Semi-rigid connection offshore photovoltaic aquaculture system and cross-section bearing capacity evaluation method

Abstract

The application discloses a semi-rigid connection offshore photovoltaic aquaculture system and a cross-section bearing capacity evaluation method, wherein the semi-rigid connection offshore photovoltaic aquaculture system comprises a plurality of floating body modules and a first connection assembly; the first connection assembly comprises a hinged piece and a connection fixing piece; the connection fixing piece comprises a sliding meshing plate, a guide groove and an elastic adjusting piece; the sliding meshing plate is arranged on the side wall of the floating body module in the vertical direction; the guide groove is arranged on the side wall of the adjacent floating body module in the horizontal direction; the elastic adjusting piece is telescopically arranged in the guide groove; and one end of the elastic adjusting piece is provided with a beak plate outside the guide groove. Under normal working conditions, the beak plate is completely abutted against the sliding meshing plate, so that the adjacent floating body modules are rigidly connected to maintain the overall stability; under extreme working conditions, the beak plate is separated from the sliding meshing plate, and the floating body modules are only connected through the hinged piece to allow the floating body modules to rotate, thereby avoiding stress concentration at the connection position and solving the problem of single connection form of the existing floating photovoltaic aquaculture structure.

Description

Technical Field

[0001] This invention relates to the field of marine engineering structure technology, and in particular to a semi-rigid connection marine photovoltaic aquaculture system and a method for evaluating the cross-sectional bearing capacity. Background Technology

[0002] With the deepening of dual-carbon goals, the comprehensive development and utilization of marine space resources is gradually becoming an important direction for the coordinated development of new energy and modern fisheries. Offshore photovoltaic power generation systems, with their significant advantages such as not occupying scarce land resources, effectively utilizing clean energy from vast sea areas, and relatively stable power output, have experienced rapid development and application in nearshore and tidal flat areas in recent years. At the same time, traditional nearshore intensive aquaculture models are increasingly facing challenges due to environmental carrying capacity pressures and disease risks. Deep-sea aquaculture, with its vast development space and stronger risk resistance, is rapidly becoming an important path to improve the productivity and sustainable development level of marine fisheries.

[0003] However, traditional photovoltaic aquaculture systems face severe technical challenges in actual marine service environments, including structural safety, durability, and adaptability to extreme sea conditions. Currently, the mainstream technical solutions for floating marine photovoltaic structures mainly rely on a basic configuration of floating bodies with rigid connections, such as patent number CN117478029A. The floating bodies are mostly made of steel or concrete, and the functional modules are fixedly connected by rigid connecting components. Due to the excessive overall structural stiffness, internal forces under wave loads tend to concentrate at the connection nodes, leading to significant stress peaks in the connecting plates or weld areas, thus accelerating fatigue failure at the nodes. Simultaneously, these systems generally lack reasonable structural energy dissipation mechanisms; their resistance to extreme loads relies almost entirely on the inherent strength of the materials and components, lacking effective ways to dissipate energy through deformation or relative motion under extreme sea conditions. Therefore, their safety is significantly insufficient under harsh conditions such as typhoons and giant waves. In addition, the corrosion resistance and durability of the material system are particularly prominent issues. Steel structures rust at an extremely fast rate in the high salt spray environment of the ocean, while concrete structures face long-term performance degradation problems such as surface cracking and internal steel corrosion, resulting in high maintenance costs throughout the entire life cycle of the structure.

[0004] In addition, traditional photovoltaic aquaculture systems have attempted breakthroughs through geometric optimization or structural system transformation, such as adopting a ring structure to improve wave resistance or introducing a cable-based flexible system and foam floating structure to improve stress patterns. However, the excessive deformation of the overall structure and the difficulty in adapting to large-scale modular assembly and engineering promotion limit its widespread application in engineering practice.

[0005] A comprehensive analysis of existing technologies reveals the following common problems with floating marine photovoltaic structures: First, the connection system design is simplistic, employing either fully rigid or fully hinged connections. This fails to achieve a reasonable stiffness match and transition based on the spatial distribution and temporal characteristics of wave loads, making it difficult to achieve an effective balance between stress concentration and excessive deformation. Second, the material system follows traditional onshore engineering experience, primarily relying on steel and concrete. It fails to systematically optimize for the complex service environment of the ocean, including high corrosion, alternating loads, and biofouling, resulting in poor structural durability and high repair and replacement costs.

[0006] Therefore, existing technologies still need improvement. Summary of the Invention

[0007] In view of the shortcomings of the prior art, the purpose of this invention is to provide a semi-rigid connection marine photovoltaic aquaculture system and a method for evaluating the cross-sectional bearing capacity, aiming to solve the problem of the single connection form of existing floating photovoltaic aquaculture structures.

[0008] The semi-rigid connection marine photovoltaic aquaculture system and its cross-sectional bearing capacity assessment method provided in this application adopt the following technical solution: A semi-rigid connection marine photovoltaic aquaculture system, comprising: Several floating body modules; an assembly gap is formed between two adjacent floating body modules; A first connecting assembly is disposed in the assembly gap for connecting two adjacent floating body modules; the first connecting assembly includes a hinge and a connecting fastener; wherein the connecting fastener includes: A sliding bite plate is disposed vertically on the side wall of the float module; Guide channels are horizontally arranged on the sidewalls of adjacent floating modules; An elastic adjusting member is telescopically disposed in the guide groove; one end of the elastic adjusting member extends to the outside of the guide groove and is provided with a beak plate; the beak plate abuts against the sliding bite plate and can move up and down along the sliding bite plate; The elastic adjusting member extends and retracts along the horizontal direction of the guide groove to adjust the distance between the beak plate and the sliding bite plate, thereby adjusting the contact area between the beak plate and the sliding bite plate.

