CN113291413B - Vibration reduction lamination block for LNG transport ship and preparation method thereof - Google Patents
Vibration reduction lamination block for LNG transport ship and preparation method thereof Download PDFInfo
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- CN113291413B CN113291413B CN202110655048.6A CN202110655048A CN113291413B CN 113291413 B CN113291413 B CN 113291413B CN 202110655048 A CN202110655048 A CN 202110655048A CN 113291413 B CN113291413 B CN 113291413B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
- B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
- B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
Abstract
The invention discloses a vibration reduction lamination block for an LNG transport ship and a preparation method thereof. The damping laminated block comprises a multilayer composite material laminated layer and a tubular reinforcing rib vertically inserted in the multilayer composite material laminated layer; the multilayer composite material laminated layer is formed by laminating low-temperature-resistant casting polyurethane and fiber cloth; the tubular reinforcing rib is of a hollow tubular structure and is formed by winding low-temperature-resistant casting polyurethane and fiber cloth in a rotating mode. The damping laminated block has good low-temperature resistance (the using temperature can reach-196 ℃), and has excellent shear resistance in the direction perpendicular to the laminated layer and also in the direction parallel to the laminated layer due to the special structural design; the low-temperature-resistant support unit can be used as a low-temperature-resistant support unit of a liquid cargo tank body of an LNG transport ship or other low-temperature-resistant and impact-resistant structural units.
Description
Technical Field
The invention relates to the field of LNG transport ships, in particular to a vibration reduction lamination block for an LNG transport ship and a preparation method thereof.
Background
With the recent emphasis on environmental protection, the demand for natural gas as a clean fossil fuel has been increasing year by year. According to the forecast of international energy agency, the total amount of the global available conventional natural gas exceeds 470 trillion m 3 However, these natural gases are mainly distributed in a few countries such as russia, iran, catal, etc. This makes the gas utilization area that the energy is scarce have certain geographical position's restriction between the gas production area that the energy is abundant, therefore, natural gas transportation becomes one of the key problems that need to solve. At present, the transportation modes such as land transportation, water transportation and pipeline transportation are mainly adopted, wherein the water transportation mainly comprises the steps of cooling gaseous natural gas under normal pressure to-162 ℃, reducing the volume to 1/625 of that of the gaseous natural gas, condensing the gaseous natural gas into liquid, and transporting the liquid through a Liquefied Natural Gas (LNG) transport ship, so that the storage space and the transportation cost can be saved.
Due to the special physical and chemical properties of LNG, LNG carriers have high requirements for various aspects of performance, and in order to achieve safe and efficient transportation, LNG carriers need to have absolute cryogenic reliability. At present, a plurality of supporting units are arranged between a liquid cargo tank body and a ship body of some new LNG transport ships, and the supporting units are generally of laminated wood structures compounded by epoxy resin and wood. However, the laminated wood is easy to crack when the external temperature changes in a cold and hot mode, the shear strength of the laminated wood, particularly the shear strength in the direction parallel to the laminated layer, is greatly influenced, and great potential safety hazards are brought to LNG transport ships.
Disclosure of Invention
In order to solve at least one technical problem, the invention provides a vibration reduction lamination block for an LNG transport ship and a preparation method thereof. The damping laminated block has good low-temperature resistance (the using temperature can reach-196 ℃), and has excellent shear resistance in the direction perpendicular to the laminated layer and also in the direction parallel to the laminated layer due to the special structural design; the low-temperature-resistant support unit can be used as a low-temperature-resistant support unit of a liquid cargo tank body of an LNG transport ship or other low-temperature-resistant and impact-resistant structural units.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a damping laminated block for an LNG transport ship, which comprises a plurality of layers of composite material laminated layers and tubular reinforcing ribs vertically inserted in the plurality of layers of composite material laminated layers;
the multilayer composite material laminated layer is formed by laminating low-temperature-resistant casting polyurethane and fiber cloth;
the tubular reinforcing rib is of a hollow tubular structure and is formed by winding low-temperature-resistant casting polyurethane and fiber cloth in a rotating mode.
According to the stress condition of the damping lamination block in the actual use process, the tubular reinforcing ribs are vertically inserted and reinforced, so that the shear strength in the direction parallel to the multilayer composite lamination layer is improved to the maximum extent on the premise that the compressive strength and the shear strength in the direction perpendicular to the multilayer composite lamination layer are not reduced or are reduced little.
According to the invention, a technology of compounding low-temperature-resistant pouring polyurethane and fiber cloth is adopted, the low-temperature resistance of the polyurethane is combined with the high strength and the high modulus of the fiber cloth, and the prepared damping laminated block has excellent low-temperature performance and excellent anti-shearing performance, and can meet the requirements of the use of a supporting unit structure of a liquid cargo tank body of an LNG transport ship in an ultralow-temperature environment and under complicated stress. Meanwhile, the vibration-damping laminated block has excellent shear resistance in the horizontal and vertical directions through the structural design of the horizontal multi-layer composite material laminated layer and the vertical tubular reinforcing ribs. The compression strength of the vibration-damping laminated block is more than 100MPa, the shear strength in the direction vertical to the multilayer composite material is more than 60MPa, the shear strength in the direction parallel to the multilayer composite material is more than 30MPa, and the use temperature can reach-196 ℃.
According to the vibration damping laminated block of the present invention, preferably, the multilayer composite laminated layer and the tubular reinforcing rib are bonded by low temperature resistant cast polyurethane.
According to the vibration damping laminate block of the present invention, preferably, the low temperature resistant casting polyurethane includes a component a and a component B;
the component A comprises the following raw materials: 20 to 50 parts by mass (more preferably 35 to 45 parts by mass) of a polyether polyol, and 70 to 120 parts by mass (more preferably 80 to 110 parts by mass) of a diisocyanate;
the component B comprises the following raw materials: 80 to 130 parts by mass (more preferably 90 to 110 parts by mass) of polyether polyol, 10 to 40 parts by mass (more preferably 20 to 25 parts by mass) of chain extender, 10 to 50 parts by mass (more preferably 25 to 35 parts by mass) of modified inorganic filler, and 0.5 to 3 parts by mass (more preferably 0.5 to 1.5 parts by mass) of catalyst.
