Mining pipeline vibration analysis experiment system under the synergistic effect of ship hull oscillation and ocean current

Abstract

The application relates to the technical field of marine mineral resource development, and discloses a mining pipeline vibration analysis experiment system under the synergistic action of ship body oscillation and ocean current, which comprises a supporting device, a standard sinusoidal heave- surge system or a roll- pitch system, the standard sinusoidal heave- surge system comprises a support, a motor and a Scotch yoke mechanism, the power input part of the Scotch yoke mechanism is in transmission connection with the motor, the power output part of the Scotch yoke mechanism is connected with the top end of a mining pipe model through a tension meter, the Scotch yoke mechanism is slidably connected with the support along the vertical direction or is slidably connected with the support along the horizontal direction, the roll- pitch system is connected to the bottom of the supporting device or is connected to the power output part of the Scotch yoke mechanism arranged along the vertical direction, and the mining pipe model is connected with the roll- pitch system. The Scotch yoke mechanism has high motion precision and stable output motion, can realize efficient and accurate simulation of oscillation, and can reduce the cost.

Description

Technical Field

[0001] This application relates to the field of marine mineral resource development technology, for example to an experimental system for vibration analysis of mining pipelines under the combined effects of ship hull oscillation and ocean currents. Background Technology

[0002] Deep-sea mining pipes are the only channel connecting seabed relay stations and surface mining vessels, playing a crucial role in marine mineral extraction systems. The main factors causing vibration in deep-sea mining pipes are the linear response induced by the oscillations of the mining vessel and vortex-induced vibrations caused by ocean currents. In practical engineering, the vibration response of the mining pipe induced by the combined effect of these two factors is a significant contributor to pipeline fatigue damage.

[0003] The oscillations of mining vessels can be categorized into six degrees of freedom: heave, roll, pitch, heave, sway, and sway. Among these, heave, roll, and sway are restorative periodic motions. When the encounter period of waves approaches the natural period of these motions, resonance occurs, leading to a sharp increase in the amplitude of the motion. Therefore, heave, roll, and sway have the greatest impact on mining vessels. According to Airy wave theory, under ideal conditions, the motion of water particles on the sea surface and the wave profile are standard sine curves. The resulting heave and sway of the hull are sinusoidal responses of the same frequency, while roll and sway are oscillating motions with a certain period. In addition, the flow state in which the fluid velocity changes periodically with time according to a sine or cosine law is called simple sinusoidal oscillating flow. This type of ocean current also has a significant impact on the vortex-induced vibration of mining pipes.

[0004] While there are some experimental devices for simulating the impact of the marine environment on mining vessels, some of these devices are expensive to build and difficult to maintain; others do not provide accurate simulations and cannot accurately reproduce the vortex-induced vibrations of the mining pipes caused by the standard sinusoidal or simple sinusoidal oscillations experienced by the mining vessel.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0007] This disclosure provides an experimental system for vibration analysis of mining pipelines under the combined effects of ship hull oscillation and ocean currents, in order to improve the accuracy of simulation results and reduce costs.

[0008] In some embodiments, the vibration analysis experimental system for the mining pipe under the combined effects of hull oscillation and ocean currents includes: a support device; a standard sinusoidal heave-swell system, or a roll-pitch system; the standard sinusoidal heave-swell system includes: a support frame disposed on the support device; a motor disposed on the support frame; a Scottish yoke mechanism, the power input of which is connected to the motor, and the power output of which is connected to the top of the mining pipe model via a tension meter; the Scottish yoke mechanism is slidably connected to the support frame in a vertical direction; or, the Scottish yoke mechanism is slidably connected to the support frame in a horizontal direction; the roll-pitch system is connected to the bottom of the support device; or, if the Scottish yoke mechanism is arranged in a vertical direction, the roll-pitch system is connected to the power output of the Scottish yoke mechanism, and the mining pipe model is connected to the roll-pitch system.