[0009] Optionally, in the semi-rigid connection marine photovoltaic aquaculture system, the connecting fastener further includes a bolt; the end of the bolt disposed in the guide groove away from the beak plate; the bolt is connected to the adjusting member for adjusting the preload of the elastic adjusting member.

[0010] Optionally, in the semi-rigid connection marine photovoltaic aquaculture system, the sliding bite plate has a first inclined surface; the beak plate has a second inclined surface; and the first inclined surface and the second inclined surface are adapted to each other.

[0011] Optionally, in the semi-rigid connection marine photovoltaic aquaculture system, at least two connecting fasteners are provided; the hinge is located in the middle of two adjacent floating modules; and at least two connecting fasteners are symmetrically arranged on both sides of the hinge.

[0012] Optionally, the semi-rigid connection marine photovoltaic aquaculture system further includes: A photovoltaic power generation system is installed on top of the floating module; The cage aquaculture system is located at the bottom of the floating module.

[0013] Optionally, in the semi-rigid connection marine photovoltaic aquaculture system, the photovoltaic power generation system includes photovoltaic panels and a support frame; the photovoltaic panels are mounted on the support frame; the support frame includes interconnected vertical columns and horizontal beams; wherein the horizontal beams and the vertical columns are semi-rigidly connected.

[0014] Optionally, in the semi-rigid connection marine photovoltaic aquaculture system, the sidewalls of the vertical column are provided with a top flange and a bottom flange at intervals; the top flange is provided with a first mounting hole; the top of the horizontal beam is provided with a first connecting hole corresponding to the first mounting hole; the bottom flange is provided with a second mounting hole; the bottom of the horizontal beam is provided with a second connecting hole corresponding to the second mounting hole; the vertical column and the horizontal beam are connected by bolts passing through the first mounting hole and the first connecting hole, and / or through the second mounting hole and the second connecting hole. Wherein, the diameter of the first connecting hole is equal to the diameter of the first assembly hole; the diameter of the second connecting hole is smaller than the diameter of the second assembly hole.

[0015] Optionally, in the semi-rigid connection marine photovoltaic aquaculture system, the floating module is made of ultra-high performance concrete, and the top and bottom of the floating module are provided with prestressed fiber-reinforced composite material ribs.

[0016] Based on the above embodiments, the present invention also discloses a method for evaluating the cross-sectional bearing capacity of a semi-rigid connection marine photovoltaic aquaculture system, comprising the following steps: The cross-section of the floating module is divided into several fiber units along the height direction; Based on the plane section assumption, the failure mode of the fiber unit is determined, and the flexural bearing capacity of several fiber units is obtained. The actual bending capacity of the floating module is calculated based on the bending capacity of several fiber units. The resistance coefficient is obtained based on the actual bending bearing capacity and the preset bending bearing capacity, and the safety of the floating module is evaluated based on the resistance coefficient.

[0017] Optionally, in the method for evaluating the cross-sectional bearing capacity of the semi-rigid connection marine photovoltaic aquaculture system, the bearing cross-section of the floating module satisfies the following relationship: ； ； in, The resultant force of the cross section of the floating module; n The number of fiber units that divide the cross-section of the floating module along the height direction; For ultra-high performance concrete sections under bending moment along the height of the first... i Stress in each fiber unit; For ultra-high performance concrete sections along the height of the first i The area of ​​each fiber unit; The stress in the bottom fiber-reinforced composite material stiffeners of the floating module under bending moment; The area of ​​the bottom fiber-reinforced composite material ribs of the floating module; The stress in the top fiber-reinforced composite material stiffeners of the floating module under bending moment; The area of ​​the fiber-reinforced composite ribs at the top of the floating module; The ultimate bearing bending moment of the floating module; The height of the ultra-high performance concrete section along the height of the i-th fiber element is the distance from the top surface of the floating module under bending moment. c The distance from the neutral axis of the cross section of the ultra-high performance concrete floating module to the top surface of the floating module under bending moment is denoted as . The height of the bottom prestressing tendon of the floating module from the top surface of the floating module; This refers to the height of the top prestressing tendon of the floating module from the top surface of the floating module.

[0018] Compared with the prior art, the embodiments of the present invention have the following advantages: This invention discloses a semi-rigid connection marine photovoltaic aquaculture system and a method for evaluating the cross-sectional bearing capacity. The semi-rigid connection marine photovoltaic aquaculture system includes several floating modules and a first connecting assembly. The first connecting assembly includes a hinge and a connecting fastener. The connecting fastener includes a sliding bite plate, a guide groove, and an elastic adjustment component. Under normal operating conditions, the beak plate and the sliding bite plate are fully abutted, forming a rigid connection between adjacent floating modules to maintain overall stability. Under extreme operating conditions, the beak plate and the sliding bite plate are disengaged, and the floating modules are connected only through the hinge to allow rotation between the floating modules and avoid stress concentration at the connection. Attached Figure Description

