Foundation structure of an offshore wind turbine with damping function

Abstract

The application discloses a foundation structure of offshore wind generator with damping function, which comprises a foundation platform, the bottom of the foundation platform is fixedly provided with an underwater double-layer nested pile foundation mechanism, and the surface of the foundation platform is fixedly installed with a floating bearing mechanism; a floating damping mechanism is installed above the floating bearing mechanism, and the upper side of the floating damping mechanism is fixedly connected with a wind generator tower; the bottom of the wind generator tower is arranged on the foundation platform through the floating damping mechanism and the floating bearing mechanism. The foundation structure of offshore wind generator with damping function can effectively absorb and dissipate vibration energy by the elastic deformation of the damping core sleeve, can provide excellent buffering and damping effect for the high tower, and can significantly reduce the structural fatigue; the self-adaptive leveling floating support is jointly formed by the floating bearing mechanism and the floating damping mechanism, and forms the floating foundation of the system; and the normal use of the offshore wind generator is ensured, and collapse does not occur.

Description

TECHNICAL FIELD

[0001] The application relates to the field of building construction equipment, in particular to a foundation structure of an offshore wind turbine with a damping function. BACKGROUND

[0002] The offshore wind turbine is a power equipment for converting wind energy into mechanical work, rotating the rotor, and finally outputting alternating current, which is composed of a wind turbine, a charger and a digital inverter, wherein the wind turbine is composed of a nose, a rotating body, a tail wing and blades, the blades are used to receive wind power and convert it into electric energy through the nose, the tail wing makes the blades always face the direction of the incoming wind to obtain the maximum wind energy, the rotating body enables the nose to rotate flexibly to realize the function of adjusting the direction of the tail wing, the rotor of the nose is a permanent magnet, and the stator winding cuts the magnetic lines to generate electric energy; the existing offshore wind turbine has some defects, the air humidity on the sea is high, the salt content is high, the blades will be wet when the rainy season comes, the machine box is easy to be corroded, and in addition, when the wind turbine is blown down by a strong typhoon, the turbine cannot be floated to the sea level in time, thereby reducing the degree of seawater erosion.

[0003] In order to solve the above problems, through retrieval, a China patent with the publication number CN213175933U discloses a kind of offshore wind turbine moisture-proof device, which includes base, the upper end of the base is fixedly connected with tower, the surface of the tower is penetrated with cross bar, the surface of the cross bar is provided with buoyancy ring on the both sides of the tower, the top of the tower is provided with motor box, the one end of the motor box is provided with wind deflector, the other end of the motor box is connected with tail box, the surface of the wind deflector is provided with blade, the surface of the one end of the tail box is penetrated with tail rod, the surface of the tail rod is provided with tail wing.

[0004] Although the above-mentioned device can prevent moisture and increase the overall buoyancy of the motor, in actual use, especially when installing the offshore wind turbine in the offshore and shallow sea, the bottom of the tower column of the offshore wind turbine is fixed on the pile foundation inserted into the seabed, and when the offshore wind turbine works on the sea, the periodic impact of sea waves, the turbulent vibration of sea wind and the mechanical vibration of the generator during operation, such as blade rotation imbalance and gear box operation impact, will continuously generate vibration energy. Since there is no damping mechanism between the bottom of the tower column and the pile foundation, these vibrations will be directly transmitted to the connection parts of the tower column and the pile foundation, such as flange, weld and pile foundation body, which will cause the connection node to bear alternating stress for a long time, easily causing fatigue damage such as weld cracking, bolt loosening or pile foundation concrete cracking, thereby affecting the normal use of the offshore wind turbine, and even causing collapse. SUMMARY

[0005] The purpose of the present application is to provide a foundation structure of an offshore wind turbine with a damping function to solve the defects mentioned in the background.

[0006] In order to achieve the above object, the application provides a foundation structure of offshore wind turbine with damping function, which comprises a foundation platform, the bottom of the foundation platform is fixedly provided with an underwater double-layer nested pile foundation mechanism, and the surface of the foundation platform is fixedly installed with a floating bearing mechanism; a floating damping mechanism is installed above the floating bearing mechanism, and the upper side of the floating damping mechanism is fixedly connected with a wind turbine tower; the bottom of the wind turbine tower is arranged on the foundation platform through the floating damping mechanism and the floating bearing mechanism, and the bottom of the wind turbine tower is fixedly provided with a tower base, and a plurality of groups of perforations are equidistantly arranged on the annular surface of the tower base; the top of the underwater double-layer nested pile foundation mechanism is fixedly provided with a pile foundation base, and the bottom center of the pile foundation base is provided with a center pile foundation, and the outer side of the bottom of the pile foundation base is equidistantly installed with five groups of edge pile foundations.

[0007] As an improvement of the above scheme, the underwater double-layer nested pile foundation mechanism comprises a pile foundation base, a center pile foundation, an edge pile foundation, an outer side reinforcing frame and an inner side reinforcing frame, the bottom of the edge pile foundation is inclined away from the pile foundation base, and the outer annular surface of the edge pile foundation is fixedly provided with an outer side reinforcing frame; the outer side reinforcing frame is fixed between two adjacent groups of edge pile foundations, and the outer side reinforcing frame is composed of five groups of parallel arranged horizontal rods and one group of vertical pipes.

[0008] As an improvement of the above scheme, the five groups of edge pile foundations are in a central symmetric structure, the top of the edge pile foundation is fixedly connected with the pile foundation base, and the inner side of the edge pile foundation is fixedly connected with the inner side reinforcing frame; the end of the inner side reinforcing frame away from the edge pile foundation is fixedly connected to the outer annular surface of the center pile foundation, and the outer annular surface of the center pile foundation is equidistantly provided with five groups of inner side reinforcing frames; the center pile foundation is fixedly connected with the five groups of edge pile foundations through the five groups of outer inner side reinforcing frames.

[0009] As an improvement of the above scheme, the center pile foundation and the edge pile foundation have the same structure, and the top of the center pile foundation is fixedly connected with the pile foundation base; the center pile foundation comprises an outer pile foundation cylinder, an inner pile foundation rod, a pointed end and an auxiliary welding sealing plug, the outer pile foundation cylinder is fixedly connected to the bottom of the pile foundation base, and the inner pile foundation rod is inserted into the inner part of the outer pile foundation cylinder; one end of the inner pile foundation rod is fixedly provided with a pointed end in a conical shape, and the other end of the inner pile foundation rod is welded with an auxiliary welding sealing plug in a cylindrical shape; a filling space is formed between the inner pile foundation rod and the outer pile foundation cylinder, the inner pile foundation rod passes through the inner part of the outer pile foundation cylinder, and the auxiliary welding sealing plug at the top of the inner pile foundation rod is welded and fixed to the upper side of the inner part of the outer pile foundation cylinder.