[0009] The vibration analysis experimental system for mining pipelines under the combined effects of ship hull oscillation and ocean currents provided in this disclosure can achieve the following technical effects: The experimental system includes a support structure to provide mounting positions for other components. It also includes a standard sinusoidal heave-sway system, or a roll-pitch system. The standard sinusoidal heave-sway system comprises a support frame, a motor, and a Scottish yoke mechanism. The motor serves as the power source, and the Scottish yoke mechanism, mounted in different directions (vertically or horizontally), drives the mining pipe model to perform standard sinusoidal sway or heave motions. The roll-pitch system is connected to the bottom of the support structure, or to the power output of the vertically positioned Scottish yoke mechanism. This system can simulate the heave, sway, roll, and pitch oscillations of a mining pipe vessel, or the vortex-induced vibration of a mining pipe under the influence of a simple sinusoidal oscillating flow. Furthermore, the Scottish yoke mechanism, capable of accurately converting rotational motion into linear sinusoidal motion, offers advantages such as relatively simple structure, high motion accuracy, and smooth output motion. Its application in this experimental system enables efficient and accurate simulation of mining vessel oscillations while reducing costs.

[0010] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Attached Figure Description

[0011] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein: Figure 1This is a schematic diagram of the Scottish yoke mechanism arranged in the vertical direction in the vibration analysis experimental system of the mining pipeline under the combined action of ship hull oscillation and ocean current provided in this embodiment of the disclosure; Figure 2 This is a schematic diagram of the Scottish yoke mechanism arranged in the horizontal direction in the vibration analysis experimental system of the mining pipeline under the combined action of ship hull oscillation and ocean current provided in this embodiment of the disclosure; Figure 3 This is a schematic diagram of the roll-pitch system in the vibration analysis experimental system of a mining pipeline under the combined action of ship oscillation and ocean current provided in this embodiment of the disclosure; Figure 4 This is a schematic diagram of the Scottish yoke mechanism arranged in the vertical direction provided in the embodiments of this disclosure; Figure 5 This is a schematic diagram of the transmission arm in the Scottish yoke mechanism provided in this embodiment; Figure 6 This is a schematic diagram of the Scottish yoke mechanism arranged in the horizontal direction provided in an embodiment of this disclosure.

[0012] Figure label: 10. Support device; 11. First support structure; 12. Second support structure; 13. Corner bracket; 14. Fixing plate; 20. Bracket; 21. First slide groove; 30. Motor; 31. Support frame; 40. Scottish yoke mechanism; 41. Slide rod; 411. Guide rail; 42. Connecting part; 421. Sliding groove; 43. Transmission arm; 431. Rotating support arm; 432. Second slide groove; 433. Sliding part; 434. Rotating part; 50. Tension gauge; 60. Mining pipe model; 61. Marker point; 71. First connecting rod; 72. First support arm; 73. Second support arm; 74. First stop block; 75. Second stop block; 80. Floating platform; 90. Second connecting rod; 91. Rod body; 92. Slider; 100. Fixed support; 110. Image acquisition module; 111. Non-invasive high-speed camera; 120. Data acquisition terminal. Detailed Implementation

[0013] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0014] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0015] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0016] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0017] Unless otherwise stated, the term "multiple" means two or more.

[0018] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0019] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0021] Combination Figures 1 to 3 As shown, this disclosure provides a vibration analysis experimental system for mining pipelines under the combined effects of ship oscillation and ocean currents. The experimental system includes a support device 10, and further includes a standard sinusoidal heave-sway system, or a roll-pitch system.

[0022] The standard sinusoidal heave-sway system includes: support frame 20, motor 30 and Scottish yoke mechanism 40.

[0023] See Figure 1 and Figure 4 When simulating the standard sinusoidal heave motion of the mining pipe model 60: The support 20 is detachably connected to the side of the support device 10 along the vertical direction. The motor 30 is connected to the support 20 via a support frame 31, and the power output shaft of the motor 30 is horizontal. The Scottish yoke mechanism 40 is slidably connected to the side of the support 20 along the vertical direction. See also... Figure 2 and Figure 6 When simulating the standard sinusoidal oscillation motion of the mining pipe model 60: the support 20 is detachably connected to the top of the support device 10 along the horizontal direction. The motor 30 is connected to the support 20 via the support frame 31, and the power output shaft of the motor 30 is in a vertical position. The Scottish yoke mechanism 40 is slidably connected to the top of the support 20 along the horizontal direction.

