Device and method for indoor simulation and fixing of sea conditions for slender strip-shaped components on the seabed

Abstract

The present invention discloses an indoor sea condition simulation fixing device and method for a slender strip-shaped submarine component. The indoor sea condition simulation fixing device includes a component fixing assembly and a position adjustment support, a mounting platform is provided on the position adjustment support, and the component fixing assembly is installed on the mounting platform; the slender strip-shaped submarine component can be clamped by the component fixing assembly. The component fixing assembly includes a fixing plate, a force measuring spring and a component clamp assembly; the component clamp assembly includes a tightening member and an arc-shaped friction plate; there are at least two arc-shaped friction plates, each arc-shaped friction plate is evenly distributed and can be enclosed to form a component clamp assembly, and at the same time, a tightening member is installed at the middle position of each arc-shaped friction plate. It can be seen that the present invention can freely adjust the degree of freedom and force of the two ends of the slender strip-shaped submarine component to overcome the problem that the fixing method of the two ends of the slender strip-shaped submarine component is difficult to truly simulate the actual forced motion vibration.

Description

Technical Field

[0001] The invention relates to a device and method for fixing a sea condition indoor simulation of a seabed slender strip-shaped component. Background Art

[0002] Slender, rigid or flexible submarine structures are common man-made marine structures. Typical examples include flexible submarine optical cables and rigid submarine oil and gas pipelines. Due to the complex seabed topography and wide coverage of the sea areas where they are laid, they often face extremely complex and changeable sea conditions, which poses significant challenges to their safety and maintenance. Examples include the Sino-US trans-Pacific submarine optical cable, which even spans the entire Pacific Ocean; and the Nord Stream natural gas pipeline from Russia to Germany, which spans over 1,000 kilometers across the Baltic Sea.

[0003] Given the complex and ever-changing scenarios faced by these slender, flexible, or rigid components, as well as the significant investment and complex construction process involved, extensive early-stage laboratory testing is often required to demonstrate their feasibility and reliability. Typically, the stress-induced vibration of these subsea slender components is a key cause of component damage. Therefore, full-scale simulation of subsea sea conditions and subsea slender components is necessary to observe and examine the oscillation damage process of these components.

[0004] However, in indoor simulation tests, whether the fixing method of the two ends of the slender strip components on the seabed can fully reflect the force and vibration movement of the slender strip components on the seabed under actual sea conditions is an important prerequisite for ensuring the accuracy of the test results. Summary of the Invention

[0005] The purpose of the present invention is to provide an indoor simulation and fixing device for sea conditions of slender strip-shaped submarine components and a method thereof, which overcomes the problem that the fixing method at both ends of the slender strip-shaped submarine components is difficult to truly simulate actual forced motion vibration.

[0006] In order to achieve the above technical objectives, the present invention will adopt the following technical solutions:

[0007] A device for indoor simulation and fixing of sea conditions for a thin and long strip-shaped submarine component, comprising a component fixing assembly and a position adjustment support, wherein:

[0008] The position adjustment support is provided with a mounting platform; the component fixing assembly is installed on the mounting platform; the seabed elongated strip component can be clamped by the component fixing assembly;

[0009] The component fixing assembly includes a fixing plate, a force measuring spring and a component clamp assembly;

[0010] A circular cavity is provided at the middle of the fixing plate;

[0011] The component clamp assembly is arranged in the circular cavity, and the component clamp assembly is connected to the cavity wall of the circular cavity through a plurality of uniformly distributed force measuring springs;

[0012] The component clamp assembly includes a tightening component and an arc-shaped friction plate; there are at least two arc-shaped friction plates, each of which is evenly distributed and can be enclosed to form a component clamp assembly, and there is a gap between two adjacent arc-shaped friction plates that meets engineering needs. At the same time, the middle position of each arc-shaped friction plate is equipped with a tightening component that can lock the arc-shaped friction plate and the slender strip component on the seabed placed in the component clamp assembly.

[0013] Preferably, the position adjustment support is a cross sliding device.