[0010] As the improvement of the above-mentioned scheme, the floating bearing mechanism comprises a base, a stable platform, an L-shaped frame, a cushion seat, a stud A, a center platform, a reinforcing seat, a bearing platform and a stud B, the base is circular, a plurality of groups of through holes are equidistantly arranged on the surface of the base, and the stud A is inserted into the through hole; the stud A passes through the through hole and is fixed by a nut, and the bottom of the stud A is fixedly connected with a pile foundation platform; a center pile foundation is fixedly arranged in the middle of the base, a plurality of groups of L-shaped frames are equidistantly fixed to the outer ring surface of the center pile foundation, and the top of the center pile foundation is fixedly connected with a center platform; the center platform is a regular hexagon, a reinforcing seat is fixedly arranged on each of the six side surfaces of the center platform, and the bottom of the reinforcing seat is fixedly connected with a stable platform; a plurality of groups of circular holes matched with the size of the stud A are equidistantly arranged on the cushion seat, and the bottom of the cushion seat is equidistantly provided with eight groups of quick-connection seats; eight groups of quick-connection grooves are equidistantly arranged on the surface of the base, the size of the quick-connection grooves is matched with the size of the quick-connection seats, the quick-connection seats are inserted into the quick-connection grooves, and the cushion seat is annular and covers the surface of the base and is fixed by the stud A and the nut.

[0011] As the improvement of the above-mentioned scheme, the bearing platform is arranged on the six side surfaces of the center platform, the surface of the bearing platform is fixedly connected with a circular lock cover, a spherical buffer groove is arranged in the bearing platform, the bottom of the stud B is fixedly connected with an adapter ball matched with the size of the buffer groove, the outer side of the adapter ball is fixedly connected with a rubber gasket, and the adapter ball is movably connected in the buffer groove through the rubber gasket.

[0012] As the improvement of the above-mentioned scheme, the center platform comprises a damping space, a butt joint groove, a damping core sleeve, a butt joint strip, a damping column, a stabilizing hole and a stabilizing column, the damping space is arranged in the center platform, six groups of stabilizing columns are equidistantly fixed to the inner corners of the damping space, and the damping core sleeve is inserted into the damping space, the outer corners of the damping core sleeve are fixedly connected with six groups of butt joint strips, and the inner side of the damping core sleeve is equidistantly provided with damping columns, the inner side of the damping column is provided with a stabilizing hole matched with the size of the stabilizing column, and six groups of stabilizing columns are respectively inserted into the stabilizing holes arranged in the six groups of damping columns; a plurality of groups of butt joint grooves are equidistantly arranged in the inner side of the center platform, the size of the butt joint grooves is matched with the size of the butt joint strips, the butt joint strips are inserted into the butt joint grooves, and the butt joint grooves and the butt joint strips are dovetail-shaped; the damping core sleeve is positioned and installed in the damping space by a plurality of groups of quick-connection grooves and the butt joint strips; damping channels are formed between the two adjacent groups of damping columns, the damping channels are inserted with an intermediate seat, and a floating damping mechanism is arranged above the intermediate seat.

[0013] As the improvement of the above-mentioned scheme, the floating damping mechanism comprises an intermediate plate, a stud C, a rubber seat, an annular gasket, a tower base, a clamping groove, a pressing table, a butt joint seat and a core floating table, the pressing table is internally fixedly connected with the core floating table, and the surface is fixedly connected with the intermediate plate, the outer side of the core floating table is equidistantly provided with six groups of intermediate seats, and the core floating table is a columnar structure made of metal material, and the outer side of the core floating table is elastically connected with the center table through a damping core sleeve.

[0014] As the improvement of the above-mentioned scheme, the bottom of the pressing table is equidistantly provided with six groups of butt joint seats, and a through hole is formed in the butt joint seat, and a stud B is inserted into the through hole.

[0015] As the improvement of the above-mentioned scheme, the pressing table and the circular intermediate plate on the surface thereof are concentric structures, a plurality of groups of studs C are equidistantly mounted on the outer side of the surface of the intermediate plate, the bottom of each stud C is fixedly connected with a cylindrical rubber seat, a plurality of groups of mounting holes are equidistantly formed in the annular gasket and the tower base, and a clamping groove is formed in the bottom of the mounting hole on the tower base; the clamping groove is clamped on the outer side of the rubber seat, and the stud C passes through the annular gasket and the tower base in sequence and is screw-connected with a nut.

[0016] Compared with the prior art, the beneficial effects of the present application are:

[0017] 1. When the wind turbine tower shakes in any direction due to sea wind, the core floating table can squeeze the damping core sleeve around it in all directions; through the elastic deformation of the damping core sleeve itself, the vibration energy can be effectively absorbed and dissipated, providing excellent buffering and damping effect for the high-rise tower, significantly reducing structural fatigue; the self-adaptive floating support is composed of the floating bearing mechanism and the floating damping mechanism, forming a floating foundation of the system; ensuring the normal use of the offshore wind turbine, and avoiding collapse;

[0018] 2. The bottom of the stud B is connected with the spherical surface of the bearing table through the spherical surface, and the upper structure has a certain degree of freedom; when the tower base and the tower are shaken by external force, they can be slightly self-adaptively adjusted and displaced, rather than being rigidly resisted, so that the shaking amplitude can be better adapted, and stress concentration can be avoided; stable and uniform load distribution, six groups of butt joint seats are equidistantly arranged on the bearing table, and the symmetric layout ensures that the huge vertical pressure and overturning moment from the tower can be uniformly dispersed and transmitted to the foundation table and the underwater double-nested pile foundation mechanism below, avoiding local overload and enhancing the stability and reliability of the whole support system;

[0019] 3. The scheme is adapted in size to the docking groove and the docking strip by equidistantly opening a plurality of groups of docking grooves on the inner side of the center platform, and the docking strip is inserted into the docking groove, and the unique dovetail design greatly increases the contact area and friction between the two; when the wind turbine tower shakes and generates force, the dovetail-shaped docking structure can better resist shear force and prevent the damping core sleeve from displacing in the damping space, further ensuring the stability of the entire structure; at the same time, this design makes the positioning of the damping core sleeve in the damping space more accurate, ensuring that it can accurately buffer the vibration of the wind turbine tower;

[0020] 4. When the wind turbine tower shakes, the vibration energy is transmitted to the damping channel through the intermediate seat, and the special structure and damping column components in the damping channel can absorb, disperse and buffer the vibration energy multiple times, combined with the synergistic effect of the floating damping mechanism, greatly reducing the vibration amplitude transmitted to the wind turbine tower, effectively protecting the wind turbine tower and internal equipment, prolonging its service life, and ensuring the stable operation of the wind turbine in the shallow sea area;

