A complex environment simulation test device for a deep-sea mining umbilical cable and a test method thereof

Abstract

The application discloses a kind of umbilical cable complex environment simulation test devices for deep-sea mining, the device includes test box, ocean current simulation mechanism, vibration mechanism, guide mechanism, test piece installation mechanism, wind load simulation mechanism, monitoring component and temperature control mechanism.Test box inner cavity fills sea water solution to simulate seawater environment;Ocean current simulation mechanism is communicated with test box inner cavity, for driving sea water solution to produce controlled circulation flow to simulate deep-sea ocean current load;Vibration mechanism is set at the top of test box, for producing multi-degree-of-freedom vibration to simulate ship body movement load;Guide mechanism is arranged on the bearing surface of vibration mechanism, and the direction of test piece is guided by rolling element;Test piece installation mechanism is used to lock the two ends of test piece and apply controllable tension;Wind load simulation mechanism is towards test piece to simulate wind load;Monitoring component real-time acquisition environmental parameter and test piece state parameter;Temperature control mechanism is immersed in sea water solution to adjust temperature to simulate deep-sea temperature environment.

Description

Technical Field

[0001] This invention relates to the field of marine engineering testing equipment, specifically to a complex environment simulation testing device and testing method for umbilical cables used in deep-sea mining. Background Technology

[0002] With the rapid development of deep-sea mining technology, umbilical cables, as the key link connecting surface platforms and deep-sea mining equipment, directly affect the safe operation of the entire deep-sea mining system. During actual service, umbilical cables must withstand complex marine environmental loads, including dynamic tension caused by surface hull movement, lateral loads from deep-sea currents, wind loads, and the combined effects of low temperature and high pressure in the deep sea. Therefore, establishing a testing device capable of realistically simulating these complex working conditions is of great significance for verifying the comprehensive performance of umbilical cables.

[0003] However, existing technologies have the following shortcomings: First, existing testing devices mainly simulate single environmental factors, such as ocean current loads or only ship motion, lacking the comprehensive simulation capability for the coupled effects of multiple environmental loads; second, existing devices are relatively simple in their load application methods, unable to precisely control and adjust the amplitude, frequency, and phase relationships of different loads, making it difficult to reproduce the complex combinations of various loads in the real marine environment; third, existing testing systems lack precise control over the guide angle of the test piece, unable to simulate the spatial arrangement of the umbilical cable under different working conditions; finally, the environmental parameter monitoring and data acquisition functions of existing devices are not perfect, failing to provide sufficient data support for the accurate evaluation of test results. These technical deficiencies prevent existing testing methods from comprehensively and realistically reflecting the actual working state and performance of the umbilical cable in complex marine environments. Summary of the Invention

[0004] To address the technical problem that existing technologies for umbilical cable performance verification rely on testing a single environmental factor and cannot reproduce complex scenarios of multiple factors coupled under real working conditions, this invention provides a comprehensive and high-fidelity simulation testing device for complex environments of umbilical cables used in deep-sea mining, enabling a comprehensive and high-fidelity reproduction of the mechanical vibration, fluid impact, environmental temperature changes, and corrosive media encountered by umbilical cables during service.

[0005] The technical solution adopted by this invention to solve its technical problem is: to provide a complex environment simulation test device for umbilical cables used in deep-sea mining, comprising: The test chamber is filled with seawater solution to simulate a seawater environment. The ocean current simulation mechanism is connected to the inner cavity of the test chamber and is used to drive the seawater solution to generate controlled circulating flow in order to simulate deep ocean current loads. The vibration mechanism, located at the top of the test chamber, is used to generate multi-degree-of-freedom vibrations to simulate the motion load of the ship hull under random waves and wind loads, and to transmit it to the test piece. A guiding mechanism is located on the bearing surface of the vibration mechanism; it is equipped with rotatable rolling elements for guiding the placement direction of the test specimen. The test piece mounting mechanism is used to lock both ends of the test piece and apply a controllable tension load to the test piece; one end is rotatably mounted on the test chamber, and the other end extends into the seawater solution inside the test chamber cavity along with the test piece, bypassing the rolling element. The wind load simulation mechanism has its outlet facing the test piece and is used to simulate wind loads of different levels. Monitoring components are used to collect environmental parameters and test piece status parameters in real time during the testing process; The temperature control mechanism is installed inside the test chamber and immersed in seawater solution to regulate the temperature of the seawater solution to simulate the temperature environment at different depths of the deep sea.

[0006] In some embodiments, the test piece mounting mechanism includes: The fixed end connector is installed on the top wall of the test chamber; The fixed end connecting shaft is rotatably connected to the fixed end connecting seat via a pin to accommodate the angle compensation of the test piece as it moves with the vibration mechanism; The first rope clamp has one end connected to the fixed end connecting shaft via a load detection component, and the other end used to lock the first end of the test component; The second rope clamp has one end for locking the second end of the test piece, and the other end is detachably connected to a counterweight. The counterweight provides a load to the test piece through gravity and cooperates with the first rope clamp to form a tension force. The load detection component is a tension sensor, which is connected to the host computer to monitor and provide feedback on the changes in tension force on the test piece in real time.

[0007] In some embodiments, the guiding mechanism includes: The vertical support component is connected at its bottom to the top wall of the vibration mechanism; A horizontal support member is rotatably connected to the top of a vertical support member; a rolling member is mounted on the horizontal support member and is rotatably connected to it. An angle adjustment mechanism is connected between the vertical support and the horizontal support. It is used to drive the horizontal support to rotate around the connection point with the vertical support, thereby adjusting the guide angle of the rolling element.

[0008] In some embodiments, the vertical support includes two spaced and symmetrically arranged support columns, and the horizontal support includes two spaced and symmetrically arranged support cantilever arms. The top of each support column is hinged to a support cantilever arm via a pin, forming a symmetrical rotational support structure. The rolling element is located between the two cantilever brackets and is rotatably connected to the two cantilever brackets via a pin. The angle adjustment mechanism includes two synchronously moving electric push rods. Each electric push rod is hinged at both ends to the corresponding support column and support cantilever, respectively. The electric push rod is connected to the host computer signal to receive control signals and drive the support cantilever to rotate. The rolling element is a pulley, and the outer circumferential surface of the pulley is provided with an annular guide groove that is adapted to the test piece.

