CN106758570B - Padded damping vibration attenuation silencing steel rail of carbon nano-tube modification and preparation method thereof - Google Patents
Padded damping vibration attenuation silencing steel rail of carbon nano-tube modification and preparation method thereof Download PDFInfo
- Publication number
- CN106758570B CN106758570B CN201710033145.5A CN201710033145A CN106758570B CN 106758570 B CN106758570 B CN 106758570B CN 201710033145 A CN201710033145 A CN 201710033145A CN 106758570 B CN106758570 B CN 106758570B
- Authority
- CN
- China
- Prior art keywords
- damping
- layer
- padded
- vibration attenuation
- pad level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
- E01B19/003—Means for reducing the development or propagation of noise
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/02—Ingredients treated with inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Laminated Bodies (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Padded damping vibration attenuation silencing steel rail of carbon nano-tube modification and preparation method thereof, the rail includes rail base, damping unit and damping layer I, the damping unit includes damping layer A and pad level, the pad level is located at close to the one side of damping layer I, and the damping layer A is located at close to the one side of rail base.The thickness ratio of the pad level and damping layer A are 4 16；The thickness ratio of the pad level and damping layer I are 4 16.The pad level is carbon nano-tube modification polyurethane foam.Several grooves are evenly distributed in the carbon nano-tube modification polyurethane foam.The present invention is using carbon nano-tube modification groove foam as pad level, pad level and original damping structure is not only made to collectively constitute padded damping structure, and the damping of the shearing strength (considering the problems of to require the pad level shearing strength as large as possible from vibration damping angle) that pad level can be increased, the fire protecting performance for improving pad level, increase pad level itself and the pad level intensity that makes up caused by more groove it is too low.
Description
Technical field
The invention belongs to building fields, are related to a kind of damping silent rail, specifically, are related to a kind of carbon nano-tube modification
Padded damping vibration attenuation silencing steel rail.
Background technology
In today's society, various vibrations and noise emerge in an endless stream, and keeping away can not keep away.However, this environment is long-term
Effect not only influences the physical and mental health of people, also results in structural device fatigue rupture, precision instrument sensitivity due to Long-term Vibration
Decline.Therefore, control vibration, reduction noise have become problem in the urgent need to address.
In recent years, the widely using in engineering vibration damping field with damping material, damping steel rail also begin to obtain extensive
Concern.Existing damping steel rail principal mode includes following three kinds：(1) one layer of damping layer is pasted in rail side, composition is freely
Damping structure；(2) wrap up one layer of restraint layer again outside damping layer, form constrained damping structure；(3) added in damping layer special-shaped
Labyrinth structure forms labyrinth type damping-constraining；(4) one layer of magnetic material layer/magnetic absorption layer is added in constrained damping structure,
And use one layer or multilayer damping layer.Wherein, free damping structure relies primarily on the tension and compression deformation of damping layer and carrys out Dissipated energy
Amount.And the detrusion that constrained damping structure relies primarily on damping layer carrys out dissipation energy, while damping layer can also generate tension and compression change
Shape, so as to more energy that dissipate.Labyrinth type damping-constraining, energy consumption principle are roughly the same with constrained damping structure；Add in labyrinth
The purpose of structure is to increase detrusion.For adding the damping structure of magnetic material layer in constrained damping structure,
Energy Dissipation Mechanism is identical with constrained damping structure；Increased magnetic material layer is to carry out absorbing in itself by magnetic material
And increase structural integrity.However, above four kinds of structures all have that inner half layer damping is little to energy consumption contribution, reduces
The efficiency of damping layer vibration attenuation energy consumption, causes the waste of damping material, improves cost.In addition, labyrinth constrained damping structure makes
Technique is excessively complicated, is unfavorable for product promotion.And add the constrained damping structure of magnetic material layer, substantially with original constraint
Damping structure is identical, and the magnetic material layer newly added in is difficult not only to provide oscillation damping and energy dissipating effect more better than damping material, also not
Sound-absorbing effect can be increased, and architecture quality can be increased.For using the damping layer of spraying process, since layer is not present in itself
Between combine power problem, also there is no need to magnetic materials to increase globality.
Normal champion et al. (《Visco-elastic damping material》, National Defense Industry Press, 2012, page 230) research show
One layer of shear stiffness is bonded between damping layer and substrate securely greatly and the minimum material of bending stiffness as interlayer
(Spacer), Structural parameter can be improved, and the quality of system can be reduced.They think, in the damping knot of given thickness
In structure, 2/3 damping action is happened in half external layer material, therefore inner half layer can use the material of " zero gravity " to substitute.
