Shared suction anchor with a hollow structure and a system and method for maintaining stability of an installation posture thereof

Abstract

The application discloses a shared suction anchor with a hollow structure and a system and method for maintaining the installation posture of the shared suction anchor, and the shared suction anchor comprises a cylinder, a hollow structure frame, an eye plate module and a mooring anchor chain. The hollow structure frame and the cylinder form a core bearing structure, the overall rigidity, external pressure resistance, buckling resistance and lateral tilting resistance are improved through the frame type stress, and the self-weight is reduced. The hollow structure frame has a guiding and posture stabilizing effect during sinking and penetration, and the tilting risk is reduced. The distributed mooring anchor chain disperses the load to different eye plates, avoids local stress concentration, and is suitable for shared use of multiple floating structures. During installation, the inclination sensor, the beacon and multiple ROVs are cooperatively controlled, the cross section posture is stabilized, the inclination resistance is improved, the resistance balance is achieved, and the structure advantage of stress centering is combined, so that the sinking and penetration posture is accurately maintained, and the installation verticality is ensured. The application takes into account the light weight and high rigidity, and solves the technical problems of stress concentration, installation tilting and recovery difficulty of the traditional suction anchor.

Description

Technical Field

[0001] This invention relates to the technical field of anchoring foundations for floating platforms in marine engineering, and particularly to a shared suction anchor with a hollow structure and its installation attitude stabilization system and method. Background Technology

[0002] As marine engineering expands into deeper waters, the types of anchorage foundations for floating structures are becoming increasingly diverse, mainly including gravity anchors, pile anchors, towed anchors, and suction anchors. Among these, suction anchors, with their simple manufacturing process, low construction cost, and superior load-bearing capacity, are gradually becoming the primary choice for anchorage foundations of floating structures.

[0003] Currently, floating wind turbine platforms are gradually transitioning from demonstration projects to commercialization. In deep-sea environments, the use of traditional single suction anchor structures leads to a significant increase in engineering costs. Therefore, shared suction anchors are gradually becoming a major research direction for the future development of deep-sea floating structures. Shared suction anchors allow multiple platforms to share a single anchor, effectively saving engineering costs and improving economic efficiency.

[0004] However, existing shared suction anchors still have many technical shortcomings, which restrict the engineering application of shared anchoring technology in deep-sea areas:

[0005] First, it is difficult to balance structural stiffness and lightweight design. Existing shared suction anchors have a single cylindrical shell, resulting in heavy weight and insufficient buckling resistance. Under deep-sea cyclic loads, the shell is prone to significant deformation. Furthermore, existing shared suction anchors must withstand multi-directional composite loads from multiple directions, and the stiffness of the existing structure is ill-suited to the stress requirements of shared anchoring. While the shared suction anchor proposed by Zhejiang University (CN118083037A) employs a flat skirt structure with an upper skirt, lower skirt, and wing plates, which improves structural stiffness to some extent, the skirt structure adds additional weight and does not fundamentally solve the problem of balancing lightweight design and stiffness. The shared suction anchor proposed by Yangtze River Survey, Planning and Design Research Co., Ltd. (CN121516168A) uses a double-tube structure with an internal suction tube and an external reinforcing tube, improving load-bearing capacity through grouting consolidation. However, the double-tube structure further increases the anchor's weight, and the grouting process is complex and has a long construction period.

[0006] Second, stress concentration is a significant issue. Shared suction anchors typically use a single anchor chain connected to the anchor cap or a single eye plate. This concentrated load transfer easily leads to localized stress concentration within the cylinder, affecting the structure's fatigue life and safety. Currently, there are no reports of shared suction anchors employing distributed anchor chain force transmission structures; directly connecting multiple anchor chains to the cap or a single connection point fails to effectively distribute the load.

[0007] Third, controlling the insertion posture is difficult. Traditional cylindrical structures have poor anti-tilting performance and low installation accuracy, making them prone to tilting during the sinking process. Studies have shown that the installation tilt of suction anchors significantly reduces their load-bearing capacity, with a noticeable decrease when tilted between 3° and 9°.

[0008] Fourth, recycling and reuse are difficult. Existing shared suction anchors are difficult to recycle, easily damaged, and have poor versatility, making them unsuitable for the mooring loads and location requirements of different floating structures. Traditional solid cylindrical structures are too heavy, increasing the energy consumption and difficulty of recovery and lifting.