[0019] 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 recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the semi-rigid connection marine photovoltaic aquaculture system in the embodiments of this application; Figure 2 This is a schematic diagram of the structure of the floating module in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the first connecting component in an embodiment of this application; Figure 4 This is a schematic diagram of the node structure of the support frame in the embodiments of this application; Figure 5 This is a flowchart illustrating the steps of the method for assessing the cross-sectional bearing capacity of a semi-rigidly connected marine photovoltaic aquaculture system in this application embodiment; Figure 6 This is a cross-section of the floating module in the embodiments of this application and a schematic diagram of the unit being analyzed; Figure 7 This is a schematic diagram of the failure mode on the pressure side in an embodiment of this application; Figure 8 This is a schematic diagram of the tensile failure mode in an embodiment of this application; Figure 9 This is a schematic diagram of strain distribution in the compression side failure mode, tension side failure mode, and equilibrium mode in the embodiments of this application; Figure 10 This is a schematic diagram illustrating the basic principle of cross-sectional element analysis of the floating body module in this application embodiment; Figure 11 This is a schematic diagram of the cross-sectional analysis of the fiber unit used in the floating module of this application embodiment.

[0021] Explanation of reference numerals in the attached drawings: 1. Floating body module; 11. Assembly gap; 2. First connecting component; 21. Hinge; 22. Connecting fastener; 221. Sliding bite plate; 222. Guide groove; 223. Elastic adjustment component; 224. Bird beak plate; 225. Bolt; 3. Photovoltaic power generation system; 311. Vertical column; 3111. Top flange; 3112. Bottom flange; 3113. First assembly hole; 3114. First connecting hole; 3115. Second assembly hole; 3116. Second connecting hole; 3117. Connecting plate; 3118. Third assembly hole; 3119. Third connecting hole; 312. Horizontal beam; 33. Cover plate; 34. Gasket; 4. Net cage aquaculture system. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] The present application will be further described in detail below with reference to the accompanying drawings.

[0024] This application discloses a semi-rigid connection marine photovoltaic aquaculture system, wherein, as shown in the embodiments, Figure 1 , Figure 2 and Figure 3As shown, the system includes several floating body modules 1 and a first connecting assembly 2; an assembly gap 11 is formed between two adjacent floating body modules 1; the first connecting assembly 2 is disposed in the assembly gap 11 for connecting two adjacent floating body modules 1; the first connecting assembly 2 includes a hinge 21 and a connecting fastener 22; wherein, the connecting fastener 22 includes: a sliding meshing plate 221 disposed vertically on the side wall of the floating body module 1; a guide groove 222 disposed horizontally on the side wall of adjacent floating body modules 1; and an elastic... An adjusting member 223 is telescopically disposed within the guide groove 222; one end of the elastic adjusting member 223 extends to the outside of the guide groove 222 and is provided with a beak plate 224; the beak plate 224 abuts against the sliding bite plate 221 and can move up and down along the sliding bite plate 221; wherein, the elastic adjusting member 223 moves telescopically along the horizontal direction of the guide groove 222 to adjust the distance between the beak plate 224 and the sliding bite plate 221, thereby adjusting the contact area between the beak plate 224 and the sliding bite plate 221. Under normal working conditions, the beak plate 224 and the sliding bite plate 221 are fully abutted, so that adjacent floating blocks form a rigid connection to maintain overall stability; under extreme working conditions, the beak plate 224 and the sliding bite plate 221 are disengaged, and the floating modules 1 are only connected by hinges 21 to allow rotation between the floating modules 1, avoid stress concentration at the connection, and solve the problem of the single connection form of the existing floating photovoltaic aquaculture structure.

[0025] Specifically, an assembly gap 11 is formed between two adjacent float modules 1, and a first connecting component 2 is disposed in the assembly gap 11 to connect the two adjacent float modules 1. The first connecting component 2 includes a hinge 21 and a connecting fastener 22. The hinge 21 provides relative rotational freedom between adjacent float modules 1. The connecting fastener 22 includes a sliding bite plate 221, a guide groove 222, and an elastic adjusting component 223. The sliding bite plate 221 is fixedly disposed vertically on the side wall of the float module 1, and the guide groove 222 is disposed horizontally on the side wall of the adjacent float module 1, that is, the sliding bite plate 221 and the guide groove 222 are perpendicular to each other. The elastic adjusting component 223 is telescopically disposed inside the guide groove 222, and one end of the elastic adjusting component 223 extends outside the guide groove 222 and is provided with a beak plate 224. The beak plate 224 abuts against the sliding bite plate 221, and the beak plate 224 can move up and down in the vertical direction along the sliding bite plate 221. In use, the elastic adjustment member 223 moves horizontally along the guide groove 222, and adjusts the horizontal distance between the beak plate 224 and the sliding bite plate 221 by the extension and retraction movement, thereby changing the contact area between the beak plate 224 and the sliding bite plate 221, thereby adjusting the constraint stiffness between adjacent float modules 1.

[0026] Under normal operating conditions, the elastic adjustment member 223 remains extended, and the beak plate 224 and the sliding bite plate 221 are fully abutted with the maximum abutment area, forming a rigid connection between adjacent floating modules 1, thereby maintaining the stability of the overall structure. Under extreme operating conditions, the elastic adjustment member 223 retracts, and the abutment area between the beak plate 224 and the sliding bite plate 221 decreases or even completely disengages. At this time, adjacent floating modules 1 are only connected by the hinge member 21, allowing relative rotation between the floating modules 1, thereby avoiding stress concentration at the connection. Through the above settings, the connection stiffness between two adjacent floating modules 1 is adjusted according to external load conditions, solving the problem of the single connection form in existing floating photovoltaic aquaculture structures and realizing a semi-rigid connection.