The material of this inner half layer " zero gravity " is known as expanding change layer or pad level, it can increase the resistance counted from the midline plane of bonding
Buddhist nun handles distance (being equivalent to the thickness for increasing damping layer), so as to also just increase the tension and compression deformation of viscoelastic layer, structural damping
Just increase therewith.Meanwhile the addition for expanding change layer also has the effect for widening effective damping temperature width.And become layer material because expanding
Density very little, it is possible to significantly reduce the apparent mass of damping material system.The pad level used at present be it is cellular or
Fluffy rigid foam, subsidiary effect are sound absorptions and heat-insulated.However, due to existing padded damping structure, often use has been consolidated
The damping material of change is bonded by bonding agent, easily leads to the problem of Coating combination it is insecure, expansion change layer intensity it is too low；When padded
When damping structure is applied to the vibration damping of larger vibration component, this problem is particularly evident.In addition, using common rigid foam intolerant to
Fire is not prevented fires, the problems such as security cannot be guaranteed there is also rail.
At present, the research temperature based on carbon nanotubes, many people have been directed to addition carbon nanotubes 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
Carbon nanotubes is added in normal direction polyurethane foam.However, it is to improve the intensity and toughness of material that it, which adds the purpose of carbon nanotubes,
And improve electric conductivity, electromagnetic wave shielding and the photoelectron emissions of material.Based on above-mentioned purpose, carbon nanotubes 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 padded damping vibration attenuation silencing steel rail, carbon nano-tube modification of the present invention is padded
Damping vibration attenuation silencing steel rail employs carbon nano-tube modification groove foam, not only adds shearing strength and the damping of pad level
Effect, and the fire protecting performance of pad level is improved, improve the problem of pad level intensity caused by groove is too low.
Technical scheme：Padded damping vibration attenuation silencing steel rail, including rail base, damping unit and damping layer I,
The damping unit includes damping layer A and pad level, and the pad level is located at close to the one side of damping layer I, described damping layer A
In close to the one side of rail base.The thickness ratio of the pad level and damping layer A are 4-16；The pad level is with damping layer I's
Thickness ratio is 4-16.The pad level is carbon nano-tube modification polyurethane foam.
The preparation of the carbon nano-tube modification polyurethane foam comprises the following steps：(1) carbon nanotubes is modified, obtained
To hydroxylated carbon nanotubes；(2) the hydroxylated carbon nanotubes that step (1) obtains, which is added to, is used to prepare pad level foam
In B components, i.e. hydroxy compounds；(3) B component of hydroxyl carbon nano tube will be mixed with component A isocyanates in 60-80
DEG C temperature conditionss and 15-18MPa pressure condition under react, you can obtain carbon nano-tube modification polyurethane foam.Wherein, institute
It states and several grooves is evenly distributed in carbon nano-tube modification polyurethane foam, the interval between the adjacent hollow slot is not less than
4-6mm；The aperture of the groove is 4-6mm.Carbon nano-tube modification groove pad level and existing stiff foam material are padded
Layer is more conducive to the energy consumption of damping layer, therefore can improve damping property compared to shearing strength bigger.
Wherein, the one sides of the damping layer I away from damping unit is additionally provided with restraint layer, and the restraint layer is steel plate；It is described
The quantity of damping unit is 1-3.
Wherein, the diamond dust for being embedded in the two surface is equipped between the pad level of each damping unit and damping layer A
Layer, the quantity of the diamond dust is 0.5-1.5kg/m2, the grain size of the diamond dust is 1.6-2.0mm.
The preparation of hydroxyl carbon nano tube is broadly divided into two steps：
1. carbon nanotubes is modified using mixed acid process, by single-walled carbon nanotube (SWCNT) the 40ml concentrated sulfuric acids and nitre
The 3 of acid:1 mixed solution is handled, then by mixture when using ultrasonication 3 small under conditions of 40 DEG C.It can be in carbon
Nanotube surface introduces carboxyl.
2. the carboxylated single-walled carbon nanotube that 20 milligrams have the first step to obtain is distributed in anhydrous tetrahydro furan and carried out
Ultrasonication 30 minutes.Afterwards add in 2 milligrams of lithium aluminium hydride reductions and carry out ultrasonication 1 it is small when.Obtained reaction is mixed
Object 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 it is dry 3 it is small when.It can obtain hydroxylated carbon nanotubes.
The freely preparation method of padded damping vibration attenuation silencing steel rail, comprises the following steps：(1) sprayed in the side of rail base
It applies damping material and obtains damping layer A, then carry out blasting treatment；(2) carbon as pad level is poured after handling on damping layer A
Nanotube modified polyurethane foam；(3) continue spraying damping material on carbon nano-tube modification polyurethane foam and obtain damping layer
I；It can obtain the padded damping vibration attenuation silencing steel rail of freedom in padded damping vibration attenuation silencing steel rail.The thickness of the damping layer A
For 3-5mm, the thickness of the pad level is 18-22mm, and the thickness of the damping layer I is 3-5mm.Damping layer is using direct
The construction method of spraying, product integraty is good, simple for process, of low cost, engineer application is convenient.