[0009] Therefore, there is an urgent need to develop a lightweight, high-rigidity, uniformly stressed solution that is compatible with shared suction anchors and allows for precise control of the installation attitude, in order to address the pain points of existing technologies and meet the engineering requirements for intensive floating structure anchoring in deep-sea areas. Summary of the Invention

[0010] The purpose of this invention is to overcome the shortcomings of the prior art and provide a shared suction anchor with a hollow structure and its installation posture stabilization system and method.

[0011] To achieve the above objectives, the technical solution provided by this invention is as follows:

[0012] A shared suction anchor with a hollow structure includes a cylindrical body, a hollow structural frame with the same height as the cylindrical body and surrounding the cylindrical body, an eye plate module, and a mooring anchor chain.

[0013] The hollow structure frame includes a regular polygonal irregular cross section with an even number of sides, longitudinal ribs, and transverse ribs;

[0014] The longitudinal ribs, transverse ribs, and regular polygonal irregular cross-sections are all hollow structures.

[0015] The irregular polygonal cross section is connected to the cylinder through staggered longitudinal and transverse ribs, forming multiple flow spaces surrounding the cylinder, and adjacent flow spaces are all connected.

[0016] The mooring anchor chain is connected to the regular polygonal irregular section through the eye plate module.

[0017] Furthermore, the eyeplate module includes an upper eyeplate and a lower eyeplate, which are arranged vertically.

[0018] The mooring anchor chain includes an upper mooring anchor chain, a lower mooring anchor chain, a connector, and a main mooring anchor chain;

[0019] The upper mooring anchor chain and the lower mooring anchor chain are respectively connected to the upper eyeplate and the lower eyeplate via shackles;

[0020] The connectors are connected to the upper and lower mooring chains via shackles to distribute and transfer the floating load.

[0021] The main mooring chain is connected to the connector via shackles and is used to transfer the load on the floating body.

[0022] Furthermore, the hollowed-out structural frame has a three-layer structure;

[0023] The upper eyeplate is directly opposite the connection between the first and second layers;

[0024] The lower eyelid plate is directly opposite the connection between the second and third layers.

[0025] Furthermore, the connector has an equilateral triangular structure, with shackle connection holes at each of its three corners.

[0026] Furthermore, the eyeplate module comprises multiple sets, which are evenly distributed circumferentially along the irregular polygonal cross-section and connected to different floating bodies through corresponding mooring anchor chains.

[0027] Furthermore, the top of the hollowed-out structural frame is provided with a steel grating.

[0028] Furthermore, the cylinder is cylindrical, with a top sealing plate at the top and an open bottom.

[0029] Furthermore, the upper surface of the top sealing plate is connected to a hoisting reinforcing rib.

[0030] Furthermore, to achieve the above objectives, the present invention also provides an installation attitude stabilization system, which includes the shared suction anchor with a hollow structure, tilt sensor, beacon, underwater remotely operated robot, suction pump, and control unit described above.

[0031] The top sealing plate is provided with a first through hole;

[0032] The hoisting reinforcing rib is provided with a second through hole directly opposite the first through hole;

[0033] The tilt sensors are evenly arranged on the top of the cylinder, and the position of each tilt sensor is consistent with the position of the corresponding eye plate module, which is used to collect the horizontal and vertical data of the shared suction anchor in real time.

[0034] Multiple beacons are arranged along the corresponding eyeplate module to mark the orientation and deflection angle of the shared suction anchor;

[0035] The underwater remotely operated robot is configured in 2 to 3 units and is evenly distributed along the circumference of the cylinder. Each underwater remotely operated robot is equipped with an underwater camera and a vector thruster to provide real-time feedback on the contact status between the shared suction anchor and the seabed. When the shared suction anchor deviates in attitude, the underwater remotely operated robot is adjusted to a position facing the irregular polygonal cross section to apply thrust, and the attitude is adjusted in conjunction with the control unit.

[0036] The suction pump is detachably mounted on the lifting reinforcing rib and is connected to the interior of the cylinder through a suction pipe passing through the first and second through holes;

[0037] The control unit is used to receive data from the tilt sensor, beacon, and suction pump, determine the type of deviation, and calculate the thrust distribution scheme for each underwater remotely operated robot to achieve closed-loop control.

