A wind power equipment installation and transportation ship structure design method

Abstract

The application relates to a wind power equipment installation and transportation ship structure design method, and belongs to the technical field of ships and ocean engineering. A continuous longitudinal wall and an inner wall are arranged between a working deck and an outer plate. The longitudinal wall is determined according to the size of a pile leg. A main deck, an inner bottom, the outer plate and the longitudinal wall are continuous structures and bear the total longitudinal strength. The working deck, a local platform and the inner wall are local structures and do not bear the total longitudinal strength. A cabin surrounded by the main deck and the inner bottom is a cargo cabin. The cargo cabin is a full-through structure from the bow of the ship body to the stern. The ship body is a structure with discontinuous strength in the transverse direction. The discontinuous strength includes no transverse bulkhead, no support and no typical strong frame structure. The ship width is greatly optimized, the structural stress level under the torque is reduced, a feasible scheme is provided for the transverse bulkhead-free structure design of the ship body, and the pile leg can be stored in the cargo cabin and transported due to the realization of the transverse bulkhead-free structure design.

Description

TECHNICAL FIELD

[0001] The present application relates to a wind power equipment installation and transportation ship, in particular to a typical structure of a wind power equipment installation and transportation ship, and belongs to the technical field of ship and ocean engineering. BACKGROUND

[0002] The existing wind power equipment installation and transportation ship has a limited number of wind turbine blades, and the installation speed is particularly slow. In the operation process, the pile legs often need to be lowered and positioned, and after the operation is completed, the pile legs need to be recovered. Since the wind power equipment transportation ship has high requirements for the operation window period, the existing wind power equipment transportation ship has many difficult-to-solve drawbacks in the existing operation environment.

[0003] In addition, with the explosive growth of the wind power industry in recent years, many wind power pile legs have damaged the marine navigation planning or have structural damage and repair, etc. If the original pile legs can be directly recovered and transported, and the blades can also be directly transported, such a ship type will have great use in the future.

[0004] Therefore, the existing wind power equipment installation and transportation ship type relies on a single pile to realize positioning, and can completely arrange the blades and the pile legs in the main hull. According to its type value, it is known that the main control load is the vertical bending moment, that is, the total longitudinal strength is the primary strength index. However, due to the reasons such as floating installation of wind power pile legs, the cargo hold is a full-through structure, which is very different from the existing ship type. The total longitudinal strength of the main hull can be ensured by the combination of the outer plate, the continuous longitudinal wall and the main deck. However, the transverse strength related to the transverse load and the strength under the action of the torque cannot be provided as a reference or solved by the existing technology. SUMMARY

[0005] The existing wind power equipment installation and transportation ship cannot guarantee the simultaneous transportation of blades and pile legs, and the newly proposed ship type has problems of difficult-to-satisfy strength requirements of transverse strength and local strength.

[0006] In order to solve the above problems, the present application proposes a typical transverse section structure of a wind power equipment installation and transportation ship, a typical strong frame structure, a typical large strong frame structure and a transverse section structure at the position of the pile holding system.

[0007] In order to achieve the above object, the technical scheme of the present application provides a kind of wind power equipment installation transport ship structure design method, from top to bottom respectively for operation deck, main deck, local platform, inner bottom and outer plate, continuous longitudinal wall is arranged between the operation deck to outer plate, and inner wall, the longitudinal wall is determined according to pile leg size, not the center position of ship body, the main deck, the inner bottom, the outer plate and the longitudinal wall are continuous structure, bear total longitudinal strength, the operation deck, the local platform and the inner wall are local structure and do not bear total longitudinal strength;The cabin surrounded between the main deck and inner bottom is cargo hold, the cargo hold is full through structure from the bow of the ship body to the tail, the ship transverse is discontinuous ship structure in structure strength, the strength discontinuity includes no transverse bulkhead, no support, no typical strong frame structure, and the typical strong frame structure is the continuous ship body reinforcing structure in structure strength.

