A kind of mechanical property detection device and method of curve type carbon fiber composite mooring cable

Abstract

The present application relates to a kind of carbon fiber composite mooring cable mechanical property detection device and method of curve type, device main body is curve-shaped steel frame, and left and right two limbs are symmetrically arranged about axis. Steel frame top and bottom are respectively welded and high-strength screw connection panel to improve structural strength. Limiting component is set on the left and right two limbs of steel frame, the displacement and form of cable are limited, ensure that cable is in the interval between limb simulation cable form under actual service condition. Through hole jack is used at the end of steel frame, and cable tension is detected by tension meter, while the amount of anchoring slip in the process of cable tension is detected by fiber optic sensor in anchoring slip detection device installed at the end of anchor. The present application simulates the curve form of carbon fiber composite mooring cable in actual marine environment, so that the detection result is closer to the actual service condition of mooring cable, and the automatic and high-precision detection of anchoring slip amount is realized.

Description

Technical Field

[0001] The present invention relates to the field of marine engineering technology, and in particular to a device and method for detecting the mechanical properties of a curved carbon fiber composite mooring cable. Background Art

[0002] Offshore floating structures are crucial infrastructure for marine energy development, marine scientific research, and marine engineering construction. They play a crucial role in supporting the marine economy and protecting the marine environment. Mooring cables, a key component of offshore floating structures, transmit wind, wave, and current loads to the seabed. Their inherent strength and rigidity limit the structure's motion response, ensuring safe and stable operation and production in harsh marine environments.

[0003] Carbon fiber composites have the characteristics of light weight, high strength, corrosion resistance, fatigue resistance, and low creep. They can also be a suitable material for marine mooring cables, especially in major marine structural projects. However, this material has not been widely used in mooring cables. Carbon fiber composite mooring cables are a new type of mooring cable, and their mechanical properties need to be tested. Only after passing the test can they be promoted and applied. Driven by the urgent demand for the construction of related major marine structural projects, it is necessary to use certain devices and methods to test the performance of carbon fiber composite mooring cables.

[0004] The inspection and testing of cable performance is a common practice in both marine and structural engineering. In marine engineering, mooring system testing is typically performed using flume or pool tests. Typically, a scaled-down model of the floating platform and its mooring system is constructed and placed in a flume or pool. Wave-generating devices are used to simulate the load and motion responses of the floating platform in a marine environment. However, this method targets the floating platform, not the mooring cables. Flume or pool tests require scaling the floating platform and mooring system according to the Froude similarity criterion. While meeting the scale ratio requirements for the median size, the mooring cables typically undergo a stiffness conversion. This stiffness change completely alters their material properties, making the material of the scaled mooring cable completely inconsistent with the prototype. While this method ensures that the load and motion responses of the floating platform are proportional to the prototype, the relevant performance parameters of the mooring cable are completely unrelated to the prototype, and the test results are not consistent with the prototype cable. This method is completely incapable of testing the performance of the target mooring cable.

[0005] From the perspective of structural engineering, existing cable mechanical performance tests usually use universal testing machines or structural testing machines. In addition, cable mechanical performance tests can also use a jack and a reaction frame to perform tension tests, thereby detecting the strength and stiffness of the cable. However, the axis of the currently available testing device is a horizontal or vertical straight line. Usually, mooring cables are in the form of curves due to the combined effects of gravity and buoyancy in service. It is difficult for linear testing devices to reproduce the actual stress state of mooring cables in the marine environment. Therefore, there is a need for a device that can simulate the curved shape of mooring cables in the marine environment to test the actual stress conditions of mooring cables in the marine environment.

[0006] In addition to testing the stiffness and strength of the carbon fiber composite mooring cable, it is also necessary to test the anchoring performance of the anchor. Good anchoring performance is the key to ensuring that the cable will not fail to anchor during service, thereby causing safety accidents. The anchor slip of the anchor is measured through tensioning testing, that is, the slip of the internal carbon fiber composite rod relative to the anchor cup. Generally, three of the carbon fiber composite rods led out from the end of the cable are selected, and a ruler or vernier caliper is used to measure the distance from the end of the three rods to the outer end face of the anchor cup. The measured distances are then averaged to obtain the anchor slip. This method is highly subjective and has low accuracy due to manual operation and reading. Moreover, during the test, the measurement personnel need to repeatedly measure during the load holding stage after each level of tensioning, which is time-consuming and labor-intensive. Therefore, a time-saving and labor-saving, highly objective, and highly accurate anchor slip detection method is needed.