[0038] Furthermore, to achieve the above objectives, the present invention also provides a method for stabilizing the installation attitude, which employs the installation attitude stabilization system described above. The method includes the following steps:

[0039] S1. Preparations before hoisting;

[0040] The surface debris of the seabed was cleaned up, and an underwater remotely controlled robot was deployed and evenly distributed along the circumference of the cylinder.

[0041] S2. Hoist the equipment down to the bedside;

[0042] The horizontality of the shared suction anchor is monitored in real time by an tilt sensor, and the underwater camera equipped with the underwater remotely operated robot provides synchronous feedback on the status of the shared suction anchor. When the horizontality exceeds 1%, the underwater remotely operated robot adjusts the shared suction anchor using a vector thruster. During the process of lowering the shared suction anchor to a depth of 0.5m from the seabed, the sinking rate must not exceed 10cm / min.

[0043] S3. Hoisting and mud-entry calibration;

[0044] The installation accuracy is determined by calibrating the orientation angle and position of the shared suction anchor using beacons.

[0045] S4. Hoist the equipment into the mud until it sinks to its own weight depth;

[0046] The horizontal and verticality data of the shared suction anchor sinking process are monitored in real time by tilt sensors. When the tilt is less than or equal to the set value, a single underwater remotely operated robot is used in conjunction with a vector thruster to apply thrust for attitude correction. When the tilt is greater than the set value, multiple underwater remotely operated robots and corresponding vector thrusters are used in conjunction to apply thrust, while the negative pressure is finely adjusted. The sinking rate during this stage must not exceed 3 cm / min.

[0047] S5, Negative pressure sinking process;

[0048] Turn on the suction pump and slowly penetrate using an intermittent negative pressure penetration method; the control unit monitors the pressure difference of the suction pump in real time to ensure that the pressure difference does not exceed the allowable penetration pressure difference; when the shared suction anchor tilts, multiple underwater remotely operated robots are used in conjunction with corresponding vector thrusters to apply thrust for adjustment;

[0049] S6. Installation complete;

[0050] Once the shared suction anchor has penetrated to the set depth, an underwater remotely operated vehicle (ROV) is used to observe the mud penetration of the top of the shared suction anchor along its circumference, and then the ROV and suction pump are retrieved.

[0051] Compared with existing technologies, the principles and advantages of this technical solution are as follows:

[0052] 1. By combining a hollow structural frame with a cylindrical body, the shared suction anchor achieves both lightweight and high rigidity, which can improve the shared suction anchor's resistance to external pressure, buckling, and tilting, and can withstand multi-directional composite loads, thus meeting the requirements of shared suction anchors.

[0053] 2. Compared with traditional shared suction anchors, it is less prone to tilting and can achieve the stability of the shared suction anchor posture during the sinking process. The installation verticality deviation is significantly optimized compared with traditional shared suction anchors. Its posture stabilization mechanism includes: (1) Cross-sectional posture stabilization advantage - the combination of regular polygonal irregular cross-section with an even number of sides and cylindrical cross-section replaces the traditional cylindrical cross-section. The outer periphery of the cylinder is uniformly stressed, the lateral resistance is evenly distributed, and there is no defect of the cylindrical cylinder being stressed and slipped on one side. It has its own guidance during the sinking process, which greatly reduces the risk of tilting; (2) Anti-tilting advantage - the hollow structure frame forms an overall stress skeleton, and the torsional and anti-tilting stiffness of the cylinder is multiplied, which can effectively offset the tilting force caused by uneven seabed soil and lateral disturbance of water flow; (3) Resistance balance advantage - the adjacent flow space is connected, realizing the uniform connection of soil inside and outside the frame. During negative pressure sinking, the soil is discharged smoothly, avoiding the tilting caused by the sudden increase of resistance on one side of the traditional shared suction anchor, and the force is balanced.

[0054] 3. The equilateral triangular connecting member (triple plate) combined with the upper and lower mooring chains for load transmission can distribute the load to different eye plates, effectively solving the problem of local stress concentration. This extends the fatigue life of the shared suction anchor structure under complex cyclic loads.

[0055] 4. The design of multiple eyeplate modules with distributed anchor chain connection allows multiple eyeplate modules to be arranged at the same height along the circumference of the hollow structure frame, simultaneously connecting multiple mooring anchor chains, adapting to multiple floats, and used as a shared suction anchor.

