Seabed data cabin stability experiment device and method under complex underwater power condition

Abstract

The invention discloses a seabed data cabin stability experiment device and method under a complex underwater power condition, and a power simulation system comprises a wave simulation device, an ocean current simulation device and an earthquake simulation device, and is used for simulating the coupling effect of various power loads in a real ocean environment; a seabed soil body is laid in the experimental water tank so as to simulate physical and mechanical characteristics of a seabed soil layer in a real marine environment; a sensor is arranged on the surface of the data cabin model, and the data cabin model is arranged in the experimental water tank and is used for monitoring stress and deformation conditions of the data cabin model under the action of dynamic load in real time through the sensor; the measurement and control system is used for synchronously collecting excitation characteristics of various dynamic loads and stress and deformation data of the data cabin model, and performing parameter adjustment and closed-loop control on the dynamic simulation system; the device is used for simulating the structural stability of the seabed data cabin under the action of complex dynamic loads such as waves, ocean currents and earthquakes, and scientific basis and technical support are provided for design, construction and protection of the seabed data cabin.

Description

Technical Field

[0001] This invention relates to the interdisciplinary field of marine engineering and geotechnical engineering, and more specifically to an experimental apparatus and method for the stability of a seabed data cabin under complex underwater dynamic conditions. Background Technology

[0002] With the advent of the big data era, subsea data capsules, as a new type of data storage facility, are gradually becoming an important choice for the construction of marine data centers due to their advantages such as utilizing the natural cooling effect of seawater and saving land space. Subsea data capsules are typically buried on the seabed and are subjected to complex underwater dynamic loads such as waves, ocean currents, and earthquakes over long periods. These dynamic loads can cause erosion of the seabed soil, leading to instability of the data capsule's foundation, which in turn affects the normal operation of the data capsule and may even result in serious consequences such as data loss. In some areas with strong ocean currents, the rapid erosion of the seabed soil around the data capsule can expose parts of the capsule structure, and even cause tilting and displacement, seriously threatening the safe operation of the data capsule and the reliability of data storage.

[0003] Currently, research on the in-situ stability and protection of subsea data modules mainly relies on numerical simulations and simple flume tests. While numerical simulations can simulate complex operating conditions, the results deviate significantly from reality due to uncertainties in model parameters and limitations in computational methods. Existing flume test setups often only simulate single dynamic loads, failing to consider the coupling effects of waves from different directions, ocean currents with varying velocities, and tides simultaneously. Furthermore, they struggle to realistically simulate the complex geological conditions and dynamic environment of the seabed, making it impossible to accurately assess the in-situ stability and protection effectiveness of subsea data modules during actual operation. Therefore, there is an urgent need for an experimental device and method capable of simulating complex underwater dynamic conditions to conduct in-depth research on the in-situ stability and protection technologies of subsea data modules. Summary of the Invention

[0004] The purpose of this invention is to provide an experimental device and method for simulating the structural stability of a subsea data cabin under complex underwater dynamic conditions. This device is used to simulate the structural stability of a subsea data cabin under complex dynamic loads such as waves, ocean currents, and earthquakes in a laboratory environment, providing scientific basis and technical support for the design, construction, and protection of subsea data cabins.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An experimental device for the stability of a seabed data cabin under complex underwater dynamic conditions includes: The dynamic simulation system, including wave simulation devices, ocean current simulation devices, and earthquake simulation devices, is used to simulate the coupling effects of multiple dynamic loads in a real marine environment. The experimental water tank is lined with seabed soil to simulate the physical and mechanical properties of seabed soil layers in a real marine environment. The data cabin model is equipped with sensors on its surface and is placed in an experimental water tank to monitor its stress and deformation under dynamic loads in real time. The measurement and control system is used to simultaneously acquire the excitation characteristics of various dynamic loads and the stress and deformation data of the data cabin model, and to perform parameter adjustment and closed-loop control of the dynamic simulation system.

[0006] Furthermore, the ocean current simulation device includes adjustable-speed axial flow pumps and a flow guiding system located at both ends of the experimental water tank, used to simulate ocean currents with different flow velocities and directions; The wave simulation device includes a pusher plate wave generator located at one end of the experimental water tank, and a wave-damping net located at the other end of the experimental water tank; the pusher plate wave generator performs horizontal reciprocating motion along the guide rail beam to generate regular and irregular waves with different wave heights, wave periods, and wave spectra. The earthquake simulation device includes a shaking table located at the bottom of an experimental water tank, used to simulate seismic waves of different frequencies, amplitudes, and durations.