[0008] Preferably, according to the structure design method, a typical transverse section structure of a wind power equipment installation transport ship is obtained, from port to starboard, the main component plates are respectively port side outer plate, inner wall, longitudinal wall, operation deck lower coaming and starboard side outer plate;There is also a side outer structure, the determination method of the transverse position of the longitudinal wall is to deduct the space required by the maximum design pile leg size, and the design principle is that the web height of the girder shall not be less than the height of the main deck to the inner bottom, the width of the outer structure is determined according to the effective width of the contact blade, and the width of the outer structure is limited to the ship width, and the width of the outer structure is determined according to the reliability of the blade transmission, from port to starboard, the secondary component plates are divided into large knee support structure, ordinary beam structure and inner bottom rib plate structure, the large knee support structure is located below the main deck, and the free edge is arc-shaped.

[0009] Preferably, the operation deck is located at one side of the ship body with a large opening, the cabin space surrounded between the operation deck and the main deck is supported by a support, the support is arranged every 20 degrees, and the support is aligned with the inner wall, the height between the operation deck and the main deck is determined according to the height of the lowest layer of blades on the blade support from the main deck and the number of layers of blades, and is not less than 2 / 3 of the height of the center axis of the lowest layer of blades from the main deck, the number of layers of blades is not more than 3, the main deck is provided with a latch above the opening side, the latch is an L-shaped latch, and the L-shaped latch is used to fix the blade support;The longitudinal stiffening girder structure below the main deck is determined according to the span of the longitudinal wall below the main deck to the adjacent farthest bulkhead, and the positioning position of the longitudinal girder is determined according to the position of the L-shaped latch, in addition to the longitudinal stiffening girder below the main deck, which is distributed according to equal interval rib distance.

[0010] Preferably, a large elbow plate for positioning the pile legs is provided on the inner bottom. The height h of the inner bottom is determined according to the loading conditions. An elastic pad is provided on the large elbow plate to fit the outer diameter of the pile legs of various diameters. The diameter of the pile legs D0 ≤ 10m, the length of the pile legs L0 ≤ 100m, and the distance between the free edge of the large elbow plate and the outer diameter of the pile legs does not exceed 350mm. The width of the installed blade is 5 meters, and the width of the outward-flaring structure is 3.9 meters. The blade is placed at an angle on the support, the width of the blade support is 11.2 meters, and the width of the large opening is 12 meters.

[0011] Preferably, by using the large elbow plate support structure to reduce hull shape values ​​such as ship length, ship width, and molded depth, the hull's lateral strength is ensured even without transverse bulkheads, struts, or typical strong frame structures.

[0012] Preferably, the length of the pile leg is L0 / m, the diameter of the pile leg is D0 / m, and the ballast water volume of the forepeak tank is V0 / m. 3 Then the width of the cargo hold area B1 is B1≥3D0+0.8, the width of the ship B is B=B1+B2, and the length of the ship L is L≥L0+V0 / (B×h).

[0013] Preferably, the ordinary crossbeams are set with 4 rib spacings, each rib spacing is 0.6m, and the crossbeam web height does not exceed 0.3m; the large elbow plate structure includes the large elbow plate support structure and the large elbow plate, the large elbow plate structure is set with 20 rib spacings, the large elbow plate structure is distributed in the cargo hold and is located at the four corners of the space enclosed by the pile legs and the cargo hold bulkhead, the four corners are respectively located below the main deck and above the inner bottom.