[0021] 5. The scheme improves the buffering and damping performance by equidistantly installing a plurality of groups of studs C on the outer side of the surface of the intermediate plate, in cooperation with the cylindrical rubber seat fixed at the bottom; when the wind turbine tower is impacted by sea wind and vibrates, the rubber seat can effectively absorb and disperse vibration energy due to its good elasticity, like the rubber buffer pad in the car shock absorber, reducing the impact of vibration on the tower base and the entire structure, prolonging the service life of the equipment, and ensuring the stable operation of the wind turbine in complex marine environment;

[0022] 6. The scheme forms a group pile foundation by deeply inserting the center pile foundation, five groups of edge pile foundations and the internal inner pile foundation rod into the seabed respectively; effectively increasing the contact area of the structure and the seabed, thereby providing vertical bearing capacity to support the huge weight of the entire wind turbine tower, improving the horizontal load resistance capacity, such as resisting overturning moment caused by wind and wave impact, effectively improving the overall stability; significantly strengthening and toughening effect;

[0023] 7. The scheme further punches the inner pile foundation rod into the center pile foundation and the edge pile foundation, which is equivalent to adding a skeleton to the main pile foundation; the double-layer nested insertion structure greatly enhances the stiffness and bending resistance of a single pile foundation, enabling it to more effectively resist deformation caused by long-term loads such as seabed ocean currents and soil creep, making the overall structure more solid and durable, and improving the anti-seismic and anti-fatigue performance. BRIEF DESCRIPTION OF DRAWINGS

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a front view schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a bottom view of the structure of the present invention;

[0027] Figure 3 This is a top view of the structure of the present invention;

[0028] Figure 4 This is a rear view of the structure of the present invention;

[0029] Figure 5 This is a schematic diagram of the assembled structure of the present invention;

[0030] Figure 6 The structure of this invention Figure 5 Top view;

[0031] Figure 7 This is a schematic diagram of the floating load-bearing mechanism, the floating vibration reduction mechanism, and the wind turbine tower structure of the present invention;

[0032] Figure 8 The structure of this invention Figure 7 A bottom view;

[0033] Figure 9 The structure of this invention Figure 7 Cross-sectional view;

[0034] Figure 10 The structure of this invention Figure 9 Rear view;

[0035] Figure 11 The structure of this invention Figure 9 Side view;

[0036] Figure 12 This is a schematic diagram of the floating load-bearing mechanism of the present invention;

[0037] Figure 13 This is a rear view of the floating load-bearing mechanism of the present invention;

[0038] Figure 14 This is a schematic diagram of the external structure of the floating load-bearing mechanism of the present invention;

[0039] Figure 15 This is a schematic diagram of the core floating platform and its connecting structure of the present invention;

[0040] Figure 16 The top view of the wind turbine tower structure and its connecting structure of the present application;

[0041] Figure 17 The exploded view of the floating bearing mechanism of the present application;

[0042] Figure 18 The exploded side view of the floating bearing mechanism of the present application;

[0043] Figure 19 The schematic diagram of the underwater double-layer nested pile foundation mechanism of the present application;

[0044] Figure 20 The sectional view of the underwater double-layer nested pile foundation mechanism of the present application;

[0045] Figure 21 The schematic diagram of the central pile foundation structure of the present application.

[0046] FIG.

[0047] 100, base platform; 200, underwater double-layer nested pile foundation mechanism; 21, pile foundation platform; 22, central pile foundation; 221, outer pile foundation cylinder; 222, inner pile foundation rod; 223, tip portion; 224, auxiliary welding sealing plug; 23, edge pile foundation; 24, outer side reinforcing frame; 25, inner side reinforcing frame; 300, floating bearing mechanism; 31, base; 32, stabilizing platform; 33, L-shaped frame; 34, cushion seat; 341, quick-connection seat; 342, quick-connection groove; 35, stud A; 36, central platform; 361, damping space; 362, abutting groove; 363, damping core sleeve; 364, abutting strip; 365, damping column; 366, stabilizing hole; 367, stabilizing column; 37, reinforcing seat; 38, bearing platform; 39, stud B; 391, adaptive ball; 392, rubber gasket; 393, lock cover; 400, floating damping mechanism; 41, intermediate plate; 42, stud C; 43, rubber seat; 44, annular gasket; 45, tower base platform; 451, clamping groove; 46, pressing platform; 47, abutting seat; 48, core floating platform; 481, intermediate seat; 500, wind turbine tower. DETAILED DESCRIPTION

[0048] Embodiments of the present application will be described below with reference to the accompanying drawings. EMBODIMENT

[0049] A foundation structure of an offshore wind turbine with damping function, as shown in Figures 1-6As shown, including the base station 100, the bottom of the base station 100 is fixedly provided with an underwater double-layer nested pile foundation mechanism 200, and the surface is fixedly installed with a floating bearing mechanism 300; the upper side of the floating bearing mechanism 300 is installed with a floating damping mechanism 400, and the upper side of the floating damping mechanism 400 is fixedly connected with a wind turbine tower 500; the bottom of the wind turbine tower 500 is erected on the base station 100 through the floating damping mechanism 400 and the floating bearing mechanism 300, and the bottom is fixedly provided with a tower base 45, and a plurality of groups of perforations are equidistantly arranged on the annular surface of the tower base 45; the top of the underwater double-layer nested pile foundation mechanism 200 is fixedly provided with a pile foundation base 21, and the bottom center position is provided with a center pile foundation 22, and the bottom outer side is equidistantly installed with five groups of edge pile foundations 23.

[0050] As shown in Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12 : the floating bearing mechanism 300 includes a base 31, a stabilizing table 32, an L-shaped frame 33, a pad seat 34, a stud A 35, a center table 36, a reinforcing seat 37, a bearing table 38 and a stud B 39, the base 31 is circular, and a plurality of groups of perforations are equidistantly arranged on the surface of the outer side, and the stud A 35 is inserted into the inside of the perforation; the stud A 35 passes through the perforation and is fixed by a nut, and the bottom is fixedly connected with the pile foundation base 21; the center pile foundation 22 is fixedly arranged in the middle of the base 31, a plurality of groups of L-shaped frames 33 are equidistantly fixedly connected on the outer annular surface of the center pile foundation 22, and the top is fixedly connected with the center table 36; the center table 36 is a regular hexagon, and a reinforcing seat 37 is fixedly arranged on each of the six side surfaces, and the bottom of the reinforcing seat 37 is fixedly connected with the stabilizing table 32; a plurality of groups of circular holes matched with the size of the stud A 35 are equidistantly arranged on the pad seat 34, and eight groups of quick-connection seats 341 are equidistantly arranged on the bottom, eight groups of quick-connection grooves 342 are equidistantly arranged on the surface of the base 31, the size of the quick-connection groove 342 is matched with that of the quick-connection seat 341, the quick-connection seat 341 is inserted into the inside of the quick-connection groove 342, the pad seat 34 is annular, and it covers the surface of the base 31 and is fixed by the stud A 35 and the nut.