[0007] Furthermore, the flow guiding system includes a flow guide plate and a flow stabilizing grid; The guide plate and flow stabilizer are located between the adjustable-speed axial flow pump and the experimental water tank to reduce water flow turbulence and vortices.

[0008] Furthermore, the data cabin model is fixed in the experimental water tank by a bracket, and the burial depth and tilt angle of the data cabin model can be adjusted.

[0009] Furthermore, the measurement and control system includes: Sensors are used to monitor the motion state of the shaking table, the stress and deformation of the data cabin model under dynamic loads, the pore water pressure and soil pressure in the seabed soil, the water flow velocity and wave height in real time. A data acquisition instrument is used to collect real-time monitoring data from sensors. The computer control system is used to process and analyze real-time monitoring data from sensors, and to control the power simulation system in real time based on the analysis results. The human-computer interface is used to display wave, ocean current, and seismic parameters and images of the dynamic simulation system during the experiment.

[0010] Furthermore, the sensors include: a pressure sensor, a displacement sensor, an acceleration sensor, a pore water pressure sensor, and a pressure sensor.

[0011] The present invention also provides a method for applying a stability test device for a seabed data capsule under complex underwater dynamic conditions, the method comprising the following steps: S1. Prepare simulated seabed soil, lay it in the experimental water tank, install the data cabin model, and inject clean water into the experimental water tank; S2. Activate the wave simulation device, ocean current simulation device, and earthquake simulation device to simulate the generation and propagation characteristics of waves in a real marine environment; S3. Synchronously collect the wave propagation characteristics and the stress and deformation of the data cabin model, and adjust the parameters and perform closed-loop control of the dynamic simulation system. S4. Observe the instability process of the simulated seabed soil under dynamic load and record relevant data; analyze the collected data and evaluate the structural stability of the data cabin model.

[0012] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects: This invention integrates wave, ocean current, and earthquake simulation devices to realistically reproduce complex marine dynamic environments. Combined with an experimental water tank containing seabed soil, it accurately simulates the characteristics of real seabed land, providing full-scale environmental coupling for the data cabin model. By synchronously acquiring wave propagation characteristics and the stress and deformation data of the data cabin model under dynamic loads, real-time correlation analysis of environmental load and structural response is achieved. Combined with the parameter adjustment and closed-loop control functions of the measurement and control system, it can not only precisely adjust the simulation parameters to adapt to different marine conditions, but also improve the simulation accuracy through feedback optimization. Thus, it comprehensively and dynamically evaluates the mechanical performance and stability of the data cabin model in the real marine environment, providing high-fidelity experimental support for the safety design, reliability verification, and disaster response mechanism research of marine engineering structures. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0014] The following description, in conjunction with the accompanying drawings, further illustrates the experimental apparatus and method for the stability of a seabed data cabin under complex underwater dynamic conditions according to the present invention. Figure 1 This is a schematic diagram of the overall structure of the experimental apparatus in Embodiment 1 of the present invention.

[0015] Figure 2 This is a front view of the experimental apparatus in Embodiment 1 of the present invention; Figure 3 This is a top view of the experimental apparatus in Embodiment 1 of the present invention; Figure 4 This is a three-dimensional structural diagram of the data cabin model in Embodiment 1 of the present invention; Figure 5 This is the front view of the sensor in the data cabin model in Embodiment 1 of the present invention; Figure 6 This is a side view of the sensor in the data cabin model in Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the dynamic simulation system in Embodiment 2 of the present invention.

[0016] Figure descriptions: 1. Flow meter; 2. Wave height meter; 3. Pusher-type wave generator; 4. Adjustable speed axial flow pump; 5. Data cabin model; 6. Vibration table; 7. Wave damping net; 8. Flow stabilizing grid; 9. Guide rail beam; 10. Laser scanner; 11. Experimental water tank. Detailed Implementation

[0017] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0018] To better understand the purpose, structure, and function of this invention, the invention will be described in further detail below with reference to the accompanying drawings.