[0024] The Scottish yoke mechanism has a power input section and a power output section. The power input section is connected to the power output shaft of the motor 30, and the power output section is connected to the top of the mining pipe model 60 via a tension meter 50. When the Scottish yoke mechanism 40 is set vertically, it converts the rotational motion of the motor 30 into linear motion, thereby driving the mining pipe model 60 to reciprocate up and down, performing standard sinusoidal heave motion. When the Scottish yoke mechanism 40 is set horizontally, it converts the rotational motion of the motor 30 into linear motion, thereby driving the mining pipe model 60 to reciprocate left and right, performing standard sinusoidal oscillation motion. Alternatively, the standard sinusoidal heave-oscillation system can simulate the vortex-induced vibration of the mining pipe model 60 under the action of a simple sinusoidal oscillating flow.

[0025] The roll-to-roll system is connected to the bottom of the support device 10, and the mining pipe model 60 is connected to the roll-to-roll system, thus performing roll or pitch motion under the drive of the roll-to-roll system. Alternatively, when the Scottish yoke mechanism 40 is set in the vertical direction, the roll-to-roll system is connected to the power output of the Scottish yoke mechanism 40, and the mining pipe model 60 is connected to the roll-to-roll system. In this way, when the roll-to-roll system is started alone, it can drive the mining pipe model 60 to perform roll or pitch motion; when both the Scottish yoke mechanism 40 and the roll-to-roll system are started, they can achieve a synergistic effect of heave-roll, or a synergistic effect under the action of roll-single oscillating flow.

[0026] This disclosure provides an experimental system for analyzing the vibration of a mining pipe under the combined effects of ship oscillation and ocean currents. The system includes a support device 10 for providing mounting positions for other components. It also includes a standard sinusoidal heave-sway system or a roll-pitch system. The standard sinusoidal heave-sway system includes a bracket 20, a motor 30, and a Scottish yoke mechanism 40. The motor 30 serves as the power source, and the Scottish yoke mechanism 40 is installed in different directions, either vertically or horizontally, and can drive the mining pipe model 60 to perform standard sinusoidal sway or heave motion under the drive of the motor 30. The roll-pitch system is connected to the bottom of the support device 10, or to the power output of the vertically positioned Scottish yoke mechanism 40. Thus, this system can simulate the heave, sway, roll, and pitch oscillations of a mining pipe vessel, or simulate the vortex-induced vibration of a mining pipe under the action of a simple sinusoidal oscillating flow. Moreover, the Scottish yoke mechanism 40, as a mechanism that can accurately convert rotational motion into linear sinusoidal motion, has the advantages of relatively simple structure, high motion accuracy, and smooth output motion. Applying it to this experimental system can achieve efficient and accurate simulation of mining ship oscillations and reduce costs.

[0027] Optionally, the mining pipe model 60 is made of PMMA plexiglass tube with a free end (unconstrained) at the bottom to simulate the suspended state of an actual deep-sea mining pipe.

[0028] Optionally, see Figures 4 to 6 The Scottish yoke mechanism 40 includes: a slide bar 41, a connecting part 42, and a drive arm 43. See also... Figure 5 The bracket 20 has a first groove 21 along its own setting direction (vertical or horizontal). See also Figure 6 A guide rail 411 is provided on one side of the slide rod 41. The guide rail 411 is arranged along the length direction of the first slide groove 21 and is slidably embedded in the first slide groove 21. The side of the connecting part 42 is connected to the end of the slide rod 41. Optionally, there are two slide rods 41, and the ends of the two slide rods 41 are respectively connected to opposite sides of the connecting part 42. At least one slide rod 41 is slidably embedded in the first slide groove 21 via the guide rail 411. For example, when the Scottish yoke mechanism 40 is arranged in a vertical direction, the ends of the two slide rods 41 are respectively connected to the upper and lower sides of the connecting part 42 (relative to the upper and lower sides of the connecting part 42). Figure 3 In contrast, the upper slide bar 41 is slidably embedded in the first slide groove 21. When the Scottish yoke mechanism 40 is arranged in the horizontal direction, the ends of the two slide bars 41 are respectively connected to the left and right sides of the connecting part 42 (relative to the horizontal direction). Figure 6 In this regard, the slide bar 41 located on the right side is slidably embedded in the first slide groove 21. The length of the slide bar 41 can be selected according to actual needs.