[0027] In this embodiment, as Figure 3 As shown, the connecting fastener 22 further includes a bolt 225; the bolt 225 is disposed at the end of the guide groove 222 opposite to the beak plate 224; the bolt 225 is connected to the adjusting member and is used to adjust the preload of the elastic adjusting member 223. Specifically, the bolt 225 is disposed at the end of the guide groove 222 opposite to the beak plate 224, and the bolt 225 is connected to the elastic adjusting member 223 to adjust the preload of the elastic adjusting member 223. In actual use, the guide groove 222 has a first end and a second end disposed opposite to each other, wherein the beak plate 224 is located at the first end of the guide groove 222, and the bolt 225 is installed at the second end of the guide groove 222. One end of the elastic adjusting member 223 is connected to the beak plate 224, and the other end is connected to the bolt 225. By rotating the bolt 225, the axial position of the bolt 225 relative to the guide groove 222 is changed, thereby compressing or releasing the initial deformation of the elastic adjusting member 223 to adjust the preload stored in the elastic adjusting member 223. Therefore, the preload of the elastic adjusting member 223 can be flexibly controlled by the bolt 225, thereby flexibly adjusting the contact area and contact pressure between the beak plate 224 and the sliding meshing plate 221. When the preload of the elastic adjusting member 223 is large, the beak plate 224 is not easy to detach from the sliding meshing plate 221 under external load, and the adjacent float modules 1 maintain a high connection stiffness; when the preload is small, the beak plate 224 is more likely to retract under extreme load, allowing relative rotation between adjacent float modules 1.

[0028] In this embodiment, as Figure 3As shown, the sliding bite plate 221 has a first inclined surface; the beak plate 224 has a second inclined surface; the first inclined surface and the second inclined surface are adapted to each other. Specifically, the first inclined surface is formed on the side surface of the sliding bite plate 221 facing the adjacent float module 1, and extends inclined at a preset angle in the vertical direction; the second inclined surface is formed on the side surface of the beak plate 224 facing the sliding bite plate 221, and its inclination angle and extension direction match the first inclined surface. When the beak plate 224 and the sliding bite plate 221 are in abutting state, the first inclined surface and the second inclined surface form a surface contact fit, and the two have a consistent inclination angle, thereby ensuring that the contact stress is evenly distributed on the fit interface. In actual use, when the adjacent float modules 1 generate relative vertical displacement under the action of waves, the beak plate 224 moves up and down along the sliding bite plate 221, at which time the second inclined surface slides relative to the first inclined surface. Under normal operating conditions, the mutual wedging effect between the first and second inclined surfaces enhances the connection stability of adjacent floating modules 1 in the horizontal direction, preventing unexpected separation.

[0029] In one implementation, such as Figure 3 As shown, at least two connecting fasteners 22 are provided; the hinge 21 is disposed in the middle of two adjacent float modules 1; at least two connecting fasteners 22 are symmetrically arranged on both sides of the hinge 21. Specifically, within the assembly gap 11 formed between two adjacent float modules 1, the hinge 21 is arranged in the middle of the assembly gap 11, one end of the hinge 21 is connected to one of the float modules 1, and the other end is connected to the adjacent float module 1, thereby providing an axis of relative rotation for the two float modules 1, and at least two connecting fasteners 22 are symmetrically arranged on both sides of the hinge 21.

[0030] When adjacent floating modules 1 are subjected to external loads, the connecting fasteners 22 symmetrically arranged on both sides of the hinge 21 can form a balanced constraint moment in the horizontal plane, preventing adjacent floating modules 1 from deflecting or detaching on one side. Under normal operating conditions, the connecting fasteners 22 on both sides simultaneously maintain the complete contact between the beak plate 224 and the sliding meshing plate 221, ensuring a stable rigid connection of the overall structure in both the horizontal and vertical directions. Under extreme operating conditions, the connecting fasteners 22 on both sides can generate different degrees of elastic retraction according to the direction and magnitude of the load, thereby allowing adjacent floating modules 1 to rotate around the central hinge 21, which not only releases stress concentration at the connection but also maintains the overall stability of the structure.

[0031] In this embodiment, the hinge 21 includes a first connecting rod, a second connecting rod, and a third connecting rod. The first and second connecting rods are disposed on the side wall of one of the floating modules 1, and are connected by a vertical rod. One end of the third connecting rod is connected to the side wall of the adjacent floating module 1, and the other end is movably sleeved on the vertical rod. Under extreme conditions, when the beak plate 224 is completely disengaged from the sliding bite plate 221, the two adjacent floating modules 1 fluctuate up and down or sway left and right with the action of the waves. At this time, the third connecting rod can rotate around the axis of the vertical rod and move up and down along the extension direction of the vertical rod, thereby enabling the adjacent floating modules 1 to achieve flexible relative movement under multi-directional wave loads, thus effectively avoiding stress concentration at the connection point.