[0019] Example 1 This invention provides an experimental device for the stability of a seabed data capsule under complex underwater dynamic conditions, such as... Figure 1-3 As shown, it includes: The dynamic simulation system, including wave simulation devices, ocean current simulation devices, and earthquake simulation devices, is used to simulate the coupling effects of multiple dynamic loads in a real marine environment. The ocean current simulation device includes adjustable-speed axial flow pumps 4 and a flow guiding system located at both ends of the experimental tank 11. These systems simulate ocean currents with different flow velocities and directions. By adjusting the rotational speed and the number of pumps 4 activated, the speed and direction of the water flow are controlled, thus simulating ocean currents with varying velocities and directions. The flow guiding system includes guide plates and flow stabilizers 8, which enable more uniform and stable water flow, reduce turbulence and eddies, and ensure the accuracy of experimental data. The wave simulation device includes a pusher wave generator 3 located at one end of an experimental water tank 11, and a wave-damping net 7 located at the other end of the experimental water tank 11. The movement of the pusher wave generator 3 is controlled by a computer to generate regular and irregular waves with different wave heights, wave periods, and wave spectra, simulating the wave action in a real marine environment. The pusher wave generator 3 is equipped with high-precision displacement and force sensors to monitor the motion and force conditions of the pusher in real time, thereby achieving precise control of wave parameters. The earthquake simulation device includes a shaking table 6 located at the bottom of the experimental water tank 11, capable of horizontal (X, Y directions) and vertical (Z direction) vibrations. Driven by a servo motor, the shaking table 6 can generate seismic waves of different frequencies, amplitudes, and durations to simulate earthquake effects. The shaking table 6 is equipped with acceleration and displacement sensors to monitor its motion in real time, ensuring the accuracy of the earthquake simulation.

[0020] The experimental water tank is made of high-strength transparent plexiglass, facilitating observation of changes in the seabed data capsule model 5 and the soil during the experiment. The tank dimensions are designed according to experimental requirements, and the interior is lined with simulated seabed soil, which can be proportioned and layered according to actual engineering geological conditions. Wave-damping devices are installed at both ends of the experimental water tank, which can effectively absorb wave energy and reduce the impact of wave reflection on the experimental results.

[0021] Data Capsule Model 5 is a scaled-down model of the seabed data capsule, fabricated based on similarity theory. The mechanical properties of the model's materials are similar to those of the actual data capsule. Data Capsule Model 5 is fixed to the simulated seabed within the experimental tank using a support frame. The support frame allows adjustment of the data capsule model's burial depth and tilt angle to simulate different installation conditions. Pressure and displacement sensors are arranged on the surface of the data capsule model to monitor its stress and deformation under dynamic loads, such as... Figures 4-6 As shown.

[0022] The measurement and control system is used to simultaneously acquire the excitation characteristics of various dynamic loads and the force and deformation data of the data cabin model 5, and to perform parameter adjustment and closed-loop control of the dynamic simulation system.

[0023] The measurement and control system includes: Sensors are placed on the surface of the data cabin model, the shaking table, and the seabed soil to monitor the motion state of the shaking table, the stress and deformation of the data cabin model under dynamic load, and the pore water pressure and soil pressure in the seabed soil in real time. The data acquisition unit is used to collect real-time data from all sensors; the flow velocity 1 and wave height 2 are used to collect the flow velocity and wave height, respectively. The computer control system is used to process and analyze real-time data from sensors, and to control the parameters of waves, ocean currents and earthquakes in the dynamic simulation system based on the analysis results. The human-computer interaction interface is used to display the parameters and images of the experimental device during the experiment.

[0024] The sensors include: pressure sensors, displacement sensors, acceleration sensors, pore water pressure sensors, and pressure sensors, etc.