[0056] 5. The eye plate module is set on the regular polygonal irregular section of the hollow structural frame (instead of the traditional cylinder wall), which can reduce the reduction of the strength of the soil around the cylinder by the groove effect formed by the mooring anchor chain under cyclic load, and improve the pull-out bearing capacity of the shared suction anchor.

[0057] 6. The hollow structure frame can reduce the self-weight of the anchor body, making installation efficient and convenient; it can achieve non-destructive recycling and reuse, greatly improving material utilization, meeting the engineering requirements of intensive construction, and reducing the total life cycle cost.

[0058] 7. Compared to existing technologies where underwater remotely operated robots (ROVs) are only used for visual monitoring (such as the Sonardyne SMART system), the tilt sensor + beacon + underwater ROV (equipped with an underwater camera and vector thrusters) collaborative closed-loop control system in this technical solution can monitor and actively adjust the attitude in real time throughout the entire installation process, achieving visualized and automated control of attitude maintenance. This system, in conjunction with the four-dimensional attitude stabilization mechanism at the structural level, upgrades from "passive anti-tilt" to "active stabilization," greatly improving the installation success rate. Attached Figure Description

[0059] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the services required in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description 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.

[0060] Figure 1 This is a schematic diagram of a shared suction anchor with a hollow structure in an embodiment of the present invention (only one set of eyeplate modules is shown, while other sets of eyeplate modules and the steel grating at the top of the hollow structure frame are omitted).

[0061] Figure 2 This is a top view of the hollow structure shared suction anchor cylinder and the hollow structure frame connected together in an embodiment of the present invention;

[0062] Figure 3 This is a schematic diagram of the connection between the lower eye plate and the lower mooring anchor chain in a shared suction anchor with a hollow structure in an embodiment of the present invention, which is connected by a shackle (A is the shackle).

[0063] Figure 4 This is a flowchart illustrating the principle of the attitude stabilization method in an embodiment of the present invention.

[0064] Figure label:

[0065] 1-Cylinder body; 2-Regular octagonal irregular cross section; 3-Longitudinal rib plate; 4-Transverse rib plate; 5-Upper eye plate; 6-Lower eye plate; 7-Upper mooring anchor chain; 8-Lower mooring anchor chain; 9-Connector; 10-Main mooring anchor chain; 11-Steel grating; 12-Top sealing plate; 13-Lifting reinforcing rib plate. Detailed Implementation

[0066] The present invention will be further described below with reference to specific embodiments:

[0067] like Figure 1 and Figure 2As shown, the shared suction anchor with a hollow structure described in this embodiment includes a cylindrical body 1, a hollow structural frame with the same height as the cylindrical body 1 and surrounding the cylindrical body 1 in the middle, multiple eye plate modules, and multiple mooring anchor chains corresponding to the eye plate modules.

[0068] The hollow structure frame includes a regular octagonal irregular section 2, longitudinal ribs 3, and transverse ribs 4; the longitudinal ribs 3, transverse ribs 4, and regular octagonal irregular section 2 are all hollow structures; the regular octagonal irregular section 2 is connected to the cylinder 1 through the interlaced longitudinal ribs 3 and transverse ribs 4, forming multiple flow spaces surrounding the cylinder 1, and adjacent flow spaces are all connected; the mooring anchor chain is connected to the regular octagonal irregular section 2 through the eye plate module.

[0069] Specifically, in this embodiment, each eyeplate module includes an upper eyeplate 5 and a lower eyeplate 6, which are arranged vertically; the corresponding mooring anchor chain includes an upper mooring anchor chain 7, a lower mooring anchor chain 8, a connector 9, and a main mooring anchor chain 10; the upper mooring anchor chain 7 and the lower mooring anchor chain 8 are respectively connected to the corresponding upper eyeplate 5 and lower eyeplate 6 via shackles, such as... Figure 3 As shown; the connector 9 is connected to the upper mooring anchor chain 7 and the lower mooring anchor chain 8 respectively via shackles, and is used to distribute and transfer the load on the floating body; the main mooring anchor chain 10 is connected to the connector 9 via shackles, and is used to transfer the load on the floating body.

[0070] Specifically, in this embodiment, the hollow structure frame is a three-layer structure; the upper eye plate 5 is directly opposite the connection between the first and second layers, and the lower eye plate 6 is directly opposite the connection between the second and third layers, so that the floating load transmitted by the corresponding mooring anchor chain can be evenly transmitted to the combination of the hollow structure frame and the cylinder 1 through the eye plate module.

