Cantilever fluid conveying pipe vibration simulation experiment platform and method with additional weight constraint

Abstract

The invention relates to a cantilever fluid conveying pipe vibration simulation experiment platform and method with additional weight constraint. The experiment platform comprises a cantilever flow conveying pipe system which comprises a vertical experiment pipeline, a heavy block and a fluorescent ball; the heavy block and the fluorescent ball are fixed on the experimental pipeline; the fluid conveying and control system is provided with a water outlet end; the water outlet end is communicated with the experimental pipeline through a water supply pipe; a flow meter attached to the water supply pipe; the infrared camera collects the action of the fluorescent ball; the data collecting and processing system comprises a data collector and a data processor. The method is a method for carrying out an experiment by adopting the experiment platform. According to the invention, vibration conditions of the cantilever fluid conveying pipe under different load conditions in actual engineering can be simulated, and a plurality of key motion parameters such as displacement, speed and acceleration of the pipeline in the vibration process can be tested, so that a theoretical basis is provided for installation and maintenance of the cantilever fluid conveying pipe with an additional heavy block; effective control over vibration of the cantilever fluid conveying pipe is achieved, the use performance of the cantilever fluid conveying pipe is improved, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of pipeline vibration analysis, and particularly to a vibration simulation experimental platform and method for a cantilevered fluid conveying pipe with an additional weight constraint. Background Art

[0002] In a complex marine environment, the cantilevered fluid conveying pipe plays a crucial role in the oil and gas transportation field by virtue of its unique structural and performance advantages, ensuring the efficient and stable transportation of deep-sea oil and gas from the extraction point to the onshore terminal. At the same time, in the fields related to sustainable development such as ocean thermal energy conversion and seawater desalination, the cantilevered fluid conveying pipe has also become an indispensable important part due to its high-efficiency conveying capacity, providing solid technical support for the comprehensive development and utilization of marine resources.

[0003] Although the cantilevered fluid conveying pipe has advantages such as flexible structure and adaptability to complex sea conditions in marine engineering fluid transportation, in actual applications, due to factors such as water pressure, ocean currents, waves, and internal fluids, the cantilevered fluid conveying pipe undergoes structural deformation and vibration. Under the combined action of many adverse factors, the operating conditions of the cantilevered fluid conveying pipe are significantly negatively affected, its service performance is greatly reduced, and its effective service life is also significantly shortened. In view of a series of problems caused by the structural vibration of the cantilevered fluid conveying pipe during operation, many scholars have devoted themselves to related research aiming to explore effective suppression means. Among many exploration directions, the method of additional weight constraint has attracted much attention, and extensive and in-depth research has been carried out in this regard by predecessors.

[0004] The dynamic characteristics of the cantilevered fluid conveying pipe itself contain many complex theoretical problems that need to be analyzed, which involve multiple aspects such as the non-linear interaction between fluid and structure, the deformation and stress distribution of the pipeline under complex marine loads, etc. When the method of additional weight is used to try to suppress its structural vibration, the dynamic complexity of the entire system increases exponentially. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a vibration simulation experimental platform and method for a cantilevered fluid conveying pipe with an additional weight constraint, which can simulate the vibration conditions of the cantilevered fluid conveying pipe under different load conditions in actual engineering, and can experiment on multiple key motion parameters such as displacement, velocity, and acceleration of the pipeline during vibration, so as to provide a theoretical basis for the installation and maintenance of the cantilevered fluid conveying pipe with an additional weight, realize the effective control of the vibration of the cantilevered fluid conveying pipe, and further improve its service performance and extend its service life.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a vibration simulation experimental platform for a cantilevered fluid conveying pipe with an additional weight constraint, comprising:

[0007] A cantilevered pipe conveying fluid system, comprising a vertical experimental pipe, weights and fluorescent balls; the weights are selected according to experimental requirements and fixed at corresponding positions on the experimental pipe according to experimental requirements; the fluorescent balls are selected according to experimental requirements and fixed at corresponding positions on the experimental pipe according to experimental requirements;

[0008] A fluid delivery and control system, having a water outlet end; the water outlet end is communicated with the experimental pipe through a water supply pipe for providing experimental fluid for the cantilevered pipe conveying fluid system;

[0009] A flowmeter, installed on the water supply pipe for collecting data of relevant parameters of the experimental fluid;

[0010] An infrared camera for collecting data of relevant parameters of the fluorescent balls vibrating with the experimental pipe during the experiment;

[0011] A data collection and processing system, comprising a data collector and a data processor; the data collector is connected to the flowmeter and the infrared camera for collecting the data collected by the flowmeter and the infrared camera; the data processor is used for processing the collected data.