[0032] Under normal operating conditions, the beak plate 224 and the sliding bite plate 221 are in full contact. At this time, a tight surface contact is formed between the first inclined surface and the second inclined surface, and a large static friction force is generated between them, thereby restraining and suppressing the relative rotation and translation between adjacent floating body modules 1, thus ensuring that the overall structure maintains stability and consistency under normal sea conditions.

[0033] In one embodiment, the elastic adjustment element 223 is a disc spring, with one end connected to bolt 225 and the other end connected to the beak. By adjusting bolt 225, the preload of the disc spring can be changed. The change in preload directly adjusts the contact area between the beak plate 224 and the sliding meshing plate 221, thereby changing the contact area between the first inclined surface and the second inclined surface to adjust the connection stiffness of adjacent floating body modules 1. Thus, operators can precisely adjust bolt 225 according to sea conditions or site environmental parameters, thereby achieving graded or continuous control of the connection stiffness between adjacent floating body modules 1, ensuring that the semi-rigid connection marine photovoltaic aquaculture system maintains optimal structural response characteristics in different marine environments.

[0034] In this embodiment, as Figure 1 and Figure 4As shown, the semi-rigid connection marine photovoltaic aquaculture system also includes a photovoltaic power generation system 3 and a cage aquaculture system 4; the photovoltaic power generation system 3 is located at the top of the floating module 1; the cage aquaculture system 4 is located at the bottom of the floating module 1. The photovoltaic power generation system 3 includes photovoltaic panels and a support frame; the photovoltaic panels are mounted on the support frame; the support frame includes vertical columns 311 and horizontal beams 312 connected to each other; wherein, the horizontal beams 312 and the vertical columns 311 are semi-rigidly connected. Specifically, the sidewall of the vertical column 311 is provided with a top flange 3111 and a bottom flange 3112 at intervals; the top flange 3111 is provided with a first mounting hole 3113; the top of the horizontal beam 312 is provided with a first connecting hole 3114 corresponding to the position of the first mounting hole 3113; the bottom flange 3112 is provided with a second mounting hole 3115; the bottom of the horizontal beam 312 is provided with a second connecting hole 3116 corresponding to the position of the second mounting hole 3115; the vertical column 311 and the horizontal beam 312 are connected by bolts 225 passing through the first mounting hole 3113 and the first connecting hole 3114, and / or through the second mounting hole 3115 and the second connecting hole 3116; wherein, the diameter of the first connecting hole 3114 is equal to the diameter of the first mounting hole 3113; the diameter of the second connecting hole 3116 is smaller than the diameter of the second mounting hole 3115.

[0035] In this embodiment, the floating module 1 serves as a supporting base, simultaneously supporting the upper photovoltaic power generation system 3 and the lower net cage aquaculture system 4, achieving spatial integration of marine photovoltaic power generation and aquaculture. The photovoltaic power generation system 3 includes photovoltaic panels and a support frame; the photovoltaic panels are mounted on the support frame and are fixedly connected to the floating module 1 via the support frame. The support frame includes interconnected vertical columns 311 and horizontal beams 312; the horizontal beams 312 are rotatably mounted on the vertical columns 311, allowing the horizontal beams 312 to rotate and adjust relative to the vertical columns 311 within a preset angle range. The sidewalls of the vertical columns 311 are provided with a top flange 3111 and a bottom flange 3112 spaced apart along the vertical direction. The top flange 3111 has a first mounting hole 3113, and the bottom flange 3112 has a second mounting hole 3115. The horizontal beams 312 have a first connecting hole 3114 corresponding to the first mounting hole 3113 and a second connecting hole 3116 corresponding to the second mounting hole 3115. In actual use, the vertical column 311 and the horizontal beam 312 are rotatably connected by bolts 225 passing through the first assembly hole 3113 and the first connecting hole 3114, and through the second assembly hole 3115 and the second connecting hole 3116.

[0036] In this embodiment, as Figure 4As shown, the diameter of the first connecting hole 3114 is equal to the diameter of the first mounting hole 3113; the diameter of the second connecting hole 3116 is smaller than the diameter of the second mounting hole 3115. When the horizontal beam 312 connects the top flange 3111 and the bottom flange 3112, the first connecting hole 3114 and the first mounting hole 3113 are fitted with equal diameters, and the bolt 225 passes through to form a rigid connection without relative slippage. Thus, a fixed rotation fulcrum is formed between the horizontal beam 312 and the vertical column 311. At the same time, the diameter of the second connecting hole 3116 is smaller than the diameter of the second mounting hole 3115, thereby forming a slip gap between the bolt 225 and the periphery of the hole wall. In this way, the sliding clearance allows the horizontal beam 312 to rotate or micro-adjust relative to the vertical column 311 within the tolerance range defined by the second mounting hole 3115, while the clearance-free fit at the top flange 3111 forms a positioning constraint, thereby ensuring the positional stability of the photovoltaic panel under normal operating conditions. Furthermore, under the action of uneven loads or dynamic loads transmitted by waves, stress can be released through the clearance fit of the bottom flange 3112, avoiding excessive bending moments at the connection nodes.

[0037] In extreme sea conditions, when there is a large rotation between two adjacent floating modules, the semi-rigid connection nodes between the horizontal beam and the vertical column can cooperate with the rotation of the floating modules to achieve coordinated movement between the upper photovoltaic panels and the support frame. This effectively reduces damage to the overall structural system, ensuring the stability of the photovoltaic panels under normal operating conditions, and also allowing stress release through gap fit under uneven loads or wave-transmitted dynamic loads, thus avoiding excessive bending moments at the connection nodes.

