CN117005995B - A method for manufacturing an assembled toughness defense jacket offshore wind turbine - Google Patents
A method for manufacturing an assembled toughness defense jacket offshore wind turbine Download PDFInfo
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- CN117005995B CN117005995B CN202311182353.3A CN202311182353A CN117005995B CN 117005995 B CN117005995 B CN 117005995B CN 202311182353 A CN202311182353 A CN 202311182353A CN 117005995 B CN117005995 B CN 117005995B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 230000007123 defense Effects 0.000 title claims abstract description 7
- 238000000034 method Methods 0.000 title claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 105
- 239000010959 steel Substances 0.000 claims description 105
- 239000004567 concrete Substances 0.000 claims description 30
- 239000011229 interlayer Substances 0.000 claims description 17
- 238000010276 construction Methods 0.000 claims description 7
- 230000007797 corrosion Effects 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 230000000452 restraining effect Effects 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims 25
- 239000011210 fiber-reinforced concrete Substances 0.000 claims 1
- 239000011376 self-consolidating concrete Substances 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 230000009471 action Effects 0.000 abstract description 6
- 230000035939 shock Effects 0.000 abstract description 6
- 230000004888 barrier function Effects 0.000 abstract 1
- 230000005284 excitation Effects 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000001965 increasing effect Effects 0.000 description 5
- 230000008439 repair process Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
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- 238000013016 damping Methods 0.000 description 1
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- 239000003973 paint Substances 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 210000001226 toe joint Anatomy 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses an assembled flexible defending jacket offshore wind turbine and a manufacturing method thereof, wherein the assembled flexible defending jacket offshore wind turbine comprises a jacket foundation, a tower barrel and a wind turbine; the tower barrel is arranged at the top of the jacket foundation, and the fan is arranged at the top of the tower barrel through a base; the jacket foundation comprises a plurality of conduit legs, inclined struts, a core tube and a viscous damper; according to the invention, the core tube is additionally arranged, so that the integral rigidity of the structure is improved, and the diameters of the surrounding guide tube legs are reduced, so that the ice force born by the ocean platform is directly reduced, and the ice shock excitation resistance of the offshore wind turbine is improved; reducing ice-shock vibration of the structure through a viscous damper; the damage of the structure under the action of ice load and earthquake load is controlled through a self-resetting system and a replaceable yieldable energy consumption slotting component, and meanwhile, the self-resetting of the structure is realized, and the function restorable requirement is met; meanwhile, the truss and the core tube enable the offshore wind turbine to form a plurality of defense barriers, and the safety reserve of the structure is improved.
Description
Technical Field
The invention relates to the technical field of ocean platforms, in particular to a manufacturing method of an assembled flexible defending jacket offshore wind turbine.
Background
Offshore wind turbines are important facilities for offshore wind energy development, and mainly face two problems in the design, construction and service processes: sea ice disaster problems and seismic disaster problems. Sea ice is the main control load of the Bohai sea shallow sea ocean platform. Meanwhile, the seismic activity of the Bohai sea area is the highest area in the sea area of China, and the activity intensity and frequency of the seismic activity are far higher than those of other sea areas. The marginal shallow sea platform structure has the advantages of low steel consumption, low structural rigidity and low capability of resisting alternating ocean environmental load. Taking Bohai as an example, the water depths of Bohai and Alaska bay in the United states are basically the same, but the design steel amount of the Bohai ice-resistant platform is only close to one tenth of that of the Alaska bay ice-resistant platform in the United states. Therefore, the shallow sea ice-resistant platforms have the defects of low rigidity, poor ice load resistance and weak shock resistance. The disadvantages of the jacket-based offshore wind turbine are as follows:
1) Because the conduit legs of the offshore wind turbine with the jacket foundation need quite large rigidity to bear the whole structure, additional vibration load and the like, the conduit legs need larger pipe diameter, the steel consumption is increased, the process cost is high, and the transportation problem caused by the oversized diameter is remarkable; meanwhile, the contact area of sea ice is increased due to the increase of the pipe diameter, the ice load is increased, and the structure is adversely affected.
2) The existing jacket foundation offshore wind turbine jacket nodes are welded, the assembly is not detachable, the underwater welding workload is greatly increased, follow-up maintenance is inconvenient, and the manpower, material resources and financial resources are greatly wasted when residual stress damages the structural safety.
