Experiment bench and method for simulating dynamic load effect of submarine pipeline

Abstract

The invention discloses an experiment bench and method for simulating the dynamic load effect of a submarine pipeline, and relates to the technical field of pipeline engineering.The experiment bench comprises a fixed supporting bench, an impact module, a monitoring module and a control system.The fixed supporting bench comprises two clamping supporting parts, and the two clamping supporting parts are used for clamping the two ends of an experiment pipeline respectively; the impact module is slidably mounted between the two clamping and supporting parts and comprises a horizontal impact part and a vertical impact part, the impact module and the monitoring module are electrically connected with the control system, the horizontal impact part is movably mounted on one side of the experimental pipeline, and the vertical impact part is movably mounted below the experimental pipeline. The monitoring end of the monitoring module is used for being installed on the surface of an experimental pipeline. According to the invention, the change conditions of multiple parameters such as strain, displacement, load acting force and the like of the pipeline to be measured can be monitored in real time under the simulated dynamic load effect.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline engineering, and in particular to an experimental bench and method for simulating dynamic load action of a submarine pipeline. Background Art

[0002] As the main way of transporting energy, pipelines have the advantages of high efficiency, large transport volume and low cost in transporting oil, gas and water. However, pipelines are often located in harsh environments and are affected by natural factors such as waves, tides and sediments, which often cause dents, cracks and corrosion in pipelines, posing a great threat to the safe transportation of energy. Therefore, pipeline maintenance is particularly important.

[0003] In the process of local pipeline maintenance, it is necessary to first conduct local excavation of the pipeline so that the maintenance section of the pipeline is suspended, and then inspect the pipeline by underwater robots or manual diving, and finally perform maintenance by clamps or compliant material winding. However, the working load generated by the pipeline inspection or maintenance equipment during the pipeline maintenance process may cause secondary effects on the original local defects of the pipeline and the suspended section of the pipeline. Therefore, it is often necessary to analyze the strain and displacement of the suspended pipeline during the maintenance process to determine whether the pipeline is within the safe deformation range after the working load.

[0004] However, current analysis methods mainly rely on simulation analysis, which has certain boundary condition assumptions and cannot truly reflect the actual pipeline situation. This limitation makes it difficult to accurately evaluate the impact of dynamic loads on the overall structure of the pipeline in actual construction, which may lead to misjudgment of the safety status of the pipeline. Summary of the invention

[0005] The purpose of the present invention is to provide a test bench and method for simulating the dynamic load of a submarine pipeline to solve the problems existing in the above-mentioned prior art. Under the simulated dynamic load, the changes in parameters such as stress, strain, displacement, etc. of the tested pipeline can be monitored in real time.

[0006] To achieve the above object, the present invention provides the following solutions: The present invention provides an experimental bench for simulating the dynamic load effect of a submarine pipeline, comprising a fixed support bench, an impact module, a monitoring module and a control system, wherein the fixed support bench comprises two clamping support parts, the two clamping support parts are respectively used to clamp the two ends of the experimental pipeline, the impact module is slidably installed between the two clamping support parts, and the impact module comprises a horizontal impact part and a vertical impact part, the impact module and the monitoring module are both electrically connected to the control system, the horizontal impact part is used to be movably installed on one side of the experimental pipeline, the vertical impact part is used to be movably installed below the experimental pipeline, and the monitoring end of the monitoring module is used to be installed on the surface of the experimental pipeline.

[0007] Preferably, the clamping support portion includes an anti-dumping base and a support platform, a counterweight is provided in the anti-dumping base, the support platform is fixed to the upper end of the anti-dumping base, and a fixing clamp is installed on the upper end of the support platform, and the fixing clamp is used to clamp the experimental pipeline.

[0008] Preferably, it further comprises a water tank, wherein the fixed support frame and the impact module are both located in the water tank.

[0009] Preferably, two parallel slide rail mechanisms are installed between the two clamping support parts, the length direction of the slide rail mechanism is consistent with the length direction of the experimental pipeline, and the horizontal impact part and the vertical impact part are respectively slidably connected to the two slide rail mechanisms.

[0010] Preferably, the slide rail mechanism includes a slide rail base, a slide rail body, a slide table and a drive motor, the two ends of the slide rail base are respectively connected to the two clamping support parts, the slide rail body is installed in the slide rail base, the slide table is slidably connected to the slide rail body, and the upper end of the slide table is used to install the lower end of the horizontal impact part or the lower end of the vertical impact part, the drive motor is used to drive the slide table to slide along the slide rail body, and the drive motor is electrically connected to the control system.