[0051] As shown in Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12As shown: the bearing table 38 is provided with six groups of fixed connection on the six sides of the center table 36, and the surface is screwed with a circular lock cover 393, and the inside is provided with a spherical buffer groove, the bottom of the stud B39 is fixedly connected with an adapter ball 391, and the size of the adapter ball 391 is matched with the buffer groove, the outside of the adapter ball 391 is fixedly connected with a rubber pad 392, and it is movably connected in the buffer groove through the rubber pad 392 on the outside.

[0052] As shown in Figure 13 , Figure 14 , Figure 15 , Figure 16 , Figure 17 and Figure 18 : the center table 36 includes damping space 361, butt joint groove 362, damping core sleeve 363, butt joint strip 364, damping column 365, stabilizing hole 366 and stabilizing column 367, the damping space 361 is arranged inside the center table 36, and six groups of stabilizing columns 367 are fixedly connected at equal intervals at the inside corners, and the damping core sleeve 363 is inserted therein, the outside corners of the damping core sleeve 363 are fixedly connected with six groups of butt joint strips 364, and the damping columns 365 are arranged at equal intervals on the inside, the stabilizing holes 366 are arranged in the inside of the damping columns 365, and the size of the stabilizing holes 366 is matched with the stabilizing columns 367, and the six groups of stabilizing columns 367 are respectively inserted into the stabilizing holes 366 arranged in the inside of the six groups of damping columns 365; a plurality of butt joint grooves 362 are also arranged at equal intervals on the inside of the center table 36, and the size of the butt joint groove 362 is matched with the butt joint strip 364, and the butt joint strip 364 is inserted into the inside of the butt joint groove 362, and the butt joint groove 362 and the butt joint strip 364 are both dovetail-shaped; the damping core sleeve 363 is positioned and installed in the inside of the damping space 361 through a plurality of quick connection grooves 342 and the butt joint strips 364; damping channels are formed between the two adjacent groups of damping columns 365, and the intermediate seats 481 are inserted into the inside of the damping channels, and the floating damping mechanism 400 is installed above the damping channels.

[0053] As shown in Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14 : the floating damping mechanism 400 includes an intermediate plate 41, a stud C42, a rubber seat 43, an annular gasket 44, a tower base 45, a clamping groove 451, a pressing table 46, a butt joint seat 47 and a core floating table 48, the pressing table 46 is fixedly connected with the core floating table 48 in the inside, and the surface is fixedly connected with the intermediate plate 41, the outside of the core floating table 48 is fixedly provided with six groups of intermediate seats 481, and the core floating table 48 is a columnar structure made of metal material, and the outside of the core floating table 48 is elastically connected with the center table 36 through the damping core sleeve 363.

[0054] As shown in Figure 7 , Figure 8 and Figure 9 : the bottom of the press table 46 is equidistantly provided with six groups of butt joints 47, and the butt joints 47 are provided with through holes, and the inside of the through holes is inserted with studs B39, which pass through the circular butt joints 47 and are fixedly connected by nuts.

[0055] As shown in Figure 12 , Figure 13 , Figure 14 and Figure 15 : the press table 46 is in a concentric circle structure with the circular intermediate plate 41 on the surface thereof, and the surface of the intermediate plate 41 is equidistantly provided with a plurality of groups of studs C42, and the bottom of each stud C42 is fixedly connected with a cylindrical rubber seat 43, and a plurality of groups of mounting holes are equidistantly provided on the annular gasket 44 and the tower base 45, and the bottom of the mounting hole on the tower base 45 is provided with a clamping groove 451; the clamping groove 451 is clamped on the outside of the rubber seat 43, and the studs C42 pass through the annular gasket 44 and the tower base 45 in turn and are screw-connected with nuts.

[0056] In use, the wind turbine tower 500 is provided at the bottom with a tower base 45, the bottom of the tower base 45 is installed on the foundation platform 100 through the floating damping mechanism 400 and the floating bearing mechanism 300, the bottom of the foundation platform 100 is fixed and supported in the shallow sea through the underwater double nested pile foundation mechanism 200, the floating bearing mechanism 300 and the floating damping mechanism 400 are inserted into the damping core sleeve 363 inside the center platform 36 through the core floating platform 48, then the intermediate plate 41 is pressed downward to press the core floating platform 48 inside the damping core sleeve 363, at the same time, the butt joint seat 47 at the bottom outside of the intermediate plate 41 is screwed and fixed with the stud B39 on the bearing platform 38 outside the center platform 36, the butt joint seat 47 and the bearing platform 38 are provided with six groups of studs B39 at equal intervals, the adaptive ball 391 at the bottom of the stud B39 is movably arranged inside the bearing platform 38 and is limited by the lock cover 393; when the wind turbine tower 500 shakes due to the sea wind, the core floating platform 48 can extrude the damping core sleeve 363 inside the center platform 36 in any direction, the vibration suffered by the wind turbine tower 500 is buffered through the elastic deformation of the damping core sleeve 363, at the same time, the adaptive ball 391 at the bottom of the stud B39 can move inside the bearing platform 38 to adapt to the shaking amplitude of the wind turbine tower 500; the tower base 45 is installed on the foundation platform 100 through the floating damping mechanism 400 and the floating bearing mechanism 300 to form a stable support system; the bottom of the foundation platform 100 is firmly fixed in the shallow sea through the underwater double nested pile foundation mechanism 200, which greatly enhances the ability of the overall structure to resist the impact of sea wind and sea waves and ensures that the wind turbine tower 500 can also operate stably in a complex marine environment; in terms of damping and buffering performance, the core floating platform 48 is inserted into the damping core sleeve 363 inside the center platform 36 through the unique connection mode of the core floating platform 48 and the center platform 36, and the intermediate plate 41 presses the core floating platform 48 inside the damping core sleeve 363; when the wind turbine tower 500 shakes due to the sea wind, the core floating platform 48 can extrude the damping core sleeve 363 in any direction, effectively buffer the vibration by using the elastic deformation of the damping core sleeve 363, greatly reduce the damage of vibration to the tower and internal equipment, and prolong the service life of the equipment; the six groups of studs B39 provided at equal intervals between the butt joint seat 47 and the bearing platform 38 have the following advantages; the adaptive ball 391 at the bottom of the stud B39 can move inside the bearing platform 38 to flexibly adapt to the shaking amplitude of the wind turbine tower 500, further improve the adaptability of the structure under different wind conditions, ensure that the wind turbine can still operate safely and stably in severe environments such as strong wind, and protect the power generation efficiency and reliability;