According to the vibration damping laminated block of the present invention, preferably, the mass ratio of the a component to the B component is 0.52 to 1.2; more preferably 0.75 to 1.05.
According to the vibration damping laminate block of the present invention, preferably, the polyether polyol in the a component has a number average molecular weight (Mn) of 2000 to 3000.
According to the vibration damping laminate block of the present invention, preferably, the polyether polyol in the B component has a number average molecular weight of 650 to 3000.
The number average molecular weight of the polyether polyol is considered in consideration of the performance, the viscosity of A, B component and the reaction speed after mixing, and the viscosity of A, B component and the reaction speed after mixing influence the molding process. The invention discovers that the number average molecular weight (Mn) of the polyether polyol in the component A is 2000-3000, and the number average molecular weight of the polyether polyol in the component B is 650-3000.
According to the vibration damping laminate block of the present invention, preferably, the polyether polyols in the a-and B-components each include polytetrahydrofuran diol, branched polytetrahydrofuran diol PTG-L (wherein PTG-L is a commercial code number), and tetrahydrofuran-propylene oxide copolyether diol; more preferably, the polyether polyols in the a and B components are each composed of polytetrahydrofuran diol, branched polytetrahydrofuran diol PTG-L and tetrahydrofuran-propylene oxide copolyether diol.
According to the vibration damping laminate block of the present invention, preferably, the diisocyanate in the a component includes 2,4' -diphenylmethane diisocyanate in a mixture with 4,4' -diphenylmethane diisocyanate 1:1 (MDI-50) and carbodiimide-modified 4,4' -diphenylmethane diisocyanate. More preferably, the diisocyanates in the a component consist of 2,4' -diphenylmethane diisocyanate in admixture with 4,4' -diphenylmethane diisocyanate 1:1 (MDI-50) and carbodiimide modified 4,4' -diphenylmethane diisocyanate; the performance of the alloy can meet the use requirement and the processing technology.
According to the vibration damping laminate block of the present invention, preferably, the chain extender in the B component includes at least one of 1,4-butanediol and ethylene glycol.
According to the vibration damping laminate block of the present invention, preferably, the modified inorganic filler in the B component includes one or a combination of two or more of carbon black (e.g., carbon black 220), multiwalled carbon nanotubes, chopped carbon fibers 1 to 4mm long, and graphene oxide.
According to the vibration damping laminate block of the present invention, preferably, the catalyst in the B component includes at least one of an organobismuth catalyst DY20 and an organozinc catalyst DY 5350; more preferably, the catalyst in the component B consists of an organic bismuth catalyst DY20 and an organic zinc catalyst DY5350, and the two catalysts need to be used in a matched mode, so that the catalytic effect is optimal.
According to the vibration damping laminated block of the present invention, preferably, the fiber cloth is selected from at least one of glass fiber cloth, basalt fiber cloth and carbon fiber cloth, taking properties, price and molding process into consideration.
According to the vibration damping laminated block of the present invention, preferably, the weaving manner of the fiber cloth is a plain weave. The weaving modes of the common fiber cloth include plain weave, twill weave and satin weave, and the strength of the vibration reduction laminated block obtained by adopting the plain weave is optimal through the exploration of the invention.
According to the vibration damping laminated block of the present invention, preferably, the thickness of the fiber cloth is 0.3mm to 0.5mm.
According to the damping laminate block of the present invention, preferably, the number of fiber cloth layers laid flat by the multilayer composite material lamination layer per millimeter thickness is 0.5 to 3.
According to the damping laminated block, the volume ratio of the fiber cloth in the multilayer composite laminated layer is preferably 20-50%. The volume ratio of the fiber cloth is related to the strength of the laminated layer of the multilayer composite material, and the performance of the laminated layer of the multilayer composite material is poor when the fiber cloth is too much or too little.
According to the vibration damping laminate panel of the present invention, preferably, the density of the laminated layers of the multilayer composite material is 1.3g/cm 3 ～1.75g/cm 3 。
According to the damping lamination block, preferably, the mounting holes for inserting the tubular reinforcing ribs are uniformly distributed on the multi-layer composite material lamination layer; and the area of the mounting hole on the surface of the laminated layer of the multilayer composite material accounts for 30-60%. The intensities in the vertical direction and the parallel direction are comprehensively considered.
The area ratio of the mounting holes corresponds to the distribution density of the tubular reinforcing ribs. The invention comprehensively considers the strength in the vertical direction and the parallel direction, and preferably the area occupation ratio of the mounting holes is 30-60%.
According to the vibration damping lamination block, the hole diameter of the mounting hole is preferably 8.5 mm-25.5 mm. The aperture size of the mounting hole is adjusted to fit the actual size of the damping laminate block during use after the area ratio of the mounting hole is determined.
According to the damping lamination block, the number of the fiber cloth layers wound on the tubular reinforcing rib in a rotating mode in the radial direction per millimeter of thickness is preferably 0.5-3, and the specific number of the fiber cloth layers is required to be determined according to the size, the shape and the strength of the damping lamination block.
According to the damping laminate block of the present invention, preferably, the tubular reinforcing rib has an outer diameter of 8mm to 25mm; the inner diameter is 4 mm-15 mm.
According to the damping laminate block of the present invention, preferably, one or a combination of two or more of a pressure sensor, a strain sensor or a temperature sensor is disposed in the inner hole of the tubular reinforcing rib.
The invention also provides a preparation method of the vibration-damping laminated block, which comprises the following steps:
smearing the low-temperature-resistant casting polyurethane on the surface of the single-layer fiber cloth, and preparing a single-layer composite sheet through a pressing die;
smearing low-temperature-resistant casting polyurethane on the surfaces of two sides of the single-layer composite sheet, and then overlapping 10-50 layers in a pressing mould to prepare a multilayer composite material;
punching a mounting hole serving as the tubular reinforcing rib on the multilayer composite material;
smearing the low-temperature-resistant casting polyurethane on the surface of a single-layer fiber cloth, fixing one end of the fiber cloth on a cylindrical core mold, and rotating the core mold to uniformly wind the fiber cloth to an outer diameter equal to that of the tubular reinforcing rib; then putting the reinforcing rib into a forming die, and carrying out die pressing to prepare a tubular reinforcing rib;
and pressing a preset number of the multilayer composite materials with the mounting holes into a mould through low-temperature-resistant casting polyurethane, then smearing the low-temperature-resistant casting polyurethane on the outer surface of the tubular reinforcing rib, inserting the tubular reinforcing rib into the mounting holes, and then carrying out mould pressing to prepare the damping laminated block. The predetermined number is determined according to the size requirement of the damping laminated blocks in the actual use process, the damping laminated blocks used on the LNG ship have various sizes and shapes, and different molds are used for molding.