[0038] In this embodiment, a connecting plate 3117 is provided between the top flange 3111 and the bottom flange 3112; the connecting plate 3117 is connected to the vertical column 311, and a third mounting hole 3118 is provided on the connecting plate 3117; a third connecting hole 3119 is provided on the horizontal beam 312 corresponding to the position of the third mounting hole 3118; the connecting plate 3117 and the horizontal beam 312 are connected by bolts 225 passing through the third mounting hole 3118 and the third connecting hole 3119. Similarly, the diameter of the third mounting hole 3118 is larger than the diameter of the third connecting hole 3119, thereby forming a preset sliding gap between the bolt 225 rod and the periphery of the hole wall. Under the action of external load, the position of the connecting plate 3117 and the horizontal beam 312 changes, and the sliding gap can accommodate the misalignment and sliding displacement generated by the connecting plate 3117 and the horizontal beam 312, thereby avoiding stress concentration at the joint.

[0039] In this embodiment, the bottom flange 3112 is connected to the cover plate 33 and the gasket 34 via bolts 225. The gasket 34 is made of a metal or non-metal material with a high coefficient of friction to provide sufficient connection rigidity under normal node operation. The bottom flange 3112, cover plate 33, and gasket 34 are stacked and locked together by bolts 225. Under the preload of the bolts 225, significant static friction is generated between the gasket 34 and the contact surfaces of the bottom flange 3112 and the cover plate 33. Under normal operating conditions, the static friction is sufficient to resist the relative slippage tendency between the horizontal beam 312 and the vertical column 311 caused by external loads, thereby providing rigid constraints for the connection node and ensuring that the photovoltaic panel maintains a stable spatial posture under normal sea conditions. Meanwhile, since a sliding gap is formed between the second connecting hole 3116 and the second mounting hole 3115, under extreme load conditions, when the external force acting on the node exceeds the maximum static friction force provided by the gasket 34, the bottom flange 3112 can overcome the friction constraint and slide relative to each other, which, together with the fixed rotation fulcrum of the top flange 3111, enables the controllable rotation of the horizontal beam 312.

[0040] In one embodiment, the floating module 1 is made of ultra-high performance concrete (UHPC), and prestressed fiber-reinforced composite material (FRP) ribs are provided at both the top and bottom of the floating module 1. Specifically, UHPC has significantly higher compressive strength than ordinary concrete and high-performance concrete, and its material density is extremely high with extremely low porosity, thus possessing excellent anti-permeability and resistance to chloride ion diffusion, effectively resisting salt spray erosion and freeze-thaw cycle damage in the marine environment. The FRP ribs have low density and high tensile strength. At the same time, the use of prestressed FRP ribs fully utilizes the material properties and prevents UHPC from cracking. This design improves the strength, ductility, crack resistance, and durability of the floating module 1.

[0041] Based on the above embodiments, such as Figure 5 As shown, this invention also discloses a method for evaluating the cross-sectional bearing capacity of a semi-rigidly connected offshore photovoltaic aquaculture system, which includes the following steps: S1. Divide the cross section of the floating module 1 into several fiber units along the height direction; S2. Based on the plane section assumption, determine the failure mode of the fiber unit and obtain the flexural bearing capacity of several fiber units; S3. Calculate the actual bending bearing capacity of the floating module 1 based on the bending bearing capacity of the fiber units; S4. Obtain the resistance coefficient based on the actual bending bearing capacity and the preset bending bearing capacity, and evaluate the safety of the floating module 1 based on the resistance coefficient.

[0042] In this embodiment, as Figure 6 As shown, the safety of the floating module 1 has a significant impact on the semi-rigid connection marine photovoltaic aquaculture system. Therefore, the safety performance of the floating structure can be evaluated by assessing the flexural bearing capacity of the floating module 1's cross-section, thereby assessing the overall safety of the semi-rigid connection marine photovoltaic aquaculture system. To calculate the flexural bearing capacity of the floating module 1's cross-section, the overall cross-section of the floating module 1 is discretized into several I-beam elements. The flexural stiffness of each I-beam element in its local coordinate system is calculated separately. Then, the flexural stiffnesses of the various I-beam elements are algebraically superimposed to obtain the total flexural stiffness of the floating module 1 at the overall cross-section level.

[0043] In the process of conducting independent section analysis on each I-beam element, the following basic assumptions are established: First, there is good bonding between the FRP reinforcement and UHPC, meaning that even without considering relative slippage at their interface, strain is continuously transferred at the interface. Second, the plane section assumption is followed, meaning that the cross-section is planar before bending deformation and remains planar after deformation, perpendicular to the deformed beam axis, thus establishing a linear strain distribution along the height direction. Finally, both the FRP reinforcement and UHPC exhibit linear stress-strain characteristics, meaning that both materials exhibit linear elastic constitutive relationships during stress until they reach their respective ultimate strength or ultimate strain. Based on these assumptions, the bending capacity of each I-beam element under ultimate conditions is obtained to determine the overall bending capacity of the floating module 1, which is then used to determine whether the semi-rigid connection marine photovoltaic aquaculture system meets the preset safety design criteria.

