WO2021098233A1 - Phonon-like crystal composite material, preparation method therefor and use thereof - Google Patents
Phonon-like crystal composite material, preparation method therefor and use thereof Download PDFInfo
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- WO2021098233A1 WO2021098233A1 PCT/CN2020/101207 CN2020101207W WO2021098233A1 WO 2021098233 A1 WO2021098233 A1 WO 2021098233A1 CN 2020101207 W CN2020101207 W CN 2020101207W WO 2021098233 A1 WO2021098233 A1 WO 2021098233A1
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- 239000002131 composite material Substances 0.000 title claims abstract description 26
- 239000013078 crystal Substances 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 5
- 239000011083 cement mortar Substances 0.000 claims abstract description 18
- 239000003822 epoxy resin Substances 0.000 claims abstract description 17
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 17
- 239000002245 particle Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000004575 stone Substances 0.000 claims description 15
- 238000013016 damping Methods 0.000 claims description 13
- 239000010410 layer Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 6
- 239000011247 coating layer Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 13
- 230000000737 periodic effect Effects 0.000 abstract description 8
- 239000011248 coating agent Substances 0.000 abstract description 7
- 238000000576 coating method Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 abstract description 2
- 229920000642 polymer Polymers 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 241001669679 Eleotris Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1029—Macromolecular compounds
- C04B20/1037—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
Definitions
- the invention belongs to the technical field of subway damping materials, and specifically relates to a method for manufacturing a phononic crystal composite material damping track bed.
- the reasons for these problems are determined by the characteristics of my country's shallow underground subway.
- the buried depth of the subway in my country is mostly about 15m, which belongs to the shallow-buried subway.
- Most of the shallow ground is the Quaternary soft soil layer, and the subway usually adopts a monolithic track bed structure.
- the rail fastener adopts a double elastic cushion design. , That is, rubber pads with a smaller static stiffness coefficient are installed under the iron pads between the rails and sleepers.
- the long-term effect of subway train vibration causes the cumulative deformation of the weak soil layer around the subway to increase, which greatly increases the operation. Maintenance costs.
- the track bed is cast with C35 concrete, which is a rigid track bed and basically does not have any attenuation effect on train vibration.
- the basic track bed in the general section of the subway project does not use any vibration reduction measures, but uses vibration reduction facilities such as floating slab track beds and elastic short sleeper monolithic track beds in the areas where hospitals, factories and agencies with vibration reduction requirements are located. Tracks, rubber pads and other measures are used to reduce vibration, but these measures are difficult to achieve good vibration reduction and vibration isolation effects.
- the vibration attenuation is 6-10dB, the service life is limited, and the price is expensive.
- Metro train vibrations mainly propagate outward with specific frequency waves. If attenuating materials for these frequency waves can be found, vibration reduction can be achieved. Depending on the structure of the subway, this can be achieved with appropriate track bed materials. Based on the theory of solid physics, if a periodic structure material is used and the band gap feature of the periodic structure material is used, the effect of vibration reduction can be achieved. However, conventional phononic crystal composite materials with uniform periodic structure are difficult to open the low frequency band gap.
- the present invention provides a phononic crystal-like composite material subway vibration damping track bed.
- the material is a polymer composed of a multi-cell, each polymer has the characteristics of ordinary periodic structure, the size of the crystal packet in the polymer is staggered, and it can open the low frequency band below 50Hz. It is used for the vibration reduction of the subway, which is beneficial to improve the subway.
- the damping effect has the value of promotion and application.
- a phonon-like crystal composite material using stones as a scatterer, an epoxy resin layer (thickness 8-10mm) wrapped around the epoxy resin layer, and poured into concrete.
- the scatterer is a uniform stone with a particle size of 0.5-3.0 cm and a non-single particle size.
- the preparation method of the above-mentioned phononic crystal composite material includes the following steps:
- Step 1 Select uniform stones with a particle size of 0.5-3.0 cm and a non-single particle size as the scatterer;
- Step 2 Wrap the stones with epoxy resin, the thickness of the coating layer is 8-10mm;
- Step 3 prepare cement mortar, mix the epoxy resin-coated stone material and cement mortar evenly prepared in step 2, and wrap the cement mortar with the thickness of the cement coating layer being 10-15mm to form a composite material with phononic crystal arrangement;
- the strength is 40-45MPa.