According to the preparation method of the present invention, preferably, the conditions of the press mold for preparing the monolayer composite sheet include: the thickness of the pressing mold is 0.32 mm-0.52 mm, the mold pressure is 10 MPa-20 MPa, the mold pressing temperature is 60-80 ℃, and the mold pressing time is 10 min-30 min.
According to the preparation method of the present invention, preferably, the conditions of the press mold for preparing the multilayer composite material include: the thickness of the pressing mould is 5 mm-20 mm, the mould pressure is 10 MPa-20 MPa, the mould pressing temperature is 60-80 ℃, and the mould pressing time is 20 min-60 min.
According to the production method of the present invention, preferably, the conditions for producing the tubular reinforcing bar by press molding include: the pressure is 10MPa to 20MPa, the mould pressing temperature is 60 ℃ to 80 ℃, and the mould pressing time is 30min to 60min.
According to the preparation method of the present invention, preferably, the conditions for preparing the vibration damping laminated block by the embossing include: the mould pressing pressure is 10MPa to 20MPa, the mould pressing temperature is 60 ℃ to 80 ℃, and the mould pressing time is 60min to 180min.
According to the manufacturing method of the present invention, preferably, the manufacturing method further includes, after the step of press-molding the vibration-damping laminate sheet: one or a combination of more than two of a pressure sensor, a strain sensor or a temperature sensor is arranged in the inner hole of the tubular reinforcing rib.
In yet another aspect, the present invention provides the use of the above-described vibration-damping laminate in a low temperature resistant support unit structure of a tank body of a liquid cargo tank of an LNG carrier. In addition, the damping laminate block of the present invention may also be used in other low temperature resistant impact resistant structures.
According to the damping lamination block, the low-temperature-resistant pouring polyurethane material is used as a base material to obtain excellent low-temperature resistance, the fiber cloth is used as a reinforcing material to obtain excellent anti-shearing performance, and the tubular reinforcing ribs are vertically inserted into the horizontal multi-layer composite material to ensure that the anti-shearing performance in the parallel direction and the anti-shearing performance in the vertical direction are both considered; and a pressure sensor, a strain sensor or a temperature sensor can be further arranged in the inner hole of the tubular reinforcing rib to realize real-time monitoring of the working state and the service life of the lamination block. The vibration reduction lamination block is applied to a low-temperature-resistant supporting unit structure of a liquid cargo tank body of an LNG transport ship, so that the reliability of the supporting unit can be greatly improved, and the reliability of the LNG transport ship can be further improved.
Drawings
FIG. 1 is a schematic view of the construction of a vibration damping laminate block of the present invention.
FIG. 2 is a schematic horizontal cross-section of a vibration damping laminate block of the present invention.
Description of reference numerals:
1-a multi-layer composite material laminated layer, 2-a tubular reinforcing rib and 3-an inner hole.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
In addition, some orientation words, such as "horizontal", "vertical", etc., mentioned in the embodiments of the present invention, are related to the placement of the multi-layer composite material, and should not be construed as limiting the scope of the present invention.
As shown in fig. 1 and 2, the vibration damping laminate block of the present invention comprises: the multi-layer composite material laminated layer 1 in the horizontal direction vertically penetrates and is connected with the tubular reinforcing ribs 2 in the multi-layer composite material laminated layer 1, and the penetrating connection parts of the multi-layer composite material laminated layer are preferably bonded through low-temperature-resistant casting polyurethane.
The tubular reinforcing rib 2 is of a hollow tubular structure and is provided with an inner hole 3, wherein at least one of a pressure sensor, a strain sensor or a temperature sensor can be further arranged to realize real-time monitoring of the working state and the service life of the lamination block.
The multilayer composite material laminating layer 1 is formed by laminating low-temperature-resistant casting polyurethane and fiber cloth; the tubular reinforcing rib 2 is formed by winding low-temperature-resistant casting polyurethane and fiber cloth in a rotating mode.
The materials used in the examples of the invention were as follows:
1) PTMEG2000: polytetrahydrofuran diol having a number average molecular weight of 2000;
2) PTMEG1000: polytetrahydrofuran diol having a number average molecular weight of 1000;
3) PTG-L2000: PTG-L, a branched polytetrahydrofuran diol having a number average molecular weight of 2000;
4) PTG-L3000: a branched polytetrahydrofurandiol PTG-L having a number average molecular weight of 3000;
5) PTPG2000: tetrahydrofuran-propylene oxide copolyether glycol having a number average molecular weight of 2000, prepared from tetrahydrofuran and propylene oxide;
6) MDI-50:2,4 '-diphenylmethane diisocyanate to 4,4' -diphenylmethane diisocyanate 1:1 mixture with an isocyanate content of 33.5%;
7) MDI100L: carbodiimide modified diphenylmethane diisocyanate, isocyanate content of which is 29 percent;
8) BDO:1,4-butanediol;
9) N220: carbon black 220;
10 CNT: a carbon nanotube;
11 CF): carbon fibers;
12 GO: graphene oxide;
13 DY 20): an organic bismuth catalyst DY20;
14 DY5350: organic zinc catalyst DY5350.
The parts in the examples of the present invention are parts by mass.
The density test standard reference DIN53420, the compressive strength test standard reference DIN53454, and the shear strength test standard reference DIN7707 in the vibration damping laminate block manufactured in the examples of the present invention.
Example 1
In the embodiment, a vibration damping laminated block is prepared, wherein the mass ratio of a component A to a component B in low-temperature-resistant casting polyurethane is 1:
the component A comprises: 5 parts of polyether polyol PTMEG, 15 parts of PTG-L and 20 parts of PTPG; diisocyanate MDI-50 parts, MDI100L 80 parts.
And B component: PTMEG1000 parts, PTG-L2000 20 parts, PTPG2000 30 parts, BDO 24 parts, N220 parts, CNT 5 parts, 1mm chopped CF 15 parts, DY 20.2 parts and DY 5350.8 parts.