3) The scale and weight of the jacket offshore wind turbine increase rapidly with increasing water depth, so that the economy in deep water is poor. Meanwhile, the guide tube legs of the jacket offshore wind turbine are common steel tubes, so that the deformation resistance is poor, and once unrecoverable damage occurs, the column feet are not replaceable, and the whole guide tube legs are difficult to repair, so that the engineering is very tragic loss.
4) The vibration reaction of the structure of the jacket offshore wind turbine is very intense under the action of dynamic loads of marine environments such as wind, waves, currents, ice, earthquakes and the like. Under the action of earthquake load and impact load, the self-resetting capability of the offshore wind turbine is poor, and how to improve the vibration resistance and the self-resetting capability of the offshore wind turbine is a problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a manufacturing method of an assembled flexible defending jacket offshore wind turbine, which solves the problems of the prior art, has high rigidity, strong self-resetting capability and relatively light weight, is suitable for middle-shallow or even deep sea areas, can effectively reduce the vibration reaction of a structure under the non-artificial actions of wind, wave, flow, ice and the like, and ship impact and the like, improves the anti-seismic performance, the anti-impact performance and the anti-ice performance, is convenient to install, effectively reduces high cost generated by maintenance and repair, and prolongs the service life of an ocean platform.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides an assembled flexible defending jacket offshore wind turbine, which comprises a jacket foundation, a tower barrel and a wind turbine; the tower barrel is arranged at the top of the jacket foundation, and the fan is arranged at the top of the tower barrel through a base;
the jacket foundation comprises a plurality of conduit legs, inclined struts, a core tube and a viscous damper; the plurality of conduit legs are circumferentially arranged at intervals at the bottom of the fan platform, the top platform of each conduit leg is connected with the tower barrel through a bolt, the bottom is fixed on the sea bottom through a steel pile, a plurality of diagonal braces are connected between two adjacent conduit legs, the diagonal braces are connected with the conduit legs through bolts, the core barrel is arranged between the plurality of conduit legs and is positioned at the center of the bottom of the tower barrel, and the core barrel is connected with the conduit legs through bolts;
the guide pipe leg comprises an inner steel pipe and an outer steel pipe along the radial direction, a concrete interlayer I filled with concrete is arranged between the inner steel pipe and the outer steel pipe, a prestressed steel cable is arranged in the concrete interlayer I, the top of the prestressed steel cable is anchored on the top platform of the jacket foundation, and the bottom of the prestressed steel cable is fixedly connected with the submarine pile foundation;
the catheter leg comprises a catheter leg upper column and a catheter leg lower column along the length direction, a catheter leg upper column end plate is arranged at the bottom of the catheter leg upper column, a catheter leg lower column end plate is arranged at the top and the bottom of the catheter leg lower column respectively, the catheter leg upper column end plate and the catheter leg lower column end plate at the top of the catheter leg lower column are connected through high-strength bolts, and a replaceable energy consumption assembly is connected between the two catheter leg lower column end plates of the catheter leg lower column.
Preferably, a plurality of nodes are arranged on the same conduit leg, the upper conduit leg and the lower conduit leg at the nodes are connected through a flange, rib plates I are welded on the upper conduit leg and the lower conduit leg at the nodes, and the diagonal bracing is fixed on the rib plates I through corrosion-resistant bolts.
The pipe leg is provided with a plurality of nodes, the pipe leg at the nodes is of an integral through-length structure, and the diagonal bracing is fixed on the pipe leg through a pipe buckle.
Preferably, the top of the core tube is welded with the upper platform of the jacket foundation, and the bottom of the core tube is fixedly connected with the seabed through a steel pile.
Preferably, the core tube comprises an inner steel tube and an outer steel tube, and a concrete interlayer II filled with concrete is arranged between the inner steel tube and the outer steel tube.
Preferably, two ends of the viscous damper are respectively connected with the core tube and the welding rib plates on the catheter legs through high-strength bolts.
