CN106696381A - Blocked-up damping vibration-attenuation soundproof floor - Google Patents
Blocked-up damping vibration-attenuation soundproof floor Download PDFInfo
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- CN106696381A CN106696381A CN201710033143.6A CN201710033143A CN106696381A CN 106696381 A CN106696381 A CN 106696381A CN 201710033143 A CN201710033143 A CN 201710033143A CN 106696381 A CN106696381 A CN 106696381A
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- 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
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- 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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/095—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyurethanes
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- 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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
-
- 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
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- 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
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D17/00—Construction details of vehicle bodies
- B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
- B61D17/10—Floors
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- 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
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/0278—Polyurethane
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/10—Properties of the layers or laminate having particular acoustical properties
- B32B2307/102—Insulating
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/212—Electromagnetic interference shielding
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/304—Insulating
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
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- 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
- B32B2419/00—Buildings or parts thereof
- B32B2419/04—Tiles for floors or walls
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Floor Finish (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a blocked-up damping vibration-attenuation soundproof floor which comprises a carriage base plate, a vicious elastic damping layer I, a blocked-up layer, a vicious elastic damping layer II and a restraint layer which are arranged in sequence. Due to introduction of the blocked-up layer, a conventional restraint damping structure is greatly changed, deformation of the damping layer is expanded, and thus the properties of the damping layer are improved. The carriage base plate, the vicious elastic damping layer I and the blocked-up layer form a restraint damping structure I; the blocked-up layer, the vicious elastic damping layer II and the restraint layer form a restraint damping structure II; the blocked-up layer consists of a plurality of densely arranged trapezoid blocks; and adjacent trapezoid blocks are adhered through vicious elastic damping layers III. As the restraint damping structures of the blocked-up damping vibration-attenuation soundproof floor are organically combined with a blocked-up damping structure, structural vibration can be effectively inhibited, and the vibration noise of a carriage can be reduced. As the structure of the blocked-up layer is changed into the trapezoid blocked-up blocks, the bending rigidity of the blocked-up layer can be greatly degraded, and the damping energy consumption of the structure can be remarkably reduced.
Description
Technical field
The invention belongs to building field, it is related to a kind of vibration damping floor, specifically, is related to a kind of subway carriage vibration damping ground
Plate.
Background technology
With the development of urban transportation, subway importance in daily life is more and more obvious.Although subway is people
Trip facility be made that indelible contribution, the noise produced by railcar operation also brings pole to resident and passenger
Big puzzlement.Noise source inside influence railcar mainly includes following several：Wheel-rail noise (Wheel/rail noise, wheel track
Impact noise, howling), reduction box noise, the electromagnetic noise of motor, air compressor machine noise, Noise in Air Conditioning System and pantograph
Electromagnetic noise etc..On the one hand, the noise of railcar noise source radiation enters car by diffraction, transmission etc. by air borne
It is interior；On the other hand, the body oscillating that wheel-rail force etc. causes also can cause internal car noise higher to in-car radiated noise.
In order to improve the sound insulation property of vehicle body floor structure, internal car noise level is reduced；Current railcar is used mostly
The mode of interior installed floor (such as aluminum honeycomb panel) is laid to improve sound insulation property.However, built-in floor panel structure not only high cost, and
Quality is big, is unfavorable for vehicle lightweight.Meanwhile, also make the design structure of railcar complicated to a certain extent, increased car
Safeguard difficulty.
The essence of noise is vibration, and reducing structural vibration could control compartment noise.Utility model patent ZL
201320564519.3 disclose on " a kind of rolling stock vibration damping floor "；The vibration damping floor realizes Rigid Fastener with flexible material
Expect the combination of (rubber), make to be fixedly connected indirectly between in-vehicle device and thorough skeleton, effectively prevent in-vehicle device extraction.So
And, rubber damping frequency domain is narrow and is influenceed greatly by temperature change, therefore can influence the effectiveness in vibration suppression on vibration damping floor to a certain extent.
Application for a patent for invention 201510827505.X is disclosed " a kind of novel high-speed train vibration and noise reducing floor panel structure "；This application is used
Damping frequency is wide in range and steel wire damper of continuously adjustabe is used as main vibration and noise reducing part；By sound insulating material, sound absorption material
The noise reduction sound absorber of the function admirable such as material and high-performance damping material is according to brand-new layout order and combination level and car body
Aluminium section bar is combined.The structure is not good from wood floor construction effectiveness in vibration suppression is overcome, and elastomeric material vibration damping frequency domain is narrow and receives
Temperature change influences big shortcoming.However, the structure is relative complex, the integral thickness and quality of floor compartment are considerably increased,
And it is cumbersome to mat formation, it is difficult to implement.