In this embodiment, the fiber cloth in the multi-layer composite material laminated layer and the tubular reinforcing rib is glass fiber cloth, the weaving mode is plain weaving, and the thickness of the fiber cloth is 0.41mm.
In this example, the number of layers of fiber cloth laid flat per millimeter thickness in the multilayer composite lamination layer was 1.5, the volume percentage of the fiber cloth in the multilayer composite lamination layer was 29%, and the density of the multilayer composite lamination layer was 1.46g/cm 3 。
In this embodiment, the mounting holes of the tubular reinforcing ribs are uniformly distributed on the multi-layer composite material lamination layer, the area ratio of the mounting holes is 30%, and the aperture is 10.5mm.
In this embodiment, the number of layers of the fiber cloth wound by the tubular reinforcing rib in a rotating manner in the radial direction per millimeter of thickness is 2.
In this embodiment, the tubular reinforcing ribs have an outer diameter of 10mm and an inner diameter of 4mm.
The preparation method of the vibration damping laminated block of the embodiment comprises the following steps:
1) The low-temperature-resistant casting polyurethane A, B components are uniformly coated on the surface of the single-layer fiber cloth after being mixed in proportion, the thickness of a pressing mold is controlled to be 0.65mm, the mold pressing pressure is controlled to be 15MPa, the mold pressing temperature is controlled to be 75 ℃, and the mold pressing time is controlled to be 15min, so that the single-layer composite sheet is prepared.
2) Uniformly coating low-temperature-resistant casting polyurethane on the surfaces of two sides of the single-layer composite sheet, sequentially laminating 15 layers of the single-layer composite sheet into a pressing mold, wherein the thickness of the pressing mold is 10mm, the mold pressure is 20MPa, the mold pressing temperature is 75 ℃, and the mold pressing time is 30min, so that a multi-layer composite material pressing layer is prepared.
3) Mounting holes with the diameter of 10.5mm are uniformly punched on the laminated layers of the multilayer composite material according to requirements, and the area percentage of the mounting holes is 30%.
4) The method comprises the following steps of uniformly coating a mixture of low-temperature-resistant casting polyurethane A, B on the surface of single-layer fiber cloth, fixing one end of the fiber cloth coated with the low-temperature-resistant casting polyurethane on a cylindrical core mold, enabling the outer diameter of the core mold to be 4mm, rotating the core mold to uniformly wind the fiber cloth to the outer diameter of 10mm, putting the fiber cloth into a forming mold, performing mold pressing, and preparing the tubular reinforcing rib, wherein the mold pressing pressure is 15MPa, the mold pressing temperature is 75 ℃, and the mold pressing time is 30min.
5) And (2) laminating 50 multilayer composite material laminated layers with mounting holes into a mould through low-temperature-resistant casting polyurethane, uniformly coating the low-temperature-resistant casting polyurethane on the outer surface of the tubular reinforcing rib, inserting the tubular reinforcing rib into the mounting holes of the multilayer composite material laminated layers, fully inserting the tubular reinforcing rib into the mounting holes, and carrying out mould pressing at the mould pressing pressure of 20MPa, the mould pressing temperature of 80 ℃ and the mould pressing time of 120min to prepare the vibration-damping laminated layer block.
6) And a pressure sensor, a strain sensor and a temperature sensor are arranged in an inner hole of the tubular reinforcing rib in the vibration reduction lamination block.
The compression strength of the vibration reduction laminated block prepared in the embodiment reaches 201MPa; the shear strength of the laminated composite material in the direction vertical to the laminated layers of the multilayer composite material reaches 85MPa at the temperature of 20 ℃ and reaches 81.5MPa at the temperature of-196 ℃; the shear strength of the laminated composite material parallel to the direction of the laminated layers of the multilayer composite material reaches 51MPa at the temperature of 20 ℃ and reaches 50.5MPa at the temperature of-196 ℃; therefore, the use temperature can reach-196 ℃. Meanwhile, as the pressure sensor, the strain sensor and the temperature sensor are implanted into the vibration reduction lamination block, the functions of monitoring the working state and the service life of the vibration reduction lamination block in real time can be realized.
Example 2
In this embodiment, a damping laminated block is prepared, wherein the mass ratio of the component a and the component B in the low temperature resistant casting polyurethane is 0.91:
the component A comprises: 10 parts of polyether polyol PTMEG2000, 10 parts of PTG-L2000 and 20 parts of PTPG 2000; diisocyanate MDI-50 parts, MDI100L 80 parts.
And B component: PTMEG1000 parts, PTG-L2000 parts, PTPG2000 30 parts, BDO 21.3 parts, N220 10 parts, 1mm chopped CF 15 parts, GO 5 parts, DY 20.2 parts and DY 5350.8 parts.
In this embodiment, the fiber cloth in the multi-layer composite material laminated layer and the tubular reinforcing rib is glass fiber cloth, the weaving mode is plain weaving, and the thickness of the fiber cloth is 0.39mm.
In this embodiment, the number of fiber cloth layers laid flat per millimeter in the multilayer composite material lamination layer is 2, the volume percentage of the fiber cloth in the multilayer composite material lamination layer is 32%, and the density of the multilayer composite material lamination layer is 1.5g/cm 3 。
In this embodiment, the multi-layer composite material lamination layer is uniformly distributed with mounting holes of the tubular reinforcing ribs, the area ratio of the mounting holes is 35%, and the aperture is 15.5mm.
In this embodiment, the number of layers of the fiber cloth wound by the tubular reinforcing rib in a rotating manner in the radial direction per millimeter of thickness is 2.
In this embodiment, the tubular reinforcing rib has an outer diameter of 15mm and an inner diameter of 6mm.
The preparation method of the vibration damping laminated block of the embodiment comprises the following steps:
1) The low-temperature resistant casting polyurethane A, B components are uniformly coated on the surface of the single-layer fiber cloth after being mixed in proportion, the thickness of a pressing mold is controlled to be 0.48mm, the mold pressing pressure is controlled to be 15MPa, the mold pressing temperature is controlled to be 75 ℃, and the mold pressing time is controlled to be 15min, so that the single-layer composite sheet is prepared.