[0025] Example 2 This invention also provides a method for testing the stability of a seabed data capsule under complex underwater dynamic conditions, as applied in Example 1, such as... Figure 7 As shown, it includes the following steps: S1. Experimental Preparation Stage: Based on actual engineering geological conditions, simulated seabed soil is prepared and laid in layers within the experimental water tank 11, then compacted to ensure its physical and mechanical properties are similar to those of real seabed soil. The prepared scaled-down model of the seabed data cabin is installed on the simulated seabed using supports, and the burial depth and tilt angle of the data cabin model 5 are adjusted to the design values. Various sensors are arranged according to design requirements, including sensors on the surface of the data cabin model, sensors within the simulated seabed soil, and sensors on the dynamic simulation device, ensuring proper sensor connections. Clean water is injected into the experimental water tank to reach the design height; specifically: Based on a real-world subsea data module project, a scale of 1:30 was determined according to similarity theory. Simulated seabed soil was prepared using quartz sand with a particle size of 0.1-0.5 mm. By controlling the moisture content and compaction degree, the density was adjusted to 1.8 g / cm³, the internal friction angle to be 30°, and the cohesion to be 5 kPa, closely resembling the physical and mechanical properties of actual seabed soil. The simulated seabed soil was layered and laid in an experimental water tank measuring 8m × 3m × 2m, with each layer being 10 cm thick, and compacted using a tamping machine.

[0026] A scaled-down model of the seabed data capsule was constructed using aluminum alloy, with an elastic modulus of 70 GPa and a density of 2700 kg / m³, similar to the mechanical properties of the actual data capsule's steel. The data capsule model was mounted on the simulated seabed using adjustable supports, with the burial depth adjusted to 0.5 m (model dimensions) and the tilt angle to 0°. Ten pressure sensors and six displacement sensors were evenly distributed on the surface of the data capsule model. In the simulated seabed soil, pore water pressure sensors and soil pressure sensors were placed every 0.5 m along the data capsule's axis, for a total of eight pore water pressure sensors and eight soil pressure sensors. Two flow velocity sensors were placed 0.3 m away from the data capsule model. Simultaneously, displacement and force sensors were installed on the push plate of the wave simulation device, and acceleration and displacement sensors were installed on the vibration table. All sensors were connected to the data acquisition instrument and calibrated. Clean water was injected into the experimental tank to reach a water level of 1.5 m.

[0027] S2. Dynamic Load Simulation Process: First, the wave simulation device is activated, and wave parameters such as wave height, wave period, and wave spectrum are set through the computer control system to generate the required waves. Then, the ocean current simulation device is activated, and the speed and number of adjustable axial flow pumps 4 are adjusted to control the water flow velocity and direction, simulating the effect of ocean currents. After the waves and ocean currents have been running stably for a period of time, the earthquake simulation device is activated, and the frequency, amplitude, and duration of the seismic waves are set according to the experimental requirements to conduct an earthquake simulation. Throughout the experiment, the operating parameters of the dynamic simulation device are monitored and adjusted in real time through the computer control system to ensure that the coupling effect of multiple dynamic loads meets the experimental design requirements; specifically: The wave simulation device was activated, and wave parameters were set via the computer control system to generate a regular wave with a wave height of 0.2 m (model dimensions) and a wave period of 1.5 s. After the wave had stabilized for 5 minutes, the ocean current simulation device was activated, and the speed of the axial flow pump was adjusted to achieve a water flow velocity of 0.3 m / s (model dimensions), with the flow direction consistent with the wave propagation direction. After the combined action of the wave and ocean current for 10 minutes, the earthquake simulation device was activated, setting the earthquake wave to an El-Centro wave with a peak acceleration of 0.1 g (model dimensions) and a duration of 20 s for earthquake simulation. Throughout the experiment, the parameters of the wave, ocean current, and earthquake were monitored and adjusted in real time via the computer control system to ensure that the coupling effect of the dynamic load met the experimental design requirements.

[0028] S3. Data Acquisition and Monitoring Process: During the dynamic load simulation, the data acquisition instrument collects data from all sensors in real time at a set sampling frequency. This includes stress and deformation data of the data cabin model, changes in pore water pressure, soil pressure distribution, water flow velocity, and operating parameters of the dynamic simulation device. The computer control system processes and analyzes the collected data in real time, plotting curves of various data over time and displaying the data and images during the experiment in real time through an image display device, allowing researchers to observe and analyze experimental phenomena promptly. Specifically, the data acquisition instrument collects data from all sensors in real time at a sampling frequency of 500Hz. The computer control system processes and analyzes the collected data in real time, plotting pressure-time and displacement-time curves of the data cabin model, pore water pressure-time curves, soil pressure-time curves, and water flow velocity-time curves of the simulated seabed soil, and displaying these curves on a screen in real time. Researchers closely observe data changes and phenomena during the experiment, recording and analyzing any abnormal data or phenomena promptly.