[0071] Specifically, in this embodiment, the connector 9 has an equilateral triangular structure with shackle connection holes at each of its three corners. The equilateral triangular connector 9, combined with the force transmission method of the upper mooring chain 7 and the lower mooring chain 8, can distribute the load to different eye plates, effectively solving the problem of localized stress concentration. This extends the fatigue life of the shared suction anchor structure under complex cyclic loads.

[0072] Specifically, in this embodiment, there are multiple sets of eyeplate modules, evenly distributed at the same height along the two circumferences of the irregular octagonal cross-section, and connected to different floats via corresponding mooring chains. Through the design of multiple sets of eyeplate modules connected by distributed mooring chains, multiple mooring chains can be simultaneously connected, adapting to multiple floats and used as a shared suction anchor.

[0073] Specifically, in this embodiment, a steel grating 11 is provided on the top of the hollow structure frame, which can play a certain role in preventing erosion.

[0074] Specifically, in this embodiment, the cylinder 1 is cylindrical, with a top sealing plate 12 at the top and an open bottom; the upper surface of the top sealing plate 12 is connected to a hoisting reinforcing rib 13, which can prevent the top sealing plate 12 from buckling and being damaged during installation and recycling. More specifically, the top sealing plate 12 has a first through hole, and the hoisting reinforcing rib 13 has a second through hole directly opposite the first through hole.

[0075] In this embodiment, the hollow structural frame combined with the cylinder 1 achieves both lightweight and high rigidity of the shared suction anchor, which can improve the shared suction anchor's resistance to external pressure, buckling, and tilting, and can withstand multi-directional composite loads, thus meeting the requirements of the shared suction anchor.

[0076] The eye plate module is set on the regular octagonal irregular section 2 of the hollow structural frame (instead of the traditional cylinder wall), which can reduce the reduction of the soil strength around the cylinder 1 by the groove effect formed by the mooring anchor chain under cyclic load, and improve the pull-out bearing capacity of the shared suction anchor.

[0077] The hollow structure frame can reduce the self-weight of the anchor body, making installation efficient and convenient; it can be recycled and reused without damage, greatly improving the utilization rate of materials, meeting the engineering requirements of intensive construction, and reducing the total life cycle cost.

[0078] Compared to traditional shared suction anchors, it is less prone to tilting, achieving attitude stability during the sinking process, and significantly optimizing installation verticality deviation. Its attitude stabilization mechanism includes:

[0079] (1) Advantages of cross-section stability - The combination of regular octagonal irregular cross-section 2 and cylindrical cross-section replaces the traditional cylindrical cross-section. The outer periphery of the cylinder 1 is uniformly stressed, the lateral resistance is evenly distributed, and there is no defect of single-sided force slippage of the cylindrical cylinder. It has its own guidance during the sinking process, which greatly reduces the risk of tilting.

[0080] (2) Anti-tilting advantage - The hollow structure frame forms an overall load-bearing skeleton, and the torsional and tilting stiffness of the cylinder body is increased by a factor of two, which can effectively offset the tilting force caused by uneven seabed soil and lateral disturbance of water flow.

[0081] (3) Advantage of balanced resistance - adjacent flow spaces are connected, so that the soil inside and outside the frame can be uniformly connected. When the negative pressure sinks, the soil is discharged smoothly, avoiding the deviation caused by the sudden increase of resistance on one side of the traditional shared suction anchor, and the force is balanced.

[0082] In addition, this embodiment also includes an installation attitude stabilization system, which includes the above-mentioned shared suction anchor with a hollow structure, tilt sensor, beacon, remotely operated underwater vehicle (ROV), suction pump, and control unit;

[0083] Among them, the tilt sensors are evenly arranged on the top of the cylinder 1, and the position of each tilt sensor is consistent with the position of the corresponding eye plate module, which is used to collect the horizontal and vertical data of the shared suction anchor in real time.

[0084] Multiple beacons are arranged along the corresponding eyeplate module to mark the orientation and deflection angle of the shared suction anchor.

[0085] Two to three underwater remotely operated vehicles (ROVs) are evenly deployed around the circumference of the cylinder 1. Each ROV is equipped with an underwater camera and a vector thruster to provide real-time feedback on the contact status between the shared suction anchor and the seabed. When the shared suction anchor deviates from its attitude, the ROV is adjusted to face the octagonal irregular section 2 to apply thrust, thereby cooperating with the control unit to achieve attitude adjustment.