[0029] See Figure 4 and Figure 6 The connecting part 42 is provided with a sliding groove 421, and the length direction of the sliding groove 421 is perpendicular to the sliding direction of the slide rod 41. The first side of the transmission arm 43 is connected to the power output shaft of the motor 30, and the second side of the transmission arm 43 is provided with a power output end. The first and second sides of the transmission arm 43 are opposite sides, with the first side facing the power output shaft of the motor 30. The connection position between the transmission arm 43 and the motor 30 is close to one end of the transmission arm 43, and the power output end of the transmission arm 43 is located close to the other end of the transmission arm 43. The power output end of the transmission arm 43 is rotatably embedded in the sliding groove 421, thus forming a grooved mechanical connection with the sliding groove 421.

[0030] After the motor 30 starts, it drives the transmission arm 43 to rotate via its own power output shaft, and the power output end of the transmission arm 43 also rotates accordingly. Due to the restriction of the sliding groove 421, the connecting part 42 reciprocates in a straight line, thereby driving the slide rod 41 to reciprocate in a straight line. Therefore, the slide rod 41 serves as the final power output end of the Scottish yoke mechanism 40. The mining pipe model 60 is in a vertically suspended state and is connected to a slide rod 41 via a tension meter 50. For example, see... Figure 4 When the Scottish yoke mechanism 40 is set vertically, the top of the mining pipe model 60 is connected to the bottom of the slide bar 41 located on the lower side via a tension gauge 50. See also Figure 6 When the Scottish yoke mechanism 40 is set in the horizontal direction, the mining pipe model 60 is connected to the bottom surface of the slide bar 41 located on the right side via the tension meter 50.

[0031] Combination Figure 4 and Figure 5 As shown, optionally, the transmission arm 43 includes a rotating support arm 431 and a sliding knob assembly. The first side of the rotating support arm 431 faces the power output shaft of the motor 30 and is drively connected to it. The second side of the rotating support arm 431 is opposite to its first side, and a second groove 432 is provided on the second side along the length of the slide rod 41. The sliding knob assembly serves as the power output end of the transmission arm 43, with one side embedded in the second groove 432 and the other side rotatably embedded in the sliding slot opening 421. Thus, the rotating support arm 431 rotates under the drive of the motor 30, and transmits force to the connecting part 42 through the sliding knob assembly, thereby driving the connecting part 42 and the slide rod 41 to perform linear reciprocating motion.

[0032] See you again Figure 5Optionally, the sliding knob assembly includes a sliding part 433 and a rotating part 434. The sliding part 433 is cubic and is embedded in the second slide groove 432, and can slide along the second slide groove 432. When the sliding part 433 slides to a preset position, it is fixed in the preset position by fasteners, such as pins, bolts, etc. The rotating part 434 is cylindrical and is connected to the sliding part 433 and is rotatably embedded in the sliding groove opening 421. By adjusting the position of the sliding part 433 in the second slide groove 432, the length of the lever arm can be changed, thereby adjusting the swing amplitude of the connecting part 42 to simulate different degrees of vibration.

[0033] Combination Figure 1 , Figure 4 and Figure 6 As shown, optionally, a fixed support 100 is installed at the top of the mining pipe model 60, and the fixed support 100 is connected to the tension gauge 50.

[0034] Optionally, the support device 10 includes a first support structure 11 and a second support structure 12. The bottom of the first support structure 11 is fixed to the top of the water tank by a fixing plate 14. See also Figure 2 A horizontally positioned Scottish yoke mechanism 40 is mounted on top of the first support structure 11. See also... Figure 1 The bottom of the second support structure 12 is detachably connected to the top of the first support structure 11, and a vertically arranged Scottish yoke mechanism 40 is installed on the side of the second support structure 12. When simulating standard sinusoidal longitudinal vibration, the Scottish yoke mechanism 40 is vertically arranged on the side of the second support structure 12. When simulating standard sinusoidal heave vibration, the second support structure 12 is removed, and the Scottish yoke mechanism 40 is horizontally arranged on the top of the first support structure 11. This allows for easy disassembly and reassembly as needed.