Normal champion et al. (《Visco-elastic damping material》, National Defense Industry Press, 2012, page 230) research show,
Bonded securely between damping layer and substrate one layer of shear stiffness greatly and the minimum material of bending rigidity as intermediate layer
(Spacer), can improve Structural parameter, and the quality of system can be reduced.They think, in the damping knot of given thickness
In structure, 2/3 damping action occurs in half outside layer material, therefore inner half layer can be replaced with the material of " zero gravity ".
The material of this inner half layer " zero gravity " is referred to as expanding change layer or pad level, and it can increase the resistance counted from the midline plane of bonding
Buddhist nun's treatment distance (equivalent to the thickness for increasing damping layer), so as to also just increase viscoelastic layer deformation, structural damping is also just therewith
Increase.Meanwhile, the addition for expanding change layer also has the effect for widening effective damping temperature width.And because expand change layer density of material very
It is small, it is possible to significantly reduce the apparent mass of damping material system.The pad level for using at present is cellular or fluffy
Rigid foam, its subsidiary effect is to absorb sound and heat-insulated.However, because existing padded damping structure is often using the resistance having cured
Damping material is bonded by bonding agent, easily produces the problem that Coating combination is insecure, expansion change layer intensity is too low；When padded damping knot
When structure is applied to the vibration damping of larger vibration component, this problem is particularly evident.Additionally, using common rigid foam not fire resisting,
There are problems that rail do not prevent fires, security.
At present, the research temperature based on CNT, many people have been directed to addition CNT in the foam and have carried out
Research.Wherein, mostly using the method for physics addition.And Kuan H C and Jung Y C et al. employ the side of chemical bonding
CNT is added in normal direction polyurethane foam.However, the purpose of its addition CNT is to improve the intensity and toughness of material,
And improve electric conductivity, electromagnetic wave shielding and the photoelectron emissions of material.Based on above-mentioned purpose, CNT is with the addition of at present
The application of polyurethane foam be only limitted to the following aspects：Field of electronic materials, intellectual material field, energy-saving material field and
Field of biomedical materials.
The content of the invention
For the problems of existing subway vibration damping floor, the padded damping vibration attenuation of carbon nano-tube modification of the present invention
Mute floor board employs carbon nano-tube modification groove foam, not only increased the shearing strength and damping of pad level, and
And the fire protecting performance of pad level is improved, improve the too low problem of pad level intensity caused by groove.
Technical scheme：Padded damping vibration attenuation mute floor board, including compartment substrate, the viscoelastic damping arranged successively
Layer I, pad level, viscoelastic damping layer II, restraint layer.The introducing of pad level changes traditional constraints damping structure significantly, expands
The deformation of damping layer, improves damping capacity.The compartment substrate, viscoelastic damping layer I and pad level form constrained damping structure
I；The pad level, viscoelastic damping layer II and restraint layer constitute constrained damping structure II.