[0009] In some embodiments, multiple ocean current simulation mechanisms are provided, which are distributed along the height and width directions of the test chamber, respectively; multiple first openings and multiple second openings are respectively provided on the left and right side walls of the test chamber. Each ocean current simulation device includes a connecting pipe and a pumping mechanism installed on the connecting pipe. The pumping mechanism is used to drive the seawater solution in the test tank to flow along the circulation channel. Each first opening and its corresponding second opening are connected by a connecting pipe to form a circulation flow. The pumping mechanism is a plunger pump, which is connected to the host computer. The flow rate and pressure of the seawater solution in the circulation channel are controlled by adjusting the displacement and operating frequency of the plunger pump to simulate ocean current loads of different sea state levels.

[0010] In some embodiments, the vibration mechanism is a six-degree-of-freedom motion platform, which includes a base plate, a top plate, and six inclined electric cylinders; The base plate is connected to the top wall of the test chamber, and the top plate is used to install the guide mechanism; each electric cylinder is hinged to the base plate and the top plate at both ends by ball joints respectively. Six electric cylinders are connected to the host computer and work together to drive the guide mechanism and test piece to achieve multi-degree-of-freedom dynamic motion, so as to simulate the real dynamic response of the ship hull under random waves and wind loads.

[0011] In some embodiments, the wind load simulation mechanism is installed on the top of the test chamber, with its air outlet facing the portion of the test specimen above the sea surface. The wind load simulation mechanism is connected to the host computer via signal, and the wind speed is adjusted by adjusting the fan power to simulate the effects of different levels of wind load. The wind load simulation mechanism is a wind turbine.

[0012] In some embodiments, the monitoring component includes: A high-definition camera is mounted on the outside of the test chamber via an adjustable bracket. A transparent observation window is provided on the side wall of the test chamber corresponding to the position of the high-definition camera. The camera end of the high-definition camera faces the observation window and is used to visually capture and record the internal environment of the test chamber and the changes in the shape of the test piece, vibration displacement, and vortex-induced vibration phenomena throughout the process. Multiple flow meters are telescopically mounted on the bottom wall of the test chamber. Each flow meter is equipped with a telescopic rod that can be extended and retracted along the height of the test chamber. The telescopic rod is equipped with a scale for marking the extension and retraction amount. The flow meter is connected to the host computer for real-time monitoring of seawater flow velocity at different heights. The multi-parameter sensor is installed inside the test chamber and immersed in seawater solution. The multi-parameter sensor integrates a temperature detection module and a pH detection module to monitor and record the temperature and pH values ​​of the seawater solution in real time, and feeds the monitoring data back to the host computer to achieve closed-loop control.

[0013] In some embodiments, the temperature control mechanism includes a heater, a condenser, and a temperature controller, wherein the heater and the condenser are both electrically connected to the temperature controller; The temperature controller is connected to the host computer and is used to selectively control the operation of the heater or condenser based on preset temperature parameters and feedback data from multi-parameter sensors, thereby achieving temperature regulation of the seawater solution.

[0014] In some embodiments, the complex environment simulation test device for deep-sea mining umbilical cables is linked with a host computer. The host computer is used to control the opening and closing of the vibration mechanism, ocean current simulation mechanism, load detection device, wind load simulation mechanism, monitoring components and temperature control mechanism, adjust the operating parameters, and receive, store and analyze the transmission parameter signals of each component.

[0015] This application also provides a testing method for a complex environment simulation testing device for umbilical cables used in deep-sea mining, the testing method comprising the following steps: Step S1. Environmental media preparation: Prepare a seawater solution with specific salinity and pH according to the test requirements, and inject the seawater solution into the test chamber to the preset liquid level; Step S2. Test piece installation: Lock the first end of the test piece to the first rope clamp of the test piece installation mechanism, lock the second end to the second rope clamp, and assemble a preset weight counterweight according to the test requirements; align the test piece around the guide mechanism's rolling element, immersing the main body of the test piece and the counterweight in the seawater solution inside the test chamber to simulate the actual working condition of deep-sea mining equipment suspended in seawater by an umbilical cable connection; initialize the load detection piece through the host computer and set the tension monitoring threshold. Step S3. Dynamic load simulation start-up: Start the vibration mechanism through the host computer, set the vibration parameters to simulate the heave, roll and pitch loads of the ship, and drive the test piece to move synchronously to simulate the vibration load applied to the umbilical cable by the heave of the ship; start the wind load simulation mechanism, set the power of the wind load simulation mechanism to simulate the target level wind load, so that the airflow continuously acts on the part of the test piece above the sea surface to simulate the wind load environment borne by the umbilical cable at and above the sea surface; Step S4. Start the ocean current simulation mechanism: Select one or more ocean current simulation mechanisms to start according to the test requirements via the host computer, set the pumping mechanism displacement and operating frequency, so that the seawater solution in the test tank forms a preset flow velocity and pressure circulation flow to simulate ocean current loads under different sea conditions in the deep sea; by adjusting the operating parameters of the ocean current simulation mechanism in different height and width directions, complex ocean current environments can be simulated; the seawater solution flows back into the inner cavity of the test tank from the first opening, the connecting pipe, and the second opening in sequence to simulate ocean current loads in the deep sea environment in the test tank. It generates controlled directional water flow, which acts on the underwater part of the umbilical cable to simulate the hydrodynamics that the umbilical cable bears in the real ocean; The number of ocean current simulation devices activated is positively correlated with the degree of flow of the seawater solution inside the test tank; Step S5. Temperature Environment Simulation Start-up: Set the target temperature parameters through the host computer. The temperature control mechanism starts the heater or condenser in real time according to the set parameters and feedback from multiple parameter sensors to adjust the temperature of the seawater solution to the target value and keep it stable. This is used to simulate the temperature conditions of the deep sea environment in the test chamber. Step S6. Full-parameter monitoring startup: Start the monitoring components, including the high-definition camera, current meter, and multi-parameter sensor, via the host computer; adjust the height of the current meter's telescopic rod to position the current detection end at the target monitoring location; the high-definition camera visually records the changes in the test specimen's shape and vibration displacement throughout the entire process; the current meter collects seawater velocity data at different locations in real time; the multi-parameter sensor collects seawater temperature and pH data in real time; all monitoring data are transmitted to the host computer for storage in real time. Step S7. Tension monitoring and data recording: The load testing component monitors the changes in tension force on the test piece in real time and transmits the monitoring data to the host computer. The host computer performs synchronous correlation analysis on the tension force data, environmental parameter data, and test piece status data to generate a test report. If the tension force exceeds the set threshold during the test, the host computer issues an early warning signal and can selectively control each simulation mechanism to stop operating. Step S8. Test End: Sequentially shut down each simulation mechanism and monitoring component, remove the test piece, and organize and analyze the test data and visual records.