[0086] The suction pump is detachably mounted on the lifting reinforcing rib 13 by means of flange and bolts, and is connected to the interior of the cylinder 1 through a suction pipe passing through the first and second through holes.

[0087] The control unit receives data from the tilt sensor, beacon, and suction pump, determines the type of deviation, calculates the thrust distribution scheme for each underwater remotely operated robot, and achieves closed-loop control.

[0088] like Figure 4 As shown, the working principle of the attitude stabilization system includes:

[0089] S1. Preparations before hoisting;

[0090] The surface debris of the seabed was cleaned up, and an underwater remotely operated robot was deployed and evenly distributed along the circumference of the cylinder.

[0091] S2. Hoist the equipment down to the bedside;

[0092] The horizontality of the shared suction anchor is monitored in real time by an tilt sensor, and the underwater camera equipped with the underwater remotely operated robot provides synchronous feedback on the status of the shared suction anchor. When the horizontality exceeds 1%, the underwater remotely operated robot adjusts the shared suction anchor using a vector thruster. During the process of lowering the shared suction anchor to a depth of 0.5m from the seabed, the sinking rate must not exceed 10cm / min.

[0093] S3. Hoisting and mud-entry calibration;

[0094] The installation accuracy is determined by calibrating the orientation angle and position of the shared suction anchor using beacons.

[0095] S4. Hoist the equipment into the mud until it sinks to its own weight depth;

[0096] The horizontal and verticality data of the shared suction anchor sinking process are monitored in real time by tilt sensors. When the tilt is less than or equal to the set value, a single underwater remotely operated robot is used in conjunction with a vector thruster to apply thrust for attitude correction. When the tilt is greater than the set value, multiple underwater remotely operated robots and corresponding vector thrusters are used in conjunction to apply thrust, while the negative pressure is finely adjusted. The sinking rate during this stage must not exceed 3 cm / min.

[0097] S5, Negative pressure sinking process;

[0098] Turn on the suction pump and slowly penetrate using an intermittent negative pressure penetration method; the control unit monitors the pressure difference of the suction pump in real time to ensure that the pressure difference does not exceed the allowable penetration pressure difference; when the shared suction anchor tilts, multiple underwater remotely operated robots are used in conjunction with corresponding vector thrusters to apply thrust for adjustment;

[0099] S6. Installation complete;

[0100] Once the shared suction anchor has penetrated to the set depth, an underwater remotely operated vehicle (ROV) is used to observe the mud penetration of the top of the shared suction anchor along its circumference, and then the ROV and suction pump are retrieved.

[0101] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, any changes made in accordance with the shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A shared suction anchor with a hollow structure, characterized in that, Includes a cylindrical body, a hollow structural frame with the same height as the cylindrical body and surrounding the cylindrical body, an eye plate module, and a mooring anchor chain; The hollow structure frame includes a regular polygonal irregular cross section with an even number of sides, longitudinal ribs, and transverse ribs; The longitudinal ribs, transverse ribs, and regular polygonal irregular cross-sections are all hollow structures. The irregular polygonal cross section is connected to the cylinder through staggered longitudinal and transverse ribs, forming multiple flow spaces surrounding the cylinder, and adjacent flow spaces are all connected. The mooring anchor chain is connected to the regular polygonal irregular section through the eye plate module.

2. The shared suction anchor with a hollow structure according to claim 1, characterized in that, The eyeplate module includes an upper eyeplate and a lower eyeplate, which are arranged vertically. The mooring anchor chain includes an upper mooring anchor chain, a lower mooring anchor chain, a connector, and a main mooring anchor chain; The upper mooring anchor chain and the lower mooring anchor chain are respectively connected to the upper eyeplate and the lower eyeplate via shackles; The connectors are connected to the upper and lower mooring chains via shackles to distribute and transfer the floating load. The main mooring chain is connected to the connector via shackles and is used to transfer the load on the floating body.

3. The shared suction anchor with a hollow structure according to claim 2, characterized in that, The hollowed-out structural frame has a three-layer structure; The upper eyeplate is directly opposite the connection between the first and second layers; The lower eyelid plate is directly opposite the connection between the second and third layers.