[0014] Preferably, the inner wall in the equipment compartment area is discontinuous, specifically referring to a discontinuous strength, meaning the hull material has an intermittent structure. For compartments requiring watertightness, this can be achieved through other methods. One side of the inner wall houses ballast water tanks and a generator compartment and engine compartment separated by the platform, while the other side houses a cargo hold for the pile legs. The pressure imbalance on both sides of the inner wall results in significant shear force. The inner wall plate thickness and reinforcement specifications are determined based on design loading calculations for typical shear force conditions. The width B2 of the local compartment enclosed between the inner wall and the outer side plating is determined based on the size of the control motor of the piling system and the required web height for the compartment structure strength. The piling system is installed within the enclosed space formed by the inner wall, the local platform, and the main hull. The piling system is controlled by the engine to achieve rotation. The height of the girder web on the other side of the connection between the local platform and the inner wall meets the local strength requirements for the girder web height without interfering with the maximum design value of the pile leg diameter. The engine is arranged on the inner bottom, and a base is provided below the engine. The base panels are on the same plane and the ends are not enlarged to control the beam. The base is welded along the inner wall, inner bottom, and hull side. The base panels at the contact positions with the outer hull side plates and the contact positions with the inner wall are beveled. The generator is arranged on the main deck.

[0015] Preferably, the large elbow plate has an opening at the pipe crossing position, and the elbow plate structure is without opening at the position where no pipe crosses; a solid wooden block is set between the two longitudinal ribs below the main deck where the distance between the main deck and the pile leg is the closest; the longitudinal dimension of the solid wooden block is the beam spacing, the transverse dimension is the longitudinal rib spacing, and the height is the longitudinal rib height; a slot is provided between the two large elbow plate structures above the inner bottom, and the width of the slot is smaller than the diameter of the pile leg to be transported.

[0016] Preferably, there are no more than 3 layers of blades; the height between the working deck and the main deck is not less than 2 / 3 of the distance from the center axis of the bottommost blade to the main deck; the bulkhead on the side of the large opening of the working deck is aligned with the mid-longitudinal bulkhead; the space enclosed between the mid-longitudinal bulkhead and the side of the hull below the working deck is supported by pillars, with pillars installed every 20 rows, and the pillars are aligned with the inner wall I.

[0017] The transverse section structure design of this ship greatly optimizes the beam, thereby reducing the structural stress level under torque. This provides a feasible solution for the design of a ship without transverse bulkheads. It is precisely because of the realization of the transverse bulkhead-free structure design that the pile legs can be preserved in the cargo hold, which facilitates transportation.

[0018] Therefore, the solutions proposed in this invention have solved all the technical problems mentioned in the background section. Attached Figure Description

[0019] Figure 1 This is a typical cross-sectional view of the structure of a wind power equipment installation and transportation vessel according to the present invention;

[0020] Figure 2 This is a cross-sectional schematic diagram of a wind power equipment installation and transportation vessel structure including a pile-holding system according to the present invention.

[0021] Figure 3 This is a typical rigid frame schematic diagram of a wind power equipment installation and transportation vessel structure according to the present invention;

[0022] Figure 4 This is a schematic cross-sectional view of a typical large strong frame structure of a wind power equipment installation and transportation vessel according to the present invention.

[0023] Figure 5 This is a schematic diagram of the structure of a wind power equipment installation and transportation vessel according to the present invention, which includes wind turbine blades and wind turbine pile legs;

[0024] Figure 6 This is a schematic diagram of the structure of a wind power equipment installation and transportation vessel according to the present invention, including the under-deck truss.

[0025] Figure 7 This is a schematic diagram of a wind power equipment installation and transport vessel structure marked with liquid tanks and cargo tanks according to the present invention;

[0026] Figure 8 This is a schematic diagram of the stress results of the structural plate frame of a wind power equipment installation and transportation vessel according to the present invention;

[0027] Figure 9 This is a schematic diagram of the stress results of the structural skeleton of a wind power equipment installation and transportation vessel according to the present invention.