The preparation method of padded damping vibration attenuation silencing steel rail is constrained, is comprised the following steps：(1) sprayed in the side of rail base
It applies damping material and obtains damping layer A, then carry out blasting treatment；(2) carbon as pad level is poured after handling on damping layer A
Nanotube modified polyurethane foam；(3) continue spraying damping material on carbon nano-tube modification polyurethane foam and obtain damping layer
I；(4) in the steel plate that damping layer I outer wrappings thickness is 1-3mm as restraint layer, you can obtain padded damping vibration attenuation silencing steel rail
In the padded damping vibration attenuation silencing steel rail of constraint.It can obtain the padded damping vibration attenuation of freedom in padded damping vibration attenuation silencing steel rail
Silencing steel rail.The thickness of the damping layer A is 1-3mm, and the thickness of the pad level is 14-16mm, the thickness of the damping layer I
It is 1-3mm.
Multilayer constrains the preparation method of padded damping vibration attenuation silencing steel rail, comprises the following steps：(1) in the side of rail base
Face spraying damping material obtains damping layer A, then carries out blasting treatment；(2) poured after handling on damping layer A as pad level
Carbon nano-tube modification polyurethane foam；(2a) continues on the carbon nano-tube modification polyurethane foam of outermost damping unit
Spray damping material, blasting treatment；Pour the carbon nano-tube modification polyurethane foam as pad level；Repeat step
(2a), until the quantity of damping unit reaches requirement；(3) continue to spray damping material on carbon nano-tube modification polyurethane foam
Obtain damping layer I；(4) in the steel plate that damping layer I outer wrappings thickness is 1-3mm as restraint layer, you can obtain pad high-damping
The multilayer shaken in silencing steel rail constrains padded damping vibration attenuation silencing steel rail.The thickness of the damping layer A is 1-3mm, described padded
The thickness of layer is 14-16mm, and the thickness of the damping layer I is 1-3mm.
The blasting treatment concretely comprises the following steps：Spraying opportunity is 8-10 seconds after spraying damping material；Sandblasting air pressure is
0.6-0.8 megapascal, sandblasting distance are 1 meter, and temperature is 15-25 degrees Celsius.When carrying out blasting treatment using more than parameter, gravel
In each embedded half of adjacent two layers, the effect of vibration and noise reducing is best.
To verify that padded damping vibration attenuation silencing steel rail of the present invention has excellent damping property, under present invention use
It states method and vibration-testing is carried out to padded damping vibration attenuation silencing steel rail of the present invention and blank steel plate.Take 500mm × 43mm
× 3.5mm steel plates make padded damping vibration attenuation mute floor board as base material (being equivalent to rail), and the padded damping vibration attenuation is mute
The structural parameters detailed in Example 1-9 on floor.Wherein, density is used as 200kg/m3Polyurethane foam as pad level；
The polyurethanes viscoelastic damping material that functional Material Institute of Qingdao Technological University provides is as damping layer.By 500mm × 43mm
× 3.5mm steel plates are compared as blank style.
Using Beijing Orient vibration and noise technique research institute DASP intelligent data acquisitions and Signal Analysis System V10 into
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 at left and right sides of steel plate
At 50mm；Pick-up point and impacting point are respectively at the left and right sides 25mm of steel plate surface, as shown in Figure 4；Sample frequency is
2048Hz, excitation head are steel toe, exciting force 45N.
Beneficial effects of the present invention：
1st, 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 considers to require the pad level shearing strength as large as possible), improve the fire protecting performance of pad level, increase the damping of pad level itself
It effect and makes up since the pad level intensity caused by more groove is too low the problem of.
2. the present invention carries out blasting treatment between damping layer and pad level, Coating combination can be made more secured, simultaneously
The contact area between damping material and pad level can also be increased so as to improve damping vibration attenuation effect.
3rd, compared to the pad level of stiff foam material, carbon nano-tube modification groove pad level has extraordinary anti-flammability
Can, as the component of the silencing steel rail used in subway tunnel, it can effectively prevent fires, better safety guarantee is provided.
4th, the present invention is provided with damping layer A between rail base and damping unit, on the one hand increases the secured of pad level
Degree；On the other hand ensure that rail vibrates that propagate and propagate outside in inside-out be all padded damping structure.