[0035] Optionally, the bottom of the second support structure 12 is connected to the top of the first support structure 11 via a corner bracket 13.

[0036] Optionally, the first support structure 11 and the second support structure 12 are frame structures formed by connecting multiple rods. This saves materials while meeting the support requirements.

[0037] Optionally, see again Figure 3 The roll-pitch system includes: a first connecting rod 71, a magnet guide arm, a floating platform 80, and a second connecting rod 90. The first end of the first connecting rod 71 ( Figure 3The upper end (shown) is connected to the bottom of the support device 10, i.e., the bottom of the first support structure 11. Alternatively, the top end of the first connecting rod 71 is connected to the power output part of the Scottish yoke mechanism 40 arranged vertically. The magnet guide arm is connected to the side of the first connecting rod 71, and at the same time, the magnet guide arm provides different guiding directions. The floating platform 80 is a square plate-shaped platform. The floating platform 80 includes a top surface, a bottom surface, and four sides. The center position of the top surface of the floating platform 80 is connected to the second end (shown) of the first connecting rod 71 via a hinge. Figure 3 The bottom end (shown) is hinged to the top of the mining pipe model 60 via a tension meter 50. One side is hinged to the first end of the second connecting rod 90. The second end of the second connecting rod 90 is slidably connected to the magnetic guide arm, and an inductor coil is provided at the second end of the second connecting rod 90. When the inductor coil is energized, it generates magnetism, which in turn generates an electromagnetic force between the inductor coil and the magnetic guide arm. Changing the current in the inductor coil can change the direction of the electromagnetic force, thereby driving the second end of the second connecting rod 90 to perform linear reciprocating motion. At the same time, in conjunction with the guiding direction of the magnetic guide arm, the second end of the second connecting rod 90 can be made to reciprocate in different directions, thereby causing the mining pipe model 60 to perform lateral or longitudinal motion.

[0038] Optionally, the magnet guide arm includes a first arm 72 and a second arm 73 on which magnets are uniformly arranged. Both the first arm 72 and the second arm 73 are horizontally arranged. The first end of the first arm 72 is connected to the side of the first connecting rod 71, and the second end is a free end. The first end of the second arm 73 is also connected to the side of the first connecting rod 71, and the second end is a free end. Meanwhile, the first arm 72 and the second arm 73 are perpendicular to each other in the horizontal plane.

[0039] The second connecting rod 90 includes a rod body 91 and a slider 92. The first end of the rod body 91 is hinged to the side of the floating platform 80 via a hinge. An inductor coil is wound around the surface of the slider 92. The bottom of the slider 92 is hinged to the second end of the rod body 91 via a hinge. A through hole is also provided on the slider 92 along the horizontal direction. When the first arm 72 passes through the through hole, the inductor coil is energized, and the slider 92 reciprocates along the first arm 72, thereby causing the mining pipe model 60 to perform periodic rolling motion. When the second arm 73 passes through the through hole, the inductor coil is energized, and the slider 92 reciprocates along the second arm 73, thereby causing the mining pipe model 60 to perform periodic pitching motion. Thus, by sliding the slider 92 onto the first arm 72 or the second arm 73, and in conjunction with the hinge structure, the simulation of rolling and pitching vibrations is achieved.

[0040] Optionally, the magnet guide arm further includes a first stop 74 and a second stop 75. The first stop 74 is disposed at the second end of the first support arm 72, and the second stop 75 is disposed at the second end of the second support arm 73. This prevents the slider 92 from slipping off the first support arm 72 / second support arm 73.

[0041] See you again Figure 1 The vibration analysis experimental system for mining pipelines under the combined effects of ship hull oscillation and ocean currents also includes an image acquisition module 110 and a data acquisition terminal 120. The outer wall of the mining pipe model 60 is uniformly marked with black marker points 61 along its axial direction for vibration trajectory identification. The image acquisition module 110 is located outside the water tank and is used to acquire images of the IL and CF surfaces of the mining pipe model 60 to collect vibration process data. Optionally, the image acquisition module 110 includes two non-invasive high-speed cameras 111 to acquire images of the IL and CF surfaces, respectively. The data acquisition terminal 120 is communicatively connected to the tension meter 50 and the image acquisition module 110.