[0028] Reference numerals: 1. Working deck; 2. Main deck; 3. Partial platform; 4. Inner bottom; 5. Outer plating; 6. Port side outer plating; 7. Inner wall; 8. Mid-longitudinal wall; 9. Lower bulkhead of working deck; 10. Starboard side outer plating; 11. Side overhang structure; 12. Leg; 13. Blade; 14. L-shaped pin; 15. Blade support; 16. Steel; 17. Solid wood block. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] This invention discloses a structural design method for a wind power equipment installation and transportation vessel, such as...Figure 1 As shown, a typical cross-sectional view of implementing the present invention is illustrated.

[0031] The horizontal plates from top to bottom are the working deck 1, main deck 2, partial platform 3, inner bottom 4, and outer plate 5. The main deck 2, inner bottom 4, and outer plate 5 are continuous structures that bear the overall longitudinal strength. The working deck 1 has a large opening on the starboard side and contributes less to the overall longitudinal strength. The partial platform 3 is a partial structure and does not bear the overall longitudinal strength.

[0032] The plates from port to starboard are: port side outer plate 6, inner wall 7, center longitudinal wall 8, working deck lower bulkhead 9, and starboard side outer plate 10.

[0033] In addition, there is a flared structure on the side of the hull 11.

[0034] like Figure 2 The diagram shows a cross-sectional view of the piling system. The rack storing the blades 13 is placed within the opening area of ​​the working deck 1 and on the main deck 2. The piling legs 12 are placed in the cargo hold formed by the main deck 2 and the inner bottom 4; one leg can be placed in the port cargo hold, and two legs can be placed in the starboard cargo hold. Adjacent to the port cargo hold is a ballast tank, and inside the ballast tank, at the location of the piling system, is an engine. A generator for controlling the piling system is placed on a partial platform 3 above the engine.

[0035] The cross-sectional structures of a typical strong frame and a typical large strong frame are as follows: Figure 3 as well as Figure 4 As shown.

[0036] The technical solution and corresponding design method proposed in this invention are illustrated with specific embodiments.

[0037] Since this vessel type lacks transverse bulkheads, in addition to ensuring the overall longitudinal strength meets design requirements, the control loads related to the strength of transverse members should also be given special consideration during the initial design phase, especially torque. Torque is obtained by integrating along the transverse section circumferentially, and it will exhibit different characteristics under different loading conditions and sea states. Because the transverse force is mainly the uniformly distributed pressure of ballast water under different loading conditions, the design torque value is proportional to the square of the beam. Therefore, to reduce the torque level, the beam should be limited as much as possible during the design phase.

[0038] The design is illustrated using an example of a wind turbine with nine blades (13) measuring 120m in length and a maximum width of 5m, and three turbine legs (12) with a diameter of 6.5 meters. The cross-section of the design is shown below. Figure 5 As shown.

[0039] Figure 6 The structural features of the under-deck trusses are shown. Figure 6In the middle, solid wood is placed between the large elbow plates to transfer the lateral load through deformation, thus avoiding stress concentration of small steel sections at this point.

[0040] Firstly, regarding the design of the longitudinal wall spacing, based on the designed leg 12 dimension of 6.5m, the distance between the starboard outer plating 5 and the mid-longitudinal wall 8 is determined to be 13.8m, and the distance between the mid-longitudinal wall 8 and the inner wall 7 is 7.3m. Then, based on the engine dimensions, the distance from the inner wall 7 to the port outer plating 5 is determined to be 3.9m. The overhang structure is mainly determined based on the width of the blade 13. Since the blade 13 width is 5m in this example, and the effective width in contact with the ground is approximately 4m, the width of the overhang structure on both sides of the hull is designed to be 3.9m under the constraint of limiting the ship's beam.