Description of the drawings
Fig. 1 is the structure diagram of pad level of the present invention；
The padded damping vibration attenuation silencing steel rail of Fig. 2 freedom of the present invention；
Fig. 3 padded damping vibration attenuation silencing steel rails of constraint of the present invention；
Fig. 4 multilayers of the present invention constrain padded damping vibration attenuation silencing steel rail；
Fig. 5 is the structure diagram of impulse excitation method test device of the present invention；
Wherein, 1 is foam, and 2 be groove, and 3 be rail, and 4 be damping layer I, and 5 be damping layer A, and 6 be restraint layer.
Specific embodiment
With reference to embodiment, the present invention is described further.
Embodiment 1：Freely padded damping vibration attenuation silencing steel rail
Freely padded damping vibration attenuation silencing steel rail, including rail base, damping unit and damping layer I, the damping unit
Including damping layer A and pad level, the pad level is located at close to the one side of damping layer I, and the damping layer A is located at close to rail base
The one side of layer.The pad level is carbon nano-tube modification polyurethane foam.The thickness of the damping layer A be 5mm, the pad level
Thickness for 20mm, the thickness of the damping layer I is 5mm.Wherein, it is equipped with and is embedded between the pad level and damping layer A
The silicon carbide layer on the two surface, the quantity of the diamond dust is 4.0kg/m2, the grain size of the diamond dust is 1.6mm.
The preparation of the carbon nano-tube modification polyurethane foam comprises the following steps：
(1) carbon nanotubes is modified, obtains hydroxylated carbon nanotubes；Detailed step is：(1a) uses mixed acid process
Carbon nanotubes is modified, single-walled carbon nanotube (SWCNT) is used the 3 of the 40ml concentrated sulfuric acids and nitric acid:At 1 mixed solution
Reason, then by mixture when using ultrasonication 3 small under conditions of 40 DEG C.Carboxyl can be introduced in carbon nano tube surface.
The carboxylated single-walled carbon nanotube that 20 milligrams have the first step to obtain is distributed in anhydrous tetrahydro furan and carries out ultrasonic wave by (1b)
Processing 30 minutes.Afterwards add in 2 milligrams of lithium aluminium hydride reductions and carry out ultrasonication 1 it is small when.Obtained reaction mixture 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
When drying 3 is small.It can obtain hydroxylated carbon nanotubes.
(2) the hydroxylated carbon nanotubes that step (1) obtains is added to the B component for being used to prepare pad level foam, i.e. hydroxyl
In based compound；
(3) by be mixed with the B component of hydroxyl carbon nano tube and component A isocyanates 70 DEG C temperature conditionss and
It is reacted under the pressure condition of 18MPa, you can obtain carbon nano-tube modification polyurethane foam.Wherein, the carbon nano-tube modification gathers
It is evenly distributed with several grooves in urethane foam, the interval between the adjacent hollow slot is not less than 4mm；The groove
Aperture is 4mm.Carbon nano-tube modification groove pad level shearing strength bigger compared with existing stiff foam material pad level,
The more conducively energy consumption of damping layer, therefore damping property can be improved.
The freely preparation method of padded damping vibration attenuation silencing steel rail, comprises the following steps：(1) sprayed in the side of rail base
It applies damping material and obtains damping layer A, then carry out blasting treatment；(2) carbon as pad level is poured after handling on damping layer A
Nanotube modified polyurethane foam；(3) continue spraying damping material on carbon nano-tube modification polyurethane foam and obtain damping layer
I, you can obtain the padded damping vibration attenuation silencing steel rail of freedom in padded damping vibration attenuation silencing steel rail.Damping layer uses direct spraying
Construction method, product integraty is good, simple for process, of low cost, engineer application is convenient.The specific steps of the blasting treatment
For：Spraying opportunity is 10 seconds after spraying damping material；Sandblasting air pressure is 0.6Mpa, and sandblasting distance is 1m, and temperature is 20 DEG C.Using
When more than parameter carries out blasting treatment, for gravel in each embedded half of adjacent two layers, the effect of vibration and noise reducing is best.
To verify that padded damping vibration attenuation silencing steel rail of the present invention has excellent damping property, using following methods
Vibration-testing is carried out to padded damping vibration attenuation mute floor board prepared by the above method and blank steel plate.
Test method：It is mute that padded damping vibration attenuation as floor base material is prepared using 500mm × 43mm × 3.5mm steel plates
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 acquisition and Signal Analysis System V10.Test method uses impulse excitation method, and simulation style is 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 left and right sides of the steel plate at 50mm；Pick-up point and impacting point are 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, exciting force 45N.