[0016] The beneficial effects of this invention lie in overcoming the shortcomings of existing testing devices, such as limited functionality, crude control, and inability to simulate complex real-world coupling conditions. It achieves comprehensive and high-fidelity simulation of the umbilical cable's service environment. By integrating a test chamber, ocean current simulation mechanism, six-degree-of-freedom vibration mechanism, wind load simulation mechanism, temperature control mechanism, and a controllable tension test specimen mounting mechanism, it for the first time synchronously and accurately reproduces the complex coupling effects of various loads, including deep-sea temperature, three-dimensional ocean currents, multi-degree-of-freedom ship motion, sea surface wind load, and operational tension, on a single platform. This overcomes the limitations of existing technologies that can only perform single or sequential simulations, significantly improving test realism. Furthermore, each module of the device can be independently programmed and collaboratively controlled by a host computer, enabling fine adjustment of load amplitude, frequency, and spatial distribution. An angle-adjustable guide mechanism can flexibly simulate different spatial deployment states of the umbilical cable. In addition, the integrated multi-dimensional monitoring components can simultaneously collect environmental and test specimen response data, which are then fused and analyzed by a host computer, providing a solid and reliable data foundation for comprehensively and accurately evaluating the performance and lifespan of the umbilical cable under extreme coupling conditions. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0018] Figure 1 A schematic diagram of the complex environment simulation test device for deep-sea mining umbilical cables provided in this application from a first angle; Figure 2 for Figure 1 Cross-sectional view at point AA; Figure 3 A schematic diagram of the complex environment simulation test device for deep-sea mining umbilical cables provided in this application from a second angle; Figure 4 This is a schematic diagram of the structure of the ocean current simulation mechanism provided in the embodiments of this application; Figure 5 A schematic diagram showing the connection between the test piece mounting mechanism, vibration mechanism, and guide mechanism provided in the embodiments of this application; Figure 6 A schematic diagram of the flow meter provided in an embodiment of this application.

[0019] The attached figures are labeled as follows: 1. Test chamber; 11. First opening; 12. Second opening; 13. Transparent observation window; 2. Ocean current simulation mechanism; 21. Pumping mechanism; 22. Connecting pipes; 3. Vibration mechanism; 31. Base plate; 32. Top plate; 33. Electric cylinder; 4. Guiding mechanism; 41. Rolling element; 42. Support column; 43. Support cantilever; 44. Electric push rod; 5. Test piece mounting mechanism; 51. Fixed end connector; 52. Fixed end connecting shaft; 53. First rope clamp; 54. Load detection piece; 55. Second rope clamp; 56. Counterweight; 6. Wind load simulation mechanism; 7. Monitoring components; 71. High-definition camera; 72. Flow meter; 73. Multi-parameter sensor; 8. Temperature control mechanism; 81. Heater; 82. Condenser; 100. Test piece; a. Telescopic pole. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

[0022] In the description of this invention, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this invention. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the scope of protection of this invention.

[0023] Please see Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a first-angle structural schematic diagram of the complex environment simulation test device for deep-sea mining umbilical cables provided in this application. Figure 2 for Figure 1 Cross-sectional view at point AA. Figure 3This is a second-angle structural schematic diagram of the complex environment simulation testing device for deep-sea mining umbilical cables provided in this application. The testing device includes: a test chamber 1, an ocean current simulation mechanism 2, a vibration mechanism 3, a guiding mechanism 4, a test piece mounting mechanism 5, a wind load simulation mechanism 6, a monitoring component 7, and a temperature control mechanism 8. The testing device is linked to a host computer, which controls the opening, closing, and operation of the ocean current simulation mechanism 2, the vibration mechanism 3, the test piece mounting mechanism 5, the wind load simulation mechanism 6, the monitoring component 7, and the temperature control mechanism 8, and is used to transmit parameter signals.

[0024] The test chamber 1 is filled with seawater solution to simulate a real seawater environment, providing a near-deep-sea medium environment for umbilical cable performance testing. Test chamber 1 has sufficient strength to withstand the pressure of the internal fluid and external loads.

[0025] Please see Figure 4 Combined Figures 1 to 3 , Figure 4 The diagram below shows the structure of the ocean current simulation mechanism 2 provided in the embodiments of this application. In some embodiments, the ocean current simulation mechanism 2 is connected to the inner cavity of the test chamber 1 and is used to drive the seawater solution to generate controlled circulating flow in order to simulate deep ocean current load.

[0026] Specifically, multiple ocean current simulation mechanisms 2 can be configured and distributed along the height and width directions of the test chamber 1, respectively. Multiple first openings 11 and multiple second openings 12 are respectively provided on the left and right walls of the test chamber 1.

[0027] Each ocean current simulation device 2 includes a connecting pipe 22 and a pumping mechanism 21 installed on the connecting pipe 22. The pumping mechanism 21 is used to drive the seawater solution in the test chamber 1 to flow along the circulation channel. Each first opening 11 and the corresponding second opening 12 are connected through a connecting pipe 22 to form a circulation flow.

[0028] In some examples, the pumping mechanism 21 can be a plunger pump, which is connected to the host computer. By adjusting the displacement and operating frequency of the plunger pump, the flow rate and pressure of the seawater solution in the circulation channel are controlled, thereby realizing the quantitative simulation of ocean current load. This avoids the distortion of ocean current environment simulation caused by the low adjustment accuracy of traditional pumps and improves the accuracy of test data.

[0029] In this way, by distributing multiple ocean current simulation mechanisms 2 along the height and width of the test chamber 1, and opening corresponding first openings 11 and second openings 12 on the side wall of the test chamber 1, multiple independent closed circulation channels are constructed using connecting pipes 22 and pumping mechanisms 21, ensuring stable liquid flow direction. This allows for the simulation of ocean current environments at different heights, horizontal positions, flow velocities, and even complex flow directions within the test chamber 1, thus more realistically reproducing the three-dimensional non-uniform flow field of the deep sea. By precisely controlling the displacement and frequency of the plunger pump through a host computer, high-precision, programmable control of ocean current velocity and pressure can be achieved to meet the simulation requirements of different sea state levels.