[0007] Currently, there is no mechanical performance testing device that can simulate the curved morphology of carbon fiber composite mooring cables during service, and the accuracy of the anchoring performance testing method is low. In response to the actual needs of carbon fiber composite mooring cables, it is necessary to design relevant testing equipment to simulate their curved morphology in marine environments, test the mechanical properties of carbon fiber composite mooring cables, understand their mechanical performance parameters and evaluate their anchoring performance, so as to verify the applicability of carbon fiber composite mooring cables as a new type of mooring form. Summary of the Invention

[0008] In response to the above technical problems, the present invention proposes a curved carbon fiber composite mooring cable mechanical property testing device. The device can simulate the curved shape of the carbon fiber composite mooring cable in the marine environment and detect the mechanical properties such as stiffness and strength of the mooring cable. At the same time, it combines advanced fiber optic sensing technology to intelligently detect the anchor slippage of the anchor.

[0009] In order to solve the above technical problems, the present invention adopts the following technical means:

[0010] A curved carbon fiber composite mooring cable mechanical properties testing device, comprising:

[0011] The steel frame has a curved axis and includes a left limb and a right limb arranged symmetrically, with a certain distance between the left limb and the right limb for placing carbon fiber composite mooring cables;

[0012] Limiting assemblies, including a plurality of pairs, the plurality of pairs of limiting assemblies being evenly spaced and connected between the left and right limbs along the axis of the steel frame, for limiting the axial, circumferential, and radial displacements of the carbon fiber composite mooring cable in the steel frame after the carbon fiber composite mooring cable is placed in the steel frame;

[0013] A first anchor is provided at the end of one end of the carbon fiber composite mooring cable extending from one end of the steel frame, and the first anchor is fixedly connected to the first steel frame end plate at one end of the steel frame through a first nut assembly;

[0014] A second anchor is provided at the end of the other end of the carbon fiber composite mooring cable extending from the other end of the steel frame, and a second nut assembly is threadedly connected to the second anchor;

[0015] A second steel frame end plate is provided at the other end of the steel frame, and a through-type jack and a cable tension meter are sequentially connected in series along the upper portion of the carbon fiber composite mooring cable extending from the other end of the steel frame, from the second steel frame end plate to the second nut assembly;

[0016] a first anchor slippage detection assembly connected to one end of the first anchor;

[0017] a second anchor slippage detection assembly connected to one end of the second anchor;

[0018] The first anchor slip detection assembly and the second anchor slip detection assembly have the same structure and both include:

[0019] a fixing plate, fixedly connected to the end of the anchor;

[0020] One end of the flexible sheet material is fixed to the end of the carbon fiber composite rod led from the anchor, and the other end is fixed to the fixed plate. The optical fiber sensor is pasted on the flexible sheet material along the axis direction of the anchor.

[0021] Furthermore, a tie plate is welded at the bottom between the left limb and the right limb. When the cable is tensioned, the top of the left limb and the top of the right limb are respectively connected to the tie plate by high-strength screws to enhance the stability of the steel frame structure during testing.

[0022] Furthermore, each pair of the limit assemblies includes:

[0023] a first adjusting screw, one end of which passes through a reserved hole in the left limb and is fixedly connected to a first contact head on one side of the carbon fiber composite mooring cable via a first fixing nut; and the other end of the first adjusting screw extends out of the reserved hole in the left limb and is threadedly connected to the first adjusting nut;

[0024] a first crossbeam, pressing on an outer side of the first fixing nut;

[0025] a first adjusting screw passing through the crossbeam and being threadedly connected to the left limb;

[0026] A second adjusting screw, one end of which passes through a reserved hole on the right limb and is fixedly connected to a second contact head on the other side of the carbon fiber composite mooring cable via a second fixing nut, and the other end of the second adjusting screw extends out of the reserved hole on the right limb and is threadedly connected to the second adjusting nut;

[0027] a second crossbeam, pressing on an outer side of the second fixing nut;

[0028] The second adjusting screw passes through the second crossbeam and is threadedly connected to the right limb.

[0029] Furthermore, the left limb and the right limb are both made of cold-bent hollow rectangular steel.