- the obtained phononic crystal composite material is reinforced to make a subway damping track bed preform.
- Such a phononic crystal composite damping track bed can open the low frequency band gap below 50 Hz and improve the vibration damping effect.
- the reinforcement ratio must meet the requirements of subway stray current control.
- the phononic-like crystal composite material of the present invention is a composite material with a periodic structure, and from the inside to the outside, it is a stone-epoxy resin layer-cement mortar layer.
- FIG. 1 is a schematic diagram of the composition of the phononic-like crystal composite material of Example 1.
- FIG. 1 is a schematic diagram of the composition of the phononic-like crystal composite material of Example 1.
- Step 1 Select uniform stones with a particle size of 1.0-3.0 cm and a non-single particle size as the scatterer of the phononic crystal composite material;
- Step 2 Mix the stones of step 1 with epoxy resin evenly, so that the epoxy resin wraps the stones;
- Step 3 Prepare cement mortar, mix the epoxy resin-coated stone material and cement mortar evenly prepared in step 2, so that the cement mortar wraps the epoxy resin to form a composite material with phononic crystal arrangement, as shown in Figure 1;
- Step 4 Reinforce the phononic-like crystal composite material obtained in Step 3 into a preform of a subway damping track bed.
Abstract
Disclosed are a phonon-like crystal composite material, a preparation method therefor and a use thereof. The material is obtained by coating the exterior of pebbles, which act as scatterers and have a particle size of 0.5-3.0 cm and non-single particle sizes, with an epoxy resin layer having a thickness of 8-10 mm; and mixing the scatterers coated with the epoxy resin layer with cement mortar, and performing pouring. An aggregated body is formed by multiple cells and said aggregated body is in a periodic distribution, thereby forming a phonon-like crystal periodic structure composite material. The phonon-like crystal periodic structure composite material can open low-frequency band gaps of 50 Hz or less, is used for subway vibration reduction and is beneficial for improving a subway vibration reduction effect.
Description
本发明属于地铁减振材料技术领域，具体涉及一种似声子晶体复合材料减振道床制作方法。The invention belongs to the technical field of subway damping materials, and specifically relates to a method for manufacturing a phononic crystal composite material damping track bed.
我国地铁目前正处在建设与运营并重的阶段，确保地铁运营安全，既是一项重要的民生工程，也是城市发展绿色经济的战略工程，关系到每个人的出行安全。事实上，由于地铁的动力传输系统——轮轨系统，使得地铁列车振动成为扰民因素，地铁列车运营引起的振动通过周围地层向外传播，进一步诱发建筑物的二次振动，对建筑物的结构安全以及居民的工作和日常生活都产生了相当程度的影响。my country's subway is currently in the stage of equal emphasis on construction and operation. Ensuring the safety of subway operation is not only an important livelihood project, but also a strategic project for the development of a green economy in the city, and it is related to everyone's travel safety. In fact, due to the power transmission system of the subway-the wheel-rail system, the vibration of the subway train becomes a disturbing factor. The vibration caused by the operation of the subway train spreads outwards through the surrounding stratum, and further induces the secondary vibration of the building. Safety and the work and daily life of residents have had a considerable impact.
产生这些问题的原因，是由我国的浅埋深地铁特点决定的。我国地铁的埋深大多在15m左右，属于浅埋地铁，地表浅层大多为第四系松软土层，而且地铁通常采用整体道床结构，为增加轨道的弹性，钢轨扣件采用双弹性垫层设计，即在钢轨和轨枕用之间扣件铁垫板下均设静刚度系数较小的橡胶垫板，地铁列车振动长期作用，致使地铁周边软弱土层的累积变形不断增大，大大增加了运营维护成本。The reasons for these problems are determined by the characteristics of my country's shallow underground subway. The buried depth of the subway in my country is mostly about 15m, which belongs to the shallow-buried subway. Most of the shallow ground is the Quaternary soft soil layer, and the subway usually adopts a monolithic track bed structure. In order to increase the elasticity of the track, the rail fastener adopts a double elastic cushion design. , That is, rubber pads with a smaller static stiffness coefficient are installed under the iron pads between the rails and sleepers. The long-term effect of subway train vibration causes the cumulative deformation of the weak soil layer around the subway to increase, which greatly increases the operation. Maintenance costs.