Embodiment 2：Freely padded damping vibration attenuation silencing steel rail
As different from Example 1, free padded damping vibration attenuation silencing steel rail, the thickness of the damping layer A are 3mm, institute
The thickness of pad level is stated as 18mm, the thickness of the damping layer I is 3mm.Wherein, between the pad level and damping layer A
Equipped with the silicon carbide layer for being embedded in the two surface, the quantity of the diamond dust is 0.5kg/m2, the grain size of the diamond dust is
1.8mm。
The preparation of the carbon nano-tube modification polyurethane foam in the step (3), will be mixed with hydroxyl carbon nano tube
B components reacted with component A isocyanates 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 slot is not less than 5mm；The aperture of the groove is 5mm.
Freely the preparation method of padded damping vibration attenuation silencing steel rail, the blasting treatment concretely comprise the following steps：Spraying opportunity
For 8 seconds after spraying damping material；Sandblasting air pressure is 0.7MPa, and sandblasting distance is 1 meter, and temperature is 25 DEG C.
Embodiment 3：Freely padded damping vibration attenuation silencing steel rail
As different from Example 1, free padded damping vibration attenuation silencing steel rail, the thickness of the damping layer A are 4mm, institute
The thickness of pad level is stated as 22mm, the thickness of the damping layer I is 4mm.
Embodiment 4：Constrain padded damping vibration attenuation silencing steel rail
As different from Example 1, padded damping vibration attenuation silencing steel rail is constrained, the damping layer I is away from damping unit
One side is additionally provided with restraint layer, and the restraint layer is steel plate.The thickness of the damping layer A is 2mm, and the thickness of the pad level is
15mm, the thickness of the damping layer I is 2mm.The quantity of the diamond dust is 1.5kg/m2, and the grain size of the diamond dust is
2.0mm。
The preparation of the carbon nano-tube modification polyurethane foam, step (3) will be mixed with the B component of hydroxyl carbon nano tube
It is reacted with A components isocyanates under 60 DEG C of temperature conditionss and the pressure condition of 16MPa, you can obtain carbon nano-tube modification
Polyurethane foam.Interval between the adjacent hollow slot is not less than 6mm；The aperture of the groove is 6mm.
The preparation method of padded damping vibration attenuation silencing steel rail is constrained, step (3) is on carbon nano-tube modification polyurethane foam
Continue to spray damping material, obtain damping layer I；(4) in the steel plate that damping layer I outer wrappings thickness is 2mm as restraint layer, you can
Obtain the padded damping vibration attenuation silencing steel rail of constraint in padded damping vibration attenuation silencing steel rail.The specific steps of the blasting treatment
For：Spraying opportunity is 9 seconds after spraying damping material；Sandblasting air pressure is 0.8MPa, and sandblasting distance is 1 meter, and temperature is 22 DEG C.
Embodiment 5：Constrain padded damping vibration attenuation silencing steel rail
As different from Example 4, padded damping vibration attenuation silencing steel rail is constrained, the thickness of the damping layer A is 3mm, institute
The thickness of pad level is stated as 16mm, the thickness of the damping layer I is 3mm.The quantity of the diamond dust is 0.8kg/m2, it is described
The grain size of diamond dust is 1.9mm.
The preparation of the carbon nano-tube modification polyurethane foam, step (3) will be mixed with the B component of hydroxyl carbon nano tube
It is reacted with A components isocyanates under 65 DEG C of temperature conditionss and the pressure condition of 17.5MPa, you can obtain carbon nanotubes and change
Property polyurethane foam.Interval between the adjacent hollow slot is not less than 4.5mm；The aperture of the groove is 5.5mm.
The preparation method of padded damping vibration attenuation silencing steel rail is constrained, step (4) is 1mm's in damping layer I outer wrappings thickness
Steel plate is as restraint layer, you can obtains the padded damping vibration attenuation silencing steel rail of constraint in padded damping vibration attenuation silencing steel rail.It is described
Blasting treatment concretely comprises the following steps：Spraying opportunity is 9 seconds after spraying damping material；Sandblasting air pressure is 0.7MPa, and sandblasting distance is 1
Rice, temperature are 24 DEG C.
Embodiment 6：Constrain padded damping vibration attenuation silencing steel rail
As different from Example 4, padded damping vibration attenuation silencing steel rail is constrained, the thickness of the damping layer A is 1mm, institute
The thickness of pad level is stated as 14mm, the thickness of the damping layer I is 1mm.
Embodiment 7：Multilayer constrains padded damping vibration attenuation silencing steel rail
As different from Example 1, multilayer constrains padded damping vibration attenuation silencing steel rail, and the damping layer I is single away from damping
The one side of member is additionally provided with restraint layer described in restraint layer as steel plate；The quantity of the damping unit is 2.The thickness of the damping layer A
For 1mm, the thickness of the pad level is 10mm, and the thickness of the damping layer I is 1mm.The quantity of the diamond dust is
1.2kg/m2, the grain size of the diamond dust is 1.7mm.