[0030] Furthermore, the first contact head and the second contact head are bilaterally symmetrical about the axis of the steel frame and form a groove, and the edges of the contact heads are rounded to prevent damage to the surface of the carbon fiber composite mooring cable body.

[0031] Furthermore, three carbon fiber composite rods are selected to adhere the flexible sheet material, the center points of the three carbon fiber composite rods are equidistant from the center of the anchor, and the lines connecting the center points of the three carbon fiber composite rods and the center of the anchor are 120° to each other.

[0032] Furthermore, the first contact head and the second contact head are both formed by bending thin steel plates.

[0033] Furthermore, flexible rubber material is adhered to the contact surfaces of the first contact head and the second contact head with the cable body of the carbon fiber composite mooring cable.

[0034] Furthermore, the present invention proposes a detection method based on the curved carbon fiber composite mooring cable mechanical property detection device.

[0035] S1. Control the through-type jack to perform tension test on the carbon fiber composite mooring cable according to a certain loading system, and measure the tension of the carbon fiber composite mooring cable by using a cable force meter;

[0036] At the same time, when the carbon fiber composite mooring cable is tensioned, the anchor slip of the anchor causes the carbon fiber composite rod to slide, which in turn drives the deformation of the flexible sheet material. The deformation of the flexible sheet material detected by the optical fiber sensor is then converted into the anchor slip amount;

[0037] S2. If the shape of the carbon fiber composite mooring cable needs to be readjusted, loosen the limit assembly to adjust the shape of the carbon fiber composite mooring cable. After the adjustment is completed, tension the carbon fiber composite mooring cable and conduct a test in the same manner as in step S1. The carbon fiber composite mooring cable performance testing device is placed in a test tank, so that the carbon fiber composite mooring cable body and the anchors at both ends are completely immersed in water. The performance of the mooring cable is tested underwater according to a certain load system to simulate the actual working conditions of the carbon fiber composite mooring cable in the marine environment.

[0038] The above technical solution of the present invention has the following advantages over the prior art:

[0039] First, the curved carbon fiber composite mooring cable mechanical properties testing device described in the present invention, by modifying the traditional cable tensioning device, creates a device that can simulate the curved shape of carbon fiber composite mooring cables in the marine environment, solving the bottleneck of carbon fiber composite mooring cable performance testing in the fields of marine engineering and structural engineering.

[0040] Second, the curved carbon fiber composite mooring cable mechanical property testing device described in the present invention can be operated in a laboratory or immersed in a test pool to perform mechanical property tests in an underwater environment. It can simulate the actual service environment of the carbon fiber composite mooring cable, making the performance test results of the carbon fiber composite mooring cable more in line with actual conditions.

[0041] Third, the curved carbon fiber composite mooring cable mechanical property testing device described in the present invention converts anchor slip into deformation of flexible materials, and then measures the deformation of the flexible material based on advanced fiber optic sensing technology, eliminating the operation of manual measurement readings and realizing automated and high-precision detection of the anchor slip of mooring cable anchors. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the overall structure of a curved carbon fiber composite mooring cable mechanical properties testing device of the present invention;

[0043] Among them, 1-1, first nut; 2-1, first anchor slip detection device; 3-1, first anchor; 4-1, first pad; 1-2, second nut; 2-2, second anchor slip detection device; 3-2, second anchor; 4-2, second pad; 4-3, third compression pad; 5, carbon fiber composite mooring cable body; 6, steel frame; 7, limit assembly; 8, pad; 9, through-type jack; 10, cable force meter;

[0044] Figure 2 This is a schematic diagram of the steel frame and the limit assembly installation of the present invention;

[0045] Among them, 61-1, the first steel frame end plate; 61-2, the second steel frame end plate; 62, the top gusset plate; 63, the left limb; 64, the right limb; 65, the high-strength screw;

[0046] Figure 3 is a schematic cross-sectional view of a steel frame of the present invention;

[0047] Among them, 66, bottom gusset plate;

[0048] Figure 4 It is a partial enlarged view of the limit assembly of the present invention;

[0049] Among them, 71, crossbeam; 72, adjusting nut; 73, adjusting screw; 74, contact head;

[0050] Figure 5 is a schematic cross-sectional view of the position limiting assembly of the present invention;

[0051] Among them, 75, adjusting screw; 76, fixing nut;