现有技术中，道床采用C35的混凝土浇注，属于刚性道床，对列车振动基本上没有任何衰减作用。地铁工程在一般区间段的基础道床都没有采用任何减振措施，只是在医院、有减振要求的厂房、机关等部位所在区域采用减振设施，如浮置板式道床、弹性短轨枕式整体道床轨道、橡胶垫板等措施进行减振，但这些措施难以达到好的减振隔振效果，振动衰减6-10dB，使用寿命有限，价格昂贵。In the prior art, the track bed is cast with C35 concrete, which is a rigid track bed and basically does not have any attenuation effect on train vibration. The basic track bed in the general section of the subway project does not use any vibration reduction measures, but uses vibration reduction facilities such as floating slab track beds and elastic short sleeper monolithic track beds in the areas where hospitals, factories and agencies with vibration reduction requirements are located. Tracks, rubber pads and other measures are used to reduce vibration, but these measures are difficult to achieve good vibration reduction and vibration isolation effects. The vibration attenuation is 6-10dB, the service life is limited, and the price is expensive.
地铁列车振动主要以特定的频率波向外传播，如能找到对这些频率波的衰减材料，就可以实现减振。依据地铁结构形式，适当的道床材料上可以达到这一目的。基于固体物理的理论，如采用一种周期性结构材料，并利用周期性结构材料带隙特征，就可以达到减振的效果。但常规的均匀周期性结构声子晶体复合材料难以打开低频带隙。Metro train vibrations mainly propagate outward with specific frequency waves. If attenuating materials for these frequency waves can be found, vibration reduction can be achieved. Depending on the structure of the subway, this can be achieved with appropriate track bed materials. Based on the theory of solid physics, if a periodic structure material is used and the band gap feature of the periodic structure material is used, the effect of vibration reduction can be achieved. However, conventional phononic crystal composite materials with uniform periodic structure are difficult to open the low frequency band gap.
发明内容Summary of the invention
技术问题：本发明为了解决现有地铁减振所采用的刚性道床对列车振动基本上没有任何衰减作用的技术问题，提供一种似声子晶体复合材料地铁减振道床，该似声子晶体复合材料是由一个多原胞构成的一个聚合体，各聚合体具有普通周期性结构特征，聚合体内晶包大小错开，能打开50Hz以下的低频带隙，用于地铁的减振，有利于提高地铁减振效果，在具有推广应用价值。Technical problem: In order to solve the technical problem that the rigid track bed used in the existing subway vibration damping basically does not have any attenuation effect on train vibration, the present invention provides a phononic crystal-like composite material subway vibration damping track bed. The material is a polymer composed of a multi-cell, each polymer has the characteristics of ordinary periodic structure, the size of the crystal packet in the polymer is staggered, and it can open the low frequency band below 50Hz. It is used for the vibration reduction of the subway, which is beneficial to improve the subway. The damping effect has the value of promotion and application.
技术方案：Technical solutions:
为了实现上述发明目的，本发明采用了以下技术方案：In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical solutions:
一种似声子晶体复合材料，以石子为散射体，外面包裹环氧树脂层(厚度8-10mm)，包裹环氧树脂层的石子，浇筑在混凝土中。A phonon-like crystal composite material, using stones as a scatterer, an epoxy resin layer (thickness 8-10mm) wrapped around the epoxy resin layer, and poured into concrete.
散射体是粒径为0.5-3.0cm、且非单一粒径的均匀石子。The scatterer is a uniform stone with a particle size of 0.5-3.0 cm and a non-single particle size.
上述似声子晶体复合材料的制备方法，包括以下步骤：The preparation method of the above-mentioned phononic crystal composite material includes the following steps:
步骤1，选用粒径为0.5-3.0cm、且非单一粒径的均匀石子作为散射体； Step 1. Select uniform stones with a particle size of 0.5-3.0 cm and a non-single particle size as the scatterer;
步骤2，用环氧树脂将石子包裹，包裹层的厚度为8-10mm； Step 2. Wrap the stones with epoxy resin, the thickness of the coating layer is 8-10mm;
步骤3，配制水泥砂浆，将步骤2制得的环氧树脂包裹石子料与水泥砂浆均匀拌和，采用水泥砂浆包裹，水泥包裹层的厚度在10-15mm，形成似声子晶体排列的复合材料；强度为40-45MPa。 Step 3, prepare cement mortar, mix the epoxy resin-coated stone material and cement mortar evenly prepared in step 2, and wrap the cement mortar with the thickness of the cement coating layer being 10-15mm to form a composite material with phononic crystal arrangement; The strength is 40-45MPa.