Preferably, the replaceable energy consumption component comprises a constraint cover plate, a filling plate and a slotted steel plate, wherein the slotted steel plate is connected between the upper column end plate of the guide tube leg and the lower column end plate of the guide tube leg, one or more slotted steel plates are arranged along the periphery of the lower column of the guide tube leg, the top and the bottom of the slotted steel plate are respectively connected with the upper column end plate of the guide tube leg and the lower column end plate of the guide tube leg through bolts, the constraint cover plate is connected to the outer side of the slotted steel plate through bolts, and the filling plate is filled in two sides or the slots of the slotted steel plate.
Preferably, the base is mounted to the top of the fan platform by bolts.
Based on the fabricated toughness defending jacket offshore wind turbine, the invention also provides a manufacturing method of the fabricated toughness defending jacket offshore wind turbine, which comprises the following steps:
1) And (3) forming a core tube: the inner steel tube and the outer steel tube forming the core tube are prefabricated and processed in a factory, and the interlayer concrete between the inner steel tube and the outer steel tube is also prefabricated and processed in the factory;
2) And (3) forming a jacket foundation: the inner steel tube and the outer steel tube forming the conduit leg are prefabricated and processed in a factory, and the interlayer concrete between the inner steel tube and the outer steel tube is also prefabricated and processed in the factory, and a prestressed pipeline is required to be reserved in the interlayer concrete. After the conduit leg and the jacket foundation are molded, the diagonal bracing and the conduit leg are connected through the high-strength bolt and the reserved bolt hole, wherein the tower barrel is connected to the upper part of the jacket foundation through the flange. After the jacket foundation and the core tube are installed, installing an anti-buckling support to form a structure;
3) Assembling the offshore wind turbine: after the prefabrication of the factory is completed, the structure is transported to an offshore construction site through lightering or floating, steel piles and jacket foundations are driven into the seabed after being in place, and steel guys are fixed on the seabed; grouting and tensioning prestress after leveling the jacket foundation; after tensioning is completed, the slotted steel plate is fixed between two end plates of the lower column of the guide pipe leg through bolts; thereby the lower part of the fan platform is fixed and molded;
4) And (3) installing a fan: and (3) hanging the fan structure prefabricated and formed in engineering through a crane for positioning and mounting.
Compared with the prior art, the invention has the following beneficial technical effects:
1. according to the manufacturing method of the fabricated toughness defending jacket offshore wind turbine, the reinforced concrete core tube is arranged at the center of the jacket foundation, so that the rigidity of the whole structure is effectively improved, the pipe diameter of the jacket around can be reduced, steel is saved, construction cost is saved, meanwhile, ice load can be reduced, and the anti-ice-shock vibration capability of the jacket structure is improved.
2. According to the manufacturing method of the assembled toughness defending jacket offshore wind turbine, provided by the invention, under the action of the transverse loads such as ice load or earthquake, the damper absorbs and consumes the impact energy of the transverse loads to the structure to the maximum extent, so that the impact and damage of the transverse loads such as ice load or earthquake to the structure are greatly relieved, and the manufacturing method is a first defense line of the assembled toughness defending jacket offshore wind turbine.
3. According to the manufacturing method of the fabricated flexible defending jacket offshore wind turbine, the prestressed steel inhaul cable is arranged in the interlayer concrete of the conduit leg, the application of the prestress can improve the integral ice shock vibration resistance of the structure, good restoring force can be provided for the structure, the self-resetting capability of the offshore wind turbine is improved, and the fabricated flexible defending jacket offshore wind turbine is a second defending line.
4. According to the manufacturing method of the assembled toughness defending jacket offshore wind turbine, provided by the invention, the damage of the column foot nodes is concentrated in the replaceable yielding energy consumption slotting component, the rapid recovery of the column foot functions can be realized after the earthquake, and the manufacturing method is a third defending line of the offshore wind turbine. The column foot node adopting the replaceable yieldable energy consumption slotting component has the capability of replacement and self-resetting, and can basically realize the mechanism of 'medium earthquake is not damaged, large earthquake is replaceable and huge earthquake is not fallen'.
5. The assembled type toughness defending jacket offshore wind turbine provided by the invention has the advantages that the jacket foundation adopts an assembled type, the traditional underwater welding mode is replaced, most of components can be detached and replaced, subsequent maintenance and repair are convenient, damaged components after disaster can be replaced, and post-disaster repair work is convenient, so that the engineering life is prolonged.