[0044] Specifically, in this embodiment, both the FRP reinforcement and the UHPC exhibit linear stress-strain characteristics. For example... Figure 7 , Figure 8 and Figure 9 As shown, the failure modes of the fiber unit include the compression-side failure mode, the tension-side failure mode, and the equilibrium failure mode; Among them, when ε top = ε c At that time, it was the failure mode on the compression side; among which, ε top The strain is at the top of the cross section; ε c This represents the compressive ultimate strain of the UHPC. when ε bottom = ε t At that time, the failure mode was the tensile side failure mode; among which, ε bottomThe strain is at the bottom of the cross section; ε t The tensile limit strain of UHPC; when ε top = ε c and ε bottom = ε t At this time, it is a balance disruption mode.

[0045] Specifically, such as Figure 10 and Figure 11 As shown, when the failure mode of the fiber unit is the compression-side failure mode, the following relationship is satisfied: ; ; ; in, For the UHPC section under bending moment along the height of the first i Strain of each fiber unit; For the UHPC section under bending moment along the height of the first i The height of each fiber unit from the top surface of the floating module 1; c The distance from the neutral axis of the UHPC floating module's cross-section to the top surface of the floating module under bending moment is the height of the module's cross-section. The strain is the strain at the top of the cross-section of floating module 1; The strain of the bottom FRP reinforcement of the floating module 1 under bending moment; The initial strain of the top FRP reinforcement of floating module 1 after prestressing is applied; The height of the bottom prestressed FRP reinforcement of floating module 1 from the top surface of floating module 1; The strain of the top FRP reinforcement of the floating module 1 under bending moment; The initial strain of the top FRP reinforcement of the floating module 1 after prestressing is applied; The height of the top prestressed FRP reinforcement of the floating module 1 from the top surface of the floating module 1.

[0046] When the failure mode of the fiber unit is the tensile failure mode, the following relationship is satisfied: ; ; ; in, h The cross-sectional height of floating module 1; The strain is at the bottom of the cross section of floating module 1.

[0047] The stress of the fiber unit satisfies the following relationship: ; ; ; in, For the UHPC section under bending moment along the height of the first i Stress in each fiber unit; The elastic modulus of UHPC; The stress in the bottom FRP reinforcement of the floating module 1 under bending moment; The elastic modulus of FRP reinforcement; The stress is the top FRP reinforcement of the floating module 1 under bending moment.

[0048] Therefore, according to the force balance equation, the bearing section of the floating module 1 satisfies the following relationship: ； ； in, The resultant force of the cross section of floating module 1; n The number of fiber units that divide the cross section of floating module 1 along the height direction; For the UHPC section under bending moment along the height of the first i Stress in each fiber unit; For the UHPC section along the height of the first i The area of ​​each fiber unit; The stress in the bottom FRP reinforcement of the floating module 1 under bending moment; The area of ​​the bottom FRP reinforcement of floating module 1; The stress in the top FRP reinforcement of the floating module 1 under bending moment; The area of ​​the top FRP reinforcement of floating module 1; The ultimate bearing bending moment of floating module 1; For the UHPC section under bending moment along the height of the first i The height of each fiber unit from the top surface of the floating module 1; c The distance between the neutral axis of the cross section of the UHPC floating module 1 and the top surface of the floating module 1 under bending moment is the height of the cross section. The height of the bottom prestressing tendon of floating module 1 from the top surface of floating module 1; The height of the top prestressing tendon of the floating module 1 from the top surface of the floating module 1 is given. This determines the actual bending bearing capacity of the floating module 1. In this embodiment, a resistance coefficient is obtained based on the actual bending bearing capacity and the preset bending bearing capacity, and the safety of the floating module 1 is evaluated based on the resistance coefficient. Specifically, using a resistance coefficient design, when the ratio of the preset bending bearing capacity to the actual bending bearing capacity is greater than or equal to 1.3, the safety of the floating module 1 meets the standard.

[0049] In summary, this invention discloses a semi-rigid connection marine photovoltaic aquaculture system and a method for evaluating the cross-sectional bearing capacity. The semi-rigid connection marine photovoltaic aquaculture system includes several floating modules and a first connecting component. An assembly gap is formed between two adjacent floating modules. The first connecting component is disposed in the assembly gap for connecting two adjacent floating modules. The first connecting component includes a hinge and a connecting fastener. The connecting fastener includes a sliding bite plate, a guide groove, and an elastic adjusting component. The sliding bite plate is disposed vertically on the side wall of the floating module. The guide groove is disposed horizontally on the side wall of adjacent floating modules. The elastic adjusting component is retractably disposed in the guide groove. One end of the elastic adjusting component extends outside the guide groove and is provided with a beak plate. The beak plate abuts against the sliding bite plate and can move up and down along the sliding bite plate. The elastic adjusting component moves horizontally along the guide groove to adjust the distance between the beak plate and the sliding bite plate, thereby adjusting the contact area between the beak plate and the sliding bite plate. Under normal operating conditions, the beak plate and the sliding bite plate are fully engaged, forming a rigid connection between adjacent floating blocks to maintain overall stability. Under extreme operating conditions, the beak plate and the sliding bite plate are disengaged, and the floating modules are connected only by hinges to allow rotation between the floating modules, avoiding stress concentration at the connection points and solving the problem of the single connection form in existing floating photovoltaic aquaculture structures.