[0052] Figure 6 Schematic diagram of the composition of the anchor slip detection device of the present invention;

[0053] Among them, 21, fixing plate; 22, connecting screw; 23, positioning nut; 24, flexible aluminum sheet; 25, optical fiber sensor; 3, anchor; 31, carbon fiber composite rod; 32, housing; 33, packaging screw; 34, anchor end cap;

[0054] Figure 7 is a schematic diagram of the end portion of the anchor slip detection device of the present invention;

[0055] Figure 8 Schematic diagram of the underwater environment test state of the curved carbon fiber composite mooring cable mechanical property testing device of the present invention;

[0056] Among them, 11. Test pool. DETAILED DESCRIPTION

[0057] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0058] Reference Figure 1 As shown, this invention, based on the National Key R&D Program project "Carbon Fiber Composite Mooring Cables for Major Offshore Structures and Key Application Technologies" (2023YFB3711500), provides a device for testing the mechanical properties of curved carbon fiber composite mooring cables. The device simulates the curved shape of mooring cables in actual marine environments, applies loads to the cables using a jack and reaction frame, and uses sensors to detect the strength and stiffness of the mooring cables. Furthermore, advanced fiber optic sensing technology is used to automatically and accurately detect the anchor slippage of carbon fiber composite mooring cable anchors.

[0059] like Figure 1 As shown, the present invention provides a curved carbon fiber composite mooring cable mechanical property testing device, the device body is a steel frame 6, and its axis is curved.

[0060] like Figure 2 As shown, the steel frame 6 is designed as a lattice structure, with the left and right legs 63 and 64 arranged symmetrically about the axis. A certain distance separates the left and right legs 63 and 64, which is used to accommodate the carbon fiber composite mooring cable 5. A first steel frame end plate 61-1 is welded to one end of the steel frame, and a second steel frame end plate 61-2 is welded to the other end.

[0061] like Figure 3 As shown, a bottom gusset plate 66 is welded between the left and right legs 63, 64. During cable installation, the carbon fiber composite mooring cable body 5 is inserted into the steel frame 6 through the gap between the left and right legs 63, 64. When tensioning the cable, the tops of the left and right legs 63, 64 are connected to the top gusset plate 62 via high-strength screws 65.

[0062] Specifically, multiple groups of limiting components 7 are provided on the left limb 63 and the right limb 64 ​​to limit the displacement and shape of the cable, ensuring that the cable takes a curved shape within the interval between the limbs.

[0063] like Figure 4 and 5 As shown, the limit assembly includes:

[0064] a first adjusting screw, one end of which passes through a reserved hole in the left limb and is fixedly connected to a first contact head on one side of the carbon fiber composite mooring cable via a first fixing nut; and the other end of the first adjusting screw extends out of the reserved hole in the left limb and is threadedly connected to the first adjusting nut;

[0065] a first crossbeam, pressing on an outer side of the first fixing nut;

[0066] a first adjusting screw passing through the crossbeam and being threadedly connected to the left limb;

[0067] A second adjusting screw, one end of which passes through a reserved hole on the right limb and is fixedly connected to a second contact head on the other side of the carbon fiber composite mooring cable via a second fixing nut, and the other end of the second adjusting screw extends out of the reserved hole on the right limb and is threadedly connected to the second adjusting nut;

[0068] a second crossbeam, pressing on an outer side of the second fixing nut;

[0069] The second adjusting screw passes through the second crossbeam and is threadedly connected to the right limb.

[0070] Specifically, when a tension test is performed on a carbon fiber composite mooring cable with anchors at both ends, the first anchor 3-1 at one end passes through the first steel frame end plate 61-1, the first nut 1-1 is threadedly connected to the first anchor 3-1, and the first pad 4-1 is fixed on the first steel frame end plate 61-1.

[0071] A pad 8 is installed on the second steel frame end plate 61-2 at the other end of the steel frame, a through-type jack 9 is installed on the pad 8, and then a tension meter 10 is installed. The second pad 4-2 is pressed down below the tension meter 10, and the third pressing pad 4-3 is placed above the tension meter 10.

[0072] The cable passes through the second steel frame end plate 61-2 and passes through the pad 8, through-hole jack 9, second spacer 4-2, and cable tension meter 10. A second nut 1-2 is threaded onto the second anchor 3-2, compressing the third spacer 4-3, which in turn compresses the cable tension meter 10 and through-hole jack 9 below.