[0014] Preferably, the cross sliding device includes a transverse sliding plate and a vertical sliding plate; wherein:

[0015] One side of the mounting platform is mounted on the horizontal chute plate in a detachable manner, and the other side is also connected to the vertical chute plate in a detachable manner;

[0016] When the connection between the mounting platform and the horizontal chute plate is released, the horizontal chute plate can freely move laterally relative to the vertical chute plate through the mounting platform until it reaches the target position, and then the connection between the mounting platform and the vertical chute plate is locked;

[0017] When the connection between the mounting platform and the vertical slide plate is released, the vertical slide plate can freely move vertically relative to the horizontal slide plate through the mounting platform until it reaches the target position, and then the connection between the mounting platform and the horizontal slide plate is locked.

[0018] Preferably, the mounting platform is a raised wheel rail; the raised wheel rail is a hollow structure, and the outer wing surface of the raised wheel rail is nested and clamped with the vertical slide plate, while the other side of the raised wheel rail opposite to the outer wing surface is connected to the horizontal slide plate;

[0019] The component fixing assembly is assembled in the hollow structure of the raised wheel rail, and the fixing plate is provided with connecting bolts to be connected with the raised wheel rail into one body.

[0020] Preferably, the horizontal slide plate and the vertical slide plate are both provided with a number of screw holes along their length extension direction; there are four through bolt holes between the raised wheel rail and the horizontal slide plate and the vertical slide plate, which are locked one by one by fixing bolts; the outer wing surface of the raised wheel rail is vertically positioned by two fixing bolts on the same side.

[0021] Preferably, the horizontal slide plate and the vertical slide plate are both plate-shaped slotted structures made of steel material, meeting the following requirements: thickness between 1 and 2 cm, width ≥ 25 cm, and slide groove width ≥ 18 cm; bolt holes are evenly spaced on both sides of the slide groove of the horizontal slide plate and the vertical slide plate, and the diameter of the bolt holes is ≈ 0.7 cm and the hole spacing is ≈ 2 cm.

[0022] Preferably, the tightening member is a special-shaped bolt.

[0023] Preferably, there are two arc-shaped friction plates;

[0024] Each arc-shaped friction plate is equipped with an even number of force-measuring springs; and for each arc-shaped friction plate, the force-measuring springs are symmetrically distributed relative to the position of the tightening member.

[0025] Another technical purpose of the present invention is to provide a method for indoor simulation of sea conditions of submarine slender strip components, which is based on the above-mentioned indoor simulation fixture for sea conditions of submarine slender strip components and includes:

[0026] Step 1: Assembly:

[0027] One end of the seabed slender strip component is clamped and fixed by a sea condition indoor simulation fixture, and the other end is connected to the tension device;

[0028] Step 2: Calculate the tension applied by the tension device:

[0029] F=Vρg;

[0030] Where: V is the volume of the weight in the pulling device; ρ is the density of the weight in the pulling device; g is the acceleration due to gravity of the earth;

[0031] Step 3: Calculate the forces and moments borne by the fixed ends of the slender strip-shaped components on the seabed:

[0032]

[0033] Where: F is the total force borne by the fixed end of the slender strip-shaped component on the seabed; n is the total number of force-measuring springs in the indoor sea state simulation fixture; i represents the i-th force-measuring spring; is the force vector value of the i-th force-measuring spring; M is the sum of the moments borne by the fixed end of the slender strip-shaped structure on the seabed; L i is the acting torque of the i-th force-measuring spring.

[0034] Based on the above technical objectives, the present invention has the following advantages over the prior art:

[0035] 1. The present invention fully considers the force and vibration movement modes of the slender strip-shaped submarine components under actual sea conditions and develops a component fixing assembly for fixing the slender strip-shaped submarine components. The clamping part of the component fixing assembly is configured as a split component and equipped with a force-measuring spring, thus having the advantages of freedom and adjustable force. It can more realistically simulate the forced movement and vibration of the slender strip-shaped submarine components, thereby providing a guarantee for the accuracy of the test results.

[0036] 2. The indoor sea condition simulation fixture of the present invention further provides a position adjustment support to load the component fixing assembly through the position adjustment support, thereby facilitating adjustment of the test position and orientation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic structural diagram of the device for indoor simulation and fixing of sea conditions for a slender strip-shaped submarine component according to the present invention;

[0038] Figure 2 yes Figure 1 Structural diagram of the middle member fixing assembly;

[0039] Figure 3 yes Figure 1 Schematic diagram of the structure of the mid-position adjustment support;

[0040] Figure 4 yes Figure 1 Structural diagram of the middle mounting platform;

[0041] Figure 5 This is a schematic diagram of a structure for simulating the stress of a slender strip-shaped component on the seabed using the indoor sea condition simulation fixture of the present invention;

[0042] In the figure: 1. Position adjustment support; 11. Vertical slide plate; 12. Horizontal slide plate; 13. Adjustment hole; 14. Fixing bolt; 2. Component fixing assembly; 21. Fixing plate; 22. Arc-shaped friction plate; 23. Force measuring spring; 24. Special-shaped bolt; 25. Connecting bolt; 26. Mounting platform; 3. Slender strip-shaped component on the seabed; 4. Tension device; 41. Tension device chassis; 42. Tension device bracket; 43. Weight; 44. Rotatable pulley; 45. Pull rope; 46. Ring fastener. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way serves as any limitation on the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention. Unless otherwise specified, the relative arrangement of components and steps, expressions and numerical values ​​described in these embodiments do not limit the scope of the present invention. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered part of the specification. In all examples shown and discussed here, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values.

[0044] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations).

[0045] like Figure 1-5 As shown, the indoor simulation and fixing device for sea conditions of the slender strip-shaped submarine components described in the present invention includes a component fixing assembly and a position adjustment support, and a mounting platform is provided on the position adjustment support; the component fixing assembly is installed on the mounting platform; the slender strip-shaped submarine components can be clamped by the component fixing assembly.

[0046] Specifically, the component fixing assembly of the present invention is as follows: Figure 2As shown, the structure comprises a fixing plate, a force-measuring spring, and a component clamp assembly. A circular cavity is provided in the middle of the fixing plate, forming a frame-shaped fixing plate. The component clamp assembly is arranged in the circular cavity, and the component clamp assembly is connected to the cavity wall of the circular cavity via a number of evenly distributed force-measuring springs. The force-measuring springs can display the tensile or compressive force during the test. The force-measuring springs are connected to the component clamp assembly and the cavity wall of the circular cavity by hinged connections. The component clamp assembly includes a clamping member and an arcuate friction plate. There are at least two arcuate friction plates. In the accompanying drawings, there are two arcuate friction plates, symmetrically distributed up and down. Of course, the number of arcuate friction plates can also be selected. The arcuate friction plates are evenly distributed and can enclose the component clamp assembly. There is a gap between adjacent arcuate friction plates to meet engineering requirements. At the same time, a clamping member is installed in the middle of each arcuate friction plate to lock the arcuate friction plate to the elongated submarine component placed in the component clamp assembly. The clamping member uses a special-shaped bolt. It can be seen that in the present invention, the component clamp assembly is configured as a split component, and the component clamp assembly is connected to the circular cavity through evenly distributed force measuring springs, so that on the one hand, it can ensure that the component clamp assembly is adapted to the seabed slender strip components of different radius sizes; on the other hand, through the configured force measuring springs, it can ensure that the seabed slender strip components have the advantages of freedom and adjustable force.

[0047] Depending on the strength of the test subsea slender strip and the potential stresses during testing, the force-measuring springs can be replaced to meet test requirements. Furthermore, to accommodate uneven forces in different directions during testing, force-measuring springs in different locations can be replaced and debugged with force-measuring components of different types and force ranges. The inner edge of the arc-shaped friction plate directly contacts the test subsea slender strip, secured to the structure by special-shaped bolts. To ensure the relative micro-displacement requirements during testing, the inner diameter of the arc-shaped friction plate must be 1.00 to 1.05 times the diameter or size of the subsea slender strip.

[0048] Furthermore, in the present invention, each arcuate friction plate is equipped with an even number of force-measuring springs. For each arcuate friction plate, the force-measuring springs are symmetrically distributed relative to the location of the tensioning member. In the accompanying drawings, there are four force-measuring springs, two of which are symmetrically distributed on either side of the tensioning member. Of course, each arcuate friction plate can be equipped with four or six force-measuring springs, and this specific number does not limit the present invention.

[0049] The position adjustment support described in the present invention is a cross sliding device, such as Figure 3As shown, the cross-sliding device includes a horizontal slide plate and a vertical slide plate; one side of the mounting platform is mounted on the horizontal slide plate by a detachable connection, and the other side is also connected to the vertical slide plate by a detachable connection; when the connection between the mounting platform and the horizontal slide plate is released, the horizontal slide plate can freely move laterally relative to the vertical slide plate through the mounting platform until it reaches the target position, and then the connection between the mounting platform and the vertical slide plate is locked; when the connection between the mounting platform and the vertical slide plate is released, the vertical slide plate can freely move vertically relative to the horizontal slide plate through the mounting platform until it reaches the target position, and then the connection between the mounting platform and the horizontal slide plate is locked. Wherein:

[0050] The mounting platform is a raised wheel rail, such as Figure 4 As shown, the raised wheel rail is a hollow structure, and the outer wing surface of the raised wheel rail is nested and clamped with the vertical slide plate to prevent relative displacement between the raised wheel rail and the vertical slide plate. The other side of the raised wheel rail opposite the outer wing surface is connected to the transverse slide plate. The component fixing assembly is assembled in the hollow structure of the raised wheel rail, and the fixing plate is provided with connecting bolts to connect it to the raised wheel rail as a whole. The size of the component fixing assembly can be adjusted and replaced according to the size of the slender strip-shaped components on the seabed, but its size must meet 0.80 to 0.95 times the hollow structure of the raised wheel rail to meet the locking requirements of sufficient strength.

[0051] Both the horizontal and vertical chute plates have screw holes distributed along their lengths. Four bolt holes extend between the raised wheel rail and the horizontal and vertical chute plates, each secured with a set screw. The outer wing of the raised wheel rail is vertically positioned by two set screws on the same side. Both the horizontal and vertical chute plates are slotted steel plates with a thickness of 1-2 cm, a width of ≥25 cm, and a chute width of ≥18 cm. Bolt holes are evenly spaced on both sides of the chute, with a diameter of ≈0.7 cm and a spacing of ≈2 cm.

[0052] Based on the above-mentioned indoor sea condition simulation fixture for submarine slender strip-shaped components, the present invention further provides an indoor sea condition simulation method for submarine slender strip-shaped components, comprising:

[0053] Step 1: Assembly:

[0054] One end of the seabed slender strip component (for testing) is clamped and fixed by a sea condition indoor simulation fixture, and the other end is connected to the tension device;

[0055] like Figure 5As shown, the tensioning device includes an annular fixing device, a tensioning rope, a rotatable pulley, a tensioning device bracket, a weight and a tensioning device chassis. The annular fixing device is tightly connected to one end of the slender strip-shaped structure on the seabed, and the annular fixing device is connected to the tensioning rope. At the same time, the tensioning rope is connected to the weight through the rotatable pulley. The weight can be adjusted according to the type, size and mass of the weight according to the need of tension. The rotatable pulley is installed at the top of the tensioning device bracket, and the tensioning device bracket is adjusted according to the mass of the weight. The number of tensioning device brackets can be adjusted between 3 and 8. The tensioning device bracket is located on the tensioning device base, and the two are fixed to each other, and the mass of the tensioning device base is required to be able to maintain a horizontal state under different weight conditions.

[0056] Attachment Figure 1 In the process, both ends of the slender strip-shaped component on the seabed are clamped and fixed by a sea condition indoor simulation fixture.

[0057] Attachment Figure 5 In the figure, only one end of the slender strip-shaped component on the seabed is shown to be clamped and fixed by the indoor sea condition simulation fixture, while the other end is omitted, and the structure of the tension device is unfolded in detail.

[0058] Step 2: Calculate the tension applied by the tension device:

[0059] F=Vρg;

[0060] Where: V is the volume of the weight in the pulling device; ρ is the density of the weight in the pulling device; g is the acceleration due to gravity of the earth;

[0061] Step 3: Calculate the forces and moments borne by the fixed ends of the slender strip-shaped components on the seabed:

[0062]

[0063] Where: F is the total force borne by the fixed end of the slender strip-shaped component on the seabed; n is the total number of force-measuring springs in the indoor sea state simulation fixture; i represents the i-th force-measuring spring; is the force vector value of the i-th force-measuring spring; M is the sum of the moments borne by the fixed end of the slender strip-shaped structure on the seabed; L i is the acting torque of the i-th force-measuring spring.