4. The shared suction anchor with a hollow structure according to claim 2, characterized in that, The connector has an equilateral triangle structure, with shackle connection holes at each of its three corners.

5. The shared suction anchor with a hollow structure according to claim 2, characterized in that, The eyeplate module consists of multiple sets, which are evenly distributed circumferentially along the irregular polygonal cross-section and connected to different floating bodies through corresponding mooring anchor chains.

6. The shared suction anchor with a hollow structure according to claim 1, characterized in that, The top of the hollowed-out structural frame is equipped with a steel grating.

7. The shared suction anchor with a hollow structure according to any one of claims 1-6, characterized in that, The cylinder is cylindrical, with a top sealing plate at the top and an open bottom.

8. The shared suction anchor with a hollow structure according to claim 7, characterized in that, The top sealing plate is connected to a hoisting reinforcing rib.

9. An installation attitude stabilization system, characterized in that it includes a shared suction anchor with a hollow structure, an tilt sensor, a beacon, an underwater remotely operated robot, a suction pump, and a control unit as described in claim 8; The top sealing plate is provided with a first through hole; The hoisting reinforcing rib is provided with a second through hole directly opposite the first through hole; The tilt sensors are evenly arranged on the top of the cylinder, and the position of each tilt sensor is consistent with the position of the corresponding eye plate module, which is used to collect the horizontal and vertical data of the shared suction anchor in real time. Multiple beacons are arranged along the corresponding eyeplate module to mark the orientation and deflection angle of the shared suction anchor; The underwater remotely operated robot is configured in 2 to 3 units and is evenly distributed along the circumference of the cylinder. Each underwater remotely operated robot is equipped with an underwater camera and a vector thruster to provide real-time feedback on the contact status between the shared suction anchor and the seabed. When the shared suction anchor deviates in attitude, the underwater remotely operated robot is adjusted to a position facing the irregular polygonal cross section to apply thrust, and the attitude is adjusted in conjunction with the control unit. The suction pump is detachably mounted on the lifting reinforcing rib and is connected to the interior of the cylinder through a suction pipe passing through the first and second through holes; The control unit is used to receive data from the tilt sensor, beacon, and suction pump, determine the type of deviation, and calculate the thrust distribution scheme for each underwater remotely operated robot to achieve closed-loop control.

10. A method for stabilizing installation attitude, implemented using the installation attitude stabilization system as described in claim 9, characterized in that, Includes the following steps: S1. Preparations before hoisting; The surface debris of the seabed was cleaned up, and an underwater remotely controlled robot was deployed and evenly distributed along the circumference of the cylinder. S2. Hoist the equipment down to the bedside; The horizontality of the shared suction anchor is monitored in real time by an tilt sensor, and the underwater camera equipped with the underwater remotely operated robot provides synchronous feedback on the status of the shared suction anchor. When the horizontality exceeds 1%, the underwater remotely operated robot adjusts the shared suction anchor using a vector thruster. During the process of lowering the shared suction anchor to a depth of 0.5m from the seabed, the sinking rate must not exceed 10cm / min. S3. Hoisting and mud-entry calibration; The installation accuracy is determined by calibrating the orientation angle and position of the shared suction anchor using beacons. S4. Hoist the equipment into the mud until it sinks to its own weight depth; The horizontal and verticality data of the shared suction anchor sinking process are monitored in real time by tilt sensors. When the tilt is less than or equal to the set value, a single underwater remotely operated robot is used in conjunction with a vector thruster to apply thrust for attitude correction. When the tilt is greater than the set value, multiple underwater remotely operated robots and corresponding vector thrusters are used in conjunction to apply thrust, while the negative pressure is finely adjusted. The sinking rate during this stage must not exceed 3 cm / min. S5, Negative pressure sinking process; Turn on the suction pump and slowly penetrate using an intermittent negative pressure penetration method; the control unit monitors the pressure difference of the suction pump in real time to ensure that the pressure difference does not exceed the allowable penetration pressure difference; when the shared suction anchor tilts, multiple underwater remotely operated robots are used in conjunction with corresponding vector thrusters to apply thrust for adjustment; S6. Installation complete; Once the shared suction anchor has penetrated to the set depth, an underwater remotely operated vehicle (ROV) is used to observe the mud penetration of the top of the shared suction anchor along its circumference, and then the ROV and suction pump are retrieved.

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