[0012] Further, the fluid delivery and control system includes a control cabinet, a centrifugal pump, a control valve, and a water tank; the water tank, the control valve, and the centrifugal pump are sequentially connected through a water supply pipe; the water tank is used for storing experimental fluid, the control valve is used for controlling the opening and closing of the water tank, the centrifugal pump cooperates with the control valve for pumping the experimental fluid in the water tank, and the control cabinet is connected to the centrifugal pump for adjusting the power of the centrifugal pump.

[0013] Further, it further includes an experimental rack; the infrared cameras are selected according to experimental requirements and installed on the experimental rack according to experimental requirements.

[0014] Further, the experimental rack is made of aluminum alloy, the infrared cameras are fixed at the upper frame of the experimental rack, and multiple infrared cameras are arranged around the experimental pipe.

[0015] Further, it further includes a fluid storage barrel, which is placed inside the experimental rack and is used for receiving and storing the experimental fluid output from the experimental pipe.

[0016] Further, the fluid storage barrel is made of transparent material.

[0017] Further, the top end of the experimental pipe is connected to the water supply pipe in a ferrule connection.

[0018] A method for simulating the vibration of a cantilevered pipe conveying fluid with additional weight constraints, comprising the following steps:

[0019] S1. Install and check the experimental device for simulating the vibration of a cantilevered pipe conveying fluid with additional weight constraints;

[0020] S2. Perform the identification and calibration of the fluorescent sphere by the infrared camera;

[0021] S3. Turn on the data collection and processing system and perform the relevant experiment settings;

[0022] S4. Start the fluid delivery and control system;

[0023] S5. Carry out the data collection and processing work.

[0024] Further, step S1 specifically includes the following operations: Determine the experimental purpose and determine the experimental pipeline of what material to use according to the experimental purpose; Determine the weight of the heavy block, fix the fluorescent sphere and the heavy block on the experimental pipeline; Connect the experimental pipeline with the water supply pipe.

[0025] Further, step S4 specifically includes the following operations: Open the control valve, start the centrifugal pump, control the power of the centrifugal pump through the control cabinet, and provide continuous and stable experimental fluid for the experiment; Detect the flowmeter to ensure that the experimental fluid reaches the required flow rate of the experiment.

[0026] Advantages of the present invention: The vibration simulation experimental platform and method of a cantilevered fluid conveying pipe with an attached heavy block constraint of the present invention adopt the method of attaching a heavy block constraint to the experimental pipeline, and can simulate the vibration conditions of the cantilevered fluid conveying pipe under different load conditions in actual engineering; The experimental pipeline can be replaced with different materials to explore the influence of pipeline stiffness change on pipeline vibration; Through the all-round measurement of multiple infrared cameras, multiple key motion parameters such as displacement, velocity and acceleration of the experimental pipeline during the vibration process can be obtained all-round and in real time; The non-contact measurement adopted by the infrared camera will not cause additional interference to the vibration condition of the experimental pipeline; The data collection and processing system can synchronously obtain various parameters of the fluid and the experimental pipeline through the connection with the electromagnetic flowmeter and the infrared camera, and present the vibration condition in the form of a visual image in the data processor; The present invention can provide a theoretical basis for the installation and maintenance of the cantilevered fluid conveying pipe with an attached heavy block, realize the effective control of the vibration of the cantilevered fluid conveying pipe, and further improve its service performance and extend its service life. Description of the Drawings

[0027] Figure 1 Schematic diagram of a vibration simulation experimental platform of a cantilevered fluid conveying pipe with an attached heavy block for an embodiment;

[0028] Figure 2 Schematic diagram of the cantilevered fluid conveying pipe system with attached heavy blocks at different positions for an embodiment;

[0029] Among them, 1 - cantilevered fluid conveying pipe system, 2 - water supply pipe, 3 - fluid conveying and control system, 4 - flowmeter, 5 - infrared camera, 6 - data collector, 7 - data processor, 8 - experimental rack, 9 - fluid storage barrel, 101 - experimental pipeline, 102 - weight, 103 - fluorescent ball, 301 - control cabinet, 302 - centrifugal pump, 303 - control valve, 304 - water tank. Detailed implementation manner

[0030] To deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with the drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the protection scope of the present invention.