The presence of pad level causes to increased padded damping structure in the vibration damping floor that (preferable pad level requirement bending resistance is firm
Degree is small, and shear stiffness is big), a kind of new constraint-padded compound damping structure is formd, substantially increase damping effect.With
Constrained damping structure is compared, and when the structural vibration produces deformation, expands the shearing deformation of upper strata viscoelastic damping layer, is improve
Damping capacity, as shown in Figure 2.The pad level is made up of the trapezoid blocks of multiple closely arrangements, the adjacent trapezoid block it
Between bonded using visco-elastic damping layer III.The trapezoid block is isosceles trapezoid block, and the height of the isosceles trapezoid block is pad
High-rise thickness, a length of 70-140mm in top, following a length of 100-170mm.Using the combining structure of trapezoid block, one side is significantly
The bending rigidity of pad level is reduced, makes it closer to idealized state；On the other hand, when structure produces bending because of vibration
When, not only there is shearing deformation in the damping layer of pad level upper and lower part, and the viscoelastic damping material between trapezoidal keel also can
Generation detrusion so that damping layer has obtained sufficient extension.The innovative design of trapezoid block pad level is changed originally significantly
The way of uniformly continuous or trough of belt energy pad level, can significantly improve the damping energy dissipation of structure.Wherein, the viscoelastic damping
Layer is dual-component polyurethane class high-damping, temperature range wide, wide band viscoelastic damping material, and the restraint layer 4 is light aluminum alloy
Material, density is 2.70-2.85g/cm3。
Wherein, in the constrained damping structure I depending on compartment substrate thickness foundation railway car design thickness, viscoelastic damping
The thickness of layer I and pad level is respectively 0.5-1.5mm and 12-24mm；Pad level, viscoelastic damping in the constrained damping structure II
The thickness of layer II and restraint layer is respectively 12-24mm, 0.5-1.5mm and 2-4mm.Wherein, the pad level is CNT
Modified polyurethane foam.The preparation of the carbon nano-tube modification polyurethane foam is comprised the following steps：(1) CNT is carried out
It is modified, obtain hydroxylated CNT；(2) the hydroxylated CNT that step (1) is obtained is added to padded for preparing
The B component of layer foam, i.e., in hydroxy compounds；(3) B component and component A isocyanates of hydroxyl carbon nano tube will be mixed with
Reacted under 60-80 DEG C of temperature conditionss and the pressure condition of 15-18MPa, you can obtain carbon nano-tube modification polyurethane foam.
Wherein, some grooves are evenly distributed with the carbon nano-tube modification polyurethane foam, between the adjacent hollow groove between
Every not less than 4-6mm；The aperture of the groove is 4-6mm.Carbon nano-tube modification groove pad level and existing rigid foam
Material pad level is bigger compared to shearing strength, the more conducively power consumption of damping layer, therefore can improve damping property.
The preparation of hydroxyl carbon nano tube is broadly divided into two steps：
1. CNT is modified using mixed acid process, by SWCN (SWCNT) the 40ml concentrated sulfuric acids and nitre
The 3 of acid:1 mixed solution is processed, and under conditions of 40 DEG C mixture then is used into ultrasonication 3 hours.Can be in carbon
Nanotube surface introduces carboxyl.
2. the carboxylated SWCN that 20 milligrams have the first step to obtain is distributed in anhydrous tetrahydro furan and carried out
Ultrasonication 30 minutes.2 milligrams of lithium aluminium hydride reductions are added afterwards and carry out ultrasonication 1 hour.The reaction mixing that will be obtained
Thing is slowly added into 200 ml methanols and is filtered with makrolon filter paper.Then by products therefrom in vacuum drying oven
With 80 DEG C of dryings 3 hours.Can obtain hydroxylated CNT.
The preparation method of padded damping vibration attenuation mute floor board, comprises the following steps：1) viscoelastic is sprayed in compartment substrate surface
Property damping material obtain viscoelastic damping layer I；(2) carbon nano-tube modification polyurethane foam is cut into trapezoid block, is bonded in viscoelastic
Damping layer I surfaces, are equally bonded together between adjacent trapezoidal block with visco-elastic damping layer III；(3) it is poly- in carbon nano-tube modification
Continue spraying damping material on urethane foam and obtain viscoelastic damping layer II；(4) it is certain thickness in viscoelastic damping layer II outer wrappings
Aluminium alloy is used as restraint layer, you can obtain padded damping vibration attenuation mute floor board.
Wherein, in the constrained damping structure I depending on compartment substrate thickness foundation railway car design thickness, the viscoelastic
Damping layer I, the thickness of viscoelastic damping layer II and visco-elastic damping layer III are 0.5-1.5mm, and the thickness of the pad level is
12-24mm, the thickness of the restraint layer is 2-4mm.Damping layer uses the construction method of direct spraying, and product integraty is good, work
Skill is simple, with low cost, engineer applied convenient.
Under verifying that there is padded damping vibration attenuation mute floor board of the present invention excellent damping property, the present invention to use
State method carries out vibration-testing to padded damping vibration attenuation mute floor board of the present invention and blank steel plate.Take 500mm × 43mm
× 3.5mm steel plates make padded damping vibration attenuation mute floor board, the padded damping vibration attenuation as base material (equivalent to compartment substrate)
The structural parameters detailed in Example 1-6 of mute floor board.Wherein, it is 200kg/m to use density3Polyurethane foam as padded
Layer；The polyurethanes viscoelastic damping material that functional Material Institute of Qingdao Technological University provides is used as damping layer.By 500mm ×
43mm × 3.5mm steel plates are contrasted as blank style.