[0041] Regarding the deck height design, the main consideration from the highest working deck 1 to the main deck 2 is the stability of the wind turbine blade 13 support structure. In this example, since there are 3 rows of 9 blades 13, ensuring that the center of gravity of the bottommost blade 13 is within the height of the working deck 1 is considered to ensure the stability of the blade 13 support structure. Therefore, the distance from the working deck 1 to the main deck 2 is 3.5m. The height design factors between the main deck 2 and the inner bottom 4 mainly consider the girder web required for the main deck 2 span, excluding the required clearance height of 6.5m for the pile legs 12. The height is 0.4m, and the effective height of the positioning pads of the pile legs 12 on the inner bottom 4 is also taken into account. Therefore, the height between the main deck 2 and the inner bottom 4 is designed to be 8m. The floor height design of the partial platform 3 mainly considers the height requirement of the truss on the back of the partial platform 3, which is 0.6m, because it is necessary to avoid interference with the pile legs 12. At the same time, the position of the truss should also be considered to meet the size requirements of the generator after deducting the height of the truss. The double bottom height is mainly considered based on the capacity requirements of the ballast water, fuel oil, fresh water tanks and other compartments. In this example, the double bottom height is designed to be 2m.

[0042] according to Figure 3 The typical cross-section shown is used for verification. For example... Figure 7 As shown, compartment A is a liquid tank, including ballast water tanks, fresh water tanks, and fuel oil tanks, with liquid densities set according to ballast water tank standards. Compartment B is a cargo hold. Considering the loads on blade 13 on the overhanging structure, the loads on the blade 13 racks on main deck 2, and the uniformly distributed loads on the pile legs 12 on the inner bottom 4, under the condition that all liquid tanks are fully loaded, the strength of the structure is verified by applying the net water load results obtained from the specifications and wave load calculations. The obtained stress results for the plate frame and skeleton are as follows: Figure 8 as well as Figure 9 As shown.

[0043] Specifically, the present invention includes a structural profile design method for a ship type that can accommodate the transportation of wind turbine legs 12 and wind turbine blades 13, and a feasible structural design based on the method; the hull structure obtained by the design method is a fully continuous structure, without transverse bulkheads, pillars, or typical strong frame structures; the fully continuous structure is a continuous structure from the stern end plate of the main hull to the foremost point of the bow; the typical structure in the longitudinal direction includes a working deck 1, a main deck 2, a partial platform 3, an inner bottom 4, an outer plating 5, an inner wall I, an inner wall II, a mid-longitudinal wall 8, and an outward-flaring structure; the typical structure in the transverse direction includes a large elbow plate structure, a common beam structure, and a rib plate structure between the inner bottom 4.

[0044] When the transverse strength requirements of a ship are met without transverse bulkheads, pillars, or typical strong frame structures, the main reliance is on transverse large elbow plate structures. Additionally, the ship's length, beam, and depth are reduced. The large elbow plate structure is a discontinuous structure in the transverse direction, which includes both horizontal and vertical directions. A discontinuous transverse structure is one in which the dimensions of the components differ significantly, specifically referring to a hull structure with discontinuous structural strength.

[0045] The working deck 1 has a large opening for storing the wind turbine blade support 15.

[0046] The main deck 2, inner bottom 4, and outer plate 5 are a continuous structure. The inner bottom 4 is provided with an elbow plate for positioning the legs 12, and there is an elastic pad on the elbow plate to fit the outer diameter of the legs 12 of various diameters.

[0047] The mid-longitudinal bulkhead 8 is determined based on the dimensions of the leg 12, not the transverse center of the hull. The method for determining the transverse position of the mid-longitudinal bulkhead 8 is to deduct the space required for the largest designed leg 12, and to ensure that the web height of the girder is not less than the span between the main deck 2 and the inner bottom 4. However, in order to reasonably control the beam, the span of the mid-longitudinal bulkhead 8 does not need to be too large. The structural specifications of the longitudinal reinforcing girder below the main deck 2 are determined based on the span between the mid-longitudinal bulkhead 8 below the main deck 2 and the starboard side outer plating 10. The positioning position of the longitudinal girder is determined based on the L-shaped positioning pin position of the wind turbine blade 13 bracket. Other longitudinal reinforcing girder below the main deck 2 is distributed according to the equidistant rib spacing. The height h of the inner bottom 4 is determined based on the loading conditions.