[0011] Preferably, the horizontal impact part includes a cylinder support frame and a horizontal hydraulic cylinder, the cylinder support frame is located on one side of the experimental pipeline, the lower end of the cylinder support frame is slidably connected between the two clamping support parts, the upper end of the cylinder support frame is connected to the fixed end of the horizontal hydraulic cylinder, the output end of the horizontal hydraulic cylinder is connected to the experimental pipeline through a cylinder clamp, and a pressure sensor is also provided between the output end of the horizontal hydraulic cylinder and the cylinder clamp, and the pressure sensor is electrically connected to the control system.

[0012] Preferably, the vertical impact part includes a vertical hydraulic cylinder, which is located on one side of the experimental pipeline. The lower end of the vertical hydraulic cylinder is slidably connected between the two clamping support parts, and the upper end of the vertical hydraulic cylinder is connected to the experimental pipeline through a cylinder clamp. A pressure sensor is also provided between the output end of the vertical hydraulic cylinder and the cylinder clamp, and the pressure sensor is electrically connected to the control system.

[0013] Preferably, the control system includes a circuit board and hydraulic control components, the circuit board includes a single-chip microcomputer and a driver, the driver is electrically connected to the single-chip microcomputer, the driver is electrically connected to the hydraulic control components, and the horizontal impact part and the vertical impact part are both connected to the hydraulic control components.

[0014] Preferably, the monitoring module includes an optical fiber strain sensor array, an optical fiber demodulator, a host computer, a tension sensor, a displacement sensor and a multi-parameter data acquisition system, the optical fiber strain sensor array is the monitoring end of the monitoring module, the optical fiber strain sensor array is installed on the outer surface of the experimental pipeline, and the optical fiber strain sensor array is placed along the axial and circumferential directions of the experimental pipeline, the optical fiber strain sensor array is connected to the optical fiber demodulator via a cable, the optical fiber demodulator is connected to the host computer via a cable, the optical fiber strain sensor array, the tension sensor and the displacement sensor are all electrically connected to the multi-parameter data acquisition system, and data is stored through the multi-parameter data acquisition system, the multi-parameter data acquisition system is electrically connected to the host computer, and the host computer is electrically connected to the control system.

[0015] The present invention also provides an experimental method for simulating the dynamic load effect of a submarine pipeline, using an experimental bench for simulating the dynamic load effect of a submarine pipeline as described in any one of the above technical solutions, comprising the following steps: S1. Install the experimental pipe on two clamping support parts, connect the output end of the horizontal impact part or the vertical impact part to the experimental pipe, and choose whether to set up a water tank according to the experimental needs; S2. Output a control signal through the control system to move the horizontal impact part or the vertical impact part to a specified position; S3. The control system controls the horizontal impact part to realize horizontal extension and contraction, or controls the vertical impact part to realize vertical lifting and lowering, so that the experimental pipeline is subjected to simulated dynamic working load and generates dynamic strain and displacement. At the same time, the monitoring end of the monitoring module transmits the strain, displacement and load force data of the experimental pipeline in real time, and completes the real-time monitoring of the strain, displacement and load force of the experimental pipeline; S4. After a simulated working condition is completed, if it is necessary to apply load to the remaining positions of the test pipe again, move the horizontal impact part or the vertical impact part to the specified position and repeat S3; if it is necessary to conduct a simulation experiment on test pipes of different specifications, replace the fixing fixture on the clamping support part and the cylinder clamps on the horizontal impact part and the vertical impact part.