[0029] S4. Observation and Analysis of the Instability Process: During the experiment, the instability process of the simulated seabed soil under dynamic loads was observed through the transparent sidewall of the experimental tank. Data such as start time, crater range, and crater depth were recorded. After the experiment, the collected data were analyzed in detail to study the changes in the soil surrounding the seabed data cabin model under the coupled effects of various dynamic loads such as waves, ocean currents, and earthquakes. The stress and deformation of the data cabin model were analyzed, and the structural stability of the data cabin model was evaluated. Simultaneously, the structural stability of the seabed data cabin under different protective measures (such as protective plates, rockfill protection, etc.) was compared to provide an optimization scheme for the protective design of the seabed data cabin; specifically: During the experiment, observations through the transparent sidewall of the experimental tank revealed soil changes at the front of the data capsule model under the influence of waves and ocean currents. The scour area gradually expanded over time. After the earthquake, the scour depth increased significantly. Detailed analysis of the collected data after the experiment showed that the maximum scour depth at the front of the data capsule model reached 0.15m (model dimensions), and the model experienced some horizontal displacement and tilting under dynamic loads. Comparison of experimental data under different protective measures (such as installing a 0.1m high and 0.2m wide scour shield at the front of the data capsule model) concluded that the scour shield effectively reduced the depth of the scour and improved the structural stability of the seabed data capsule.

[0030] In this embodiment, a coupled dynamics model is developed in the measurement and control system. This model specifically utilizes a multi-physics field cooperative control algorithm to calculate in real time the disturbance effects of seismic waves on wave parameters (wave height, period) and ocean current velocity. 1. Real-time data fusion framework: Acquire sensor data and environmental parameters, including wave height meter (waves), current meter (ocean currents), accelerometer (earthquakes), and earth pressure meter (seabed response).

[0031] Environmental parameters include: water level in the tank, water temperature (which affects density), and soil porosity; Kalman filtering (KF) is used to perform noise filtering and state estimation on multi-source sensor data, and the fused waveform is output. Flow rate , earthquake acceleration

[0032] The weights are dynamically adjusted based on the sensor confidence level (e.g., increasing the weight of the accelerometer during an earthquake). 2. Core control algorithm: Model Predictive Control (MPC) Predicting the system state within a future time period Tp based on coupling equations: x ( k+1 ) =f (x ( k ) ,u ( k )) x= [ η,Uc,ae ] T Rolling optimization: Online solution of quadratic programming problems to minimize control error.

[0033] Where y ref Let λ represent the target coupling state, and λ represent the control weight.

[0034] 3. The implementation method of the multi-physics cooperative control algorithm is as follows: Waves: Wave propagation is described using the nonlinear shallow water equation (NSWE) or the Boussinesq equation; Ocean currents: Based on a simplified model of the Navier-Stokes equations, the Doppler frequency shift effect of current velocity Uc on waves is considered; Earthquake: Random seismic waves were generated using the Kanai-Tajimi spectrum, and shaking table acceleration was measured. a e (t) is used as input.

[0035] Coupling term introduction: Earthquake → Waves: Earthquakes induce seabed vibrations, which are transmitted to the wave field through boundary conditions.

[0036] in: η Wave height α Coupling coefficient H Transfer function Ocean currents → waves: Ocean currents change the speed and direction of wave propagation.

[0037] in: c eff For effective wave velocity, θ The angle between the wave and the current.

[0038] Waves → Ocean Currents: Wave radiation stress drives changes in ocean currents.

[0039] in S xx This represents the wave radiation stress component.

[0040] The present invention also has the following technical effects: 1) Multi-dynamic load coupling simulation: It can simultaneously simulate the coupling effect of various complex underwater dynamic loads such as waves, ocean currents, and earthquakes, and realistically reproduce the dynamic environment during the actual operation of the seabed data cabin 5, making the experimental results more reliable and practical.

[0041] 2) Precision Measurement and Control: Equipped with a variety of high-precision sensors and an advanced data acquisition and control system, it can measure various physical quantities in the experimental process in real time and accurately, and precisely control the dynamic simulation system to ensure the accuracy of experimental data and the repeatability of the experimental process.

[0042] 3) Flexibility and adjustability: The data cabin model installation system in the experimental device can adjust parameters such as the burial depth and tilt angle of the data cabin, and the dynamic simulation system can flexibly set parameters for waves, ocean currents, and earthquakes, which can meet different experimental needs and is suitable for the study of the structural stability and protection of the seabed data cabin under various working conditions.