6. The assembled toughness defending jacket offshore wind turbine provided by the invention has the advantages that the jacket foundation adopts the truss-core tube-cantilever jacket foundation structure form, the structural rigidity is high, the height of the offshore wind turbine tower can be improved, and the assembled toughness defending jacket offshore wind turbine contributes to further developing domestic wind power resources.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an assembled flexible defensive jacket offshore wind turbine in accordance with the present invention;
FIG. 2 is a cross-sectional view of a catheter leg of the present invention;
FIG. 3 is a schematic view of the construction of the first embodiment of the present invention at the catheter leg node;
FIG. 4 is a schematic view of a second embodiment of the present invention at a catheter leg node;
FIG. 5 is a schematic illustration of a pipe buckle in a second embodiment of the present invention;
FIG. 6 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 7 is an assembly view of a viscous damper of the present invention;
FIG. 8 is an assembly view of the slotted steel plate and the column foot flange plate and the seabed pile foundation of the invention;
FIG. 9 is a longitudinal cross-sectional view of FIG. 8;
FIG. 10 is a schematic diagram of a replaceable energy consuming assembly;
FIG. 11 is a C-C sectional view of FIG. 8;
in the figure: 1. a blower; 2. a jacket foundation; 3. a catheter leg; 4. diagonal bracing; 5. a tower; 6. a core tube; 7. a viscous damper; 8. a node; 9. replaceable energy consuming components; 10. a pipe buckle; 31. an inner steel pipe; 32. an outer steel pipe; 33. a concrete interlayer I; 34. a prestressed duct; 35. prestress steel inhaul cable; 36. rib plate I; 37. a flange plate; 38. a conduit leg upper post end plate; 39. a conduit leg lower post end plate; 310. the catheter leg is provided with a column; 311. a catheter leg lower column; 41. a corrosion-resistant bolt; 42. rib plates II; 43. a high-strength bolt; 61. an outer steel cylinder; 62. a concrete interlayer II; 63. an inner steel cylinder; 71. rib plates III; 91. a restraining cover plate; 92. a filler plate; 93. slotted steel plate.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a manufacturing method of an assembled flexible defending jacket offshore wind turbine, which aims to solve the problems in the prior art.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
The assembled toughness defending jacket offshore wind turbine in the embodiment comprises a jacket foundation 2, a tower 5 and a wind turbine 1 as shown in fig. 1-11; the tower 5 is arranged on the top platform of the jacket foundation 2, and the fan 1 is arranged on the top of the tower 5 through a base;
the jacket foundation 2 comprises a plurality of conduit legs 3, inclined struts 4, a core tube 6 and viscous dampers 7; the plurality of conduit legs 3 are circumferentially arranged at intervals at the bottom of the tower 5, the tops of the conduit legs 3 are connected with the bottom of the tower 5 through bolts, the bottoms of the conduit legs 3 are fixed on the sea bottom through steel piles, a plurality of diagonal braces 4 are connected between two adjacent conduit legs 3, the diagonal braces 4 are connected with the conduit legs 3 through bolts, a core tube 6 is arranged between the plurality of conduit legs 3 and is positioned at the center of the bottom of the tower 5, and a viscous damper 7 is connected between the core tube 6 and the conduit legs 3 through bolts;
the guide pipe leg 3 comprises an inner steel pipe 31 and an outer steel pipe 32 along the radial direction, a concrete interlayer I33 filled with concrete is arranged between the inner steel pipe 31 and the outer steel pipe 32, a prestressed duct 34 is arranged in the concrete interlayer I33, a prestressed steel cable 35 is arranged in the prestressed duct 34, the top of the prestressed steel cable 35 is fixedly connected with the top of the jacket foundation 2, the bottom of the prestressed steel cable 35 is fixedly connected with the sea floor, the arrangement of the prestressed steel cable 35 can achieve the aim of improving the structural stability, and a part of self-resetting function is also realized when strong vibration such as ice-shock vibration, earthquake load and the like is encountered;
the conduit leg 3 comprises a conduit leg upper column 310 and a conduit leg lower column 311 along the length direction, the bottom of the conduit leg upper column 310 is provided with a conduit leg upper column end plate 38, the top and the bottom of the conduit leg lower column 311 are respectively provided with a conduit leg lower column end plate 39, the conduit leg upper column end plate 38 and the conduit leg lower column end plate 39 at the top of the conduit leg lower column 311 are connected through high-strength bolts, and a replaceable energy consumption assembly 9 is connected between the two conduit leg lower column end plates 39 of the conduit leg lower column 311. The damage to the toe joint when subjected to seismic loading can be concentrated in the replaceable energy consuming assembly 9 for energy dissipation and shock absorption.