[0048] The width of the cantilever structure is determined based on the effective width in contact with the blade 13, and in order to limit the ship's width, the width of the cantilever structure is based on not affecting the reliability of the transmission of the blade 13.

[0049] The height of the local platform 3, after deducting the height of the truss web, meets the size requirements of the generator for the generator configuration; the height of the truss web on the other side where the local platform 3 connects to the inner wall 7 meets the requirements of the local structural strength for the truss web height without interfering with the maximum design value of the pile leg 12 diameter.

[0050] One side of Inner Wall I contains ballast water tanks and a generator room and engine room separated by the platform. The other side of Inner Wall I contains a bulk cargo tank for mounting the pile legs 12. Inner Wall I is discontinuous in the equipment compartment area to avoid participating in longitudinal bending. The discontinuity in the equipment compartment area specifically refers to strength discontinuity, that is, there is an intermittent structure in the hull material. For compartments with watertight requirements, other watertight methods can be used to achieve this. The width B2 of the local compartment enclosed between Inner Wall I and the outer side plating 5 is determined based on the size of the control motor of the piling system and the required web height for the structural strength of the compartment. The pressure imbalance on both sides of Inner Wall I causes Inner Wall 7 to bear a large shear force. Therefore, the plate thickness and reinforcement specifications of Inner Wall 7 are determined according to the design loading calculations under typical shear force conditions.

[0051] A typical structure meets the strength requirements of existing specifications for cross-sectional design; the length of leg 12 is L0 / m, the diameter of leg 12 is D0 / m, and according to loading requirements, the ballast water volume of the forepeak tank is V0 / m³. 3 The width of the cargo hold area B1 is B1≥3D0+0.8, the beam B is B=B1+B2, and the length L is L≥L0+V0 / (B×h); ordinary beams are set every 4 rib spacings, with each rib spacing being 0.6m, and the beam web height not exceeding 0.3m; large elbow plate structures are set every 20 rib spacings, with the large elbow plates distributed in the cargo hold and located at the four corners of the space enclosed by the leg 12 and the cargo hold bulkhead, with the four corner positions located below the main deck 2 and above the inner bottom 4, respectively; the distance between the free edge of the large elbow plate located below the main deck 2 and the outer diameter of the leg 12 does not exceed 350mm.

[0052] The large elbow plate has openings at the pipe crossing locations, and the elbow plate structure is without openings at the locations where no pipes cross; a solid wooden block is set between the two longitudinal ribs below the main deck 2, which is closest to the pile leg 12; the longitudinal dimension of the solid wooden block is the beam spacing, the transverse dimension is the longitudinal rib spacing, and the height is the longitudinal rib height.

[0053] The two large elbow plate structures above the inner bottom 4 have a slot in the middle, the width of which is less than the diameter of the pile leg 12 to be transported; the height between the working deck 1 and the main deck 2 is determined according to the height of the bottommost blade 13 on the blade support 15 from the main deck 2 and the number of blade 13 layers; the blade 13 does not exceed 3 layers; the height between the working deck 1 and the main deck 2 is not less than 2 / 3 of the height of the central axis of the bottommost blade 13 from the main deck 2; the bulkhead on the side of the large opening of the working deck 1 is aligned with the center longitudinal bulkhead 8; the inner wall II opposite to the working deck 1 is determined according to the position of the center longitudinal bulkhead 8 and the width of the blade support 15; the width of the installed blade 13 is 5 meters, and the width of the outward-flaring structure is 3.9 meters; the blade 13 is placed at an angle on the support, the blade support 15 is 11.2 meters wide, and the width of the large opening is 12 meters; the space enclosed between the center longitudinal bulkhead 8 below the working deck 1 and the side is supported by pillars, which are set every 20 rows and are aligned with the inner wall I.