DASP intelligent data acquisitions and Signal Analysis System V10 using Beijing Orient vibration and noise technique research institute enter
Row Data acquisition and issuance.Test method uses impulse excitation method, simulation style to vibrate free damped process after being subject to exciting.
To reduce external support to vibrating free damped influence, style level is sling with thin fishing line, suspension centre is in the steel plate left and right sides
At 50mm；Pick-up point and impacting point respectively at the left and right sides 25mm of steel plate surface, as shown in Figure 4；Sample frequency is 2048Hz,
Excitation head is steel toe, and exciting force is 45N.
Beneficial effects of the present invention：
1st, vibration and noise reducing floor of the present invention constrained damping structure is organically combined with padded damping structure,
The damping capacity of single damping structure is substantially increased, a kind of new constraint-padded damping structure is formd, can effectively be suppressed
Structural vibration, reduces the vibration noise in compartment.
2nd, the present invention not only introduces pad level, and traditional constraints damping structure is changed significantly, expands the shape of damping layer
Become, improve damping capacity；And innovation transformation is further carried out to padded Damping Theory, one is set up between substrate and pad level
Layer damping layer (original padded Damping Theory only has one layer of damping layer), while as binding agent；Further increase damping effect
Really.
3rd, the present invention is redesigned to the structure of pad level, is changed to trapezoidal keel.In the situation of proof strength
Under, the combination of trapezoid block greatly reduces the bending rigidity of pad level, makes it closer to the idealization (bending resistance of padded Damping Theory
Rigidity is substantially reduced)；And when structure produces bending because of vibration, not only the damping layer in pad level upper and lower part occurs
Shearing deformation, the viscoelastic damping material between trapezoidal keel can also occur shearing deformation, fully extend the region of damping layer.
The innovative design enables to structure when there is same flexural deformation, can significantly improve the damping energy dissipation for improving structure.
4th, visco-elastic damping material of the present invention is using high-damping, temperature range wide, the resistance of wide band polyurethanes viscoelastic
Damping material, overcomes the big shortcoming of the damping capacity shrinkage temperature of elastomeric material, frequency influence.
5th, the present invention adds CNT in pad level and digs out groove in foam side, reduces as much as possible
The oeverall quality of structure；In the effect with sound absorption, insulation while pad level is acted on of playing, further vibration noise spoke is reduced
Penetrate, maintain temperature in compartment constant.
6th, compared with prior art, the present invention not only makes pad using carbon nano-tube modification groove foam as pad level
It is high-rise to collectively constitute padded damping structure with original damping structure, and the shearing strength of pad level can be increased (from damping angle
Degree consideration require that pad level shearing strength is as large as possible), improve pad level fire protecting performance, increase pad level itself damping
Effect and make up due to the too low problem of the pad level intensity caused by more groove.
7th, vibration and noise reducing floor panel structure of the present invention is relatively easy, it is easy to implement, and possesses wide application prospect.
Brief description of the drawings
Fig. 1 is the schematic diagram before and after damping silent floor panel structure deformation of the present invention；
Fig. 2 is conventional constrained damping structure and the constraint of padded damping vibration attenuation mute floor board of the present invention-padded
Damping structure shearing deformation comparison diagram；
Fig. 3 is the structural representation of impulse excitation method test device of the present invention；
Fig. 4 is the constraint-padded damping steel plate and blank steel plate of padded damping vibration attenuation mute floor board of the present invention
Third-octave vibration acceleration level value curve comparison figure；
Fig. 5 is the third-octave vibration acceleration level value curve comparison figure of blank steel plate and embodiment 1-6 test models；
Wherein, 1 is compartment substrate, and 2 is viscoelastic damping layer I, and 3 is pad level, and 4 is viscoelastic damping layer II, and 5 is restraint layer, 6
It is viscoelastic damping layer III.
Specific embodiment
With reference to embodiment, the present invention is described further.