2) Uniformly smearing low-temperature-resistant casting polyurethane on the surfaces of two sides of the single-layer composite sheet, then sequentially laminating 20 layers of single-layer composite sheets into a pressing mold, wherein the thickness of the pressing mold is 10mm, the mold pressure is 20MPa, the mold pressing temperature is 75 ℃, and the mold pressing time is 30min, so that the multilayer polyurethane fiber composite board is prepared.
3) Mounting holes with the diameter of 15.5mm are uniformly punched on the laminated layers of the multilayer composite material according to the requirement, and the area percentage of the mounting holes is 35 percent.
4) The method comprises the following steps of uniformly coating a mixture of low-temperature-resistant casting polyurethane A, B on the surface of single-layer fiber cloth, fixing one end of the fiber cloth coated with the low-temperature-resistant casting polyurethane on a cylindrical core mold, enabling the outer diameter of the core mold to be 6mm, uniformly winding the fiber cloth to be 15mm by rotating the core mold, putting the fiber cloth into a forming mold, performing mold pressing, and preparing the tubular reinforcing rib, wherein the mold pressing pressure is 15MPa, the mold pressing temperature is 75 ℃, and the mold pressing time is 30min.
5) And (2) pressing 50 multilayer composite material pressing layers with mounting holes into a mould through low-temperature-resistant casting polyurethane, then uniformly smearing the low-temperature-resistant casting polyurethane on the outer surface of the tubular reinforcing rib, inserting the tubular reinforcing rib into the mounting holes of the multilayer composite material pressing layers, fully inserting the tubular reinforcing rib into the mounting holes, and carrying out mould pressing, wherein the mould pressing pressure is 20MPa, the mould pressing temperature is 80 ℃, and the mould pressing time is 120min, so that the damping laminated block is prepared.
6) And a pressure sensor, a strain sensor and a temperature sensor are arranged in an inner hole of the tubular reinforcing rib in the vibration reduction lamination block.
The compressive strength of the low-temperature-resistant polyurethane composite damping laminated block prepared in the embodiment reaches 205MPa; the shear strength of the laminated composite material in the direction vertical to the laminated layers of the multilayer composite material reaches 82MPa at the temperature of 20 ℃ and reaches 78.3MPa at the temperature of-196 ℃; the shear strength of the laminated composite material parallel to the direction of the laminated layers of the multilayer composite material reaches 63MPa at the temperature of 20 ℃ and reaches 61.7MPa at the temperature of-196 ℃; therefore, the use temperature can reach-196 ℃. Meanwhile, as the pressure sensor, the strain sensor and the temperature sensor are implanted into the vibration reduction laminated block, the functions of monitoring the working state and the service life of the vibration reduction laminated block in real time can be realized.
Example 3
In this embodiment, a damping laminated block is prepared, wherein the mass ratio of the component a to the component B in the low temperature resistant casting polyurethane is 0.79:
the component A comprises: 15 parts of polyether polyol PTMEG, 15 parts of PTG-L and 10 parts of PTPG; diisocyanate MDI-50 parts, MDI100L 80 parts.
And B component: PTMEG2000 parts, PTG-L3000 parts, PTPG2000 20 parts, BDO 20.5 parts, N220 parts, CNT 5 parts, 1mm short-cut CF 10 parts, GO 5 parts, DY 20.2 parts and DY 5350.8 parts.
In this embodiment, the fiber cloth in the laminated layers of the multilayer composite material and the tubular reinforcing ribs is basalt fiber cloth, the weaving mode is plain weaving, and the thickness of the fiber cloth is 0.41mm.
In this embodiment, the number of fiber cloth layers laid flat per millimeter in the multilayer composite material lamination layer is 1.5, the volume percentage of the fiber cloth in the multilayer composite material lamination layer is 31%, and the density of the multilayer composite material lamination layer is 1.48g/cm 3 。
In this embodiment, the mounting holes of the tubular reinforcing ribs are uniformly distributed on the multi-layer composite material lamination layer, the area ratio of the mounting holes is 45%, and the aperture is 20.5mm.
In this embodiment, the number of layers of the fiber cloth wound by the tubular reinforcing rib in a rotating manner in the radial direction per millimeter of thickness is 2.
In this embodiment, the tubular reinforcing rib has an outer diameter of 20mm and an inner diameter of 10mm.
The preparation method of the vibration damping laminated block of the embodiment comprises the following steps:
1) The low-temperature-resistant casting polyurethane A, B is uniformly coated on the surface of the single-layer fiber cloth after being mixed in proportion, the thickness of a pressing mold is controlled to be 0.65mm, the mold pressing pressure is controlled to be 15MPa, the mold pressing temperature is controlled to be 75 ℃, the mold pressing time is controlled to be 15min, and the single-layer composite sheet is prepared.
2) Uniformly smearing low-temperature-resistant casting polyurethane on the surfaces of two sides of the single-layer composite sheet, then sequentially laminating 15 layers of single-layer composite sheets into a pressing mold, wherein the thickness of the pressing mold is 10mm, the mold pressure is 20MPa, the mold pressing temperature is 75 ℃, and the mold pressing time is 30min, so that the multilayer polyurethane fiber composite board is prepared.
3) Mounting holes with the diameter of 20.5mm are uniformly punched on the laminated layers of the multilayer composite material according to requirements, and the area percentage of the mounting holes is 45%.
4) The method comprises the following steps of uniformly coating a mixture of low-temperature-resistant casting polyurethane A, B on the surface of single-layer fiber cloth, fixing one end of the fiber cloth coated with the low-temperature-resistant casting polyurethane on a cylindrical core mold, enabling the outer diameter of the core mold to be 10mm, rotating the core mold to uniformly wind the fiber cloth to the outer diameter of 20mm, putting the fiber cloth into a forming mold, performing mold pressing, and preparing the tubular reinforcing rib, wherein the mold pressing pressure is 15MPa, the mold pressing temperature is 75 ℃, and the mold pressing time is 30min.
5) And (2) pressing 50 multilayer composite material pressing layers with mounting holes into a mould through low-temperature-resistant casting polyurethane, then uniformly smearing the low-temperature-resistant casting polyurethane on the outer surface of the tubular reinforcing rib, inserting the tubular reinforcing rib into the mounting holes of the multilayer composite material pressing layers, fully inserting the tubular reinforcing rib into the mounting holes, and carrying out mould pressing, wherein the mould pressing pressure is 20MPa, the mould pressing temperature is 80 ℃, and the mould pressing time is 120min, so that the damping laminated block is prepared.