The preparation of the carbon nano-tube modification polyurethane foam, step (3) will be mixed with the B component of hydroxyl carbon nano tube
It is reacted with A components isocyanates under 75 DEG C of temperature conditionss and the pressure condition of 16.5MPa, you can obtain carbon nanotubes and change
Property polyurethane foam.Interval between the adjacent hollow slot is not less than 5.5mm；The aperture of the groove is 4.5mm.
Multilayer constrains the preparation method of padded damping vibration attenuation silencing steel rail, further includes between step (2) and step (3)
The step of (2a)：Continue to spray damping material, sandblasting on the carbon nano-tube modification polyurethane foam of outermost damping unit
Processing；Pour the carbon nano-tube modification polyurethane foam as pad level；Repeat step (2a), until the number of damping unit
Amount reaches requirement；(4) in the steel plate that damping layer I outer wrappings thickness is 3mm as restraint layer, you can it is quiet to obtain padded damping vibration attenuation
Multilayer in sound rail constrains padded damping vibration attenuation silencing steel rail.
Embodiment 8：Multilayer constrains padded damping vibration attenuation silencing steel rail
As different from Example 7, multilayer constrains padded damping vibration attenuation silencing steel rail, and the quantity of the damping unit is 3.
The thickness of the damping layer A is 1.5mm, and the thickness of the pad level is 12mm, and the thickness of the damping layer I is 1.5mm.Institute
The quantity for stating diamond dust is 1.0kg/m2, the grain size of the diamond dust is 1.8mm.
The preparation of the carbon nano-tube modification polyurethane foam, step (3) will be mixed with the B component of hydroxyl carbon nano tube
It is reacted with A components isocyanates under 70 DEG C of temperature conditionss and the pressure condition of 17MPa, you can obtain carbon nano-tube modification
Polyurethane foam.Interval between the adjacent hollow slot is not less than 5mm；The aperture of the groove is 5mm.
Multilayer constrains the preparation method of padded damping vibration attenuation silencing steel rail, comprises the following steps：Repeat step (2a) 2
It is secondary；(4) in the steel plate that damping layer I outer wrappings thickness is 2mm as restraint layer, you can obtain padded damping vibration attenuation silencing steel rail
In multilayer constrain padded damping vibration attenuation silencing steel rail.
Embodiment 9：Multilayer constrains padded damping vibration attenuation silencing steel rail
As different from Example 7, multilayer constrains padded damping vibration attenuation silencing steel rail, and the quantity of the damping unit is 3.
The thickness of the damping layer A is 0.5mm, and the thickness of the pad level is 8mm, and the thickness of the damping layer I is 0.5mm.
Multilayer constrains the preparation method of padded damping vibration attenuation silencing steel rail, comprises the following steps：Repeat step (2a) 2
It is secondary；(4) in the steel plate that damping layer I outer wrappings thickness is 2mm as restraint layer, you can obtain padded damping vibration attenuation silencing steel rail
In multilayer constrain padded damping vibration attenuation silencing steel rail.
1 embodiment 1-9 experiment result lists of table
| Single order fissipation factor | Second order fissipation factor | The total grade value of vibration acceleration | |
| Blank steel plate | 0.014 | 0.016 | 158.0 |
| Embodiment 1 | 0.134 | 0.167 | 144.5 |
| Embodiment 2 | 0.125 | 0.156 | 145.1 |
| Embodiment 3 | 0.129 | 0.161 | 144.8 |
| Embodiment 4 | 0.161 | 0.196 | 140.6 |
| Embodiment 5 | 0.169 | 0.201 | 140.1 |
| Embodiment 6 | 0.155 | 0.189 | 141.9 |
| Embodiment 7 | 0.193 | 0.234 | 139.2 |
| Embodiment 8 | 0.224 | 0.257 | 138.0 |
| Embodiment 9 | 0.212 | 0.243 | 138.5 |
The energy dissipation capacity of fissipation factor representative structure, is the bigger the better；The total grade value of vibration acceleration shows the vibration feelings of structure
Condition, it is the smaller the better.As shown in Table 1, compared with blank steel plate, the vibration and noise reducing silencing steel rail of embodiment 1-9 preparations, fissipation factor
Increase an order of magnitude, the total grade value of vibration acceleration then reduces 13-20dB.Wherein, it is best with 8 effect of example, with blank plate phase
More total than vibration acceleration grade of value can reduce 20dB；Remaining example is substantially reduced compared to the total grade value of blank plate vibration acceleration,
Fissipation factor is significantly increased compared to blank plate.Illustrate that multilayer constrains the effect of vibration and noise reduction of padded damping vibration attenuation silencing steel rail
It is best.