Embodiment 1：
Padded damping vibration attenuation mute floor board, including compartment substrate, viscoelastic damping layer I, pad level, the viscoelastic resistance arranged successively
Buddhist nun's layer II, restraint layer.The compartment substrate, viscoelastic damping layer I and pad level form constrained damping structure I；It is the pad level, viscous
Play damping layer II and restraint layer constitutes constrained damping structure II.The viscoelastic damping layer I, viscoelastic damping layer II and viscoplasticity resistance
The thickness of Buddhist nun's layer III is 1mm, and the thickness of the pad level is 24mm, and the thickness of the restraint layer is 2mm.The pad level
It is made up of the trapezoid block of multiple closely arrangements, is bonded using visco-elastic damping layer III between the adjacent trapezoid block.Institute
Trapezoid block is stated for isosceles trapezoid block, the height of the isosceles trapezoid block is the thickness of pad level, a length of 110mm in top, the lower length of side
It is 170mm.Wherein, the visco-elastic damping layer is dual-component polyurethane class high-damping, temperature range wide, wide band viscoelastic damping material
Material, the restraint layer 4 is light aluminum alloy material, and density is 2.70-2.85g/cm3。
Wherein, the pad level is carbon nano-tube modification polyurethane foam.The carbon nano-tube modification polyurethane foam
Preparation is comprised the following steps：
(1) CNT is modified, obtains hydroxylated CNT；Detailed step is：(1a) uses mixed acid process
CNT is modified, SWCN (SWCNT) is used the 3 of the 40ml concentrated sulfuric acids and nitric acid:At 1 mixed solution
Reason, then uses ultrasonication 3 hours by mixture under conditions of 40 DEG C.Carboxyl can be introduced in carbon nano tube surface.
Be distributed to the carboxylated SWCN that 20 milligrams have the first step to obtain in anhydrous tetrahydro furan and ultrasonic wave is carried out by (1b)
Treatment 30 minutes.2 milligrams of lithium aluminium hydride reductions are added afterwards and carry out ultrasonication 1 hour.The reactant mixture that will be obtained is slow
It is added in 200 ml methanols and is filtered with makrolon filter paper.Then by products therefrom in vacuum drying oven with 80 DEG C
Dry 3 hours.Can obtain hydroxylated CNT.
(2) the hydroxylated CNT that step (1) is obtained is added to the B component for preparing pad level foam, i.e. hydroxyl
In based compound；
(3) will be mixed with the B component of hydroxyl carbon nano tube and component A isocyanates 70 DEG C temperature conditionss and
Reacted under the pressure condition of 18MPa, you can obtain carbon nano-tube modification polyurethane foam.Wherein, the carbon nano-tube modification gathers
Some grooves are evenly distributed with urethane foam, the interval between the adjacent hollow groove is not less than 4mm；The groove
Aperture is 4mm.Carbon nano-tube modification groove pad level shearing strength compared with existing stiff foam material pad level is bigger, more
Beneficial to the power consumption of damping layer, therefore damping property can be improved.
The preparation method of padded damping vibration attenuation mute floor board, comprises the following steps：1) viscoelastic is sprayed in compartment substrate surface
Property damping material obtain viscoelastic damping layer I；(2) carbon nano-tube modification polyurethane foam is cut into trapezoid block, is bonded in viscoelastic
Damping layer I surfaces, are equally bonded together as pad level between adjacent trapezoidal block with visco-elastic damping layer III；(3) exist
Continue spraying damping material on carbon nano-tube modification polyurethane foam and obtain viscoelastic damping layer II；(4) outside viscoelastic damping layer II
Parcel aluminium alloy is used as restraint layer, you can obtain padded damping vibration attenuation mute floor board.
To verify that padded damping vibration attenuation mute floor board of the present invention has excellent damping property, using following methods
Vibration-testing is carried out with blank steel plate to padded damping vibration attenuation mute floor board prepared by the above method.
Method of testing：Padded damping vibration attenuation as floor base material is prepared using 500mm × 43mm × 3.5mm steel plates Jing Yin
Board-like sample, while using the steel plate as blank steel plate.Using Beijing Orient vibration and the DASP intelligence numbers of noise technique research institute
Data acquisition and issuance is carried out according to collection and Signal Analysis System V10.Test method uses impulse excitation method, simulation style to be subject to
Free damped process is vibrated after exciting.It is to reduce external support to vibrating free damped influence, with thin fishing line by style water
Flat to sling, suspension centre is at the 50mm of the steel plate left and right sides；Pick-up point and impacting point respectively at the left and right sides 25mm of steel plate surface, such as
Shown in Fig. 4；Sample frequency is 2048Hz, and excitation head is steel toe, and exciting force is 45N.
Embodiment 2：
As different from Example 1, padded damping vibration attenuation mute floor board, viscoelastic damping layer I, viscoelastic damping layer II and
The thickness of visco-elastic damping layer III is 1.5mm, and the thickness of the pad level is 12mm, and the thickness of the restraint layer is 3mm.