[0031] Embodiment

[0032] Please refer to Figure 1 and Figure 2 As shown, this embodiment provides a vibration simulation experimental platform for a cantilevered fluid conveying pipe with attached weight constraints, including:

[0033] The cantilevered fluid conveying pipe system 1 includes a vertical experimental pipeline 101, a weight 102, and a fluorescent ball 103; the weight 102 is selected with a corresponding weight according to the experimental requirements and fixed at a corresponding position on the experimental pipeline 101 according to the experimental requirements; the fluorescent balls 103 are selected with a corresponding number according to the experimental requirements and fixed at corresponding positions on the experimental pipeline 101 according to the experimental requirements;

[0034] The fluid conveying and control system 3 has a water outlet end; the water outlet end is communicated with the experimental pipeline 101 through the water supply pipe 2 for providing experimental fluid for the cantilevered fluid conveying pipe system 1;

[0035] The flowmeter 4 is installed on the water supply pipe 2 for collecting data on relevant parameters of the experimental fluid;

[0036] The infrared camera 5 is used for collecting data on relevant parameters of the fluorescent ball 103 vibrating with the experimental pipeline 101 during the experiment;

[0037] The data collection and processing system includes a data collector 6 and a data processor 7; the data collector is connected to the flowmeter 4 and the infrared camera 5 for collecting the data collected by the flowmeter 4 and the infrared camera 5; the data processor 7 is used for processing the collected data.

[0038] In this embodiment, the experimental pipeline 101 can be made of rubber, polyethylene or steel materials, which can be specifically set according to the experimental requirements.

[0039] Again, such as Figure 2As shown, the heavy block 102 can be at any position in the experimental pipeline 101, and the heavy block 102 can also be replaced with any required weight, so as to study the vibration characteristics of the cantilevered pipeline conveying fluid under the constraints of heavy blocks with different weights and at different positions.

[0040] For another example Figure 2 As shown, there are multiple fluorescent balls 103, which are fixed in groups on the outer surface of the experimental pipeline 101, and the fluorescent balls are effectively identified by an infrared camera using optical motion capture technology; the fluorescent balls 103 are fixed at corresponding positions of the experimental pipeline according to experimental requirements, so as to provide the vibration conditions at corresponding positions of the experimental pipeline 101.

[0041] In this embodiment, the data collected by the flowmeter 4 includes but is not limited to the flow velocity and flow rate of the experimental fluid; the data collected by the infrared camera 5 includes but is not limited to the displacement, velocity, and acceleration of the fluorescent balls; the data collected by the infrared camera 5 is transmitted to the data collector 6 through an optical fiber; the data processor 7 generates a visualization image based on the data collected by the data collector 6 for display.

[0042] Please refer to Figure 1 As shown, the fluid transportation and control system 3 includes a control cabinet 301, a centrifugal pump 302, a control valve 303, and a water tank 304; the water tank 304, the control valve 303, and the centrifugal pump 302 are connected in sequence through a water supply pipe 2; the water tank 304 is used to store the experimental fluid, the control valve 303 is used to control the switch of the water tank 304, the centrifugal pump 302 cooperates with the control valve 303 to extract the experimental fluid in the water tank 304, and the control cabinet 301 is connected to the centrifugal pump 302 to adjust the power of the centrifugal pump 302.

[0043] Please refer to Figure 1 As shown, it further includes an experimental rack 8; the infrared camera 5 is selected in corresponding quantity according to experimental requirements and installed on the experimental rack 8 according to experimental requirements.