[0050] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0051] It should be noted that this invention uses a semi-rigid connection marine photovoltaic aquaculture system as an example to introduce the specific structure and working principle of the invention. However, the application of this invention is not limited to the semi-rigid connection marine photovoltaic aquaculture system, and can also be applied to the production and use of other similar products.

[0052] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A semi-rigid connection marine photovoltaic aquaculture system, characterized in that, include: Several floating body modules; an assembly gap is formed between two adjacent floating body modules; A first connecting assembly is disposed in the assembly gap for connecting two adjacent floating body modules; the first connecting assembly includes a hinge and a connecting fastener; wherein the connecting fastener includes: A sliding bite plate is disposed vertically on the side wall of the float module; Guide channels are horizontally arranged on the sidewalls of adjacent floating modules; An elastic adjusting member is telescopically disposed in the guide groove; one end of the elastic adjusting member extends to the outside of the guide groove and is provided with a beak plate; the beak plate abuts against the sliding bite plate and can move up and down along the sliding bite plate; The elastic adjusting member extends and retracts along the horizontal direction of the guide groove to adjust the distance between the beak plate and the sliding bite plate, thereby adjusting the contact area between the beak plate and the sliding bite plate.

2. The semi-rigid connection marine photovoltaic aquaculture system according to claim 1, characterized in that, The connecting fastener also includes a bolt; the end of the bolt disposed in the guide groove away from the beak plate; the bolt is connected to the adjusting member and is used to adjust the preload of the elastic adjusting member.

3. The semi-rigid connection marine photovoltaic aquaculture system according to claim 2, characterized in that, The sliding bite plate has a first inclined surface; the beak plate has a second inclined surface; the first inclined surface and the second inclined surface are adapted to each other.

4. The semi-rigid connection marine photovoltaic aquaculture system according to claim 1, characterized in that, The connecting fasteners are provided in at least two; the hinge is located in the middle of two adjacent floating modules; at least two connecting fasteners are symmetrically arranged on both sides of the hinge.

5. The semi-rigid connection marine photovoltaic aquaculture system according to claim 1, characterized in that, The semi-rigid connection marine photovoltaic aquaculture system also includes: A photovoltaic power generation system is installed on top of the floating module; The cage aquaculture system is located at the bottom of the floating module.

6. The semi-rigid connection marine photovoltaic aquaculture system according to claim 5, characterized in that, The photovoltaic power generation system includes photovoltaic panels and a support frame; the photovoltaic panels are mounted on the support frame; the support frame includes vertical columns and horizontal beams connected to each other; wherein the horizontal beams are semi-rigidly connected to the vertical columns.

7. The semi-rigid connection marine photovoltaic aquaculture system according to claim 6, characterized in that, The vertical column has a top flange and a bottom flange spaced apart on its sidewall; the top flange has a first mounting hole; the top of the horizontal beam has a first connecting hole corresponding to the first mounting hole; the bottom flange has a second mounting hole; the bottom of the horizontal beam has a second connecting hole corresponding to the second mounting hole; the vertical column and the horizontal beam are connected by bolts passing through the first mounting hole and the first connecting hole, and / or through the second mounting hole and the second connecting hole. Wherein, the diameter of the first connecting hole is equal to the diameter of the first assembly hole; the diameter of the second connecting hole is smaller than the diameter of the second assembly hole.

8. The semi-rigid connection marine photovoltaic aquaculture system according to any one of claims 1 to 7, characterized in that, The floating module is made of ultra-high performance concrete, and the top and bottom of the floating module are provided with prestressed fiber-reinforced composite material ribs.

9. A method for evaluating the cross-sectional bearing capacity of a semi-rigidly connected marine photovoltaic aquaculture system, characterized in that, Includes the following steps: The cross-section of the floating module is divided into several fiber units along the height direction; Based on the plane section assumption, the failure mode of the fiber unit is determined, and the flexural bearing capacity of several fiber units is obtained. The actual bending capacity of the floating module is calculated based on the bending capacity of several fiber units. The resistance coefficient is obtained based on the actual bending bearing capacity and the preset bending bearing capacity, and the safety of the floating module is evaluated based on the resistance coefficient.

10. The method for evaluating the cross-sectional bearing capacity of a semi-rigidly connected offshore photovoltaic aquaculture system according to claim 9, characterized in that, The load-bearing cross section of the floating module satisfies the following relationship: ； ； in, The resultant force of the cross section of the floating module; n The number of fiber units that divide the cross-section of the floating module along the height direction; For ultra-high performance concrete sections under bending moment along the height of the first... i Stress in each fiber unit; For ultra-high performance concrete sections along the height of the first i The area of ​​each fiber unit; The stress in the bottom fiber-reinforced composite ribs of the floating module under bending moment; The area of ​​the bottom fiber-reinforced composite material rib of the floating module; The stress in the top fiber-reinforced composite rib of the floating module under bending moment; The area of ​​the fiber-reinforced composite rib at the top of the floating module; The ultimate bearing bending moment of the floating module; For ultra-high performance concrete sections under bending moment along the height of the first... i The height of each fiber unit from the top surface of the floating module; c The distance from the neutral axis of the cross section of the ultra-high performance concrete floating module to the top surface of the floating module under bending moment is denoted as . The height of the bottom prestressed fiber-reinforced composite material rib of the floating module from the top surface of the floating module; The height of the prestressed fiber-reinforced composite material rib at the top of the floating module from the top surface of the floating module.

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