[0030] Please see Figure 5 Combined Figures 1 to 3 , Figure 5 This is a schematic diagram of the connection between the test piece mounting mechanism 2, the vibration mechanism 3, and the guide mechanism 4 provided in the embodiments of this application. In some embodiments, the vibration mechanism 3 is set on the test box 1, at the top of the test box 1, to generate multi-degree-of-freedom vibration to simulate the motion load of the ship hull under random waves and wind loads, and to transmit it to the test piece 100.

[0031] Specifically, the vibration mechanism 3 can be a six-degree-of-freedom motion platform, which includes a base plate 31, a top plate 32, and six inclined electric cylinders 33.

[0032] The base plate 31 is connected to the top wall of the test chamber 1, and the top plate 32 is connected to the bottom of the guide mechanism 4. The fixed end of each electric cylinder 33 is connected to the base plate 31 by a ball joint, and the telescopic end of each electric cylinder 33 is connected to the top plate 32 by a ball joint. The coordinated action of the six electric cylinders 33 drives the guide mechanism 4 and the test piece 100 to simulate the dynamic response of the ship hull under random waves and wind loads.

[0033] In this way, the six-degree-of-freedom motion platform, through the coordinated action of six tilted electric cylinders 33, can achieve translational motion along the X, Y, and Z axes and rotational motion around these three axes. This allows it to reproduce the complex dynamic response of the hull under random waves and wind loads, making the vibration load on the test piece 100 closer to the real state. Furthermore, the base plate 31 is securely connected to the top wall of the test chamber 1, and the top plate 32 is connected to the bottom of the guide mechanism 4. The two ends of the electric cylinders 33 are respectively connected to the base plate 31 and the top plate 32 via ball joints. This ball joint connection ensures that the electric cylinders 33 can flexibly adapt to angle changes during extension and retraction, preventing the six-degree-of-freedom motion platform from jamming and ensuring efficient transmission of vibration loads. By adjusting the extension and retraction and motion frequency of the six electric cylinders 33, the motion trajectory, amplitude, and frequency of the vibration mechanism 3 can be precisely controlled, achieving quantitative simulation of hull motion under different wave and wind load levels, thus improving the relevance and diversity of the test scenarios.

[0034] Please continue reading. Figure 5 In some embodiments, the guide mechanism 4 is disposed on the bearing surface of the vibration mechanism 3 and is used to guide the placement direction of the test piece 100.

[0035] Specifically, the guiding mechanism 4 includes: a rolling element 41, a vertical support element, a horizontal support element, and an angle adjustment mechanism. The bottom of the vertical support element is connected to the top wall of the vibration mechanism 3. The horizontal support element is rotatably connected to the top of the vertical support element; the rolling element 41 is mounted on the horizontal support element and rotatably connected to it. The angle adjustment mechanism is connected between the vertical support element and the horizontal support element, and is used to drive the horizontal support element to rotate around its connection point with the vertical support element, thereby adjusting the guiding angle of the rolling element 41.

[0036] In this way, the angle adjustment mechanism drives the horizontal support to rotate around the connection point of the vertical support, which can flexibly adjust the guide angle of the rolling element 41, thereby adapting to the guide requirements of the test piece 100 under different deployment angles. It can simulate the stress of the umbilical cable under different suspension postures in the deep sea, and improve the richness of the test scenario.

[0037] The vertical support is firmly connected to the vibration mechanism 3, and the horizontal support enables the precise installation and positioning of the rolling element 41, forming a stable structure of vertical support and horizontal load-bearing, ensuring that the rolling element 41 will not shift or shake during the test, thus guaranteeing the reliability of the guiding function.

[0038] The angle adjustment mechanism makes the adjustment of the guide angle quantifiable and repeatable, avoiding the errors of manual adjustment, ensuring the consistency of the guide angle in different test batches or different test scenarios, and improving the comparability of test data.

[0039] In some examples, the vertical support includes two spaced and symmetrically arranged support columns 42, and the horizontal support includes two spaced and symmetrically arranged support cantilever arms 43. The top of each support column 42 is hinged to a support cantilever arm 43 via a pin, forming a symmetrical rotational support structure.

[0040] The rolling element 41 is located between the two support cantilever arms 43 and is rotatably connected to the two support cantilever arms 43 via a pin.

[0041] The angle adjustment mechanism includes two synchronously moving electric push rods 44. The two ends of each electric push rod 44 are respectively hinged to the corresponding support column 42 and support cantilever 43. The electric push rod 44 is connected to the host computer signal to receive control signals and drive the support cantilever 43 to rotate.

[0042] In this way, the symmetrically arranged support columns 42 and support cantilever 43 form a stable support frame, ensuring the structural stability of the guide mechanism 4 under vibration loads. The rolling element 41 uses a pulley with an annular guide groove, which can better constrain the test piece 100 and prevent it from slipping out of the groove or swaying. By synchronously driving the support cantilever 43 to rotate through two electric push rods 44, the guide angle of the rolling element 41 can be precisely, smoothly, and automatically adjusted, improving the efficiency and repeatability of the test.

[0043] In some embodiments, one end of the test piece mounting mechanism 5 is rotatably mounted on the test chamber 1, and the other end extends around the rolling element 41 into the seawater solution inside the test chamber 1 to lock the two ends of the test piece 100 and to apply a tension load to the test piece 100.

[0044] Specifically, the test piece mounting mechanism 5 may include: a fixed end connector 51, a fixed end connector 52, a first rope clamp 53, and a second rope clamp 55.

[0045] The fixed-end connecting seat 51 is mounted on the top wall of the test chamber 1. The fixed-end connecting shaft 52 is rotatably connected to the fixed-end connecting seat 51 via a pin to accommodate angle compensation when the test piece 100 moves with the vibration mechanism 3. One end of the first rope clamp 53 is connected to the fixed-end connecting shaft 52 via a load detection element 54, and the other end is used to lock the first end of the test piece 100. One end of the second rope clamp 55 is used to lock the second end of the test piece 100, and the other end is detachably connected to a counterweight 56. The counterweight 56 ​​provides a load to the test piece 100 through gravity and cooperates with the first rope clamp 53 to form tension.

[0046] In some examples, the load detection element 54 is a tension sensor, which is connected to the host computer signal to monitor and provide feedback on the change data of tension force borne by the test piece 100 in real time.