6) And a pressure sensor, a strain sensor and a temperature sensor are arranged in an inner hole of the tubular reinforcing rib in the vibration reduction lamination block.
The low-temperature resistant polyurethane composite damping laminated block prepared in the embodiment has the compressive strength of 195MPa; the shear strength of the laminated composite material in the direction vertical to the laminated layer of the multilayer composite material reaches 78MPa at 20 ℃ and reaches 75.4MPa at-196 ℃; the shear strength of the laminated composite material parallel to the direction of the laminated layers of the multilayer composite material reaches 68MPa at the temperature of 20 ℃ and reaches 66.7MPa at the temperature of-196 ℃; therefore, the use temperature can reach-196 ℃. Meanwhile, as the pressure sensor, the strain sensor and the temperature sensor are implanted into the vibration reduction lamination block, the functions of monitoring the working state and the service life of the vibration reduction lamination block in real time can be realized.
Example 4
In this embodiment, a damping laminated block is prepared, wherein the mass ratio of the component a and the component B in the low temperature resistant casting polyurethane is 0.85:
the component A comprises: 15 parts of polyether polyol PTMEG2000, 15 parts of PTG-L2000 and 10 parts of PTPG 2000; diisocyanate MDI-50 parts, MDI100L 80 parts.
And B component: PTMEG1000 parts, PTG-L2000 20 parts, PTPG2000 30 parts, BDO 20.5 parts, N220 parts, CNT 5 parts, 1mm chopped CF 10 parts, GO 5 parts, DY 20.2 parts and DY 5350.8 parts.
In this embodiment, the fiber cloth in the laminated layer of the multilayer composite material is basalt fiber cloth, the weaving manner is plain weaving, and the thickness of the fiber cloth is 0.39mm.
In this embodiment, the number of fiber cloth layers laid flat per millimeter in the multilayer composite material lamination layer is 2, the volume percentage of the fiber cloth in the multilayer composite material lamination layer is 35%, and the density of the multilayer composite material lamination layer is 1.54g/cm 3 。
In this embodiment, the multi-layer composite material lamination layer is uniformly distributed with mounting holes of the tubular reinforcing ribs, the area ratio of the mounting holes is 40%, and the aperture is 24.5mm.
In this embodiment, the number of layers of fiber cloth that the tubular reinforcing rib is rotationally wound in the radial direction per millimeter of thickness is 2.
In this embodiment, the tubular reinforcing rib has an outer diameter of 24mm and an inner diameter of 10mm.
The preparation method of the vibration damping laminated block of the embodiment comprises the following steps:
1) The low-temperature resistant casting polyurethane A, B components are uniformly coated on the surface of the single-layer fiber cloth after being mixed in proportion, the thickness of a pressing mold is controlled to be 0.48mm, the mold pressing pressure is controlled to be 15MPa, the mold pressing temperature is controlled to be 75 ℃, and the mold pressing time is controlled to be 15min, so that the single-layer composite sheet is prepared.
2) Uniformly smearing low-temperature-resistant casting polyurethane on the surfaces of two sides of the single-layer composite sheet, then sequentially laminating 20 layers of sheets into a pressing mold, sequentially laminating the single-layer composite sheet into the pressing mold, wherein the thickness of the pressing mold is 10mm, the mold pressure is 20MPa, the mold pressing temperature is 75 ℃, and the mold pressing time is 30min, so that the multilayer polyurethane fiber composite sheet is prepared.
3) Mounting holes with the diameter of 24.5mm are uniformly punched on the laminated layers of the multilayer composite material according to the requirement, and the area percentage of the mounting holes is 40 percent.
4) The method comprises the following steps of uniformly coating a mixture of low-temperature-resistant casting polyurethane A, B on the surface of single-layer fiber cloth, fixing one end of the fiber cloth coated with the low-temperature-resistant casting polyurethane on a cylindrical core mold, enabling the outer diameter of the core mold to be 10mm, rotating the core mold to uniformly wind the fiber cloth to the outer diameter of 24mm, putting the fiber cloth into a forming mold, performing mold pressing, and preparing the tubular reinforcing rib, wherein the mold pressing pressure is 15MPa, the mold pressing temperature is 75 ℃, and the mold pressing time is 30min.
5) And (2) pressing 50 multilayer composite material pressing layers with mounting holes into a mould through low-temperature-resistant casting polyurethane, then uniformly smearing the low-temperature-resistant casting polyurethane on the outer surface of the tubular reinforcing rib, inserting the tubular reinforcing rib into the mounting holes of the multilayer composite material pressing layers, fully inserting the tubular reinforcing rib into the mounting holes, and carrying out mould pressing, wherein the mould pressing pressure is 20MPa, the mould pressing temperature is 80 ℃, and the mould pressing time is 120min, so that the damping laminated block is prepared.
6) And a pressure sensor, a strain sensor and a temperature sensor are arranged in an inner hole of the tubular reinforcing rib in the vibration reduction lamination block.
The low-temperature-resistant polyurethane composite damping laminated block prepared in the embodiment has the compressive strength of 208MPa; the shear strength of the laminated composite material in the direction vertical to the laminated layers of the multilayer composite material reaches 80MPa at the temperature of 20 ℃ and reaches 77.2MPa at the temperature of-196 ℃; the shear strength of the laminated composite material parallel to the direction of the laminated layers of the multilayer composite material reaches 71MPa at the temperature of 20 ℃ and reaches 68.3MPa at the temperature of-196 ℃; therefore, the use temperature can reach-196 ℃. Meanwhile, as the pressure sensor, the strain sensor and the temperature sensor are implanted into the vibration reduction lamination block, the functions of monitoring the working state and the service life of the vibration reduction lamination block in real time can be realized.
Comparative example 1
The formula of the low-temperature-resistant casting polyurethane in example 1 is changed into the following scheme:
the mass ratio of the component A to the component B is 0.5, and the components A and B respectively have the following formulas:
the component A comprises: 5 parts of polyether polyol PTMEG, 15 parts of PTG-L and 20 parts of PTPG; diisocyanate MDI-50 parts, MDI100L 80 parts.