[0044] In this embodiment, the experimental rack 8 is made of aluminum alloy. The infrared camera 5 is fixed at the upper frame of the experimental rack, and multiple infrared cameras 5 are arranged around the experimental pipeline. Specifically, multiple infrared cameras 5 are fixed at corresponding positions on the upper frame of the experimental rack 6 through fixing jigs according to experimental requirements to ensure all-round data collection of the cantilevered pipeline conveying fluid system 1; in this embodiment, the experimental rack 8 is an aluminum alloy frame structure, which has the advantages of high strength and light weight; the bottom of the experimental rack 8 is fixed to the ground with bolts.

[0045] Please refer to Figure 1 As shown, it further includes a fluid storage barrel 9. The fluid storage barrel 9 is placed inside the experimental rack 8, and the fluid storage barrel 9 is used to receive and store the experimental fluid output by the experimental pipeline 101. In this embodiment, the fluid storage barrel 9 is made of a transparent material, which is convenient for the observation and identification of the infrared camera 5.

[0046] In this embodiment, the top end of the experimental pipeline 101 is connected to the water supply pipe 2 in a ferrule connection manner; this enables the quick disassembly and assembly of the experimental pipeline 101, facilitating the replacement of the experimental pipeline required for the experiment.

[0047] This embodiment also provides a vibration simulation experiment method for a cantilevered fluid-conveying pipe with additional weight constraints, including the following steps:

[0048] S1. Install and check the vibration simulation experiment device for the cantilevered fluid-conveying pipe with additional weight constraints;

[0049] S2. Conduct the identification and calibration of the fluorescent spheres by the infrared camera;

[0050] S3. Turn on the data collection and processing system and perform the relevant experiment settings;

[0051] S4. Start the fluid delivery and control system;

[0052] S5. Carry out the data collection and processing work.

[0053] In this embodiment, step S1 specifically includes the following operations: Determine the experimental purpose and determine the material of the experimental pipeline according to the experimental purpose; Determine the weight of the weight, fix the fluorescent spheres and the weight on the experimental pipeline; Connect the experimental pipeline to the water supply pipe. Specifically, the fluorescent spheres and the weight can be fixed on the experimental pipeline by pasting (for example, tape).

[0054] In this embodiment, step S2 specifically includes the following operations: Place the L-shaped calibration rod for L calibration; Wave the T-shaped calibration rod for T calibration; Swing the experimental pipeline to check whether the experiment can be carried out.

[0055] In this embodiment, step S2 specifically includes the following operations: Turn on the data processor and connect it to the infrared camera through the data collector; Name the experimental data groups.

[0056] In this embodiment, step S4 specifically includes the following operations: Open the control valve, start the centrifugal pump, and control the power of the centrifugal pump through the control cabinet to provide continuous and stable experimental fluid for the experiment; Detect the flowmeter to ensure that the experimental fluid reaches the required flow rate for the experiment.

[0057] In this embodiment, step S4 specifically includes the following operations: Establish a data storage space through the data processor; Connect to the marker points through the data processor to establish a rigid body; Observe the vibration form of the experimental pipeline; Operate the data processor to collect various parameters of the experimental pipeline; Conduct processing and analysis in the data processor.

[0058] An experimental simulation platform and method for the vibration of a cantilevered fluid-conveying pipe with additional weight constraints in this embodiment can conduct experimental simulations on the vibration patterns of the cantilevered fluid-conveying pipe with additional weight constraints and explore the laws, further analyze the dynamic characteristics of the cantilevered fluid-conveying pipe with additional weight constraints, and then formulate vibration control strategies to effectively manage and control the vibration of the cantilevered fluid-conveying pipe, improve the service performance of the cantilevered fluid-conveying pipe, extend its service life, and provide a more solid and reliable support for many fields such as ocean resource development and seawater utilization.