Claims (10)
1. padded damping vibration attenuation silencing steel rail, it is characterised in that：Including rail base, damping unit and damping layer I, the damping
Unit includes damping layer A and pad level, and the pad level is located at close to the one side of damping layer I, and the damping layer A is located at close to steel
The one side of base of the rail layer；The thickness ratio of the pad level and damping layer A are 4-16；The thickness ratio of the pad level and damping layer I is
4-16；The pad level is carbon nano-tube modification polyurethane foam；The preparation of the carbon nano-tube modification polyurethane foam includes
Following steps：(1) carbon nanotubes is modified, obtains hydroxylated carbon nanotubes；(2) step (1) obtains hydroxylated
Carbon nanotubes is added to the B component for being used to prepare pad level foam, i.e., in hydroxy compounds；(3) hydroxylating carbon will be mixed with to receive
The B component of mitron is reacted with component A isocyanates, you can obtains carbon nano-tube modification polyurethane foam.
2. padded damping vibration attenuation silencing steel rail according to claim 1, it is characterised in that：The poly- ammonia of carbon nano-tube modification
It is evenly distributed with several grooves in ester foam, the aperture of the groove is 4-6mm, the interval between the adjacent hollow slot
For 4-6mm.
3. padded damping vibration attenuation silencing steel rail according to claim 1 or 2, it is characterised in that：It is anti-in the step (3)
Answer 60-80 DEG C of temperature, reaction pressure 15-18MPa.
4. padded damping vibration attenuation silencing steel rail according to claim 3, it is characterised in that：The damping layer I is away from damping
The one side of unit is additionally provided with restraint layer, and the restraint layer is steel plate；The quantity of the damping unit is 1-3.
5. padded damping vibration attenuation silencing steel rail according to claim 3, it is characterised in that：It is padded in the damping unit
The silicon carbide layer for being embedded in the two surface is equipped between layer and damping layer A, the quantity of the diamond dust is 0.5-1.5kg/m2,
The grain size of the diamond dust is 1.6-2.0mm.
6. the preparation method of padded damping vibration attenuation silencing steel rail, it is characterised in that：Comprise the following steps：(1) in rail base
Side spraying damping material obtains damping layer A, then carries out blasting treatment；(2) poured after handling on damping layer A as padded
The carbon nano-tube modification polyurethane foam of layer completes a damping unit；(3) continue on carbon nano-tube modification polyurethane foam
Spraying damping material obtains damping layer I；The padded damping vibration attenuation of freedom that can obtain in padded damping vibration attenuation silencing steel rail is mute
Rail.
7. the preparation method of padded damping vibration attenuation silencing steel rail according to claim 6, it is characterised in that：The damping layer
The thickness of A is 3-5mm, and the thickness of the pad level is 18-22mm, and the thickness of the damping layer I is 3-5mm.
8. the preparation method of padded damping vibration attenuation silencing steel rail according to claim 6, it is characterised in that：Further include step
(4)：In the steel plate that damping layer I outer wrappings thickness is 1-3mm as restraint layer, you can obtain in padded damping vibration attenuation silencing steel rail
The padded damping vibration attenuation silencing steel rail of constraint；The thickness of the damping layer A is 1-3mm, and the thickness of the pad level is 14-
16mm, the thickness of the damping layer I is 1-3mm.