[0047] This design, where the pin-connected shaft 52 and the fixed-end connecting seat 51 are rotatably connected, allows for flexible adaptation to the angular displacement of the test piece 100 as it moves with the vibration mechanism 3. This enhances angular adaptive compensation, prevents additional stress concentration on the test piece 100 due to forced constraints, and ensures that the load on the test piece 100 is only a simulated environmental load, thus improving the realism of the test. The counterweight 56 ​​provides a quantifiable gravity load to the test piece 100. Combined with the locking action of the first rope clamp 53 and the second rope clamp 55, the tension of the test piece 100 can be precisely controlled. Simultaneously, the load detection component 54 can monitor changes in tension in real time, enabling dynamic tracking of the stress state of the test piece 100 and providing accurate load data support for subsequent performance evaluation. The modular assembly of each component forms the test piece mounting mechanism 5, making the assembly and disassembly process simple and efficient, facilitating rapid replacement and adjustment of the test piece 100, and improving testing efficiency.

[0048] Please return to the reference. Figures 1 to 3 In some embodiments, the wind load simulation mechanism 6 is mounted on the top of the test chamber 1, with its air outlet facing the portion of the test specimen 100 above the sea surface.

[0049] The wind load simulation mechanism 6 is connected to the host computer via signal. By adjusting the fan power, the wind speed can be adjusted to simulate different levels of wind load.

[0050] For example, wind load simulation mechanism 6 is a wind turbine.

[0051] In this way, the wind load simulation mechanism 6, with its outlet facing the test piece 100, can simulate the effect of wind load on the sea surface and the portion of the test piece 100 above the sea surface. Combined with the existing ocean current load and vibration load simulation functions, it achieves coupled simulation of multiple loads including wind, waves, and ocean currents, more comprehensively reproducing the real service environment of the umbilical cable. The wind load simulation mechanism 6 is mounted on the test housing 1, and the magnitude of the wind load can be precisely controlled by adjusting the power of the mechanism. It can simulate wind load environments at different wind speed levels, adapting to testing requirements under different sea conditions. The wind load simulation mechanism 6, as a new module, is directly integrated into the existing device without requiring significant modifications to the original device structure, simplifying the assembly process and improving the device's functional expandability.

[0052] Please see Figure 6 Combined Figures 1 to 3 , Figure 6 The schematic diagram of the flow meter 72 provided for the embodiments of this application shows that in some embodiments, the monitoring component 7 may include a high-definition camera 71, multiple flow meters 72 and a multi-parameter sensor 73.

[0053] The high-definition camera 71 is mounted on the outside of the test chamber 1 via an adjustable bracket. A transparent observation window 13 is provided on the side wall of the test chamber 1 corresponding to the position of the high-definition camera 71. The camera end of the high-definition camera 71 faces the observation window 13. The high-definition camera 71 is connected to the host computer for signal transmission and is used to perform full-process visual capture and recording of the environment inside the test chamber 1 and the shape changes, vibration displacement, and vortex-induced vibration phenomena of the test piece 100.

[0054] Multiple flow meters 72 are telescopically mounted on the bottom wall of the test chamber 1. Each flow meter 72 is equipped with a telescopic rod a, which can be telescopically adjusted along the height of the test chamber 1. The telescopic rod a is equipped with a scale for marking the amount of telescopic extension.

[0055] The flow meter 72 is connected to the host computer for real-time monitoring of seawater flow velocity at different heights.

[0056] The multi-parameter sensor 73 is installed in the inner cavity of the test chamber 1 and immersed in the seawater solution. The multi-parameter sensor 73 integrates a temperature detection module and a pH detection module to monitor and record the temperature and pH values ​​of the seawater solution in real time, and feeds the monitoring data back to the host computer to achieve closed-loop control.

[0057] In this way, monitoring component 7 integrates visual, fluid, and chemical multi-parameter monitoring capabilities. High-definition camera 71 provides non-destructive, full-process visual recording of the testing process through transparent observation window 13, capturing morphological changes, vibration displacements (e.g., transverse and combined vibrations), and vortex-induced vibration phenomena of the test piece 100. The extendable flowmeter 72 measures the seawater flow velocity at different depths within the test chamber 1, revealing details of the flow field distribution. Multi-parameter sensor 73, integrating temperature and pH detection modules, enables real-time monitoring of key parameters of the solution environment. All data is synchronized to the host computer, providing comprehensive and reliable data support for multi-dimensional data analysis and model verification.

[0058] In some embodiments, if the first opening 11 and the second opening 12 are respectively located on the left and right side walls of the test chamber 1, the seawater solution fluctuates along the length of the test chamber 1. To accurately measure the ocean current velocity, multiple current meters 72 are arranged along the width of the test chamber 1. In other embodiments, if the first opening 11 and the second opening 12 are respectively located on the front and rear side walls of the test chamber 1, the seawater solution fluctuates along the width of the test chamber 1. To accurately measure the ocean current velocity, multiple current meters 72 are arranged along the length of the test chamber 1.

[0059] Please continue reading. Figures 1 to 3 In some embodiments, the temperature control mechanism 8 is installed inside the test chamber 1 and immersed in the seawater solution to adjust the temperature of the seawater solution to simulate the temperature environment at different depths of the deep sea.

[0060] Specifically, the temperature control mechanism 8 includes a heater 81, a condenser 82, and a temperature controller, with both the heater 81 and the condenser 82 electrically connected to the temperature controller.

[0061] The temperature controller is connected to a host computer and is used to selectively control the operation of the heater 81 or the condenser 82 based on preset temperature parameters and feedback data from the multi-parameter sensor 73, thereby regulating the temperature of the seawater solution. Furthermore, the multi-parameter sensor 73 can detect the temperature of the seawater solution, and can shut off the heater 81 or the condenser 82 once the target temperature is reached.

[0062] For example, heater 81 can be a heating rod. Heater 81 and condenser 82 are well-established prior art and will not be described in detail here.

[0063] In this way, the temperature control mechanism 8, by integrating the heater 81, condenser 82, and temperature controller, and combining the real-time temperature feedback from the multi-parameter sensor 73 in the monitoring component 7, can quickly and accurately regulate and control the temperature of the seawater solution in the test chamber 1. This allows the device to simulate a wide temperature range from the warm water layer at the sea surface to the low temperature zone of the deep sea, and to study the effects of temperature changes on the material properties of the test piece 100, such as the elasticity and sealing of the polymer sheath, as well as the characteristics of the surrounding fluid, thus enhancing the realism of the environmental simulation.