[0073] Specifically, before the cable is tensioned, an anchor slip detection device is installed at the end of the anchor, such as Figure 6 As shown, the fixing plate 21 and the anchor end cover 34 are spaced a certain distance apart and connected by a connecting screw 22 , and a pair of positioning nuts 23 clamp the fixing plate 21 to fix the position of the fixing plate 21 .

[0074] One end of a flexible aluminum sheet 24 is attached to the end of a carbon fiber composite rod 31 extending from the anchor, and the other end is attached to the inside of a fixed plate 21. A fiber optic sensor 25 is attached to the flexible aluminum sheet 24 along its axis. When the carbon fiber composite mooring line is tensioned, anchor slip causes the carbon fiber composite rod 31 to slide, which in turn causes the flexible aluminum sheet 24 to deform. This deformation, detected by the fiber optic sensor 25, is then converted into the amount of anchor slip.

[0075] Specifically, the left branch 63 and the right branch 64 of the steel frame 6 are made of cold-bent hollow rectangular structural steel.

[0076] Specifically, the contact heads 74 of a pair of limit assemblies 7 are symmetrical on the left and right sides of the axis of the steel frame 6 and form a groove, such as Figure 4 As shown, the edges of the contact head 74 are rounded to prevent damage to the surface of the carbon fiber composite mooring cable body 5.

[0077] Specifically, when adjusting the position of the limit assembly 7, remove the adjusting screw 75 and the crossbeam 71 in turn, loosen the adjusting nut 72, push and pull the adjusting screw 73 to a new position, re-tighten the adjusting nut 72, and install the crossbeam 71 and the adjusting screw 75.

[0078] Specifically, three carbon fiber composite rods 31 are selected to stick the flexible aluminum sheet 24, such as Figure 7 As shown, the distances between the center points of the three rods and the center of the anchor should be approximately equal, and the lines connecting the center points of the three rods and the center of the anchor should be 120° to each other.

[0079] Specifically, the contact head 74 of the limiting assembly 7 is formed by bending a thin steel plate.

[0080] Specifically, a flexible rubber material may be adhered to the contact surface between the outer side of the contact head 74 and the carbon fiber composite mooring cable body 5 .

[0081] Specifically, if Figure 8 As shown, the entire device can be placed in a test pool 11 and fully immersed in water to perform mechanical property tests, simulating the underwater service state of the cable.

[0082] The following describes in detail a device for detecting mechanical properties of a curved carbon fiber composite mooring cable according to the present invention in conjunction with specific embodiments.

[0083] Example 1

[0084] In the laboratory, relevant profiles and sensors are used to make and build Figure 1 The carbon fiber composite mooring cable performance tester shown here tests the performance of a 2.1m long carbon fiber composite mooring cable with 160mm anchors at each end. One anchor passes through the first steel frame end plate 61-1. A first nut 1-1 is threadedly connected to the first anchor 3-1, and a first spacer 4-1 is secured to the first steel frame end plate 61-1.

[0085] The carbon fiber composite mooring cable body 5 is inserted into the steel frame 6 through the gap between the left and right legs 63, 64. A pad 8 is installed on the second steel frame end plate 61-2 at the other end of the steel frame. A through-type jack 9 is installed on the pad 8, followed by a tension meter 10. The second pad 4-2 is pressed against the tension meter 10, and a third pad 4-3 is placed above the tension meter 10. The carbon fiber composite mooring cable body 5 passes through the second steel frame end plate 61-2 and passes through the pad 8, through-type jack 9, second pad 4-2, and tension meter 10. A second nut 1-2 is threaded onto the second anchor 3-2, compressing the third pad 4-3, which in turn compresses the tension meter 10 and through-type jack 9 below.

[0086] The displacement and shape of the carbon fiber composite mooring cable body 5 are limited by the limiting component 75 to ensure that the carbon fiber composite mooring cable body 5 is in a curved shape within the interval between the left branch 63 and the right branch 64. Figure 5 As shown, the contact head 74 of the limiting assembly 7 is formed by bending a thin steel plate.