The trapezoid block is isosceles trapezoid block, and the height of the isosceles trapezoid block is the thickness of pad level, a length of 140mm in top, below
A length of 170mm.The restraint layer 4 is light aluminum alloy material, and density is 2.70-2.85g/cm3。
The preparation of the carbon nano-tube modification polyurethane foam, in the step (3), will be mixed with hydroxyl carbon nano tube
B component and component A isocyanates react under 80 DEG C of temperature conditionss and the pressure condition of 15MPa, you can obtain carbon nanometer
Pipe modified polyurethane foam.Interval between the adjacent hollow groove is not less than 5mm；The aperture of the groove is 5mm.
Embodiment 3：
As different from Example 1, padded damping vibration attenuation mute floor board, viscoelastic damping layer I, viscoelastic damping layer II and
The thickness of visco-elastic damping layer III is 0.5mm, and the thickness of the pad level is 18mm, and the thickness of the restraint layer is 4mm.
The trapezoid block is isosceles trapezoid block, and the height of the isosceles trapezoid block is the thickness of pad level, a length of 70mm in top, the lower length of side
It is 100mm.The restraint layer 4 is light aluminum alloy material, and density is 2.70-2.85g/cm3。
The preparation of the carbon nano-tube modification polyurethane foam, step (3) will be mixed with the B component of hydroxyl carbon nano tube
Reacted under 60 DEG C of temperature conditionss and the pressure condition of 16MPa with component A isocyanates, you can obtain carbon nano-tube modification and gather
Urethane foam.Interval between the adjacent hollow groove is not less than 6mm；The aperture of the groove is 6mm.
Embodiment 4：
As different from Example 1, padded damping vibration attenuation mute floor board, the viscoelastic damping layer I and viscoelastic damping layer II
Thickness be 1mm, the thickness of the visco-elastic damping layer III is 0.5mm, and the thickness of the pad level is 15mm, the constraint
The thickness of layer is 3mm.The trapezoid block is isosceles trapezoid block, and the height of the isosceles trapezoid block is the thickness of pad level, top
A length of 70mm, following a length of 140mm.The restraint layer 4 is light aluminum alloy material, and density is 2.70-2.85g/cm3。
The preparation of the carbon nano-tube modification polyurethane foam, step (3) will be mixed with the B component of hydroxyl carbon nano tube
Reacted under 65 DEG C of temperature conditionss and the pressure condition of 17.5MPa with component A isocyanates, you can obtain carbon nano-tube modification
Polyurethane foam.Interval between the adjacent hollow groove is not less than 4.5mm；The aperture of the groove is 5.5mm.
Embodiment 5：
As different from Example 1, padded damping vibration attenuation mute floor board, the thickness of the viscoelastic damping layer I is 1.5mm,
The thickness of the viscoelastic damping layer II and visco-elastic damping layer III is 1.0mm, and the thickness of the pad level is 20mm, described
The thickness of restraint layer is 2mm.The trapezoid block is isosceles trapezoid block, and the height of the isosceles trapezoid block is the thickness of pad level,
The a length of 90mm in top, following a length of 150mm.The restraint layer 4 is light aluminum alloy material, and density is 2.70-2.85g/cm3。
The preparation of the carbon nano-tube modification polyurethane foam, step (3) will be mixed with the B component of hydroxyl carbon nano tube
Reacted under 75 DEG C of temperature conditionss and the pressure condition of 16.5MPa with component A isocyanates, you can obtain carbon nano-tube modification
Polyurethane foam.Interval between the adjacent hollow groove is not less than 5.5mm；The aperture of the groove is 4.5mm.
Embodiment 6：
As different from Example 1, padded damping vibration attenuation mute floor board, the thickness of the viscoelastic damping layer I is 0.5mm,
The thickness of the viscoelastic damping layer II is 1.5mm, and the thickness of the visco-elastic damping layer III is 0.5mm, the pad level
Thickness is 18mm, and the thickness of the restraint layer is 3mm.The trapezoid block is isosceles trapezoid block, the height of the isosceles trapezoid block
It is the thickness of pad level, a length of 105mm in top, following a length of 135mm.The restraint layer 4 is light aluminum alloy material, and density is
2.70-2.85g/cm3。
The preparation of the carbon nano-tube modification polyurethane foam, step (3) will be mixed with the B component of hydroxyl carbon nano tube
Reacted under 70 DEG C of temperature conditionss and the pressure condition of 17MPa with component A isocyanates, you can obtain carbon nano-tube modification and gather
Urethane foam.Interval between the adjacent hollow groove is not less than 5mm；The aperture of the groove is 5mm.