[0059] The above embodiments should not limit the present invention in any way, and all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A cantilever fluid pipe vibration simulation experimental platform with additional weight constraints, characterized by: include: A cantilever fluid delivery pipe system (1) comprises a vertical experimental pipe (101), a weight block (102) and a fluorescent ball (103); the weight block (102) is selected to have a corresponding weight according to experimental requirements and is fixed to a corresponding position of the experimental pipe (101) according to experimental requirements; the fluorescent ball (103) is selected to have a corresponding number according to experimental requirements and is fixed to a corresponding position of the experimental pipe (101) according to experimental requirements; A fluid delivery and control system (3) having a water outlet; the water outlet is connected to the experimental pipeline (101) through a water supply pipe (2) and is used to provide experimental fluid for the cantilever fluid delivery pipe system (1); A flow meter (4), installed on the water supply pipe (2), for collecting data on parameters related to the experimental fluid; An infrared camera (5) is used to collect data on parameters related to the vibration of the fluorescent ball (103) along with the experimental pipe (101) during the experiment; The data collection and processing system comprises a data collector (6) and a data processor (7); the data collector is connected to a flow meter (4) and an infrared camera (5) and is used to collect data collected by the flow meter (4) and the infrared camera (5); the data processor (7) is used to process the collected data.

2. The cantilever fluid pipe vibration simulation experimental platform with additional weight constraints according to claim 1 is characterized by: The fluid delivery and control system (3) comprises a control cabinet (301), a centrifugal pump (302), a control valve (303), and a water tank (304); the water tank (304), the control valve (303), and the centrifugal pump (302) are connected in sequence through a water supply pipe (2); the water tank (304) is used to store experimental fluid, the control valve (303) is used to control the switch of the water tank (304), the centrifugal pump (302) cooperates with the control valve (303) to extract the experimental fluid from the water tank (304), and the control cabinet (301) is connected to the centrifugal pump (302) to adjust the power of the centrifugal pump (302).

3. The cantilever fluid pipe vibration simulation experimental platform with additional weight constraints according to claim 2 is characterized by: It also includes an experimental frame (8); the corresponding number of the infrared cameras (5) is selected according to the experimental requirements, and the infrared cameras (5) are installed on the experimental frame (8) according to the experimental requirements.

4. The cantilever fluid pipe vibration simulation experimental platform with additional weight constraints according to claim 3 is characterized by: The experimental frame (8) is made of aluminum alloy, the infrared camera (5) is fixed on the upper frame of the experimental frame, and a plurality of infrared cameras (5) are arranged around the experimental pipeline.

5. The cantilever fluid pipe vibration simulation experimental platform with additional weight constraints according to claim 3 is characterized by: It also includes a fluid storage barrel (9), which is placed in the experimental rack (8) and is used to receive and store the experimental fluid output by the experimental pipeline (101).

6. The cantilever fluid pipe vibration simulation experimental platform with additional weight constraints according to claim 5 is characterized by: The fluid storage barrel (9) is made of transparent material.

7. The cantilever fluid pipe vibration simulation experimental platform with additional weight constraints according to claim 2 is characterized by: The top end of the experimental pipeline (101) is connected to the water supply pipe (2) in a ferrule-type manner.

8. A vibration simulation test method for a cantilever fluid conveying pipe with additional weight constraints, characterized in that: A cantilever fluid pipe vibration simulation experimental platform with additional weight constraints as claimed in any one of claims 2 to 7 is used, and the following steps are included: S1. Install and inspect the cantilever fluid pipe vibration simulation experimental device with additional weight constraints; S2, perform identification and calibration of the fluorescent ball by the infrared camera; S3, open the data collection and processing system and perform relevant experimental settings; S4, start the fluid delivery and control system; S5. Carry out data collection and processing.

9. The vibration simulation test method of a cantilever fluid conveying pipe with additional weight constraint according to claim 8, characterized in that: Step S1 specifically includes the following operations: determine the material of the experimental pipeline according to experimental requirements; determine the weight and fixed position of the weight block according to experimental requirements; determine the number and fixed position of the fluorescent balls according to experimental requirements; fix the fluorescent balls and the weight block on the experimental pipeline; connect the experimental pipeline to the water supply pipe.

10. A vibration simulation test method for a cantilever fluid conveying pipe with additional weight constraint according to claim 8 or 9, characterized in that: Step S4 specifically includes the following operations: opening the control valve, starting the centrifugal pump, controlling the power of the centrifugal pump through the control cabinet, and providing continuous and stable experimental fluid for the experiment; and testing the flow meter to ensure that the experimental fluid reaches the flow rate required by the experiment.

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