将所得似声子晶体复合材料配筋，制成地铁减振道床预制件，这样的似声子晶体复合材料减振道床能够打开50Hz以下的低频带隙，提高减振效果。配筋率要满足地铁杂散电流控制要求。The obtained phononic crystal composite material is reinforced to make a subway damping track bed preform. Such a phononic crystal composite damping track bed can open the low frequency band gap below 50 Hz and improve the vibration damping effect. The reinforcement ratio must meet the requirements of subway stray current control.
技术效果：Technical effect:
(1)、本发明的似声子晶体复合材料，是一种周期性结构的复合材料，从内到外依次为石子-环氧树脂层-水泥砂浆层。(1) The phononic-like crystal composite material of the present invention is a composite material with a periodic structure, and from the inside to the outside, it is a stone-epoxy resin layer-cement mortar layer.
(2)、用这种多晶胞聚合体构成的复合材料制作成地铁道床，打开50Hz以下的低频带隙，提高减振效果。(2) The composite material composed of this polycell polymer is used to make the subway track bed, which opens the low frequency band gap below 50Hz to improve the vibration damping effect.
图1为实施例1的似声子晶体复合材料的组成示意图。FIG. 1 is a schematic diagram of the composition of the phononic-like crystal composite material of Example 1. FIG.
其中1-石子，2-环氧树脂包裹层，3-水泥砂浆。Among them, 1-stone, 2-epoxy resin coating, 3-cement mortar.
下面结合附图对本发明的技术方案作进一步说明。The technical scheme of the present invention will be further described below in conjunction with the accompanying drawings.
实施例1不同反应条件下所得似声子晶体复合材料的性能考核Example 1 Performance assessment of phononic-like crystal composite materials obtained under different reaction conditions
表1Table 1
上述实施例1-6的制备方法如下：The preparation methods of the foregoing Examples 1-6 are as follows:
步骤1，选用粒径为1.0-3.0cm、非单一粒径的均匀石子作为似声子晶体复合材料的散射体； Step 1. Select uniform stones with a particle size of 1.0-3.0 cm and a non-single particle size as the scatterer of the phononic crystal composite material;
步骤2，将步骤1的石子与环氧树脂均匀拌和，使环氧树脂将石子包裹；Step 2: Mix the stones of step 1 with epoxy resin evenly, so that the epoxy resin wraps the stones;
步骤3，配制水泥砂浆，将步骤2制得的环氧树脂包裹石子料与水泥砂浆均匀拌和，使水泥砂浆将环氧树脂包裹，形成似声子晶体排列的复合材料，如图1所示；Step 3: Prepare cement mortar, mix the epoxy resin-coated stone material and cement mortar evenly prepared in step 2, so that the cement mortar wraps the epoxy resin to form a composite material with phononic crystal arrangement, as shown in Figure 1;
步骤4，将步骤3所得似声子晶体复合材料配筋，制成地铁减振道床预制件。Step 4: Reinforce the phononic-like crystal composite material obtained in Step 3 into a preform of a subway damping track bed.
实施例2各参数对材料性能的影响考核Example 2 Assessment of the influence of various parameters on material properties
1、发明人经过不同方案的实践测试，发现散射体的粒径分布对结果有较大影响，单一粒径的散射体难以打开50Hz以下的带隙，如实施例3、4；需要不同粒径散射体的组合成多晶胞聚合体才能打开50Hz的带隙，如实施例1、2、6、7、8，主要因为多晶胞聚合体内部不同大小晶胞间振动波相互干涉形成局域共振作用打开了超低频带隙，克服了常规声子晶体的局限。1. Through practical tests of different schemes, the inventor found that the particle size distribution of the scatterer has a greater impact on the results. It is difficult for a scatterer with a single particle size to open the band gap below 50 Hz, as in Examples 3 and 4; different particle sizes are required The combination of scatterers into a polycell polymer can open the 50Hz band gap, as in Examples 1, 2, 6, 7, and 8, mainly because the vibration waves of different sizes inside the polycell polymer interfere with each other to form a local area. The resonance effect opens the ultra-low band gap and overcomes the limitations of conventional phononic crystals.