The blank steel plate of table 1 and embodiment 1-6 experiment result lists
| Single order fissipation factor | Second order fissipation factor | The total level value of vibration acceleration | |
| Blank steel plate | 0.019 | 0.007 | 151.58dB |
| Embodiment 1 | 0.158 | 0.177 | 135.50dB |
| Embodiment 2 | 0.204 | 0.210 | 134.12dB |
| Embodiment 3 | 0.159 | 0.170 | 135.09dB |
| Embodiment 4 | 0.190 | 0.210 | 134.69dB |
| Embodiment 5 | 0.154 | 0.153 | 135.39dB |
| Embodiment 6 | 0.189 | 0.190 | 134.54dB |
Fig. 5 is blank steel plate and vibration acceleration level value curve of the constraint-padded damping steel plate style under third-octave
Figure (linear weighted).As shown in Figure 5, with the change of frequency, the level value curve of constraint-padded damping steel plate has been at blank
The lower section of steel plate.In 50~500Hz, the curve multiple peak value of blank steel plate；The curve of embodiment 1-6 test laths is relatively flat
It is slow, without the obvious vibration peak of appearance.Illustrate in the case where identical exciting force is acted on, the vibratory response of blank steel plate is violent, and constrain-
Padded damping steel plate response is smaller, and constraint-padded damping steel plate is compared and serves obvious damping effect with blank steel plate.
The preceding two ranks modal loss factor and the total level value of vibration of blank steel plate and constraint-padded damping steel plate are as shown in table 2.
The ability of fissipation factor representative structure loss of energy, fissipation factor is bigger, and energy dissipation capacity is stronger.Vibration acceleration level value characterizes knot
Structure overall vibration level, numerical value is bigger, shows that vibration is stronger.As shown in Table 2, the constraint-padded damping steel plate and blank steel
Plate is compared, and the fissipation factor of preceding two ranks mode is significantly improved, and its energy dissipation capacity is obviously improved；Simultaneously total level value is vibrated substantially to drop
Low, decreasing value reaches 16.08-17.46dB.
Vibration-testing is carried out by blank steel plate and embodiment 1-3 styles, and to the vibration acceleration of its third-octave
Level value, vibrate total level value and the fissipation factor of preceding two ranks mode is analyzed checking, draw：Floor of the present invention has
Obvious effectiveness in vibration suppression, can be that the effectiveness in vibration suppression on the subway carriage vibration damping floor is played a great role.
Claims (10)
1. padded damping vibration attenuation mute floor board, it is characterised in that：Including the compartment substrate, the viscoelastic damping layer I, padded that arrange successively
Layer, viscoelastic damping layer II, restraint layer；The compartment substrate, viscoelastic damping layer I and pad level form constrained damping structure I；It is described
Pad level, viscoelastic damping layer II and restraint layer constitute constrained damping structure II；The pad level is by multiple ladders closely arranged
Shape block is constituted, and is bonded using visco-elastic damping layer III between the adjacent trapezoid block.
2. padded damping vibration attenuation mute floor board according to claim 1, it is characterised in that：The viscoelastic damping layer I, viscoelastic
The thickness of damping layer II and visco-elastic damping layer III is 0.5-1.5mm, and the thickness of the pad level is 12-24mm, it is described about
The thickness of beam layer is 2-4mm.
3. padded damping vibration attenuation mute floor board according to claim 1 and 2, it is characterised in that：The pad level is received for carbon
Mitron modified polyurethane foam；The preparation of the carbon nano-tube modification polyurethane foam is comprised the following steps：(1) to CNT
It is modified, obtains hydroxylated CNT；(2) the hydroxylated CNT that step (1) is obtained is added to for preparing
In the B component of pad level foam, i.e. hydroxy compounds；(3) B component and component A isocyanide of hydroxyl carbon nano tube will be mixed with
Acid esters reacts, you can obtain carbon nano-tube modification polyurethane foam.