[0016] Compared with the prior art, the present invention has achieved the following technical effects: The present invention provides an experimental bench and method for simulating the dynamic load effect on a submarine pipeline. The fixed support bench includes two clamping support parts, which are respectively used to clamp the two ends of the experimental pipeline. The impact module is slidably installed between the two clamping support parts, so that the impact position can be adjusted, and the experimental pipelines of different diameters can be replaced. Experiments are carried out at different positions and working conditions of the experimental pipeline, and the dynamic strain of the specified position of the experimental pipeline is monitored in real time. The influence of the working load during the maintenance and construction of the suspended pipeline on the strain state of the pipeline is simulated, so as to realize the strain state analysis of the pipeline under different load conditions, which will be compared with the dynamic strain data obtained by the subsequent strain monitoring device for the actual pipeline, so as to Evaluate the effectiveness and accuracy of the monitoring device; the impact module includes a horizontal impact part and a vertical impact part. Both the impact module and the monitoring module are electrically connected to the control system, which can control the working conditions of the experimental pipeline to more accurately simulate the working load of the actual pipeline. The horizontal impact part is used to be movably installed on one side of the experimental pipeline to provide horizontal load simulation for the experimental pipeline. The vertical impact part is used to be movably installed below the experimental pipeline to provide vertical load simulation for the experimental pipeline. The monitoring end of the monitoring module is used to be installed on the surface of the experimental pipeline to monitor the strain data of the experimental pipeline in real time, and the obtained strain data is transmitted so that the strain condition of the experimental pipeline can be monitored in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the experimental stand for simulating the dynamic load of a submarine pipeline in Example 1 when a water tank is set; Figure 2 This is a schematic structural diagram of the experimental bench for simulating the dynamic load of a submarine pipeline in Example 1 when no water tank is provided; Figure 3This is a flow chart of the experimental method for simulating the dynamic load effect on the submarine pipeline in Example 2; In the figure: 1-water tank, 2-anti-dump base, 3-support table, 4-fixing fixture, 5-slide mechanism, 6-slide table, 7-vertical hydraulic cylinder, 8-cylinder support frame, 9-horizontal hydraulic cylinder, 10-cylinder clamp, 11-optical fiber strain sensor array, 12-optical fiber demodulator, 13-multi-parameter data acquisition system, 14-control system, 15-host computer. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The purpose of the present invention is to provide a test bench and method for simulating the dynamic load of a submarine pipeline to solve the problems existing in the prior art. Under the simulated dynamic load, the changes in multiple parameters such as strain, displacement, load force, etc. of the tested pipeline can be monitored in real time.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Embodiment 1 like Figure 1-Figure 2As shown, this embodiment provides an experimental bench for simulating the dynamic load effect on a submarine pipeline, including a fixed support bench, an impact module, a monitoring module and a control system 14. The fixed support bench includes two clamping support parts, and the two clamping support parts are respectively used to clamp the two ends of the experimental pipeline. The impact module is slidably installed between the two clamping support parts, so that the impact position can be adjusted, and the dynamic strain of the specified position of the experimental pipeline can be monitored in real time by replacing the experimental pipelines of different diameters and conducting experiments at different positions and working conditions of the experimental pipeline, simulating the influence of the working load during the maintenance construction of the suspended pipeline on the strain state of the pipeline, so as to realize the strain state analysis of the pipeline under different load conditions, which will be compared with the dynamic strain data obtained by the strain monitoring device for the actual pipeline in the future. , so as to evaluate the effectiveness and accuracy of the monitoring device; the impact module includes a horizontal impact part and a vertical impact part, and the impact module and the monitoring module are both electrically connected to the control system 14, which can control the working conditions of the experimental pipeline to more accurately simulate the working load of the actual pipeline. The horizontal impact part is used to be movably installed on one side of the experimental pipeline to provide a horizontal load simulation for the experimental pipeline, and the vertical impact part is used to be movably installed below the experimental pipeline to provide a vertical load simulation for the experimental pipeline, so that the designated part of the experimental pipeline obtains impact and generates strain. The monitoring end of the monitoring module is used to be installed on the surface of the experimental pipeline to monitor the strain data of the experimental pipeline in real time, and transmit the obtained strain data so that the strain condition of the experimental pipeline can be monitored in real time.

[0023] Specifically, the clamping support part includes an anti-dumping base 2 and a support platform 3. A counterweight is provided in the anti-dumping base 2 to prevent the fixed support platform from tipping over during the experiment. The support platform 3 is fixed to the upper end of the anti-dumping base 2, and a fixing clamp 4 is installed on the upper end of the support platform 3. The fixing clamp 4 is used to clamp the experimental pipe to fix the experimental pipe. At the same time, by replacing the fixing clamp 4, it is also possible to clamp experimental pipes of different diameters, so as to facilitate experiments on different experimental pipes.

[0024] The present embodiment further includes a water tank 1, in which the fixed support frame and the impact module are both located. The water tank 1 is filled with seawater to simulate the marine environment. In actual application, the seawater injected into the water tank 1 completely submerges the experimental frame simulating the dynamic load of the submarine pipeline to truly simulate the marine environment. In addition, in actual application, technicians in this field can choose whether to simulate the sea conditions according to actual needs.