[0043] 4) Visual observation and analysis: The experimental water tank is made of transparent material, which makes it easy for the experimenters to directly observe the instability process and structural changes of the seabed data cabin under dynamic load. Combined with the collected data for analysis, the instability mechanism of the seabed data cabin can be studied in depth, providing a scientific basis for protection design.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stability test device for a seabed data cabin under complex underwater dynamic conditions, characterized in that, include: The dynamic simulation system, including wave simulation devices, ocean current simulation devices, and earthquake simulation devices, is used to simulate the coupling effects of multiple dynamic loads in a real marine environment. The experimental water tank (11) is covered with seabed soil to simulate the physical and mechanical properties of seabed soil in a real marine environment; The data cabin model is equipped with sensors on its surface and is placed in the experimental water tank (11) to monitor its stress and deformation under dynamic load in real time through the sensors. The measurement and control system is used to synchronously collect the excitation characteristics of various dynamic loads and the stress and deformation data of the data cabin model (5), and to perform parameter adjustment and closed-loop control of the dynamic simulation system.

2. The experimental apparatus for the stability of a seabed data cabin under complex underwater dynamic conditions according to claim 1, characterized in that, The ocean current simulation device includes adjustable-speed axial flow pumps (4) and a flow guiding system located at both ends of the experimental water tank (11) to simulate ocean currents with different flow velocities and directions. The wave simulation device includes a pusher wave generator (3) located at one end of the experimental water tank (11), and a wave-dissipating net (7) located at the other end of the experimental water tank (11); the pusher wave generator (3) performs horizontal reciprocating motion along the guide beam (9) to generate regular and irregular waves with different wave heights, wave periods, and wave spectra. The earthquake simulation device includes a shaking table (6) located at the bottom of the experimental water tank (11) for simulating earthquake waves of different frequencies, amplitudes and durations.

3. The experimental apparatus for the stability of a seabed data cabin under complex underwater dynamic conditions according to claim 2, characterized in that, The flow guiding system includes a flow guide plate and a flow stabilizing grid (8). The guide plate and flow stabilizer (8) are located between the adjustable speed axial flow pump (4) and the experimental water tank (11) to reduce water flow turbulence and vortex.

4. The experimental apparatus for the stability of a seabed data cabin under complex underwater dynamic conditions according to claim 1, characterized in that, The data cabin model (5) is fixed in the experimental water tank (11) by a bracket, and the burial depth and tilt angle of the data cabin model (5) can be adjusted.

5. The experimental apparatus for the stability of a seabed data cabin under complex underwater dynamic conditions according to claim 1, characterized in that, The measurement and control system includes: Multiple sensors are used to monitor in real time the motion state of the shaking table (6), the stress and deformation of the data cabin model under dynamic load, the pore water pressure and soil pressure in the seabed soil, the water flow velocity and wave height; A data acquisition instrument is used to collect real-time monitoring data from sensors. The computer control system is used to process and analyze real-time monitoring data from sensors, and to control the power simulation system in real time based on the analysis results. The human-computer interface is used to display wave, ocean current, and seismic parameters and images of the dynamic simulation system during the experiment.

6. The experimental apparatus for the stability of a seabed data cabin under complex underwater dynamic conditions according to claim 5, characterized in that, The sensors include: a pressure sensor, a displacement sensor, an acceleration sensor, a pore water pressure sensor, and a pressure sensor.

7. A method for testing the stability of a seabed data cabin under complex underwater dynamic conditions, applied to the seabed data cabin stability testing apparatus under complex underwater dynamic conditions as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Prepare simulated seabed soil, lay it in the experimental water tank (11), install the data cabin model (5), and inject clean water into the experimental water tank (11); S2. Activate the wave simulation device, ocean current simulation device, and earthquake simulation device to simulate the generation and propagation characteristics of waves in a real marine environment; S3. Synchronously collect the wave propagation characteristics and the stress and deformation of the data cabin model, and adjust the parameters and perform closed-loop control of the dynamic simulation system. S4. Observe the instability process of the simulated seabed soil under dynamic load and record relevant data; analyze the collected data and evaluate the structural stability of the data cabin model.

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