And B component: PTMEG1000 parts, PTG-L2000 20 parts, PTPG2000 30 parts, BDO 6.5 parts, N220 parts, CNT 5 parts, 1mm chopped CF 15 parts, DY 20.2 parts and DY 5350.8 parts.
The rest of the manufacturing method and the process are the same as those of the embodiment 1.
The compression strength of the damping laminate block prepared in this comparative example was only 105MPa; the shear strength of the laminated composite material in the direction vertical to the laminated layers of the multilayer composite material is only 61MPa at the temperature of 20 ℃ and is only 58.4MPa at the temperature of-196 ℃; the shear strength of the laminated composite material parallel to the laminated layer direction is only 39.3MPa at 20 ℃ and only 38.2MPa at 196 ℃. The performance was much degraded compared to example 1.
Comparative example 2
The formula of the low-temperature-resistant casting polyurethane in example 2 is changed into the following scheme:
the mass ratio of the component A to the component B is 0.5, and the components A and B respectively have the following formulas:
the component A comprises: 10 parts of polyether polyol PTMEG2000, 10 parts of PTG-L2000 and 20 parts of PTPG 2000; diisocyanate MDI-50 parts, MDI100L 80 parts.
And B component: PTMEG1000 parts, PTG-L2000 20 parts, PTPG2000 30 parts, BDO 6 parts, N220 parts, 1mm chopped CF 9 parts, GO 2 parts, DY 20.2 parts and DY 5350.8 parts.
The rest of the manufacturing method and the process are the same as those of the embodiment 2.
The compressive strength of the low-temperature-resistant polyurethane composite damping laminated block prepared in the comparative example is only 108MPa; the shear strength of the laminated composite material in the direction vertical to the laminated layer of the multilayer composite material reaches 63.2MPa at the temperature of 20 ℃ and reaches 61.5MPa at the temperature of-196 ℃; the shear strength of the laminated composite material in the direction parallel to the laminated layers of the multilayer composite material reaches 51MPa at the temperature of 20 ℃ and reaches 49.4MPa at the temperature of 196 ℃ below zero. The performance was much degraded compared to example 2.
Comparative example 3
The formula of the low-temperature-resistant casting polyurethane in example 3 is changed into the following scheme:
the mass ratio of the component A to the component B is 1.25, and the components A and B respectively have the following formulas:
the component A comprises: 15 parts of polyether polyol PTMEG, 15 parts of PTG-L and 10 parts of PTPG; diisocyanate MDI-50 parts, MDI100L 80 parts.
And the component B comprises: PTMEG2000 parts, PTG-L3000 parts, PTPG2000 20 parts, BDO 39.5 parts, N220 parts, CNT 5 parts, 1mm short-cut CF 10 parts, GO 5 parts, DY 20.2 parts and DY 5350.8 parts.
The rest of the manufacturing method and process are the same as those of example 3.
The compression strength of the low-temperature-resistant polyurethane composite damping laminated block prepared in the comparative example reaches 203MPa; the shear strength of the laminated composite material in the direction vertical to the laminated layer of the multilayer composite material reaches 83MPa at 20 ℃ and is only 37MPa at-196 ℃; the shear strength of the laminated composite material in the direction parallel to the laminated layers of the multilayer composite material reaches 72MPa at the temperature of 20 ℃ and is only 41MPa at the temperature of-196 ℃; the shear strength at-196 ℃ decreased more than that of example 3.
Comparative example 4
The formula of the low-temperature-resistant casting polyurethane in the example 4 is changed into the following scheme:
the mass ratio of the component A to the component B is 1.25, and the formula of the component A to the formula of the component B are respectively as follows:
the component A comprises: 15 parts of polyether polyol PTMEG2000, 15 parts of PTG-L2000 and 10 parts of PTPG 2000; diisocyanate MDI-50 parts, MDI100L 80 parts.
And B component: PTMEG1000 parts, PTG-L2000 20 parts, PTPG2000 30 parts, BDO 41.5 parts, N220 parts, CNT 15 parts, 1mm chopped CF 10 parts, GO 4 parts, DY 20.2 parts and DY 5350.8 parts.
The rest of the manufacturing method and process are the same as those of example 4.
The compressive strength of the low-temperature-resistant polyurethane composite damping laminated block prepared in the comparative example reaches 215MPa; the shear strength of the laminated composite material in the direction vertical to the laminated layer of the multilayer composite material reaches 83.5MPa at the temperature of 20 ℃ and is only 42.8MPa at the temperature of-196 ℃; the shear strength of the laminated composite material in the direction parallel to the laminated layer of the multilayer composite material reaches 78MPa at the temperature of 20 ℃ and is only 44.7MPa at the temperature of-196 ℃; the shear strength at-196 ℃ decreased more than that of example 4.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (27)
1. A vibration damping laminated block for an LNG transport ship is characterized by comprising a plurality of laminated layers of composite materials and tubular reinforcing ribs vertically penetrating through the laminated layers of composite materials;
the multilayer composite material laminated layer is formed by laminating low-temperature-resistant casting polyurethane and fiber cloth; the number of fiber cloth layers laid on each millimeter of thickness of the multilayer composite material laminated layer is 0.5 to 3;
the tubular reinforcing rib is of a hollow tubular structure and is formed by rotationally winding low-temperature-resistant casting polyurethane and fiber cloth.
2. The vibration damping laminate tile as claimed in claim 1, wherein the multi-layer composite laminate layer is bonded to the tubular stiffener by low temperature resistant cast polyurethane.
3. The vibration damping laminate block according to claim 1 or 2, wherein the low temperature resistant casting polyurethane comprises an a-component and a B-component;
the component A comprises the following raw materials: 20-50 parts by mass of polyether polyol and 70-120 parts by mass of diisocyanate;
the component B comprises the following raw materials: 80-130 parts of polyether polyol, 10-40 parts of a chain extender, 10-50 parts of a modified inorganic filler and 0.5-3 parts of a catalyst.
4. The vibration damping laminate according to claim 3, wherein the mass ratio of the A component to the B component is 0.52 to 1.2.
5. The vibration damping laminate as claimed in claim 3, wherein the polyether polyol in the A-component has a number average molecular weight of 2000 to 3000.