[0025] Two parallel slide rail mechanisms 5 are installed between the two clamping support parts. The length direction of the slide rail mechanism 5 is consistent with the length direction of the experimental pipeline. The horizontal impact part and the vertical impact part are respectively slidably connected to the two slide rail mechanisms 5 to limit the horizontal impact part and the vertical impact part during the movement process, ensuring that they can accurately act on the experimental pipeline.

[0026] The slide rail mechanism 5 includes a slide rail base, a slide rail body, a slide 6 and a driving motor. The two ends of the slide rail base are respectively connected to two clamping support parts. The slide rail body is installed in the slide rail base. The slide 6 is slidably connected to the slide rail body, and the upper end of the slide 6 is used to install the lower end of the horizontal impact part or the lower end of the vertical impact part. The driving motor is used to drive the slide 6 to slide along the slide rail body. The driving motor is electrically connected to the control system 14, so that the driving motor drives the slide 6 to move, and the operation of the driving motor is controlled by the control system 14.

[0027] The horizontal impact part includes a cylinder support frame 8 and a horizontal hydraulic cylinder 9. The cylinder support frame 8 is located on one side of the experimental pipeline. The lower end of the cylinder support frame 8 is slidably connected between the two clamping support parts. The upper end of the cylinder support frame 8 is connected to the fixed end of the horizontal hydraulic cylinder 9. The output end of the horizontal hydraulic cylinder 9 is connected to the experimental pipeline through the cylinder clamp 10, thereby realizing the clamping fit between the horizontal hydraulic cylinder 9 and the experimental pipeline. A pressure sensor is also provided between the output end of the horizontal hydraulic cylinder 9 and the cylinder clamp 10. The pressure sensor is electrically connected to the control system 14, and the operating pressure of the hydraulic system in which the horizontal hydraulic cylinder 9 is located is detected through the pressure sensor.

[0028] The vertical impact part includes a vertical hydraulic cylinder 7, which is located on one side of the experimental pipeline. The lower end of the vertical hydraulic cylinder 7 is slidably connected between the two clamping supports, and the upper end of the vertical hydraulic cylinder 7 is connected to the experimental pipeline through a cylinder clamp 10, thereby realizing a tight fit between the vertical hydraulic cylinder 7 and the experimental pipeline. A pressure sensor is also provided between the output end of the vertical hydraulic cylinder 7 and the cylinder clamp 10, and the pressure sensor is electrically connected to the control system 14, so that the operating pressure of the hydraulic system in which the vertical hydraulic cylinder 7 is located is detected through the pressure sensor.

[0029] In order to adapt to the working conditions in the water tank 1, the horizontal hydraulic cylinder 9 and the vertical hydraulic cylinder 7 both have waterproof and pressure-resistant properties.

[0030] The control system 14 includes a circuit board and hydraulic control components. The circuit board includes a single chip microcomputer and a driver. The driver is electrically connected to the single chip microcomputer, and the driver is electrically connected to the hydraulic control components. The horizontal impact part and the vertical impact part are both connected to the hydraulic control components. The hydraulic control components include an oil tank, a hydraulic pump, and various valves. The hydraulic pump is connected to the oil tank through an oil pipe. The hydraulic pump is connected to the hydraulic cylinder through an oil pipe through various valves. In addition, the travel switch that limits the range of motion of the hydraulic cylinder piston rod needs to be electrically connected to the control system 14.

[0031] The monitoring module includes an optical fiber strain sensor array 11, an optical fiber demodulator 12, a host computer 15, a tension sensor, a displacement sensor and a multi-parameter data acquisition system 13. Through the cooperation of the pressure sensor, the tension sensor and the displacement sensor, the applied working load can be made more accurate. The optical fiber strain sensor array 11 is the monitoring end of the monitoring module. The optical fiber strain sensor array 11 is installed on the outer surface of the experimental pipeline, and the optical fiber strain sensor array 11 is placed along the axial and circumferential directions of the experimental pipeline, and the optical demodulator continuously sends and receives signals to obtain real-time data of the experimental pipeline strain. The optical fiber strain sensor array 11 The fiber demodulator 12 is connected to the host computer 15 through a cable; the tension sensor is installed at the horizontal hydraulic cylinder 9 and the vertical hydraulic cylinder 7, and the tension sensor is used to detect the magnitude of the force applied to the experimental pipeline by the horizontal hydraulic cylinder 9 and the vertical hydraulic cylinder 7, so as to detect the load applied to the experimental pipeline by the horizontal hydraulic cylinder 9 and the vertical hydraulic cylinder 7, and the change of the load applied to the experimental pipeline by the cylinder clamp 10 is regulated by the control system 14; the displacement sensor is set close to the experimental pipeline, and the displacement sensor is used to detect the displacement of the experimental pipeline under the load. The fiber strain sensor array 11, the pressure sensor, the tension sensor and the displacement sensor are all electrically connected to the multi-parameter data acquisition system 13, and the data is stored through the multi-parameter data acquisition system 13, the multi-parameter data acquisition system 13 is electrically connected to the host computer 15, and the host computer 15 is electrically connected to the control system 14. The fiber strain sensor array 11 monitors the strain data in real time, and transmits the strain data to the fiber demodulator 12, and the fiber demodulator 12 transmits the processed data to the host computer 15.