[0054] In addition, the present invention also includes a pile-holding system;

[0055] The piling system is controlled by the engine, which enables the piling system to rotate. The engine is located on the inner bottom 4, and the generator is located on the main deck 2. A base is set below the engine. The base panels are on the same plane and the ends are not enlarged, thereby reducing the beam of the ship. The base is welded along the inner wall I, the inner bottom 4, and the side of the ship. The base panels are beveled at the contact points with the outer side plate 5 and the inner wall I. The piling legs 12 that can be loaded have a diameter D0≤10m and a length L0≤100m.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A structural design method for a wind power equipment installation and transportation vessel, characterized in that, From top to bottom, the structure consists of a working deck (1), a main deck (2), a partial platform (3), an inner bottom (4), and an outer plating (5). A continuous longitudinal wall (8) and an inner wall (7) are provided between the working deck (1) and the outer plating (5). The longitudinal wall (8) is determined according to the leg dimensions and is not located at the center of the hull. The main deck (2), the inner bottom (4), the outer plating (5), and the longitudinal wall (8) are continuous structures that bear the overall longitudinal strength. The working deck (1), the partial platform (3), and the inner wall (7) are partial structures that do not bear the overall longitudinal strength. The compartment enclosed between the main deck and the inner bottom is the cargo hold. The cargo hold is a fully continuous structure from the bow to the stern of the hull. The ship's transverse structure is a hull structure with discontinuous structural strength. The discontinuous strength includes the absence of transverse bulkheads, pillars, and typical strong frame structures. The typical strong frame structure is a hull reinforcement structure with continuous structural strength. From port to starboard, the main component plates are the port side outer plate (6), inner wall (7), center longitudinal wall (8), working deck lower bulkhead (9), and starboard side outer plate (10); there is also a side flare structure (11). The method for determining the transverse position of the center longitudinal wall (8) is to deduct the space required for the maximum design leg size and take the requirement of not less than the height of the girder web plate height of the floor span from the main deck to the inner bottom as the design principle. The width of the flare structure is determined according to the effective width of the contact blade. In order to limit the ship's width, the width of the flare structure is based on not affecting the reliability of the blade transmission. From port to starboard, the secondary component plates are divided into large elbow plate support structure, ordinary beam structure, and rib plate structure between the inner bottom. The large elbow plate support structure is located below the main deck and the free side is arc-shaped. A large elbow plate for positioning legs (12) is provided on the inner bottom (4), and the height of the inner bottom is... Based on the loading conditions, an elastic pad is provided on the large elbow plate to accommodate the outer diameter of the pile legs (12) of various diameters. The length of the pile leg The distance between the free edge of the large elbow plate and the outer diameter of the pile leg (12) does not exceed 350mm; the width of the installed blade (13) is 5 meters, and the width of the outward-flaring structure is 3.9 meters; the blade (13) is placed at an angle on the support, the blade support (15) is 11.2 meters wide, and the working deck (1) has a large opening on one side of the hull, the width of which is 12 meters; The inner wall (7) is discontinuous in the equipment compartment area. The discontinuity specifically refers to the discontinuity of strength, that is, the hull material has an intermittent structure. For compartments with watertight requirements, watertightness can be achieved through other means. One side of the inner wall (7) is a ballast water tank and a generator compartment and an engine compartment separated by the platform. The other side of the inner wall (7) is a cargo compartment for placing the pile legs. The pressure on both sides of the inner wall (7) is unbalanced, resulting in the inner wall bearing a large shear force. The thickness of the inner wall plate and the reinforcement specifications of the skeleton are determined according to the design loading calculation of typical shear force conditions. The width of the local compartment enclosed between the inner wall and the outer plate of the side is... The size of the control motor of the jacking system and the required web height for the structural strength of the cabin are determined according to the size of the control motor of the jacking system. The jacking system is set in the enclosed space formed by the inner wall (7) and the local platform (3) and the main hull. The jacking system is controlled by the engine to realize the rotation of the jacking system. The height of the girder web on the other side of the connection between the local platform (3) and the inner wall (7) meets the requirements of the local strength for the girder web height without interfering with the maximum design value of the pile leg diameter. The engine is arranged on the inner bottom (4). A base is set below the engine. The base panel is on the same plane and the end is not enlarged to control the ship's width. The base is welded along the inner wall (7), the inner bottom (4) and the side of the ship. The base panel is beveled at the contact position of the outer plate of the side of the ship and the contact position of the inner wall (7). The generator is arranged on the main deck (2).