[0042] During the experiment, the image acquisition module 110 captures the motion trajectory of the marker point 61 on the mining pipe model 60 in real time and transmits the captured data to the data acquisition terminal 120. The data acquisition terminal 120 analyzes the position coordinates of each marker point 61 at different times and the tension detected by the tension meter to calculate the vibration displacement data of the marker point 61 in the IL and CF directions, thereby obtaining the vibration response characteristics of the entire mining pipe model 60.

[0043] The vibration analysis experimental system for mining pipelines under the combined effects of ship hull oscillation and ocean currents also includes a control system. The control system is communicatively connected to motor 30, providing power and motion control for the entire system.

[0044] The vibration analysis experimental system for mining pipelines under the combined effects of ship hull oscillation and ocean currents provided in this embodiment can be used to simulate multiple operating conditions: Vibration simulation under the combined action of pitch and ocean current: The inductor coil is energized (at this time, the slider 92 is set on the second support arm 73), and the water pump in the water tank (not shown in the figure) generates current, so that the mining pipe model 60 is subjected to both pitch and ocean current, thereby simulating its vibration response under the combined action of pitch and vortex-induced vibration. This working condition can simulate the scenario where the vibration response of the mining pipe is large in actual engineering.

[0045] Vibration simulation under the combined action of heave and roll, or vibration simulation under the combined action of roll and simple sinusoidal oscillation: The control system controls the motor 30 to start and the inductor coil to be energized (at this time, the Scottish yoke mechanism 40 is set vertically on the side of the second support structure 12, the first connecting rod 71 is connected to the bottom end of the slide rod 41 located on the lower side, and the slider 92 is set on the first support arm 72), so that the mining pipe model 60 is simultaneously excited by heave motion and roll motion, thereby simulating its vibration response under the combined action of heave and roll, or simulating the vibration simulation under the combined action of roll and simple sinusoidal oscillation. This working condition can simulate the scenario where the vibration response of the mining pipe is large in actual engineering.

[0046] Vibration simulation under the combined action of sway and ocean current: The control system starts the motor 30 (at this time, the Scottish yoke mechanism 40 is set on the top of the first support structure 11 in the horizontal direction), and at the same time, the water pump in the water tank (not shown in the figure) generates current, so that the mining pipe model 60 is subjected to the combined action of sway and ocean current, thereby simulating its vibration response under the combined action of sway and vortex-induced vibration. This working condition can simulate the scenario where the vibration response of the mining pipe is large in actual engineering.

[0047] Vibration simulation under the combined action of heave-roll-vortex-induced vibration: Based on the above vibration simulation under the combined action of heave-roll, a water pump (not shown in the figure) in the water tank is used to generate current so that the mining pipe model 60 is simultaneously subjected to heave, roll and ocean current, thereby simulating its vibration response under the combined action of heave-roll-vortex-induced vibration. This working condition can simulate the scenario with the largest vibration response of mining pipe in actual engineering, and has important guiding significance for pipeline structure design and safety assessment of deep-sea mining engineering.

[0048] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A vibration analysis experimental system for mining pipelines under the combined effects of ship hull oscillation and ocean currents, characterized in that, include: Support device; A standard sinusoidal heave-swell system, or a roll-pitch system; The standard sinusoidal heave-swell system includes: A bracket is provided on the supporting device; The motor is mounted on the bracket; The Scottish yoke mechanism has its power input section connected to the motor drive and its power output section connected to the top of the mining pipe model via a tension gauge; the Scottish yoke mechanism is slidably connected to the support in the vertical direction; or, the Scottish yoke mechanism is slidably connected to the support in the horizontal direction. The roll-slide system is connected to the bottom of the support device; or, if the Scottish yoke is arranged vertically, the roll-slide system is connected to the power output of the Scottish yoke, and the mining pipe model is connected to the roll-slide system.