[0087] The adjusting screw 75 of the limit assembly 7 passes through the reserved holes in the left and right legs 63 and 64 of the steel frame 6. The adjusting screw 75 presses against the inside of the contact head 74. The fixing nut 76 is tightened from the inside of the contact head 74, securing the contact head 74 to one end of the adjusting screw 73. The adjusting screw 73 is pushed and pulled until the contact head 74 presses against the carbon fiber composite mooring cable body 5 and reaches the predetermined position. The adjusting nut 72 is then tightened. The adjusting nut 72 is then pressed against the crossbeam 71, and the adjusting screw 75 is tightened onto the crossbeam 71.

[0088] Anchor slip detection device is installed at the end of the anchor, such as Figure 6 As shown, the fixing plate 21 and the anchor end cover 34 are spaced a certain distance apart and connected by a connecting screw 22 , and a pair of positioning nuts 23 clamp the fixing plate 21 to fix the position of the fixing plate 21 .

[0089] like Figure 7 As shown, one end of a flexible aluminum sheet 24 is attached to the ends of three carbon fiber composite rods 31 extending from the anchor 3. The center points of the three carbon fiber composite rods 31 should be approximately equidistant from the center of the anchor 3, and the lines connecting the center points of the three carbon fiber composite rods 31 and the center of the anchor 3 should be 120° apart. The other end of the flexible aluminum sheet 24 is attached to the inside of the fixed plate 21, and a fiber optic sensor 25 is attached to the flexible aluminum sheet 24 along its axis.

[0090] The through-hole jack 9 is controlled to perform a tension test on the cable according to a specific loading regime, and the cable tension is measured using a cable force meter 10. Simultaneously, when the cable is tensioned, the anchor slippage of the anchor causes the carbon fiber composite rod 31 to slide, which in turn causes the flexible aluminum sheet 24 to deform. This deformation of the flexible aluminum sheet 24 is detected by the fiber optic sensor 25 and converted into the amount of anchor slippage.

[0091] Example 2

[0092] If the shape of the carbon fiber composite mooring cable body 5 needs to be readjusted, the position of the limit assembly 7 is adjusted by removing the adjustment screw 75 and crossbeam 71, loosening the adjustment nut 72, pushing and pulling the adjustment screw 73 to the new position, re-tightening the adjustment nut 72, and installing the crossbeam 71 and adjustment screw 75. After adjustment, the cable is tensioned and tested according to the same steps as in Example 1.

[0093] Example 3

[0094] The carbon fiber composite mooring cable performance test device is placed in the test pool 11 as a whole. Figure 5 As shown, the carbon fiber composite mooring cable body 5 and the anchors at both ends are completely immersed in water, and the performance of the mooring cable is tested underwater according to a certain loading system to better simulate the actual working conditions of the mooring cable in the marine environment.

[0095] This invention simulates the curved morphology of carbon fiber composite mooring cables in marine environments and can be used in both laboratory and test tank environments. In particular, it can conduct mechanical property tests in underwater environments, better simulating the actual service environment of carbon fiber composite mooring cables, making the performance test results more consistent with actual conditions. This invention uses advanced fiber optic sensing technology to measure the anchor slip of mooring cable anchors, achieving automated and high-precision detection of anchor slip.

[0096] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A curved carbon fiber composite mooring cable mechanical properties testing device, characterized in that: include: The steel frame has a curved axis and includes a left limb and a right limb arranged symmetrically, with a certain distance between the left limb and the right limb for placing carbon fiber composite mooring cables; The limiting components include a plurality of pairs, each of which is evenly spaced along the axis of the steel frame and connected between the left and right limbs to limit the displacement and shape of the cable, ensuring that the cable is in a curved shape within the interval between the limbs; A first anchor is provided at the end of one end of the carbon fiber composite mooring cable extending from one end of the steel frame, and the first anchor is fixedly connected to the first steel frame end plate at one end of the steel frame through a first nut assembly; A second anchor is provided at the end of the other end of the carbon fiber composite mooring cable extending from the other end of the steel frame, and a second nut assembly is threadedly connected to the second anchor; A second steel frame end plate is provided at the other end of the steel frame, and a through-type jack (9) and a cable tension meter (10) are sequentially connected in series along the second steel frame end plate to the second nut assembly on the carbon fiber composite mooring cable extending from the other end of the steel frame; a first anchor slippage detection assembly connected to one end of the first anchor; a second anchor slippage detection assembly connected to one end of the second anchor; The first anchor slip detection assembly and the second anchor slip detection assembly have the same structure and both include: a fixing plate fixedly connected to the end of the anchor; The fixing plate and the end of the anchor are spaced a certain distance apart and connected by a connecting screw. A pair of positioning nuts clamp the fixing plate to fix the position of the fixing plate; A flexible sheet material is fixed at one end to the end of a carbon fiber composite rod extending from the anchor, and at the other end to the fixing plate. A fiber optic sensor is attached to the flexible sheet material along the axis of the anchor. When the carbon fiber composite mooring line is tensioned, anchor slippage causes the carbon fiber composite rod to slide, which in turn causes the flexible sheet material to deform. The deformation of the flexible sheet material detected by the fiber optic sensor is then converted into an amount of anchor slippage. A connecting plate is welded between the left limb and the right limb. When the cable is tensioned, the left limb and the right limb are respectively connected to the connecting plate by high-strength screws to enhance the stability of the steel frame structure during testing.