2. According to the structural design method of a wind power equipment installation and transportation vessel as described in claim 1, the large opening is used to store the blade support (15), the cabin space enclosed between the working deck and the main deck is supported by pillars, the pillars are set every 20 rows, and the pillars are aligned with the inner wall (7), the height between the working deck and the main deck is determined according to the height of the bottommost blade on the blade support from the main deck and the number of blade layers, and is not less than 2 / 3 of the distance between the center axis of the bottommost blade and the main deck, the blades do not exceed 3 layers, the main deck is provided with a pin above the opening side, the pin is an L-shaped pin (14), the L-shaped pin is used to fix the blade support (15); the longitudinal reinforcing truss structure under the main deck is determined according to the span from the middle longitudinal wall under the main deck to the farthest adjacent bulkhead, the positioning position of the longitudinal truss is determined according to the position of the L-shaped pin (14), and the longitudinal reinforcing truss under the main deck is distributed according to the equidistant rib spacing.

3. The structural design method for a wind power equipment installation and transportation vessel according to claim 1, characterized in that, By using the large elbow plate support structure, the method of reducing the hull shape value is used to ensure the lateral strength of the hull in the absence of transverse bulkheads, pillars, and typical strong frame structures.

4. The structural design method for a wind power equipment installation and transportation vessel according to claim 1, characterized in that, The length of the pile leg (12) is The diameter of the pile leg (12) is The ballast water volume of the foremost compartment is Then the width of the cargo hold area for , boat width for ,captain for .

5. The structural design method for a wind power equipment installation and transportation vessel according to claim 1, characterized in that, Ordinary crossbeams are set with 4 rib spacings, each rib spacing is 0.6m, and the web height of the crossbeam does not exceed 0.3m; The large elbow plate structure includes the large elbow plate support structure and the large elbow plate. The large elbow plate structure is set every 20 segments. The large elbow plate structure is distributed in the cargo hold and is located at the four corners of the space enclosed by the pile leg (12) and the cargo hold wall. The four corners are located below the main deck (2) and above the inner bottom (4), respectively.

6. The structural design method for a wind power equipment installation and transportation vessel according to claim 4, characterized in that, The large elbow plate has an opening at the pipe crossing position, and the elbow plate structure without opening is used at the position where no pipe crosses; a solid wooden block is set between the two longitudinal bones below the main deck (2) where the distance between the main deck (2) and the pile leg (12) is the closest; the longitudinal dimension of the solid wooden block is the beam spacing, the transverse dimension is the longitudinal bone spacing, and the height is the longitudinal bone height; a slot is provided between the two large elbow plate structures above the inner bottom (4), and the width of the slot is smaller than the diameter of the pile leg (12) to be transported.

7. The structural design method for a wind power equipment installation and transportation vessel according to claim 5, characterized in that, The blades (13) do not exceed 3 layers; the height between the working deck (1) and the main deck (2) is not less than 2 / 3 of the distance between the central axis of the lowest blade (13) and the main deck (2); the bulkhead on the side of the large opening of the working deck (1) is aligned with the central longitudinal bulkhead (8); the space enclosed between the central longitudinal bulkhead (8) below the working deck (1) and the side is supported by pillars, with pillars set every 20 rows, and the pillars are aligned with the inner wall.

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