2、树脂包裹层和水泥砂浆包裹层的厚度则对该性能影响不大。2. The thickness of the resin coating and cement mortar coating has little effect on the performance.
3、如上所述，单一粒径的散射体难以打开50Hz以下的带隙，但是调整水泥砂浆包裹厚度也能实现这一功能，如实施例5，调整水泥砂浆包裹厚度，虽然也能打开50Hz以下的带隙，但是带隙宽度很窄，其减振效果不明显，水泥砂浆包裹厚度变化不是主要作用。3. As mentioned above, it is difficult for a scatterer with a single particle size to open the band gap below 50Hz, but adjusting the thickness of the cement mortar coating can also achieve this function, as in Example 5, adjusting the thickness of the cement mortar coating, although it can also be opened below 50Hz However, the band gap width is very narrow, and its vibration damping effect is not obvious. The change in the thickness of the cement mortar coating is not the main effect.
Claims (4)
- 一种似声子晶体复合材料，其特征在于，包括散射体，散射体外面包裹环氧树脂层，水泥砂浆层浇筑在散射体的四周。A phononic crystal-like composite material is characterized by comprising a scatterer, an epoxy resin layer is wrapped on the outer surface of the scatterer, and a cement mortar layer is poured around the scatterer.
- 根据权利要求1所得的似声子晶体复合材料，其特征在于，是所述的散射体是粒径为0.5-3.0cm、且非单一粒径的石子；环氧树脂层的厚度为8-10mm；水泥砂浆层的厚度在10-15mm。The phononic-like crystal composite material obtained according to claim 1, wherein the scatterer is a stone with a particle size of 0.5-3.0 cm and a non-single particle size; the thickness of the epoxy resin layer is 8-10 mm ; The thickness of the cement mortar layer is 10-15mm.
- 根据权利要求1所述似声子晶体复合材料的制备方法，其特征在于：包括以下步骤：The preparation method of phononic-like crystal composite material according to claim 1, characterized in that it comprises the following steps:步骤1，选用粒径为0.5-3.0cm、且非单一粒径的均匀石子作为散射体；Step 1. Select uniform stones with a particle size of 0.5-3.0 cm and a non-single particle size as the scatterer;步骤2，将步骤1的石子与环氧树脂均匀拌和，用环氧树脂将石子包裹，包裹层的厚度为8-10mm；Step 2: Mix the stones of step 1 with epoxy resin evenly, and wrap the stones with epoxy resin. The thickness of the coating layer is 8-10mm;步骤3，配制水泥砂浆，将步骤2制得的环氧树脂包裹石子料与水泥砂浆均匀拌和，使水泥砂浆将散射体包裹，包裹层的厚度在10-15mm，形成似声子晶体排列的复合材料，强度为40-45MPa。Step 3. Prepare cement mortar, mix the epoxy resin-coated stone material and cement mortar made in step 2 evenly, so that the cement mortar will wrap the scatterer, and the thickness of the coating layer will be 10-15mm to form a composite of phononic crystal arrangement. Material, the strength is 40-45MPa.
- 根据权利要求1所得似声子晶体复合材料的用于制备地铁减振道床的用途，是将所得似声子晶体复合材料配筋，制成地铁减振道床。The use of the phononic-like crystal composite material obtained according to claim 1 for preparing a subway damping track bed is to reinforce the obtained phononic crystal composite material to make a subway damping track bed.
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| CN110950563A (en) * | 2019-11-19 | 2020-04-03 | 东南大学 | Phononic crystal-like composite material, preparation method and application thereof |
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| CN109979425A (en) * | 2019-04-23 | 2019-07-05 | 东南大学 | A kind of embedded type periodic structure plate with graded index |
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| CN105951550A (en) * | 2016-05-10 | 2016-09-21 | 四川理工学院 | Construction method for cement concrete subgrade |
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