[0032] Embodiment 2 like Figure 3 As shown, this embodiment provides an experimental method for simulating the dynamic load of a submarine pipeline, using the experimental bench for simulating the dynamic load of a submarine pipeline in Embodiment 1, mainly including the process of setting up the experimental bench for simulating the dynamic load of a submarine pipeline, and the process of force and data collection of the experimental pipeline, wherein: The process of setting up the test bench to simulate the dynamic load of submarine pipelines includes: The experimental pipeline is installed on two fixing fixtures 4 of the fixed support stand. At the same time, the output end of the horizontal hydraulic cylinder 9 or the output end of the vertical hydraulic cylinder 7 is connected to the experimental pipeline through the cylinder clamp 10. The upper computer 15 sends a signal to the control system 14, and the control system 14 outputs a control signal of the slide rail mechanism 5. The control signal controls the drive motor to move the slide 6 to the specified position, and the optical fiber demodulator 12 and the multi-parameter data acquisition system 13 are turned on to start real-time recording of the strain of the experimental pipeline. Then, seawater is injected into the water tank 1 until the experimental stand simulating the dynamic load of the submarine pipeline is completely submerged; The stress and data collection process of the experimental pipeline includes: The control system 14 outputs control signals of various valve components and hydraulic pumps to drive various valve components and hydraulic pumps to work, so that the horizontal hydraulic cylinder 9 and the vertical hydraulic cylinder 7 can respectively realize horizontal and vertical telescopic movements, thereby subjecting the experimental pipeline to a controllable simulated dynamic working load, so that the experimental pipeline can produce dynamic strain. At the same time, the pressure sensor, tension sensor, displacement sensor and optical fiber strain sensor array 11 transmit the strain, displacement and load force data of the experimental pipeline to the multi-parameter data acquisition system in real time. The multi-parameter data acquisition system transmits the obtained data to the host computer 15 for storage. After data processing by professionals, the working load of the pipeline and the strain of the monitored part can be obtained, thereby completing the real-time monitoring of the strain, displacement and load force of the experimental pipeline.

[0033] After a simulated working condition is completed, if it is necessary to apply load to the remaining positions of the experimental pipeline again, move the slide 6 to the specified position and repeat the above operation; if it is necessary to conduct a simulation experiment on experimental pipelines of different specifications, replace the fixing fixture 4 and the cylinder clamp 10 with other specifications.

[0034] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A test bench for simulating the dynamic load of a submarine pipeline, characterized by: It includes a fixed support frame, an impact module, a monitoring module and a control system. The fixed support frame includes two clamping support parts, and the two clamping support parts are respectively used to clamp the two ends of the experimental pipeline. The impact module is slidably installed between the two clamping support parts, and the impact module includes a horizontal impact part and a vertical impact part. The impact module and the monitoring module are both electrically connected to the control system. The horizontal impact part is used to be movably installed on one side of the experimental pipeline, and the vertical impact part is used to be movably installed below the experimental pipeline. The monitoring end of the monitoring module is used to be installed on the surface of the experimental pipeline.

2. The test bench for simulating dynamic load of submarine pipeline according to claim 1 is characterized by: The clamping support part includes an anti-dumping base and a support platform. A counterweight is arranged inside the anti-dumping base. The support platform is fixed to the upper end of the anti-dumping base. A fixing clamp is installed on the upper end of the support platform. The fixing clamp is used to clamp the experimental pipeline.

3. The test bench for simulating dynamic load of submarine pipeline according to claim 1 is characterized by: It also includes a water tank, in which the fixed support frame and the impact module are both located.