In this embodiment, the first assembly mode is: the diagonal braces 4 are arranged in an X-shape between the two conduit legs 3; the same conduit leg 3 is provided with a plurality of nodes 8, the upper conduit leg 3 and the lower conduit leg 3 at the nodes 8 are connected through a flange 37, as shown in fig. 3, rib plates I36 are welded on the upper conduit leg 3 and the lower conduit leg 3 at the nodes 8, and the diagonal bracing 4 is fixed on the rib plates II 42 through corrosion-resistant bolts 41. As shown in fig. 4-5, in this embodiment, the pipe leg 3 at the node may also be an integral through-length structure, i.e. an assembly mode two, the diagonal brace is fixed on the pipe leg through the pipe buckle 10, the specific pipe buckle 10 is sleeved and fixed on the pipe leg 3 through the high-strength bolt 43, and the upper and lower sides are respectively connected with the diagonal brace 4 through the high-strength bolt 43.
The above-mentioned assembled steel structure adopts bolted connection node 8. The advantages of the bolt connection are that: the installation speed is high; the construction quality is easier to control. The on-site welding seam is a main part of the steel structure which is easy to corrode, the whole bolt connection can avoid the part, paint can be coated by factories completely, and the corrosion resistance of the steel structure is greatly improved. Based on the above, the nodes 8 are all set as the assembly type nodes 8 in the embodiment, and the bolts are used for connection, so that the trouble of underwater welding work can be avoided, and damaged parts can be replaced after disaster, thereby prolonging the service life of the structure; the assembling structure of the diagonal brace 4 meets the requirement of structure assembling, all welding works can be prefabricated and processed in factories, the burden of underwater welding works is reduced, and manpower and material resources are saved to a certain extent; and when suffering from disasters such as ice shock vibration or ship collision, damaged parts can be replaced and are connected again through bolts, so that the service life of the structure is greatly prolonged.
As shown in fig. 6, the top of the core tube 6 is welded with the upper platform of the jacket foundation 2, and the bottom is fixedly connected with the seabed through a steel pile; the core tube 6 comprises an outer steel tube 61 and an inner steel tube 63, a concrete interlayer II 62 filled with concrete is arranged between the outer steel tube 61 and the inner steel tube 63, the top of the core tube 6 is welded with the top of the jacket foundation 2, and the bottom is fixed with the seabed through a pile foundation. The core tube 6 is a main lateral force resisting structure of the super high-rise building structure, and the core tube 6 plays an important role in resisting wind load and earthquake besides bearing a large vertical load. Based on this, the present embodiment provides the core tube 6 in the jacket foundation 2 in the marine environment, with the aim of improving the overall rigidity of the jacket foundation 2 and exerting its advantage against lateral forces.
The viscous damper 7, which is made according to the principle that the fluid movement, in particular the restriction resistance, occurs when the fluid passes through the orifice, is a damper that is related to the speed of the piston movement. The traditional structure vibration resistance is to resist natural disasters such as earthquake, wind, snow, tsunami and the like by enhancing the vibration resistance of the structure. Because of the uncertainty of the action intensity and the characteristics of natural disasters, the structure designed by the traditional anti-vibration method does not have self-adjusting capability, so that when an earthquake comes, great economic loss and casualties are often caused. The development and application of viscous energy consuming dampers is equivalent to the installation of "airbags" for buildings or bridges. When an earthquake comes, the damper absorbs and consumes the impact energy of the earthquake to the building structure to the maximum extent, and the impact and damage of the earthquake to the building structure are greatly relieved. Based on this, in the present embodiment, a viscous damper 7 is provided between the core tube 6 and the pipe leg 3 to cope with the load effects of ice, wind, waves, currents, earthquakes, and the like, thereby achieving the purpose of vibration reduction. In this embodiment, two ends of the viscous damper 7 are respectively connected with the core tube 6 and the welding rib plates three 71 on the catheter leg 3 through corrosion-resistant bolts 41. The advantage is that the damping effect of the viscous damper 7 can be exerted, and the assembly requirement of the node 8 is met.
As shown in fig. 8 to 11, the replaceable energy consumption assembly includes a constraint cover plate 91, a filling plate 92, and a slotted steel plate 93, wherein the slotted steel plate 93 is provided with one or more pieces along the periphery of the lower leg post 311, the top and bottom of the slotted steel plate 93 are respectively connected with the two lower leg post end plates 39 through bolts, and the side surfaces are fixed on the lower leg post 311 through bolts. The outside of the slotted steel plate 93 is connected with a constraint cover plate 91 through bolts, and is used for limiting the easy-yielding slotted steel plate 93 from out-of-plane instability; the filler plates 92 fill both sides or the slit of the slit steel plate 93, and can restrict the occurrence of in-plane instability of the yielding slit steel plate 93. The assembly type is adopted, so that the installation is convenient, and the replacement is realized when the damage occurs; the node 8 has the energy consumption function, reduces the damage caused by ice shock vibration or ship impact, and prolongs the service life of the whole novel jacket foundation for toughness defense of the offshore wind turbine. The yieldable slotted steel plate 93 in the high-ductility replaceable yieldable energy-consuming slotted assembly keeps elastic, and can provide bending rigidity for the column foot of the conduit leg 3; during medium or large earthquake, the easy-yielding slotted steel plate 93 is subjected to tensile or compressive yielding, and the hysteresis performance of the easy-yielding slotted steel plate is utilized to dissipate earthquake energy, so that the dynamic response of the structure is reduced.
The embodiment also provides a manufacturing method of the fabricated flexible defending jacket offshore wind turbine, which is applied to the fabricated flexible defending jacket offshore wind turbine in the embodiment, wherein the structures of the wind turbine 1, the conduit leg 3, the diagonal brace 4, the core tube 6, the viscous damper 7 and the like are all prefabricated and assembled in factories;
the method comprises the following specific steps:
1) Shaping of the core tube 6 and the catheter leg 3: the inner steel cylinder 63 and the outer steel cylinder 61 forming the core cylinder 6 are prefabricated in a factory, and sandwich concrete is poured between the inner steel cylinder 63 and the outer steel cylinder 61; the inner steel pipe 31 and the outer steel pipe 32 forming the conduit leg 3 are prefabricated and processed in a factory, the inner steel pipe 31, the outer steel pipe 32 and the prestressed pipe 34 are fixed, and sandwich pouring concrete is poured;
2) Shaping a jacket foundation 2: the buckling restrained brace 4 and the connection sleeve members at the two ends are prefabricated in a factory, after the truss formed by the conduit leg 3 and the brace 4 and the core tube 6 are assembled and formed, the brace 4 and the conduit leg 3 are connected through high-strength bolts 43 and reserved bolt holes, wherein the core tube 6 is connected to the top platform of the conduit frame foundation 2 through flanges, and after the conduit frame foundation 2 and the core tube 6 are installed, the buckling restrained brace is installed to form a structure;
3) Assembling the offshore wind turbine: after the prefabrication of the structure in the steps is completed, the structure is transported to an offshore construction site through lightering or floating, a jacket foundation 2 is fixed on the sea bottom through piling, and grouting and prestress tensioning are carried out after the jacket foundation is leveled; after the tensioning is completed, the slotted steel plates 93 are then bolted between the two lower leg end plates 39 of the lower leg 311, thereby forming the jacket foundation 2.
4) And (3) installing a fan 1: the fan 1 including the fan tower 5 and the whole upper-layer facilities is installed and debugged on shore in advance as a whole, and then the whole transportation site is installed and debugged, and the method can be divided into land splicing, marine transportation and marine hoisting.
The principles and embodiments of the present invention have been described with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In summary, the present description should not be construed as limiting the invention.
Claims (7)
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| CN202311182353.3A CN117005995B (en) | 2023-09-13 | 2023-09-13 | A method for manufacturing an assembled toughness defense jacket offshore wind turbine |
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| CN202311182353.3A CN117005995B (en) | 2023-09-13 | 2023-09-13 | A method for manufacturing an assembled toughness defense jacket offshore wind turbine |
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| CN117005995B true CN117005995B (en) | 2024-04-16 |
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