[0064] In summary, the testing apparatus provided in this application, by integrating a test chamber 1, an ocean current simulation mechanism 2, a vibration mechanism 3, a guiding mechanism 4, a test piece mounting mechanism 5, a wind load simulation mechanism 6, a monitoring component 7, and a temperature control mechanism 8, constructs a highly integrated comprehensive simulation testing environment. It can simultaneously apply and control seawater environment, multi-directional ocean current loads, hull motion loads, controllable tension loads, wind loads, and deep-sea temperature loads on the test piece 100 on a single platform, thereby faithfully reproducing the complex and coupled real-world conditions faced by umbilical cables in deep-sea mining operations, greatly improving the comprehensiveness and accuracy of the test. For example, the test chamber 1 is filled with seawater solution to achieve basic simulation of the seawater environment. Combined with the controlled circulation flow of the ocean current simulation mechanism 2 and the multi-degree-of-freedom vibration of the vibration mechanism 3, the coupling effect of ocean current loads and hull motion loads in the deep-sea environment can be simultaneously reproduced, breaking through the limitations of single load simulation and more closely resembling the actual service conditions of umbilical cables. The guiding mechanism 4 precisely guides the placement direction of the test specimen 100 via the rolling element 41. Combined with the rotatable installation design and tension application function of the test specimen mounting mechanism 5, it ensures the placement stability of the test specimen 100 under complex loads and simulates the tension state of the umbilical cable during actual operation, avoiding distortion of test results due to placement deviations. The device is highly versatile, adaptable to deep-sea mining umbilical cable test specimens of different specifications without requiring significant modifications for specific test specimens, thus reducing testing costs and expanding the device's applicability.

[0065] Please combine Figures 1 to 6 The following is an example illustration of a testing method for a complex environment simulation testing device for umbilical cables used in deep-sea mining, provided by an embodiment of this application. The testing method includes the following steps: Step S1. Environmental media preparation: Prepare a seawater solution with specific salinity and pH according to the test requirements, and inject the seawater solution into the inner cavity of the test chamber 1 to the preset liquid level.

[0066] Step S2. Test piece installation: Lock the first end of the test piece 100 to the first rope clamp 53 of the test piece installation mechanism 5, and lock the second end to the second rope clamp 55. Assemble a counterweight 56 ​​of preset weight according to test requirements. Move the test piece 100 around the rolling element 41 of the guide mechanism 4, so that the main body of the test piece 100 and the counterweight 56 ​​are immersed in the seawater solution in the test chamber 1 to simulate the actual working condition of the umbilical cable connecting the deep-sea mining equipment suspended in the seawater. Initialize the load detection element 54 through the host computer and set the tension monitoring threshold.

[0067] Step S3. Dynamic load simulation start-up: Start the vibration mechanism 3 via the host computer, set the vibration parameters to simulate the heave, roll and pitch motion loads of the ship, drive the test piece 100 to move synchronously, and simulate the vibration load applied to the umbilical cable by the heave of the ship; start the wind load simulation mechanism 6, set the power of the wind load simulation mechanism 6 to simulate the wind load of the target level, so that the airflow continuously acts on the part of the test piece 100 above the sea surface, and simulate the wind load environment borne by the umbilical cable at and above the sea surface.

[0068] Step S4. Start the ocean current simulation mechanism 2: Select one or more ocean current simulation mechanisms 2 to start according to the test requirements via the host computer, set the discharge rate and operating frequency of the pumping mechanism 21, so that the seawater solution in the test chamber 1 forms a preset flow rate and pressure to simulate the ocean current load under different sea conditions in the deep sea; by adjusting the operating parameters of the ocean current simulation mechanism 2 in different height and width directions, the ocean current environment with complex flow direction can be simulated; the seawater solution flows back to the inner cavity of the test chamber 1 from the first opening 11, the connecting pipe 22, and the second opening 12 in sequence to simulate the ocean current load in the deep sea environment in the test chamber 1. It acts on the underwater part of the umbilical cable by generating a controlled directional water flow to simulate the hydrodynamics that the umbilical cable bears in the real ocean.

[0069] The number of ocean current simulation devices 2 activated is positively correlated with the degree of seawater flow in the test chamber 1.

[0070] Step S5. Temperature Environment Simulation Start-up: The target temperature parameters are set through the host computer. The temperature control mechanism 8 starts the heater 81 or condenser 82 according to the set parameters and the real-time feedback of the multi-parameter sensor 73, so as to adjust the temperature of the seawater solution to the target value and keep it stable, in order to simulate the temperature conditions of the deep sea environment in the test chamber 1.

[0071] Step S6. Full-parameter monitoring startup: Start the high-definition camera 71, flow meter 72 and multi-parameter sensor 73 of the monitoring component 7 via the host computer; adjust the height of the telescopic rod a of the flow meter 72 so that the flow velocity detection end is located at the target monitoring position; the high-definition camera 71 performs full visual recording of the shape changes and vibration displacement of the test piece 100; the flow meter 72 collects seawater flow velocity data at different locations in real time; the multi-parameter sensor 73 collects the temperature and pH data of the seawater solution in real time; all monitoring data are transmitted to the host computer for storage in real time.

[0072] Step S7. Tension monitoring and data recording: The load testing component 54 monitors the changes in tension force on the test piece 100 in real time and transmits the monitoring data to the host computer. The host computer performs synchronous correlation analysis on the tension force data, environmental parameter data, and test piece status data to generate a test report. If the tension force exceeds the set threshold during the test, the host computer issues an early warning signal and can selectively control each simulation mechanism to stop operating.

[0073] Step S8. Test End: Sequentially shut down each simulation mechanism and monitoring component, remove test piece 100, and organize and analyze the test data and visual records.

[0074] In this way, the testing method of this application embodiment unifies the opening, closing and operation of each component through the host computer 9, eliminating the need for manual operation of each mechanism, reducing human error and improving the stability and efficiency of the testing process; at the same time, the host computer 9 receives parameter signals transmitted by various sensors such as the multi-parameter sensor 73 and the tension sensor in real time, realizing the automatic acquisition and recording of test data. The test steps proceed in a logical sequence of scenario setup, load application, parameter adjustment, and monitoring and recording. The operational requirements for each step are clearly defined. Test scenarios under different sea conditions and temperature environments can be replicated by adjusting the number and displacement frequency of the pumping mechanism 21 and the motion parameters of the vibration mechanism 3, ensuring the consistency of test conditions for different test batches and improving the comparability of test data.

[0075] During the test, multiple monitoring components, including the flow meter 72, multi-parameter sensor 73, high-definition camera 71, and load detection component 54, are activated simultaneously to achieve full-process synchronous monitoring of environmental parameters such as flow rate, temperature, pH, stress and tension of test component 100, response morphology of test component 100, and vibration. This provides complete and comprehensive data support for evaluating the performance of test component 100 and avoids performance evaluation deviations caused by missing data.