4. padded damping vibration attenuation silencing steel rail according to claim 3, it is characterised in that：The poly- ammonia of carbon nano-tube modification
Some grooves are evenly distributed with ester foam, the aperture of the groove is 4-6mm, the interval between the adjacent hollow groove
Not less than 4-6mm；The trapezoid block is isosceles trapezoid block, and the height of the isosceles trapezoid block is the thickness of pad level, the upper length of side
It is 70-140mm, following a length of 100-170mm.
5. padded damping vibration attenuation mute floor board according to claim 3, it is characterised in that：The visco-elastic damping layer is double
Component polyurethane class viscoelastic damping material, it is 2.70-2.85g/cm that the restraint layer 4 uses density3Aluminum alloy materials.
6. padded damping vibration attenuation silencing steel rail according to claim 3, it is characterised in that：Reaction in the step (3)
60-80 DEG C of temperature, reaction pressure 15-18MPa.
7. the preparation method of padded damping vibration attenuation mute floor board, it is characterised in that：Comprise the following steps：(1) in compartment substrate table
Face spraying visco-elastic damping material obtains viscoelastic damping layer I；(2) carbon nano-tube modification polyurethane foam is cut into trapezoid block thickness
Degree, is bonded in viscoelastic damping layer I surfaces, is equally bonded together with visco-elastic damping layer III between adjacent trapezoidal block；(3) exist
Continue spraying damping material on carbon nano-tube modification polyurethane foam and obtain viscoelastic damping layer II；(4) outside viscoelastic damping layer II
Certain thickness aluminium alloy is wrapped up as restraint layer, you can obtain padded damping vibration attenuation mute floor board.
8. the preparation method of padded damping vibration attenuation mute floor board according to claim 7, it is characterised in that：The viscoelastic resistance
Buddhist nun's layer I, the thickness of viscoelastic damping layer II and visco-elastic damping layer III are 0.5-1.5mm, and the thickness of the pad level is 12-
24mm, the thickness of the restraint layer is 2-4mm..
9. the preparation method of padded damping vibration attenuation mute floor board according to claim 7, it is characterised in that：The carbon nanometer
Some grooves are evenly distributed with pipe modified polyurethane foam, the aperture of the groove is 4-6mm, the adjacent hollow groove
Between interval be not less than 4-6mm；The trapezoid block is isosceles trapezoid block, and the height of the isosceles trapezoid block is the thickness of pad level
Degree, a length of 70-140mm in top, following a length of 100-170mm.
10. the preparation method of padded damping vibration attenuation silencing steel rail according to claim 7, it is characterised in that：The viscoelastic
Property damping layer be dual-component polyurethane class viscoelastic damping material, it is 2.70-2.85g/cm that the restraint layer 4 uses density3Aluminium
Alloy material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710033143.6A CN106696381B (en) | 2017-01-18 | 2017-01-18 | Padded damping vibration attenuation mute floor board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710033143.6A CN106696381B (en) | 2017-01-18 | 2017-01-18 | Padded damping vibration attenuation mute floor board |
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| CN106696381B CN106696381B (en) | 2018-05-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108762045A (en) * | 2018-07-30 | 2018-11-06 | 江苏同盟汽车零部件实业有限公司 | Experiment damping sheet when a kind of vibrometer |
| CN113928356A (en) * | 2021-11-25 | 2022-01-14 | 中车南京浦镇车辆有限公司 | High sound insulation laminate flooring of lightweight for railcar |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08323907A (en) * | 1995-03-30 | 1996-12-10 | Sekisui Chem Co Ltd | Damping and soundprroof material |
| CN205712549U (en) * | 2016-04-22 | 2016-11-23 | 张瑞泉 | A kind of building board |
-
2017
- 2017-01-18 CN CN201710033143.6A patent/CN106696381B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08323907A (en) * | 1995-03-30 | 1996-12-10 | Sekisui Chem Co Ltd | Damping and soundprroof material |
| CN205712549U (en) * | 2016-04-22 | 2016-11-23 | 张瑞泉 | A kind of building board |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108762045A (en) * | 2018-07-30 | 2018-11-06 | 江苏同盟汽车零部件实业有限公司 | Experiment damping sheet when a kind of vibrometer |
| CN113928356A (en) * | 2021-11-25 | 2022-01-14 | 中车南京浦镇车辆有限公司 | High sound insulation laminate flooring of lightweight for railcar |
| CN113928356B (en) * | 2021-11-25 | 2024-05-28 | 中车南京浦镇车辆有限公司 | Lightweight high sound insulation composite floor for metro vehicle |
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| CN106696381B (en) | 2018-05-18 |
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