4. The test bench for simulating dynamic load of submarine pipeline according to claim 1 is characterized in that: Two parallel slide rail mechanisms are installed between the two clamping support parts. The length direction of the slide rail mechanism is consistent with the length direction of the experimental pipeline. The horizontal impact part and the vertical impact part are respectively slidably connected to the two slide rail mechanisms.

5. The test bench for simulating dynamic load of submarine pipeline according to claim 4 is characterized in that: The slide rail mechanism includes a slide rail base, a slide rail body, a slide table and a drive motor, the two ends of the slide rail base are respectively connected to the two clamping support parts, the slide rail body is installed in the slide rail base, the slide table is slidably connected to the slide rail body, and the upper end of the slide table is used to install the lower end of the horizontal impact part or the lower end of the vertical impact part, the drive motor is used to drive the slide table to slide along the slide rail body, and the drive motor is electrically connected to the control system.

6. The test bench for simulating dynamic load of submarine pipeline according to claim 1 is characterized by: The horizontal impact part includes a cylinder support frame and a horizontal hydraulic cylinder. The cylinder support frame is located on one side of the experimental pipeline. The lower end of the cylinder support frame is slidably connected between the two clamping support parts. The upper end of the cylinder support frame is connected to the fixed end of the horizontal hydraulic cylinder. The output end of the horizontal hydraulic cylinder is connected to the experimental pipeline through a cylinder clamp. A pressure sensor is also provided between the output end of the horizontal hydraulic cylinder and the cylinder clamp. The pressure sensor is electrically connected to the control system.

7. The test bench for simulating dynamic load of submarine pipeline according to claim 1 is characterized by: The vertical impact part includes a vertical hydraulic cylinder, which is located on one side of the experimental pipeline. The lower end of the vertical hydraulic cylinder is slidably connected between the two clamping support parts, and the upper end of the vertical hydraulic cylinder is connected to the experimental pipeline through a cylinder clamp. A pressure sensor is also provided between the output end of the vertical hydraulic cylinder and the cylinder clamp, and the pressure sensor is electrically connected to the control system.

8. The test bench for simulating dynamic load of submarine pipeline according to claim 6 or 7, characterized in that: The control system includes a circuit board and hydraulic control components. The circuit board includes a single-chip microcomputer and a driver. The driver is electrically connected to the single-chip microcomputer, the driver is electrically connected to the hydraulic control components, and the horizontal impact part and the vertical impact part are both connected to the hydraulic control components.

9. The test bench for simulating dynamic load of submarine pipeline according to claim 1, characterized in that: The monitoring module includes an optical fiber strain sensor array, an optical fiber demodulator, a host computer, a tension sensor, a displacement sensor and a multi-parameter data acquisition system. The optical fiber strain sensor array is the monitoring end of the monitoring module. The optical fiber strain sensor array is installed on the outer surface of the experimental pipeline, and the optical fiber strain sensor array is placed along the axial and circumferential directions of the experimental pipeline. The optical fiber strain sensor array is connected to the optical fiber demodulator via a cable, and the optical fiber demodulator is connected to the host computer via a cable. The optical fiber strain sensor array, the tension sensor and the displacement sensor are all electrically connected to the multi-parameter data acquisition system, and data is stored through the multi-parameter data acquisition system. The multi-parameter data acquisition system is electrically connected to the host computer, and the host computer is electrically connected to the control system.

10. An experimental method for simulating dynamic load action on a submarine pipeline, characterized in that: The experimental bench for simulating the dynamic load of a submarine pipeline according to any one of claims 1 to 9 comprises the following steps: S1. Install the experimental pipe on two clamping support parts, connect the output end of the horizontal impact part or the vertical impact part to the experimental pipe, and choose whether to set up a water tank according to the experimental needs; S2. Output a control signal through the control system to move the horizontal impact part or the vertical impact part to a specified position; S3. The control system controls the horizontal impact part to realize horizontal extension and contraction, or controls the vertical impact part to realize vertical lifting and lowering, so that the experimental pipeline is subjected to simulated dynamic working load and generates dynamic strain and displacement. At the same time, the monitoring end of the monitoring module transmits the strain, displacement and load force data of the experimental pipeline in real time, and completes the real-time monitoring of the strain, displacement and load force of the experimental pipeline; S4. After a simulated working condition is completed, if it is necessary to apply load to the remaining positions of the test pipe again, move the horizontal impact part or the vertical impact part to the specified position and repeat S3; if it is necessary to conduct a simulation experiment on test pipes of different specifications, replace the fixing fixture on the clamping support part and the cylinder clamps on the horizontal impact part and the vertical impact part.

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