[0076] This testing method is compatible with all functional modules of the aforementioned testing device. The parameter settings of each step can be flexibly adjusted according to different testing needs, making it suitable for testing deep-sea mining umbilical cables of different specifications and usage scenarios, thus improving the applicability of the testing method.

[0077] Therefore, this testing method centrally controls and integrates the vibration mechanism 3, ocean current simulation mechanism 2, load detection component 54, wind load simulation mechanism 6, monitoring component 7, and temperature control mechanism 8 via a host computer, achieving full automation and parameterization of the entire process from environmental preparation and load application to data acquisition. Each simulated load can be started step-by-step or synchronously according to a preset program, and can be dynamically adjusted or given a safety warning during the test based on real-time monitored tension and other data. This method is clear in its steps and highly operable, ensuring not only high efficiency and safety in the testing process but also the synchronization, correlation, and high value of the test data, providing a complete solution for in-depth analysis of the performance degradation mechanism of umbilical cables under complex coupling environments.

[0078] The above are merely preferred embodiments of the present invention and are 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 complex environment simulation testing device for umbilical cables used in deep-sea mining, characterized in that, include: The test chamber (1) is filled with seawater solution to simulate the seawater environment. The ocean current simulation mechanism (2) is connected to the inner cavity of the test chamber (1) and is used to drive the seawater solution to generate controlled circulating flow in order to simulate deep ocean current load; The vibration mechanism (3) is set on the top of the test box (1) to generate multi-degree-of-freedom vibration to simulate the motion load of the ship hull under random waves and wind loads, and transmit it to the test piece (100). A guiding mechanism (4) is provided on the bearing surface of the vibration mechanism (3); it is provided with a rotatable rolling element (41) for guiding the placement direction of the test piece (100); The test piece mounting mechanism (5) is used to lock the two ends of the test piece (100) and apply a controllable tension load to the test piece (100); one end of it is rotatably mounted on the test box (1), and the other end extends into the seawater solution inside the test box (1) along with the test piece (100) around the rolling element (41); The wind load simulation mechanism (6) has its air outlet facing the test piece (100) and is used to simulate wind loads of different levels. The monitoring component (7) is used to collect environmental parameters and status parameters of the test piece (100) in real time during the test process; The temperature control mechanism (8) is installed in the inner cavity of the test chamber (1) and immersed in the seawater solution to adjust the temperature of the seawater solution to simulate the temperature environment at different depths of the deep sea.

2. The complex environment simulation and testing device for deep-sea mining umbilical cables according to claim 1, characterized in that, The test piece mounting mechanism (5) includes: The fixed end connector (51) is installed on the top wall of the test chamber (1); The fixed end connecting shaft (52) is rotatably connected to the fixed end connecting seat (51) via a pin to accommodate the angle compensation of the test piece (100) as it moves with the vibration mechanism (3); The first rope clamp (53) has one end connected to the fixed end connecting shaft (52) via a load detection piece (54), and the other end is used to lock the first end of the test piece (100); The second rope clamp (55) has one end for locking the second end of the test piece (100), and the other end is detachably connected to a counterweight (56). The counterweight (56) provides a load to the test piece (100) through gravity and cooperates with the first rope clamp (53) to form a tension force. The load detection component (54) is a tension sensor. The tension sensor is connected to the host computer signal and is used to monitor and feedback the tension force change data borne by the test piece (100) in real time. The test piece (100) is an umbilical cable.

3. The complex environment simulation and testing device for deep-sea mining umbilical cables according to claim 2, characterized in that, The guiding mechanism (4) includes: A vertical support member, the bottom of which is connected to the top wall of the vibration mechanism (3); A horizontal support member is rotatably connected to the top end of the vertical support member; the rolling element (41) is mounted on the horizontal support member and is rotatably connected to the horizontal support member. An angle adjustment mechanism is connected between the vertical support and the horizontal support to drive the horizontal support to rotate around the connection point with the vertical support, thereby adjusting the guide angle of the rolling element (41).

4. The complex environment simulation and testing device for deep-sea mining umbilical cables according to claim 3, characterized in that, The vertical support includes two spaced and symmetrically arranged support columns (42), and the horizontal support includes two spaced and symmetrically arranged support cantilever arms (43). The top of each support column (42) is hinged to a support cantilever arm (43) via a pin, forming a symmetrical rotational support structure. The rolling element (41) is located between the two support cantilever arms (43) and is rotatably connected to the two support cantilever arms (43) by means of a pin. The angle adjustment mechanism includes two synchronously moving electric push rods (44). The two ends of each electric push rod (44) are respectively hinged to the corresponding support column (42) and support cantilever (43). The electric push rod (44) is connected to the host computer signal and is used to receive control signals and drive the support cantilever (43) to rotate. The rolling element (41) is a pulley, and the outer circumferential surface of the pulley is provided with an annular guide groove that is adapted to the test piece (100).

5. The complex environment simulation and testing device for deep-sea mining umbilical cables according to claim 1, characterized in that, The ocean current simulation mechanism (2) is configured in multiple ways, and is distributed along the height and width directions of the test box respectively; multiple first openings (11) and multiple second openings (12) are respectively opened on the left and right side walls of the test box (1). Each of the ocean current simulation mechanisms (2) includes a connecting pipe (22) and a pumping mechanism (21) installed on the connecting pipe (22). The pumping mechanism (21) is used to drive the seawater solution in the test chamber (1) to flow along the circulation channel. Each first opening (11) and the corresponding second opening (12) are connected through one of the connecting pipes (22) to form a circulation flow. The pumping mechanism (21) is a plunger pump, which is connected to the host computer. The flow rate and pressure of the seawater solution in the circulation channel are controlled by adjusting the displacement and operating frequency of the plunger pump to simulate ocean current loads of different sea state levels.

6. The complex environment simulation and testing device for deep-sea mining umbilical cables according to claim 1, characterized in that, The vibration mechanism (3) is a six-degree-of-freedom motion platform, which includes a base plate (31), a top plate (32) and six inclined electric cylinders (33). The base plate (31) is connected to the top wall of the test chamber (1), and the top plate (32) is used to install the guide mechanism (4); the two ends of each electric cylinder (33) are respectively hinged to the base plate (31) and the top plate (32) through ball joints; The six electric cylinders (33) are connected to the host computer and work together to drive the guide mechanism (4) and the test piece (100) to achieve multi-degree-of-freedom dynamic motion, so as to simulate the real dynamic response of the ship under random waves and wind loads.