[0057] Further: the cooperation of the core floating platform 48 and the damping core sleeve 363 is the key of the system; when the wind turbine tower 500 shakes in any direction due to sea wind, the core floating platform 48 can squeeze the damping core sleeve 363 around it in all directions; through the elastic deformation of the damping core sleeve 363 itself, it can effectively absorb and dissipate vibration energy, providing excellent buffering and damping effect for the high-rise wind turbine tower 500, significantly reducing structural fatigue; the self-adaptive leveling floating support, the floating bearing mechanism 300 and the floating damping mechanism 400 together constitute the floating foundation of the system; through the spherical surface movable connection of the bottom adapter ball 391 of the stud B39 and the bearing platform 38, the upper structure obtains a certain degree of freedom; so that the tower base 45 and the wind turbine tower 500 can make small adaptive adjustment and displacement when they are shaken by external force, rather than rigidly resist, so as to better adapt to the shaking amplitude and avoid stress concentration; stable and uniform load distribution, the docking seat 47 and the bearing platform 38 are equidistantly provided with six groups, and the symmetrical layout ensures that the huge vertical pressure and overturning moment from the wind turbine tower 500 can be uniformly dispersed and transmitted to the foundation platform 100 and the underwater double nested pile foundation mechanism 200 below, avoiding local overload and enhancing the stability and reliability of the entire support system; the rigid and flexible collaborative working mechanism skillfully combines rigid connection and flexible buffering; the interplate 41 presses the core floating platform 48 in the damping core sleeve 363 through the stud B39, providing the necessary initial stiffness and connection strength; while the movable design of the adapter ball 391 provides flexibility; the rigid and flexible combination design makes the system not only able to withstand huge static load, but also dynamically respond and weaken the dynamic load brought by wind and waves; enhance the durability in harsh marine environment; through the above comprehensive damping and adaptive mechanism, it can effectively isolate the violent vibration from the wind turbine tower 500 to the underwater double nested pile foundation mechanism 200, reduce the fatigue damage of long-term alternating stress on the concrete foundation platform 100 and the pile foundation, and help to prolong the service life of the entire wind turbine foundation structure in the corrosive and high dynamic load shallow sea environment; through the cooperation of the floating damping mechanism 400, the floating bearing mechanism 300, the core floating platform 48 and the damping core sleeve 363, and the adapter ball 391, an intelligent and multidirectional damping system is formed, which significantly improves the stability, adaptability and durability of the wind turbine tower 500 under complex wind and wave load;

[0058] As a further description of the above scheme: the outer side of the adapter ball 391 at the bottom of the stud B39 is wrapped with a rubber pad 392, the adapter ball 391 is movably arranged in the spherical buffer groove inside the bearing table 38 through the rubber pad 392 on the outer side, the side wall of the bearing table 38 is welded on the side wall of the center table 36, and the bottom of the bearing table 38 is welded and supported by the reinforcing seat 37; the rubber pad 392 has good elasticity and flexibility, like building an efficient buffer barrier between the adapter ball 391 and the bearing table 38; when the wind turbine tower 500 shakes due to the influence of sea wind, the rubber pad 392 can absorb a large amount of vibration energy during the movement of the adapter ball 391 in the spherical buffer groove, effectively reducing the impact of vibration on the stud B39 and the whole connecting structure, further improving the buffering effect of the wind turbine tower 500 vibration, and reducing the risk of damage to the structure due to frequent vibration; at the same time, the rubber pad 392 can also play a sealing role, which can prevent foreign matters such as seawater and dust from entering the spherical buffer groove inside the bearing table 38, avoid abnormal wear between the adapter ball 391 and the groove body due to the invasion of foreign matters, and prolong the service life of related components; the side wall of the bearing table 38 is welded on the side wall of the center table 36, and the bottom is welded and supported by the reinforcing seat 37, which greatly enhances the structural stability; the welded connection makes the bearing table 38 and the center table 36 form a firm whole, which can work better and bear various loads transmitted by the wind turbine tower 500 together; the welding support of the reinforcing seat 37 adds extra stable support to the bearing table 38, effectively disperses the pressure borne by the bearing table 38, improves the ability of the bearing table 38 to resist deformation and damage in complex marine environment, and ensures that the whole floating bearing mechanism 300 can continuously and stably provide reliable support for the wind turbine tower 500, ensuring the safe and efficient operation of the wind turbine in the shallow sea area;

[0059] The six groups of stabilizing columns 367 fixedly connected at equidistant corners inside the damping space 361 work in cooperation with the six groups of docking strips 364 fixedly connected at corners outside the damping core sleeve 363 and the damping columns 365 equidistantly arranged inside, greatly enhancing the stability of the overall structure; the stabilizing columns 367 are respectively inserted into the stabilizing holes 366 opened inside the damping columns 365, and this matching mode is just like installing firm positioning anchors for the damping core sleeve 363, ensuring that the damping core sleeve 363 will not deviate or excessively shake when the wind turbine tower 500 shakes due to the influence of sea wind, and always stably plays the role of buffering vibration; moreover, the adaptive design of the stabilizing columns 367 and the stabilizing holes 366 can also disperse the pressure borne by the damping core sleeve 363, making the stress more uniform and effectively improving the durability of the structure; secondly, the multiple groups of docking grooves 362 equidistantly opened inside the center platform 36 are in size adaptation with the docking strips 364 and are all dovetail-shaped, the docking strips 364 are inserted into the docking grooves 362, and the unique dovetail-shaped design greatly increases the contact area and friction force between the two; when the wind turbine tower 500 shakes to generate force, the dovetail-shaped docking structure can better resist shear force, preventing the damping core sleeve 363 from displacing inside the damping space 361, further guaranteeing the stability of the overall structure; at the same time, this design makes the positioning of the damping core sleeve 363 inside the damping space 361 more accurate, ensuring that it can accurately buffer the vibration of the wind turbine tower 500; furthermore, the damping core sleeve 363 is positioned and installed inside the damping space 361 through the multiple groups of quick connecting grooves 342 and the docking strips 364, which not only facilitates the installation and dismounting of the damping core sleeve 363, is beneficial to the later maintenance and replacement, but also can ensure that the position of the damping core sleeve 363 inside the damping space 361 is fixed and stable, guaranteeing that it can always efficiently play the function of buffering vibration under the complex marine environment and wind force; in addition, the damping channels formed between the two adjacent groups of damping columns 365, and the intermediate seat 481 and the floating damping mechanism 400 installed above inside, further optimize the damping effect; when the wind turbine tower 500 shakes, the vibration energy will be transmitted to the damping channels through the intermediate seat 481, and the special structure and components such as the damping columns 365 inside the damping channels can absorb, disperse and buffer the vibration energy multiple times, combined with the synergistic effect of the floating damping mechanism 400, greatly reducing the vibration amplitude transmitted to the wind turbine tower 500, effectively protecting the wind turbine tower 500 and the internal equipment, prolonging the service life thereof, and guaranteeing the stable operation of the wind turbine in the shallow sea area;

