeycomb core 3, lead 4, rubber block 5 constitute phonon crystal.Rubber block 5 and negative pool Connection of the pine than the cell element wall of the Cellular structure of honeycomb core 3 uses embedded mode;The extending direction of lead 4 is parallel to negative poisson's ratio The longitudinal direction of honeycomb core 3;Lead 4 is embedded in rubber block 5, and rubber block 5 matches the cell element for being embedded in negative poisson's ratio honeycomb core 3 In structure.
Specifically, as shown in figure 3, the photonic crystal structure that negative poisson's ratio honeycomb core 3, lead 4, rubber block 5 are constituted, In lead 4, rubber block 5 size can be designed in the preparation, so that the effectiveness in vibration suppression of arbitrary frequency point is realized, to make Of the invention must have the wider scope of application, the especially present invention that can effectively realize low-frequency range by the design of phonon crystal Damping property.Further, as shown in Figure 4, Figure 5, it is negative that 3 column are connected between vibration isolator top panel 1, vibration isolator lower panel 2 The first kind component units 301 of Poisson's ratio honeycomb core, wherein the cross section of first kind component units 301 trapezoidal shape in Fig. 5 Shape, each column contain 14 first kind component units 301.In the first kind component units 301 of the negative poisson's ratio honeycomb core of adjacent column Between be connected with the second class component units 302 of negative poisson's ratio honeycomb core.It is hollow structure inside first kind component units 301, Form the first hollow space 601.The inside configuration that first kind component units and the second class component units surround is hollow structure, shape At the second hollow space 602.First kind component units 301 are made with the second class component units 302 of same material.Such as figure Shown in 4, lead 4 is strip, and rubber block 5 is sheet.Lead 4 can be only partially embedded into rubber block 5.Lead 4 passes through rubber Block 5 is suspended on negative poisson's ratio honeycomb core 3.
Negative poisson's ratio honeycomb core 3 is welded to connect with vibration isolator top panel 1, vibration isolator lower panel 2 constitutes whole load respectively Equipment.Vibration isolator top panel 1 is mechanical equipment placed side;Floor can be bolted in vibration isolator lower panel 2.Negative poisson's ratio The Cellular structure Poisson's ratio of honeycomb core 2 is negative value, has auxetic effect.The phonon crystal negative poisson's ratio honeycomb vibration isolation shock resistance Vibration isolator top panel 1, vibration isolator lower panel 2 are connect with negative poisson's ratio honeycomb core 3 by device respectively using vacuum brazing mode;It is negative Poisson's ratio honeycomb core 2 is manufactured by the way of monoblock cast.
The present invention also provides a kind of preparation methods of phonon crystal negative poisson's ratio honeycomb vibration isolation anti-impact device, including By the size design to lead 4 and rubber block 5 in phonon crystal, multiple or arbitrary frequency point effectiveness in vibration suppression are realized.Especially It is the damping property that the present invention can effectively realize low-frequency range by the design of phonon crystal.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase Mutually combination.

Claims (4)

1. a kind of phonon crystal negative poisson's ratio honeycomb vibration isolation anti-impact device, which is characterized in that including vibration isolator top panel (1), Vibration isolator lower panel (2), negative poisson's ratio honeycomb core (3), lead (4), rubber block (5);
Vibration isolator top panel (1), vibration isolator lower panel (2), negative poisson's ratio honeycomb core (3) are sequentially connected;
Lead (4) interconnected and rubber block (5) are arranged in the Cellular structure of negative poisson's ratio honeycomb core (3);
Negative poisson's ratio honeycomb core (3), lead (4), rubber block (5) constitute phonon crystal;
The connection of the cell element wall of rubber block (5) and the Cellular structure of negative poisson's ratio honeycomb core (3) uses embedded mode;Lead (4) Extending direction be parallel to the longitudinal directions of negative poisson's ratio honeycomb core (3);
Lead (4) is embedded in rubber block (5), and rubber block (5) matches the Cellular structure for being embedded in negative poisson's ratio honeycomb core (3) In.
2. phonon crystal negative poisson's ratio honeycomb vibration isolation anti-impact device according to claim 1, which is characterized in that negative Poisson It is welded to connect respectively with vibration isolator top panel (1), vibration isolator lower panel (2) than honeycomb core (3) and constitutes whole load equipment;
Vibration isolator top panel (1) is mechanical equipment placed side;Floor can be bolted in vibration isolator lower panel (2);
The Cellular structure Poisson's ratio of negative poisson's ratio honeycomb core is negative value, has auxetic effect.
3. phonon crystal negative poisson's ratio honeycomb vibration isolation anti-impact device according to claim 1, which is characterized in that using true Vibration isolator top panel (1), vibration isolator lower panel (2) are connect with negative poisson's ratio honeycomb core (3) by empty brazing mode respectively.
4. phonon crystal negative poisson's ratio honeycomb vibration isolation anti-impact device according to claim 1, which is characterized in that negative Poisson It than honeycomb core is manufactured by the way of monoblock cast.
CN201710042535.9A 2017-01-20 2017-01-20 Phonon crystal negative poisson's ratio honeycomb vibration isolation anti-impact device Active CN106907418B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001092754A1 (en) * 2000-05-31 2001-12-06 Ismans - Institut Superieur Des Materiaux Du Mans Variable or non-variable amplitude vibrating wave damping device
CN102720785A (en) * 2012-05-29 2012-10-10 北京航空航天大学 Internally hollow metal rubber vibration isolator with negative Poisson's ratio characteristic
CN102717542A (en) * 2012-06-29 2012-10-10 大连理工大学 Bulletproof sandwich plate
EP2647797A2 (en) * 2012-04-04 2013-10-09 Rolls-Royce plc Vibration damping
CN103758904A (en) * 2014-01-27 2014-04-30 重庆交通大学西南水运工程科学研究所 Damping board based on negative poisson ratio structure
CN203730628U (en) * 2014-02-21 2014-07-23 广州汽车集团股份有限公司 Shock absorber assembly and bumper block structure for shock absorber assembly
CN104763772A (en) * 2015-03-31 2015-07-08 华南理工大学 Buffering and energy absorbing structure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001092754A1 (en) * 2000-05-31 2001-12-06 Ismans - Institut Superieur Des Materiaux Du Mans Variable or non-variable amplitude vibrating wave damping device
EP2647797A2 (en) * 2012-04-04 2013-10-09 Rolls-Royce plc Vibration damping
CN102720785A (en) * 2012-05-29 2012-10-10 北京航空航天大学 Internally hollow metal rubber vibration isolator with negative Poisson's ratio characteristic
CN102717542A (en) * 2012-06-29 2012-10-10 大连理工大学 Bulletproof sandwich plate
CN103758904A (en) * 2014-01-27 2014-04-30 重庆交通大学西南水运工程科学研究所 Damping board based on negative poisson ratio structure
CN203730628U (en) * 2014-02-21 2014-07-23 广州汽车集团股份有限公司 Shock absorber assembly and bumper block structure for shock absorber assembly
CN104763772A (en) * 2015-03-31 2015-07-08 华南理工大学 Buffering and energy absorbing structure

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