7. The complex environment simulation and testing device for deep-sea mining umbilical cables according to claim 2, characterized in that, The wind load simulation mechanism (6) is installed on the top of the test box (1), with its air outlet facing the part of the test piece (100) above the sea surface; The wind load simulation mechanism (6) is connected to the host computer signal and adjusts the wind speed by adjusting the fan power to simulate different levels of wind load. The wind load simulation mechanism (6) is a wind turbine.

8. The complex environment simulation test device for deep-sea mining umbilical cables according to claim 7, characterized in that, The monitoring component (7) includes: A high-definition camera (71) is mounted on the outside of the test chamber (1) via an adjustable bracket. A transparent observation window (13) is provided on the side wall of the test chamber (1) corresponding to the position of the high-definition camera (71). The camera end of the high-definition camera (71) faces the observation window (13). The high-definition camera (71) is connected to the host computer for signal transmission and is used to perform full-process visual capture and recording of the environment inside the test chamber (1) and the shape changes, vibration displacement, and vortex-induced vibration phenomena of the test piece (100). Multiple flow meters (72) are telescopically mounted on the bottom wall of the test chamber (1). Each flow meter (72) is provided with a telescopic rod (a). The telescopic rod (a) can be telescopically adjusted along the height direction of the test chamber (1). The telescopic rod (a) is provided with a scale for marking the amount of telescopic movement. The flow meter (72) is connected to the host computer signal and is used to monitor the flow rate of seawater at different heights in real time; A multi-parameter sensor (73) is installed in the inner cavity of the test chamber (1) and immersed in the seawater solution. The multi-parameter sensor (73) integrates a temperature detection module and a pH detection module, which are used to monitor and record the temperature and pH values ​​of the seawater solution in real time, and feed the monitoring data back to the host computer to realize closed-loop control.

9. The complex environment simulation and testing device for deep-sea mining umbilical cables according to claim 1, characterized in that, The temperature control mechanism (8) includes a heater (81), a condenser (82), and a temperature controller. The heater (81) and the condenser (82) are both electrically connected to the temperature controller. The temperature controller is connected to the host computer and is used to selectively control the heater (81) or condenser (82) to work based on preset temperature parameters and feedback data from multi-parameter sensors (73), thereby regulating the temperature of the seawater solution.

10. A test method for a complex environment simulation test device for umbilical cables used in deep-sea mining, applied to the test device described in claims 1-9, characterized in that, The testing device is linked with a host computer, which controls the opening and closing of the vibration mechanism (3), the ocean current simulation mechanism (2), the load detection component (54), the wind load simulation mechanism (6), the monitoring component (7), and the temperature control mechanism (8), as well as the adjustment of operating parameters, and receives, stores, and analyzes the parameter signals transmitted by each component; the testing method includes the following steps: Step S1. Environmental media preparation: Prepare a seawater solution with a certain salinity and pH according to the test requirements, and inject the seawater solution into the inner cavity of the test chamber (1) to the preset liquid level; Step S2. Test piece installation: Lock the first end of the test piece (100) to the first rope clamp (53) of the test piece installation mechanism (5), lock the second end to the second rope clamp (55), and assemble a counterweight (56) of preset weight according to the test requirements; let the test piece (100) pass around the rolling part (41) of the guide mechanism (4), so that the main body of the test piece (100) and the counterweight (56) are immersed in the seawater solution in the test box (1) to simulate the actual working condition of the umbilical cable connecting the deep-sea mining equipment suspended in the seawater; initialize the load detection piece (54) through the host computer and set the tension monitoring threshold; Step S3. Dynamic load simulation start: Start the vibration mechanism (3) through the host computer, set the vibration parameters to simulate the heave, roll and pitch motion loads of the ship, drive the test piece (100) to move synchronously, and simulate the vibration load applied to the umbilical cable by the heave of the ship; start the wind load simulation mechanism (6), set the power of the wind load simulation mechanism (6) to simulate the wind load of the target level, so that the airflow continuously acts on the part of the test piece (100) above the sea surface, and simulate the wind load environment borne by the umbilical cable at and above the sea surface; Step S4. Start the ocean current simulation mechanism (2): Select one or more ocean current simulation mechanisms (2) to start according to the test requirements through the host computer, set the discharge rate and operating frequency of the pumping mechanism (21) so that the seawater solution in the test box (1) forms a preset flow rate and pressure to simulate the ocean current load of different sea conditions in the deep sea; by adjusting the operating parameters of the ocean current simulation mechanism (2) in different height and width directions, the complex ocean current environment can be simulated; the seawater solution flows back to the inner cavity of the test box (1) from the first opening (11), the connecting pipe (22), and the second opening (12) in sequence to simulate the ocean current load in the deep sea environment in the test box (1). It generates controlled directional water flow and acts on the underwater part of the umbilical cable to simulate the hydrodynamic force borne by the umbilical cable in the real ocean. The number of ocean current simulation devices (2) activated is positively correlated with the degree of seawater flow in the test chamber (1); Step S5. Temperature environment simulation start-up: The target temperature parameters are set by the host computer. The temperature control mechanism (8) starts according to the set parameters and the real-time feedback of the multi-parameter sensor (73) to adjust the temperature of the seawater solution to the target value and keep it stable, so as to simulate the temperature conditions of the deep sea environment in the test chamber (1). Step S6. Full-parameter monitoring start-up: Start the high-definition camera (71), flow meter (72) and multi-parameter sensor (73) of the monitoring component (7) through the host computer; adjust the height of the telescopic rod (a) of the flow meter (72) so that the flow velocity detection end is located at the target monitoring position; the high-definition camera (71) performs full visual recording of the shape change and vibration displacement of the test piece (100); the flow meter (72) collects seawater flow velocity data at different locations in real time; the multi-parameter sensor (73) collects the temperature and pH data of the seawater solution in real time; all monitoring data are transmitted to the host computer for storage in real time. Step S7. Tension monitoring and data recording: The load testing component (54) monitors the change in tension force on the test piece (100) in real time and transmits the monitoring data to the host computer. The host computer performs synchronous correlation analysis on the tension force data, environmental parameter data and test piece status data to form a test report. If the tension force exceeds the set threshold during the test, the host computer issues an early warning signal and can selectively control each simulation mechanism to stop running. Step S8. Test End: Sequentially shut down each simulation mechanism and monitoring component, remove the test piece (100), and organize and analyze the test data and visual records.

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