[0060] A plurality of groups of studs A35 are arranged equidistantly on the base platform 100, pass through the perforations on the base 31 and the perforations on the cushion base 34, and are fixed by nuts, forming a reliable mechanical connection; the arrangement of the studs A35 is like tightly bundling the base platform 100, the base 31 and the cushion base 34 together, ensuring that there is no relative displacement between the components under the complex marine environment of sea wind and sea wave impact, and effectively guaranteeing the stability of the bottom support structure of the wind turbine tower 500; like in the field of construction, the all-thread stud achieves double fastening by cooperating with nuts at both ends, improves the sealing of the connection, and prevents medium leakage, and the studs A35 here also guarantee the reliability of the structure connection by a similar principle; the surface of the base 31 is fixed with the center platform 36 through the stabilizing platform 32, and a plurality of groups of L-shaped frames 33 arranged equidistantly on the circumferential outer wall of the stabilizing platform 32 are screwed and fixed at the bottom of the base 31, further enhancing the stability of the overall structure; the combination of the stabilizing platform 32 and the L-shaped frame 33 builds a solid "bridge" between the base 31 and the center platform 36, which can effectively transfer and disperse the load borne by the wind turbine tower 500, so that the structure can maintain good integrity when responding to external forces, reducing the risk of damage caused by local stress concentration, like the ancient building foundation platform base bearing column beam load and roof weight through a stable structure; the design of the cushion base 34 also has unique advantages; a plurality of groups of circular holes with sizes matching those of the studs A35 are arranged equidistantly on the cushion base 34, ensuring accurate cooperation with the studs A35, facilitating installation and disassembly while ensuring stable connection, and improving construction and maintenance efficiency; eight groups of quick-connection seats 341 arranged equidistantly at the bottom of the cushion base 34 are matched in size with eight groups of quick-connection grooves 342 arranged equidistantly on the surface of the base 31, and the quick-connection seats 341 are inserted into the quick-connection grooves 342, so that the quick-connection structure not only enhances the connection tightness between the cushion base 34 and the base 31, but also enables quick positioning during installation, like a precision equipment base providing stable and reliable support for the equipment through accurate structural design, improving the convenience and accuracy of the entire installation process; in addition, the cushion base 34 is annular and covers the surface of the base 31 and is fixed by the studs A35 and nuts, which increases the contact area between the cushion base 34 and the base 31, can more evenly disperse the pressure from the structure above, avoids damage to the base 31 due to excessive local stress, and thus prolongs the service life of the foundation structure;

[0061] The pressure platform 46 is concentric with the surface circular intermediate plate 41, so that the overall stress is more uniform; when the wind turbine tower 500 is working, the complex forces generated by the sea wind and the operation of the tower can be transmitted and dispersed more evenly through this symmetrical structure, reducing the local stress concentration phenomenon and greatly enhancing the structural stability. Just like the symmetrical foundation design of large buildings, it ensures the stability of the building under various external forces; a plurality of groups of stud C42 are installed equidistantly on the outer side of the surface of the intermediate plate 41, which cooperates with the cylindrical rubber seat 43 fixed at the bottom to improve the buffering and damping performance; when the wind turbine tower 500 is impacted by the sea wind and vibrates, the rubber seat 43 can effectively absorb and disperse the vibration energy due to its good elasticity, which reduces the influence of vibration on the tower base 45 and the entire structure, prolongs the service life of the equipment, and ensures the stable operation of the wind turbine in complex marine environment; the ring-shaped gasket 44 and the plurality of installation holes corresponding to the tower base 45 are provided, and the clamping groove 451 at the bottom of the installation hole of the tower base 45 cooperates with the rubber seat 43 and the stud C42 to have multiple advantages; from the installation point of view, the corresponding installation holes facilitate quick positioning and installation of each component, improving construction efficiency; the clamping groove 451 is clamped on the outer side of the rubber seat 43, which further enhances the stability of the connection, prevents displacement of the components during vibration, protects the rubber seat 43, avoids excessive wear, and is similar to the positioning and protection of key components by the clamping groove in some equipment; and the stud C42 passes through the ring-shaped gasket 44 and the tower base 45 in turn and is screwed with the nut to be fixed, and this fastening method forms a reliable mechanical connection to ensure that the components are always tightly combined and maintain the structural integrity under long-term complex working conditions. Embodiments

[0062] Based on the embodiment 1, as shown in Figure 19 , Figure 20 and Figure 21 : the underwater double-layer nested pile foundation mechanism 200 includes a pile foundation platform 21, a central pile foundation 22, an edge pile foundation 23, an outer reinforcing frame 24 and an inner reinforcing frame 25, the bottom of the edge pile foundation 23 is inclined away from the pile foundation platform 21, and the outer ring surface is fixedly provided with the outer reinforcing frame 24; the adjacent two groups of edge pile foundations 23 are fixed through the outer reinforcing frame 24, and the outer reinforcing frame 24 is composed of five groups of parallel horizontal rods and one group of vertical pipes.

[0063] As shown in Figure 19 , Figure 20 and Figure 21As shown in the figure: five groups of edge pile foundations 23 are in a central symmetrical structure, and the top of each is fixedly connected with a pile foundation platform 21, and the inner side of each is fixedly connected with an inner side reinforcing frame 25; the end of the inner side reinforcing frame 25 away from the edge pile foundation 23 is fixedly connected to the outer ring surface of the central pile foundation 22, and five groups of inner side reinforcing frames 25 are equidistantly arranged on the outer ring surface of the central pile foundation 22; the central pile foundation 22 is fixedly connected with the five groups of edge pile foundations 23 through the five groups of inner side reinforcing frames 25 on the outer side.

[0064] As shown in the figure: Figure 20 and Figure 21 As shown in the figure: the structure of the central pile foundation 22 is consistent with that of the edge pile foundation 23, and the top of the central pile foundation 22 is fixedly connected with a pile foundation platform 21; the central pile foundation 22 comprises an outer pile foundation cylinder 221, an inner pile foundation rod 222, a pointed end part 223 and an auxiliary welding sealing plug 224, the outer pile foundation cylinder 221 is fixedly connected to the bottom of the pile foundation platform 21, and the inner pile foundation rod 222 is inserted into the inner part of the outer pile foundation cylinder 221; one end of the inner pile foundation rod 222 is fixedly provided with a pointed end part 223 in a conical shape, and the other end is welded with an auxiliary welding sealing plug 224 in a cylindrical shape; a filling space is formed between the inner pile foundation rod 222 and the outer pile foundation cylinder 221, the inner pile foundation rod 222 passes through the inner part of the outer pile foundation cylinder 221, and the auxiliary welding sealing plug 224 at the top of the inner pile foundation rod 222 is welded and fixed to the inner upper side of the outer pile foundation cylinder 221.

[0065] In actual use, first, use the hydraulic pile hammer to insert the bottom of five groups of edge pile foundations 23 and one group of center pile foundations 22 into the seabed of shallow sea, at this time, weld the pile foundation platform 21 on the top of the edge pile foundations 23 and the center pile foundation 22; At the same time, insert the inner pile foundation rod 222 into the inside of the center pile foundation 22, and pile the inner pile foundation rod 222 through the hydraulic pile hammer, so that the inner pile foundation rod 222 is inserted into the seabed again through the bottom tip 223, to realize double-layer insertion and stable work, the inside of the five groups of edge pile foundations 23 are inserted with the inner pile foundation rod 222, the space between the inner pile foundation rod 222 and the pile foundation can be filled and fixed by filling material, at the same time, after the bottom of the inner pile foundation rod 222 is inserted into the seabed, the auxiliary welding sealing plug 224 at the end of the inner pile foundation rod 222 can be welded on the end of the pile foundation to complete the fixation; by inserting the center pile foundation 22, the five groups of edge pile foundations 23 and the inner pile foundation rod 222 into the seabed respectively, a group pile foundation is formed; effectively increase the contact and area of the structure and the seabed, so as to provide vertical bearing capacity to support the huge weight of the entire wind turbine tower 500, to improve the horizontal load capacity, such as resisting overturning moment caused by wind and wave impact, the overall stability is effectively improved; significantly strengthen and toughen effect, insert the inner pile foundation rod 222 into the center pile foundation 22 and the edge pile foundation 23 again, which is equivalent to adding a skeleton to the main pile foundation; the double-layer nested insertion structure greatly enhances the rigidity and bending resistance of a single pile foundation, so that it can more effectively resist the deformation caused by long-term load such as seabed ocean current and soil creep, the overall structure is more solid and durable, the anti-seismic and anti-fatigue performance is improved, the space between the pile foundation group, the center pile foundation 22 and the edge pile foundation 23 and the inner pile foundation rod 222 is fixed by filling material, which usually means that high-strength grouting material will be poured; this filling layer not only can transfer load, but also can play a damping buffer role, effectively absorb and dissipate the vibration and seismic wave energy transmitted from the upper structure, and protect the pile foundation from fatigue damage; precise leveling and stress distribution, first, weld the pile foundation platform 21 on the top of all pile foundations to form a unified, high-rigidity bearing platform; this platform can ensure that all pile foundations work together, evenly distribute the upper load, avoid settlement difference caused by uneven force of individual pile foundations, and provide an absolutely horizontal reference surface for the installation of the upper foundation platform 100; the auxiliary welding sealing plug 224 at the bottom of the inner pile foundation rod 222 is welded and fixed with the end of the pile foundation, which plays a key role in sealing the pile bottom; it can effectively prevent seawater and silt from entering the internal cavity of the pile foundation, greatly reduce the risk of internal corrosion, and significantly prolong the service life of the pile foundation in harsh marine environment; the advantage of the underwater double-layer nested pile foundation mechanism 200 lies in that it constructs a composite foundation system with deep anchoring, rigidity and flexibility, and collaborative stress through the combination of the center pile foundation 22, the edge pile foundation 23 and the inner pile foundation rod 222;Its group pile layout, double nested, grouting filling and bottom sealing design, together with its unparalleled bearing capacity, stability, durability and anti-vibration performance, meet the harsh requirements of offshore wind turbine foundation structure;

[0066] The bottom of the edge pile foundation 23 is inclined away from the pile foundation platform 21, which is the core design of the jacket foundation. The inclined pile foundation effectively decomposes the horizontal load from the upper wind turbine tower 500, such as wave impact force, into axial compression and tension of the pile foundation, which is jointly borne by the pile body material and the surrounding soil. This greatly improves the ability of the entire foundation to resist horizontal force and overturning moment, ensuring the stability of the wind turbine in severe sea conditions. It has strong integrity and structural stiffness, and all independent pile foundations are welded into a solid overall space frame structure through the outer reinforcement frame 24 and the inner reinforcement frame 25. Connecting single piles into a unified force-sharing body, any part of the load can be quickly transmitted to other pile foundations and the entire structure through the reinforcement frame to avoid stress concentration, significantly enhancing the structural stiffness and integrity of the entire underwater double nested pile foundation mechanism 200. The five groups of edge pile foundations 23 are centrally symmetric and fixed to the central central pile foundation 22 through the inner reinforcement frame 25. The radial and symmetric mechanical design creates an extremely efficient and uniform load transmission path. The huge pressure and bending moment from the upper pile foundation platform 21 can be evenly dispersed to all pile foundations through this rigid frame in the shortest and most direct path, and finally transmitted to the seabed, maximizing the load-bearing capacity of the pile foundation. The outer reinforcement frame 24 is composed of five groups of parallel horizontal bars and one group of vertical pipes, forming a solid space truss. The truss structure can effectively resist structural deformation and vibration under complex sea wave cyclic load, reduce the stress amplitude at the root of the pile foundation, and significantly improve the fatigue resistance of the entire foundation structure, prolonging its service life. The pile foundation platform 21 provides a common and solid top connection platform and construction reference for all pile foundations. First, the pile foundation is set in place, and finally the pile foundation platform 21 is uniformly welded, allowing each pile to have a certain adjustment tolerance when setting, facilitating construction. At the same time, the design of multiple piles and space frames provides structural redundancy, so even if there is a small probability of local damage, the load can be redistributed through other paths to ensure the overall safety of the system. By inclining the edge pile foundation 23 and rigidly connecting it with the central pile foundation 22 through the outer reinforcement frame 24 and the inner reinforcement frame 25 into a centrally symmetric space frame, and finally fixed by the pile foundation platform 21 at the top, this design optimizes the transmission of force, maximizes structural stiffness and stability, and is a very mature, reliable and efficient foundation solution for harsh offshore environments.

[0067] The embodiments of the present application are described in detail above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. A foundation structure for an offshore wind turbine with vibration reduction function, comprising a foundation platform (100), wherein an underwater double-layer nested pile foundation mechanism (200) is fixedly installed at the bottom of the foundation platform (100), and a floating bearing mechanism (300) is fixedly installed on its surface; characterized in that: A floating vibration damping mechanism (400) is installed above the floating bearing mechanism (300), and a wind turbine tower (500) is fixedly connected to the upper side of the floating vibration damping mechanism (400); the bottom of the wind turbine tower (500) is supported on the foundation platform (100) through the floating vibration damping mechanism (400) and the floating bearing mechanism (300), and a tower base (45) is fixedly installed at its bottom, while multiple sets of perforations are equally spaced on the annular surface of the tower base (45); a pile base (21) is fixedly installed at the top of the underwater double-layer nested pile foundation mechanism (200), and a central pile foundation (22) is set at the center of its bottom, while five sets of edge pile foundations (23) are equally spaced on the outer side of its bottom. The floating bearing mechanism (300) includes a base (31), a stabilizing platform (32), an L-shaped frame (33), a pad (34), a stud A (35), a central platform (36), a reinforcing seat (37), a bearing platform (38), and a stud B (39). The base (31) is circular, and multiple sets of perforations are equidistantly opened on its outer surface. A stud A (35) is inserted inside the perforations. The stud A (35) passes through the perforations and is fixed by a nut. Its bottom is fixedly connected to the pile foundation platform (21). A central pile foundation (22) is fixedly installed in the middle of the base (31). Multiple sets of L-shaped frames (33) are equidistantly fixed on the outer ring surface of the central pile foundation (22), and a central platform (36) is fixedly connected to its top. The central platform (36) is hexagonal, and a reinforcing seat (37) is fixedly installed on each of its six sides. The bottom of the reinforcing seat (37) is fixedly connected to the stabilizing platform (32). The pad (34) has multiple sets of round holes that are equidistant from the stud A (35) and eight sets of quick-connect seats (341) are equidistant from the bottom. The base (31) has eight sets of quick-connect grooves (342) equidistant from the surface. The quick-connect grooves (342) are equidistant from the quick-connect seats (341) and the quick-connect seats (341) are inserted into the quick-connect grooves (342). The pad (34) is annular and covers the surface of the base (31) and is fixed by stud A (35) and nuts. The support platform (38) is configured as six sets, which are respectively fixed to the six sides of the central platform (36), and a circular locking cover (393) is screwed to its surface. At the same time, a spherical buffer groove is opened inside it. The bottom of the stud B (39) is fixedly connected to the adapter ball (391), and the size of the adapter ball (391) is adapted to the buffer groove. The outer side of the adapter ball (391) is fixedly connected to the rubber pad (392), and it is movably connected to the buffer groove through the outer rubber pad (392). The central platform (36) includes a damping space (361), a docking groove (362), a damping core sleeve (363), a docking strip (364), a damping column (365), a stabilizing hole (366), and a stabilizing column (367). The damping space (361) is located inside the central platform (36), and six sets of stabilizing columns (367) are fixedly connected at equal intervals at its internal corners. At the same time, a damping core sleeve (363) is inserted inside it. Six sets of docking strips (364) are fixedly connected at the outer corners of the damping core sleeve (363), and damping columns (365) are arranged at equal intervals on its inner side. A stabilizing hole (366) is opened inside the damping column (365), and the size of the stabilizing hole (366) is adapted to the stabilizing column (367). At the same time, the six sets of stabilizing columns (367) are respectively inserted into the stabilizing holes (366) opened inside the six sets of damping columns (365). The inner side of the central platform (36) is also provided with multiple sets of docking slots (362) at equal intervals, and the docking slots (362) are adapted to the size of the docking strips (364). At the same time, the docking strips (364) are inserted into the inside of the docking slots (362). Both the docking slots (362) and the docking strips (364) are dovetail-shaped. The damping core sleeve (363) is positioned and installed inside the damping space (361) through multiple sets of quick-connect slots (342) and docking strips (364). A damping channel is formed between two adjacent sets of damping columns (365), and a seat (481) is inserted inside the damping channel. At the same time, a floating vibration damping mechanism (400) is installed above it.

2. The foundation structure of an offshore wind turbine with vibration reduction function according to claim 1, characterized in that: The underwater double-layer nested pile foundation mechanism (200) includes a pile foundation platform (21), a central pile foundation (22), an edge pile foundation (23), an outer reinforcing frame (24), and an inner reinforcing frame (25). The bottom of the edge pile foundation (23) is inclined away from the pile foundation platform (21), and an outer reinforcing frame (24) is fixedly installed on its outer ring surface. The two adjacent sets of edge pile foundations (23) are fixed together by the outer reinforcing frame (24), and the outer reinforcing frame (24) consists of five sets of parallel horizontal bars and one set of vertical pipes.

3. The foundation structure of an offshore wind turbine with vibration reduction function according to claim 2, characterized in that: The five sets of edge pile foundations (23) have a centrally symmetrical structure, and the top of the pile foundation platform (21) is fixedly connected to the pile foundation platform (21), while the inner side is fixedly connected to the inner side reinforcement frame (25); the end of the inner side reinforcement frame (25) away from the edge pile foundation (23) is fixedly connected to the outer ring surface of the central pile foundation (22), and five sets of inner side reinforcement frames (25) are equidistantly arranged on the outer ring surface of the central pile foundation (22); the central pile foundation (22) is fixedly connected to the five sets of edge pile foundations (23) respectively through the five sets of inner side reinforcement frames (25) on the outside.

4. The foundation structure of an offshore wind turbine with vibration reduction function according to claim 3, characterized in that: The central pile foundation (22) has the same structure as the edge pile foundation (23), and its top is fixed to the pile foundation platform (21). The central pile foundation (22) includes an outer pile foundation cylinder (221), an inner pile foundation rod (222), a tip (223), and an auxiliary welded sealing plug (224). The outer pile foundation cylinder (221) is fixed to the bottom of the pile foundation platform (21), and the inner pile foundation rod (222) is inserted inside it. One end of the inner pile foundation rod (222) is fixedly provided with a conical tip (223), and the other end is welded with a cylindrical auxiliary welded sealing plug (224). A filling space is formed between the inner pile foundation rod (222) and the outer pile foundation cylinder (221). The inner pile foundation rod (222) passes through the interior of the outer pile foundation cylinder (221), and the auxiliary welded sealing plug (224) at its top is welded and fixed to the upper side of the interior of the outer pile foundation cylinder (221).

5. The foundation structure of an offshore wind turbine with vibration reduction function according to claim 1, characterized in that: The floating vibration damping mechanism (400) includes a plate (41), a stud C (42), a rubber seat (43), an annular gasket (44), a tower base (45), a slot (451), a pressure table (46), a docking seat (47), and a core floating platform (48). The pressure table (46) is internally fixedly connected to the core floating platform (48), and the plate (41) is fixedly connected to its surface. Six sets of seats (481) are equidistantly fixed on the outer side of the core floating platform (48). The core floating platform (48) is a columnar structure made of metal. The outer side of the core floating platform (48) is elastically connected to the central platform (36) through a damping core sleeve (363). The bottom of the pressure table (46) is equidistantly equipped with six sets of docking seats (47), and the docking seats (47) are provided with through holes. At the same time, studs B (39) are inserted inside the through holes. The studs B (39) pass through the circular docking seats (47) and are fixedly connected by nuts. The pressure platform (46) and its circular interface plate (41) are concentric. Multiple sets of studs C (42) are installed at equal intervals on the outer side of the interface plate (41). At the same time, cylindrical rubber seats (43) are fixed to the bottom of each stud C (42). Multiple sets of mounting holes are opened at equal intervals on the annular gasket (44) and the tower base (45). The mounting holes on the tower base (45) are provided with slots (451) at the bottom. The slots (451) are engaged with the outer side of the rubber seat (43). At the same time, the studs C (42) pass through the annular gasket (44) and the tower base (45) in sequence and are screwed and fixed with nuts.

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