9. the preparation method of padded damping vibration attenuation silencing steel rail according to claim 6, it is characterised in that：It further includes and is located at
The step of between step (2) and step (3) (2a)：On the carbon nano-tube modification polyurethane foam of outermost damping unit after
Continuous spraying damping material, blasting treatment；Then the carbon nano-tube modification polyurethane foam as pad level is poured；Repeat to walk
Suddenly (2a), until the quantity of damping unit reaches requirement；Step (4)：Make in the steel plate that damping layer I outer wrappings thickness is 1-3mm
For restraint layer, you can the multilayer obtained in padded damping vibration attenuation silencing steel rail constrains padded damping vibration attenuation silencing steel rail；The resistance
The thickness of Buddhist nun's layer A is 0.5-1.5mm, and the thickness of the pad level is 8-12mm, and the thickness of the damping layer I is 0.5-
1.5mm。
10. the preparation method of padded damping vibration attenuation silencing steel rail according to claim 9, it is characterised in that：The sandblasting
Processing concretely comprises the following steps：Spraying opportunity is 8-10s after spraying damping material；Sandblasting air pressure be 0.6-0.8MPa, sandblasting distance
For 1m, temperature is 15-25 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710033145.5A CN106758570B (en) | 2017-01-18 | 2017-01-18 | Padded damping vibration attenuation silencing steel rail of carbon nano-tube modification and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710033145.5A CN106758570B (en) | 2017-01-18 | 2017-01-18 | Padded damping vibration attenuation silencing steel rail of carbon nano-tube modification and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106758570A CN106758570A (en) | 2017-05-31 |
| CN106758570B true CN106758570B (en) | 2018-05-18 |
Family
ID=58946133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710033145.5A Expired - Fee Related CN106758570B (en) | 2017-01-18 | 2017-01-18 | Padded damping vibration attenuation silencing steel rail of carbon nano-tube modification and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106758570B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107351465A (en) * | 2017-07-19 | 2017-11-17 | 北京海月星科技有限公司 | A kind of preparation method of heat-insulated vibration suppression material and application |
| CN110864836B (en) * | 2019-11-15 | 2021-09-10 | 华东交通大学 | Longitudinal force detection method based on steel rail |
| CN112250820A (en) * | 2020-10-21 | 2021-01-22 | 盐城市恒丰海绵有限公司 | Sinking-bottom expanded polyurethane with high tearing property and preparation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373655B (en) * | 2011-11-08 | 2013-06-05 | 江阴海达橡塑股份有限公司 | Crossed mute steel rail |
| JP5829533B2 (en) * | 2012-01-19 | 2015-12-09 | 公益財団法人鉄道総合技術研究所 | Rail soundproof structure |
| KR101526655B1 (en) * | 2013-03-21 | 2015-06-05 | 현대자동차주식회사 | Sound-absorbing material for automobile by urethane foam with carbon nano-tube and its preparing method |
| CN105220066B (en) * | 2015-10-29 | 2017-05-10 | 中北大学 | Nanometer pearlite steel and preparation method thereof |
| CN205763804U (en) * | 2016-06-28 | 2016-12-07 | 四川睿铁科技有限责任公司 | A kind of silencing steel rail production line cast operation auxiliary mould |
-
2017
- 2017-01-18 CN CN201710033145.5A patent/CN106758570B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN106758570A (en) | 2017-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106758570B (en) | Padded damping vibration attenuation silencing steel rail of carbon nano-tube modification and preparation method thereof | |
| CN105908581B (en) | A kind of composite particles damper for reducing rail vibration noise | |
| Chen et al. | Dynamic behaviour of sandwich structure containing spring-mass resonators | |
| JP5836941B2 (en) | Sonic barrier for audible acoustic frequency management | |
| WO2018120697A1 (en) | Sound-absorbing device for sound generating device, preparation method thereof and sound generating device module | |
| Sheng et al. | Modelling wheel/rail rolling noise for a high-speed train running along an infinitely long periodic slab track | |
| Jin et al. | Development of tuned particle impact damper for reduction of transient railway vibrations | |
| Sun et al. | A magnetorheological elastomer rail damper for wideband attenuation of rail noise and vibration | |
| JP2007167632A5 (en) | ||
| Balakrishnan et al. | Influence of MWCNT fillers on vibroacoustic characteristics of polymer nanocomposite and coated aircraft panels | |
| Zangiabadi et al. | The role of hollow silica nanospheres and rigid silica nanoparticles on acoustic wave absorption of flexible polyurethane foam nanocomposites | |
| CN108831431A (en) | Full range spreads silencing apparatus and vent passages sound-attenuating system | |
| Lapčík et al. | Study of the material engineering properties of high-density poly (ethylene)/perlite nanocomposite materials | |
| CN106696381B (en) | Padded damping vibration attenuation mute floor board | |
| CN106638174B (en) | Graphene oxide is modified padded damping vibration attenuation silencing steel rail and preparation method thereof | |
| Zhan et al. | A new-structured nanocarbon cushion with highly impact-resistant properties | |
| CN110016842A (en) | It is a kind of for inhibiting the periodical bump leveller of floating plate vibration noise | |
| CN110184861A (en) | A kind of compound passive energy dissipation denoising device | |
| JPH10252021A (en) | Sound absorbing material | |
| Marjani et al. | Performance analysis of piezoelectric actuators in railway wheel squealing noise mitigation | |
| CN202764985U (en) | Rail train wall structure | |
| CN209633434U (en) | A kind of blender noise reduction partition | |
| Chen et al. | Enhancement of properties of walnut shell/attapulgite/polyvinyl chloride composites with ultrasonic and hydrothermal treatment | |
| Xie et al. | Acoustic absorption of ultralight graphene-based cellular monoliths | |
| JP5900879B2 (en) | Method for producing hardened cement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180518 Termination date: 20210118 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |