CN110723259A - Spar type foundation offshore floating wind driven generator with slidable sleeve - Google Patents

Spar type foundation offshore floating wind driven generator with slidable sleeve Download PDF

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Publication number
CN110723259A
CN110723259A CN201910987216.4A CN201910987216A CN110723259A CN 110723259 A CN110723259 A CN 110723259A CN 201910987216 A CN201910987216 A CN 201910987216A CN 110723259 A CN110723259 A CN 110723259A
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CN
China
Prior art keywords
ring layer
sleeve
outer ring
cabin
tank
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Pending
Application number
CN201910987216.4A
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Chinese (zh)
Inventor
章培
李焱
赵志娟
曲晓奇
王丽元
赵治民
刘峥
白杰
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Tianjin University
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Tianjin University
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Priority to CN201910987216.4A priority Critical patent/CN110723259A/en
Publication of CN110723259A publication Critical patent/CN110723259A/en
Pending legal-status Critical Current

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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 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/4433—Floating structures carrying electric power plants
    • B63B2035/446—Floating structures carrying electric power plants for converting wind energy into electric energy
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/727—Offshore wind turbines

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Ocean & Marine Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)

Abstract

The invention relates to a Spar type foundation offshore floating wind driven generator with a slidable sleeve, which comprises an upper fan (1), a cylindrical foundation upright post (2), an inner ring layer sleeve (4), an outer ring layer sleeve (5) and a bottom ballast tank (6), wherein an inverted U-shaped annular cover plate (3) is arranged below the foundation upright post (2), the inner ring layer sleeve (4) comprises a watertight partition plate (41) tightly connected with the upright post, a trapezoidal protection tank (42) is additionally arranged outside the sleeve, a traction trolley (44) is arranged in the protection tank (42), the traction trolley (44) is fixedly connected with an outer ring layer control tank (51) through a transverse connecting shaft (45), the traction trolley (44) can move up and down along an in-tank guide rail (46), and the whole outer ring layer sleeve (5) is driven to slide up and down by controlling the up and down movement of the trolley on the guide rail.

Description

Spar type foundation offshore floating wind driven generator with slidable sleeve
Technical Field
The invention relates to the technical field of offshore wind power generation, in particular to a Spar type foundation offshore wind power generator with a slidable sleeve.
Background
At present, offshore wind power plants in China are mainly distributed in beach or intertidal zones of coastal zones, are about 10 kilometers away from a coastline, have water depths generally not more than 20 meters, and mainly adopt fixed-type basic wind turbines. The fixed foundation wind turbines applied to shallow sea areas mostly adopt pile foundation type structures or concrete type bases and are mostly in rigid connection. According to the general survey results of offshore wind energy resources, the development amount of wind energy with the water depth of 5-25 m and the sea level height of more than 50 m in China is about 2 hundred million kilowatts; the development amount of wind energy with the water depth of 50 meters and the sea level height of more than 70 meters is about 5 hundred million kilowatts. Obviously, with the increase of the water depth and the sea level height, the larger the wind speed of the wind field is, the better the stability is, and the richer the wind energy resources are. But the environmental load that fan structure bore is also increasing constantly simultaneously, and for fixed basis, because seabed mud face department moment of flexure increases by a wide margin, in order to guarantee the sufficient intensity and the rigidity of structure, can only pass through the structure yardstick that increases constantly in the design, cause the construction of fixed basis, installation and construction cost to improve by a wide margin from this, economic nature reduces. The traditional floating wind turbine structure is generally applied to sea areas with water depth of more than 100 meters and mainly comprises a Spar type foundation, a semi-submersible type foundation and a tension leg type foundation. For the medium-shallow water depth sea area of 30-100m, a fan structure corresponding to a foundation form does not exist at present. As the landform of the continental shelf in China is flat, when the water depth reaches 100m, the offshore distance reaches 50km or more, and the cost of laying cables and related supporting facilities is sharply increased. Therefore, in consideration of the actual sea area landform of the continental shelf in China, a novel wind power foundation form suitable for the medium and shallow water sea areas is developed, is a key way for solving the problems of long-term shortage of energy, environmental pollution and the like in China, is an important measure for optimizing the energy structure in China, and meets the strategic demand for developing new offshore energy in China.
A traditional Spar type foundation usually adopts a single-column cylindrical stand column structure as a floating body, mooring is carried out by adopting an anchor chain or a tensioning type nylon cable, and a ballast tank is arranged at the bottom of the foundation to lower the gravity center position, so that the whole gravity center of the structure is positioned below a floating center, and the wind turbine is guaranteed to have sufficient stability. The Spar type basic wind turbine has larger draught and good heaving performance, but the transverse dimension is small, the area of the water plane is insufficient, and the overall rolling and pitching restoring moment of the structure is small, so that the shaking movement of the fan structure is large, and the operation safety is insufficient.
The invention is based on the traditional Spar type foundation floating type fan, reduces the vertical size of the upright column, increases the whole water discharge of the structure, reduces the draught by additionally arranging the sleeve structure on the foundation upright column, provides six-degree-of-freedom motion damping for the structure and improves the whole stability of the structure. The sleeve sets up outside the foundation column for loop configuration, and it is two-layer to divide into inside and outside lane, and inner circle layer sleeve hugs closely the stand surface and passes through flange, bolt isotructure fixed connection, and outer circle layer sleeve sets up outside the basis for the type of falling U loop configuration, sets up electrical system in the outer circle layer, sets up guide rail and trolley-bus in the inner circle layer and is connected with the outer lane layer through the connecting axle, through the vertical slip of the steerable outside sleeve structure of electrical control guide rail system. The floating type wind turbine structure adopting the basic form is obviously superior to the traditional Spar type floating type wind turbine in movement performance and damping characteristic, and meanwhile, the movement posture and draught of the wind turbine can be adjusted by controlling the sleeve structure to move up and down, so that the wind turbine foundation is suitable for different operating water depths and sea conditions, the applicable water depth of the floating type wind turbine structure is widened, the offshore wind power development cost in the middle and shallow water depth range is reduced, and the operation safety of the floating type wind turbine structure is fully ensured.
Object of the Invention
The invention aims to develop a floating type fan structure to solve the problems of large size and low cost performance of a fixed foundation structure in the water depth range, and the floating type fan structure greatly reduces the movement amplitude of a fan foundation, improves the integral stability of the structure, widens the applicable water depth and fully ensures the normal power generation operation of a wind turbine by additionally arranging a sleeve structure. The technical scheme is as follows:
a Spar-type foundation offshore floating wind driven generator with a slidable sleeve comprises an upper fan 1, a cylindrical foundation column 2, an inner ring layer sleeve 4, an outer ring layer sleeve 5 and a bottom ballast tank 6, wherein an inverted U-shaped annular cover plate 3 is arranged below the foundation column 2.
The inner ring layer sleeve 4 comprises a watertight baffle plate 41 tightly connected with the upright post, a trapezoidal protection cabin 42 is additionally arranged outside the sleeve, a traction trolley 44 is arranged in the protection cabin 42, the traction trolley 44 is fixedly connected with an outer ring layer control cabin 51 through a transverse connecting shaft 45, the traction trolley 44 can move up and down along an inner cabin guide rail 46, and the whole outer ring layer sleeve 5 is driven to slide up and down by controlling the up-and-down movement of the trolley on the guide rail.
A control cabin 51, a structural buoyancy cabin 52 and an annular counterweight cabin 53 are arranged in the outer ring layer sleeve 5, and an electric rail control system is arranged in the outer ring layer control cabin in a watertight manner and comprises a controller 511 and a sealing partition plate 512.
Preferably, the inner and outer annulus sleeves and the bottom ballast tank 6 are spaced apart and encapsulated with each other to form a semi-enclosed annular moon pool structure.
The bottom ballast tank 6 is arranged at the bottom of the foundation column 2 and is divided into a soft tank 61 and a hard tank 63 from top to bottom, the soft tank and the hard tank are flexibly connected through a floating spring layer, and the floating spring layer comprises a spring cushion block 62 arranged in the soft tank 61.
The spring cushion block 62 comprises a steel top block 621, a pressure lever 622 is fixedly connected to the upper portion of the top block, the pressure lever is respectively connected with a first-stage spring 625 on the central axis and second-stage springs 624 on two sides, and a rubber cushion block 626 is arranged on the top of the second-stage springs 624.
And annular edge structures 7 with certain thickness are arranged at the top and the bottom of the outer ring layer sleeve 5.
The invention relates to a Spar type foundation offshore floating wind power generator device with a sleeve capable of sliding up and down, in particular to a multi-floating-body combined floating wind power generator device. The invention is based on the traditional Spar type foundation floating type fan, reduces the vertical size of the upright post, reduces the draught by additionally arranging the sleeve structure on the foundation upright post, provides six-degree-of-freedom motion damping for the structure and improves the integral stability of the structure. The sleeve is of an annular structure and is arranged outside the foundation column and is divided into an inner ring layer and an outer ring layer, the inner ring layer is tightly attached to the surface of the column and is fastened and connected through structures such as flanges and bolts, and the outer ring layer device slides up and down along the vertical direction of the foundation through an electric control guide rail system.
1. The novel floating fan can be applied to the middle-shallow water depth sea area of 30-100m, is suitable for the special landform of the continental shelf sea area in China, can replace the engineering application of a large-scale fixed foundation fan, effectively reduces the construction cost, fills the technical blank in the water depth range, and has good application prospect.
2. Compared with the traditional Spar type basic wind turbine, the wind turbine structure provided by the invention has the advantages that the dimension in the vertical direction is reduced, the transverse dimension is increased by additionally arranging the sleeve structure, the structure can be ensured to have enough stability under the condition of not using a mooring system, meanwhile, the electric control guide rail system controls the outer sleeve to vertically slide, the motion posture and draught of the wind turbine are adjusted in real time, the disadvantage of poor rolling and pitching motion performance of the Spar type basic wind turbine is made up, and the wind turbine foundation is suitable for different operating water depths and sea conditions.
3. The annular heave cover plate of the circle below the connecting position of the stand column can effectively restrain the wave climbing and heaving motion at the water line surface of the foundation structure, and meanwhile, the watertight performance of the connecting position of the stand column is improved to a certain extent.
4. The ballast tank is arranged at the bottom of the foundation upright post, so that the gravity center of the structure can be reduced, and the overall stability of the structure is improved; meanwhile, the ballast tank is divided into a soft tank and a hard tank, and a floating spring layer is arranged at the joint of the soft tank and the hard tank, so that the basic heave motion damping can be increased, and the buffering effect is achieved in the vertical direction.
5. The bottom ballast tank is of a cylindrical column structure, the surface of the ballast tank is provided with equidistant steel spiral side strips, so that the vortex-induced action of bottom water flow can be effectively inhibited, and meanwhile, two circles of rubber lugs are arranged at the upper and lower positions of the ballast tank to weaken the vortex effect of a gap at the joint of the soft and hard tanks.
6. The inner and outer ring layer sleeves and the bottom ballast tank are spaced at a certain distance and are mutually packaged to form a semi-closed annular moon pool structure, so that damping effects in the heaving, rolling and pitching directions are increased on the basis, and meanwhile, the structural size of the moon pool can be controlled in real time due to the up-and-down sliding of the sleeves, and the damping effect is controlled.
7. The stand is plus to install double-deck sleeve device, has effectively protected the operation safety of fan foundation stand, has improved structure bulk strength, has also greatly improved the operation stability under the extreme sea condition of structure simultaneously.
8. The outer circle layer sleeve adopts the design of the inverted U-shaped structure, on one hand, the steel consumption can be reduced, the construction cost is reduced, and on the other hand, a semi-closed moon pool structure is also formed in the U-shaped groove, so that additional motion damping is provided for the foundation.
9. The top and the bottom of the outer ring layer sleeve are provided with annular edge structures with certain thickness, vortex-induced motion on the surface of the sleeve cylinder can be effectively inhibited, and a certain wave-absorbing effect can be achieved.
10. The designed heave cover plate, the double-layer sleeve and the bottom ballast tank structure are detachable devices, can be correspondingly modified on the scale according to the actual operation requirement of the fan, are convenient to assemble and disassemble in the whole structure, can be built and assembled in sections at a wharf and a port, and then are integrally wet-towed to a target wind field.
Drawings
FIG. 1 is an external structural view of a blower fan;
FIG. 2 is a front cross-sectional view of the blower;
FIG. 3 is a top view of the fan;
FIG. 4 is a view of the exterior of the ballast tank;
FIG. 5 is an enlarged view of section I of FIG. 1;
FIG. 6 is an enlarged view of section II of FIG. 1
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. The specific embodiments described herein are merely illustrative of the present invention and do not limit the scope of the invention.
The invention relates to a Spar type foundation offshore floating wind power generator device with a slidable sleeve, in particular to a multi-floating-body combined floating wind power generator device. The problem that the fixed foundation with the water depth of 30-100 meters is large in size and low in cost performance can be effectively solved, the six-degree-of-freedom motion amplitude of the fan foundation can be greatly reduced by additionally arranging the sleeve structure, the overall stability of the structure is improved, and safety guarantee is provided for safe power generation of the wind turbine structure.
As shown in fig. 1, the main structure of the invention comprises an upper fan 1, a cylindrical foundation column 2, an inner ring layer sleeve 4, an outer ring layer sleeve 5 and a bottom ballast tank 6, wherein an inverted U-shaped annular cover plate 3 is arranged below the foundation column 2, and annular edge structures 7 with certain thicknesses are arranged at the top and the bottom of the outer ring layer sleeve 5.
As shown in fig. 2, the upper fan structure 1 comprises fan blades 11, a hub 12 and a nacelle 13; the basic upright post 2 is divided into two parts above a waterline and below the waterline, the contact surfaces of the two parts are connected through a fastening bolt 31, and the lower part of the connection part is connected with an inverted U-shaped annular cover plate 3 for preventing waves from climbing through a flange 32, the height value is about the maximum wave height value of a wind turbine operating sea area in a situation of meeting sea conditions for fifty years and one year, and the maximum outer ring diameter is two wavelength distances; the inner ring layer sleeve 4 comprises a watertight baffle plate 41 tightly connected with the upright post, a trapezoidal protection cabin 42 is additionally arranged outside the sleeve, a traction electric car 44 is arranged in the cabin, the electric car is connected with a transverse connecting shaft 45 and communicated to the outer ring layer control cabin, the traction electric car 44 can move up and down along a guide rail 46 in the cabin, a limiting stopper 43 is arranged on the upper portion and the lower portion of the traction electric car, and a buffer 47 is arranged at the bottom of the cabin.
In fig. 2, the outer ring layer sleeve 5 is an inverted U-shaped annular structure, a control cabin 51, a structural buoyancy cabin 52 and an annular counterweight cabin 53 are arranged in the outer ring layer sleeve, and a controller 511, a sealing partition plate 512 and the like are arranged in the outer ring layer control cabin 51 in a watertight manner; the outer ring layer sleeve can be connected with the inner ring layer sleeve through a connecting shaft; the middle cabin is a structural buoyancy cabin 52, the lower cabin is an annular counterweight cabin 53, and ballast can be adjusted according to the water depth condition of the operation sea area; the inner and outer ring layer sleeves and the bottom ballast tank are spaced at a certain distance and are mutually packaged to form a semi-closed annular moon pool structure, so that damping effects in the directions of heaving, rolling and pitching are increased on the basis, and meanwhile, the structural size of the moon pool can be adjusted due to the up-and-down sliding of the sleeves, and the damping effect is controlled. The bottom ballast tank 6 is arranged at the bottom of the foundation column 2 and is divided into a soft tank 61 and a hard tank 63 from top to bottom, the soft tank and the hard tank are flexibly connected through a floating spring layer, and the floating spring layer is packaged in the soft tank 61 through a fastening bolt 627 and consists of a circle of spring cushion blocks 62.
As shown in fig. 4, the ballast tank surface is provided with equally spaced steel helical sidebars 64 and two rubber bumps 65 near the floating spring layer.
As shown in fig. 5, the spring cushion block includes a steel top block 621, a pressure rod 622 is fixedly connected to the upper portion of the top block, the pressure rod is respectively connected to a first-level spring 625 on the central axis and second-level springs 624 on two sides, a rubber cushion block 626 is arranged on the top of the second-level spring 624, when the base bottom is acted by an upward wave force, the top block pushes the pressure rod to extrude the spring, and the first-level spring, the second-level springs and the rubber cushion block can achieve an effective buffering effect.
As shown in fig. 6, the top and bottom of the outer circle layer sleeve 5 are provided with annular edge structures 7 with a certain thickness, and the cross-sectional shapes of the edges can be rectangle 71, semicircle 72, trapezoid 73 and triangle 74.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims (5)

1. A Spar-type foundation offshore floating wind driven generator with a slidable sleeve comprises an upper fan (1), a cylindrical foundation column (2), an inner ring layer sleeve (4), an outer ring layer sleeve (5) and a bottom ballast tank (6), wherein an inverted U-shaped annular cover plate (3) is arranged below the foundation column (2),
the inner ring layer sleeve (4) comprises a watertight partition plate (41) tightly connected with the stand column, a trapezoidal protection cabin (42) is additionally arranged outside the sleeve, a traction trolley car (44) is arranged in the protection cabin (42), the traction trolley car (44) is fixedly connected with an outer ring layer control cabin (51) through a transverse connecting shaft (45), the traction trolley car (44) can move up and down along an in-cabin guide rail (46), and the whole outer ring layer sleeve (5) is driven to slide up and down through the up-and-down movement of the control trolley car on the guide rail.
The outer ring layer sleeve (5) is internally provided with a control cabin (51), a structural buoyancy cabin (52) and an annular counterweight cabin (53), the outer ring layer control cabin is internally provided with a power rail control system in a watertight manner, and the power rail control system comprises a controller (511) and a sealing partition plate (512).
2. Wind generator according to claim 1, characterised in that the inner and outer jacket sleeves and the bottom ballast tank (6) are spaced apart and encapsulated to form a semi-closed annular moon pool structure.
3. Wind generator according to claim 1, characterised in that the bottom ballast tank (6) is arranged at the bottom of the foundation column (2) and is divided into a soft tank (61) and a hard tank (63) from top to bottom, which are flexibly connected by a floating spring layer comprising spring spacers (62) arranged in the soft tank (61).
4. The wind driven generator according to claim 3, characterized in that the spring cushion block (62) comprises a steel top block (621), a pressure rod (622) is fixedly connected to the upper portion of the top block, the pressure rod is respectively connected with a primary spring (625) on the central axis and secondary springs (624) on two sides, and a rubber cushion block (626) is arranged on the top of the secondary springs (624).
5. Wind generator according to claim 1, characterized in that the outer ring layer sleeve (5) is provided with a thickness of annular edge structure (7) at the top and bottom.
CN201910987216.4A 2019-10-17 2019-10-17 Spar type foundation offshore floating wind driven generator with slidable sleeve Pending CN110723259A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910987216.4A CN110723259A (en) 2019-10-17 2019-10-17 Spar type foundation offshore floating wind driven generator with slidable sleeve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910987216.4A CN110723259A (en) 2019-10-17 2019-10-17 Spar type foundation offshore floating wind driven generator with slidable sleeve

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102152841A (en) * 2010-03-04 2011-08-17 王晋 Vertically installed Spar-type floater for offshore wind generator and construction methods
EP2635489A2 (en) * 2010-11-04 2013-09-11 University of Maine System Board of Trustees Floating hybrid composite wind turbine platform and tower system
CN106428446A (en) * 2016-09-30 2017-02-22 吴植融 Straight cylinder type floating platform with extended cylinder body
CN108119315A (en) * 2017-12-27 2018-06-05 浙江大学 A kind of floating blower foundation for improving structural stability
CN109927857A (en) * 2019-04-22 2019-06-25 上海交通大学 A kind of self-stabilising polystyle offshore floating type wind-powered electricity generation Spar platform

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102152841A (en) * 2010-03-04 2011-08-17 王晋 Vertically installed Spar-type floater for offshore wind generator and construction methods
EP2635489A2 (en) * 2010-11-04 2013-09-11 University of Maine System Board of Trustees Floating hybrid composite wind turbine platform and tower system
CN106428446A (en) * 2016-09-30 2017-02-22 吴植融 Straight cylinder type floating platform with extended cylinder body
CN108119315A (en) * 2017-12-27 2018-06-05 浙江大学 A kind of floating blower foundation for improving structural stability
CN109927857A (en) * 2019-04-22 2019-06-25 上海交通大学 A kind of self-stabilising polystyle offshore floating type wind-powered electricity generation Spar platform

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Application publication date: 20200124