6. The vibration damping laminate as claimed in claim 3, wherein the polyether polyol in the B component has a number average molecular weight of 650 to 3000.
7. The vibration damping laminate block according to claim 3, wherein the polyether polyols of both the A and B components comprise polytetrahydrofuran diol, branched polytetrahydrofuran diol PTG-L, and tetrahydrofuran-oxypropylene copolyether diol.
8. The vibration damping laminate tile according to claim 3, wherein the diisocyanate in the A component comprises 2,4' -diphenylmethane diisocyanate in admixture with 4,4' -diphenylmethane diisocyanate 1:1 and carbodiimide modified 4,4' -diphenylmethane diisocyanate.
9. The vibration damping laminate block according to claim 3, wherein the chain extender in the B component comprises at least one of 1,4-butanediol and ethylene glycol.
10. The vibration damping laminate tile as claimed in claim 3, wherein the modified inorganic filler in the B component comprises one or a combination of two or more of carbon black, multi-walled carbon nanotubes, chopped carbon fibers 1 to 4mm long, and graphene oxide.
11. The vibration damping laminate block of claim 3, wherein the catalyst in the B component comprises at least one of an organobismuth catalyst DY20 and an organozinc catalyst DY5350.
12. The vibration damping laminate block according to claim 1, wherein the fiber cloth is selected from at least one of a glass fiber cloth, a basalt fiber cloth, and a carbon fiber cloth.
13. The vibration damping laminate block according to claim 12, wherein the weaving manner of the fiber cloth is a plain weave.
14. The vibration damping laminate block according to claim 12, wherein the fiber cloth has a thickness of 0.3mm to 0.5mm.
15. The vibration damping laminate block according to claim 1, wherein the fiber cloth in the multilayer composite laminate layer is 20% to 50% by volume.
16. The vibration damping laminate tile of claim 1, wherein the multilayer composite laminate layer has a density of 1.3g/cm 3 ~ 1.75 g/cm 3 。
17. The vibration damping laminate tile as claimed in claim 1, wherein the multilayer composite laminate layer has mounting holes uniformly distributed therein for inserting the tubular reinforcing ribs; and the area of the mounting holes accounts for 30% -60% of the surface of the laminated layer of the multilayer composite material.
18. The vibration damping laminate block according to claim 17, wherein the mounting hole has an aperture of 8.5mm to 25.5mm.
19. The vibration damping laminate block as claimed in claim 1, wherein the number of layers of fiber cloth wound around the tubular reinforcing rib in a rotating manner in the radial direction per millimeter of thickness is 0.5 to 3.
20. The vibration damping laminate block according to claim 1, wherein the tubular reinforcing ribs have an outer diameter of 8mm to 25mm and an inner diameter of 4mm to 15mm.
21. The vibration damping laminate block according to claim 1, wherein one or a combination of two or more of a pressure sensor, a strain sensor, or a temperature sensor is disposed in an inner bore of the tubular stiffener.
22. A method of making a vibration damping laminate tile according to any one of claims 1-21, comprising the steps of:
smearing the low-temperature-resistant casting polyurethane on the surface of the single-layer fiber cloth, and preparing a single-layer composite material sheet through a pressing mold;
smearing low-temperature-resistant casting polyurethane on the surfaces of two sides of the single-layer composite material sheet, and then overlapping 10-50 layers in a pressing mould to prepare a multi-layer composite material pressing layer;
punching a mounting hole serving as the tubular reinforcing rib on the multi-layer composite material laminated layer;
smearing the low-temperature-resistant casting polyurethane on the surface of the single-layer fiber cloth, fixing one end of the low-temperature-resistant casting polyurethane on a cylindrical core mold, and rotating the core mold to uniformly wind the fiber cloth until the outer diameter of the fiber cloth is equal to that of the tubular reinforcing rib; then putting the reinforcing rib into a forming die, and carrying out die pressing to prepare a tubular reinforcing rib;
and pressing a preset number of the multilayer composite material pressing layers with the mounting holes into a mould through low-temperature-resistant casting polyurethane, then smearing the low-temperature-resistant casting polyurethane on the outer surface of the tubular reinforcing rib, inserting the tubular reinforcing rib into the mounting holes, and then carrying out mould pressing to prepare the damping laminating block.
23. The method according to claim 22, wherein the conditions for preparing the single-layer composite sheet by the press mold include: the thickness of the pressing mold is 0.32 mm-0.52 mm, the mold pressing pressure is 10 MPa-20 MPa, the mold pressing temperature is 60-80 ℃, and the mold pressing time is 10 min-30 min.
24. The method of claim 22, wherein the conditions of the press mold for preparing the multi-layer composite material include: the thickness of the pressing mold is 5 mm-20 mm, the mold pressing pressure is 10 MPa-20 MPa, the mold pressing temperature is 60-80 ℃, and the mold pressing time is 20-60 min.
25. The method of claim 22, wherein the conditions for forming the tubular reinforcing bar by die pressing include: the pressure is 10MPa to 20MPa, the mould pressing temperature is 60 to 80 ℃, and the mould pressing time is 30min to 60min.
26. The method of claim 22, wherein the conditions for embossing the vibration damping laminate panel include: the mould pressing pressure is 10 MPa-20 MPa, the mould pressing temperature is 60-80 ℃, and the mould pressing time is 60-180 min.
27. The method of manufacturing as claimed in claim 22, further comprising, after the step of embossing the vibration damping laminate sheet, the step of: one or a combination of more than two of a pressure sensor, a strain sensor or a temperature sensor is arranged in the inner hole of the tubular reinforcing rib.
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| CN104847026B (en) * | 2015-06-03 | 2017-04-19 | 哈尔滨工业大学（威海） | Basalt fiber cloth enhanced polyurethane hard foam composite heat-insulating board and manufacturing method thereof |
| CN104913185B (en) * | 2015-06-19 | 2017-03-15 | 沈阳中复科金压力容器有限公司 | Basalt fibre and carbon fiber hybrid composite compressed natural gas cylinder and preparation |
| CN110065287A (en) * | 2019-05-27 | 2019-07-30 | 重庆理工大学 | A kind of bubble core phase transformation sandwich structure composite material and preparation method thereof |
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