2. The vibration analysis experimental system for mining pipelines under the combined effects of ship hull oscillation and ocean currents as described in claim 1, characterized in that, The Scottish yoke mechanism includes: The slide bar has a first slide groove, and a guide rail is provided on one side of the slide bar. The guide rail is arranged along the length of the first slide groove and is slidably embedded in the first slide groove. A connecting part is connected to the end of the slide rod; the connecting part is provided with a sliding groove, and the length direction of the sliding groove is perpendicular to the sliding direction of the slide rod; The transmission arm has a first side connected to the motor for transmission, and a second side provided with a power output end. The power output end of the transmission arm is rotatably embedded in the sliding groove, thereby forming a groove mechanical connection with the sliding groove.

3. The vibration analysis experimental system for mining pipelines under the combined effects of ship hull oscillation and ocean currents as described in claim 2, characterized in that, The transmission arm includes: The rotating support arm has a first side connected to the motor drive and a second side provided with a second groove along the length of the slide rod; wherein the second side is opposite to the first side. The sliding knob assembly has one side embedded in the second sliding groove and the other side rotatably embedded in the sliding groove opening.

4. The vibration analysis experimental system for mining pipelines under the combined effects of ship hull oscillation and ocean currents as described in claim 3, characterized in that, The sliding knob assembly includes: The sliding part is cubic in shape and is embedded in the second sliding groove, and is fixed in a preset position by fasteners; The rotating part, which is cylindrical, is connected to the sliding part and is rotatably embedded in the sliding groove.

5. The vibration analysis experimental system for mining pipelines under the combined effects of ship hull oscillation and ocean currents as described in claim 1, characterized in that, Also includes: A fixed support is provided, through which the top of the mining pipe model is connected to the tension gauge.

6. The vibration analysis experimental system for mining pipelines under the combined effects of ship hull oscillation and ocean currents as described in claim 1, characterized in that, The support device includes: The first support structure, wherein the Scottish yoke mechanism arranged in a horizontal direction is installed on the top of the first support structure; wherein the bottom of the first support structure is fixed to the top of the water tank; The second support structure is detachably connected to the top of the first support structure, and the Scottish yoke mechanism, which is arranged vertically, is installed on the side of the second support structure.

7. The vibration analysis experimental system for mining pipelines under the combined effects of ship hull oscillation and ocean currents according to any one of claims 1 to 6, characterized in that, The roll-pitch system includes: The first connecting rod is connected to the bottom of the support device or the power output part of the Scottish yoke mechanism; A magnet guide arm, connected to the first connecting rod, is used to provide different guiding directions; The floating platform is hinged at the top to the bottom of the magnet guide arm, connected at the bottom to the top of the mining pipe model via a tension gauge, and slidably connected to the magnet guide arm via a second connecting rod on the side. An inductor coil is provided at the second end of the second connecting rod. When the inductor coil is energized, the second end of the second connecting rod reciprocates along the magnet guide arm, thereby driving the mining pipe model to perform lateral or longitudinal movements.

8. The vibration analysis experimental system for mining pipelines under the combined effects of ship hull oscillation and ocean currents as described in claim 7, characterized in that, The magnet guide arm includes: The first arm, which has evenly distributed magnets, is horizontally positioned and its first end is connected to the side of the first connecting rod. The second arm, which has evenly distributed magnets, is horizontally positioned and its first end is connected to the side of the first connecting rod. Furthermore, the first arm and the second arm are perpendicular to each other on the horizontal plane.

9. The vibration analysis experimental system for mining pipelines under the combined effects of ship hull oscillation and ocean currents as described in claim 8, characterized in that, The second connecting rod includes: The first end of the rod is hinged to the side of the floating platform; The slider has the inductor coil wound on its surface, its bottom is hinged to the second end of the rod, and the slider has a through hole in the horizontal direction; The first arm passes through the through hole, so that the slider slides back and forth along the first arm under electromagnetic drive, thereby causing the mining pipe model to perform periodic lateral rolling motion; or, the second arm passes through the through hole, so that the slider slides back and forth along the second arm under electromagnetic drive, thereby causing the mining pipe model to perform periodic longitudinal rolling motion.

10. The vibration analysis experimental system for mining pipelines under the combined effects of ship hull oscillation and ocean currents according to any one of claims 1 to 6, characterized in that, Also includes: An image acquisition module, located outside the water tank, is used to acquire images of the IL and CF surfaces of the mining pipe model.

Images