2. The curved carbon fiber composite mooring cable mechanical properties testing device according to claim 1, characterized in that: Each pair of the limit assemblies comprises: a first adjusting screw, one end of which passes through a reserved hole on the left limb and is fixedly connected to a first contact head on one side of the carbon fiber composite mooring cable via a first fixing nut; the other end of the first adjusting screw extends out of the reserved hole on the left limb and is threadedly connected to the first adjusting nut; a first crossbeam, pressing on an outer side of the first fixing nut; a first adjusting screw passing through the crossbeam and being threadedly connected to the left limb; A second adjusting screw, one end of which passes through a reserved hole on the right limb and is fixedly connected to a second contact head on the other side of the carbon fiber composite mooring cable via a second fixing nut, and the other end of the second adjusting screw extends out of the reserved hole on the right limb and is threadedly connected to the second adjusting nut; a second crossbeam, pressing on an outer side of the second fixing nut; The second adjusting screw passes through the second crossbeam and is threadedly connected to the right limb.

3. The curved carbon fiber composite mooring cable mechanical properties testing device according to claim 1, characterized in that: The left limb and the right limb are both made of cold-bent hollow rectangular steel.

4. The curved carbon fiber composite mooring cable mechanical properties testing device according to claim 2, characterized in that: The first contact head and the second contact head are symmetrical about the axis of the steel frame and form a groove. The edges of the contact heads are rounded to prevent damage to the surface of the carbon fiber composite mooring cable body.

5. The curved carbon fiber composite mooring cable mechanical property testing device according to claim 1, characterized in that: Three carbon fiber composite rods are selected to stick the flexible sheet material, the center points of the three carbon fiber composite rods are equidistant from the center of the anchor, and the lines connecting the center points of the three carbon fiber composite rods and the center of the anchor are 120 degrees to each other.

6. The curved carbon fiber composite mooring cable mechanical property testing device according to claim 2, characterized in that: The first contact head and the second contact head are both formed by bending thin steel plates.

7. The curved carbon fiber composite mooring cable mechanical property testing device according to claim 2, characterized in that: Flexible rubber material is adhered to the contact surfaces of the first contact head and the second contact head with the cable body of the carbon fiber composite mooring cable.

8. A method for testing the mechanical properties of a curved carbon fiber composite mooring cable based on any one of claims 1 to 7, characterized in that: S1. Control the through-type jack to perform tension test on the carbon fiber composite mooring cable according to a certain loading system, and measure the tension of the carbon fiber composite mooring cable by using a cable force meter; At the same time, when the carbon fiber composite mooring cable is tensioned, the anchor slip of the anchor causes the carbon fiber composite rod to slide, which in turn drives the deformation of the flexible sheet material. The deformation of the flexible sheet material detected by the optical fiber sensor is then converted into the anchor slip amount; S2. If the shape of the carbon fiber composite mooring cable needs to be readjusted, the shape of the carbon fiber composite mooring cable is adjusted by loosening the limit assembly. After the adjustment is completed, the carbon fiber composite mooring cable is tensioned and tested in the same manner as in step S1.

9. A method for testing the mechanical properties of a curved carbon fiber composite mooring cable according to claim 8, characterized in that: The carbon fiber composite mooring cable performance test device is placed as a whole in the test pool, so that the carbon fiber composite mooring cable body and the anchors at both ends are completely immersed in water. The performance test of the mooring cable is carried out underwater according to a certain loading system to simulate the actual working conditions of the carbon fiber composite mooring cable in the marine environment.

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