Claims

1. A device for indoor simulation and fixing of sea conditions of slender strip-shaped components on the seabed, characterized in that: It includes a component fixing assembly and a position adjustment support, wherein: The position adjustment support is provided with a mounting platform; the component fixing assembly is installed on the mounting platform; the seabed elongated strip component can be clamped by the component fixing assembly; The component fixing assembly includes a fixing plate, a force measuring spring and a component clamp assembly; A circular cavity is provided at the middle of the fixing plate; The component clamp assembly is arranged in the circular cavity, and the component clamp assembly is connected to the cavity wall of the circular cavity through a plurality of uniformly distributed force measuring springs; The component clamp assembly includes a tightening member and an arcuate friction plate; there are at least two arcuate friction plates, each of which is evenly distributed and can enclose a component clamp assembly, and there is a gap between two adjacent arcuate friction plates to meet engineering requirements. At the same time, a tightening member is installed in the middle of each arcuate friction plate to lock the arcuate friction plate with the submarine slender strip component placed in the component clamp assembly; The tightening member is a special-shaped bolt; There are two arc-shaped friction plates in total, and each arc-shaped friction plate is equipped with an even number of force measuring springs; for each arc-shaped friction plate, the force measuring springs are symmetrically distributed relative to the position of the tightening component, and the connection between the force measuring springs and the component clamp assembly and the cavity wall of the circular cavity is hinged.

2. The indoor sea condition simulation fixture for the seabed elongated strip-shaped member according to claim 1 is characterized in that: The position adjustment support is a cross sliding device.

3. The indoor sea condition simulation fixture for the seabed elongated strip-shaped member according to claim 2, characterized in that: The cross sliding device includes a horizontal slide plate and a vertical slide plate; wherein: One side of the mounting platform is mounted on the horizontal chute plate in a detachable manner, and the other side is also connected to the vertical chute plate in a detachable manner; When the connection between the mounting platform and the horizontal chute plate is released, the horizontal chute plate can freely move laterally relative to the vertical chute plate through the mounting platform until it reaches the target position, and then the connection between the mounting platform and the vertical chute plate is locked; When the connection between the mounting platform and the vertical slide plate is released, the vertical slide plate can freely move vertically relative to the horizontal slide plate through the mounting platform until it reaches the target position, and then the connection between the mounting platform and the horizontal slide plate is locked.

4. The indoor sea condition simulation fixture for the seabed elongated strip-shaped member according to claim 3 is characterized in that: The mounting platform is a raised wheel rail; the raised wheel rail is a hollow structure, and the outer wing surface of the raised wheel rail is nested and clamped with the vertical slide plate, while the other side of the raised wheel rail opposite to the outer wing surface is connected to the horizontal slide plate; The component fixing assembly is assembled in the hollow structure of the raised wheel rail, and the fixing plate is provided with connecting bolts to be connected with the raised wheel rail into one body.

5. The indoor sea condition simulation fixture for the seabed elongated strip-shaped member according to claim 3, characterized in that: The horizontal slide plate and the vertical slide plate are both provided with a number of screw holes along their length extension direction; there are four through bolt holes between the raised wheel rail and the horizontal slide plate and the vertical slide plate, which are locked one by one by fixing bolts; the outer wing surface of the raised wheel rail is vertically positioned by two fixing bolts on the same side.

6. The indoor sea condition simulation fixture for seabed elongated strip-shaped components according to claim 5, characterized in that: The horizontal slide plate and the vertical slide plate are both plate-shaped slotted structures made of steel material, meeting the following requirements: thickness between 1~2cm, width ≥25cm, and slide groove width ≥18cm; bolt holes are evenly spaced on both sides of the slide groove of the horizontal slide plate and the vertical slide plate, and the diameter of the bolt holes is ≈0.7cm and the hole spacing is ≈2cm.

7. A method for indoor simulation of sea conditions of a submarine slender strip member, based on the indoor simulation fixture for sea conditions of a submarine slender strip member according to claim 1, characterized in that: include: Step 1: Assembly: One end of the seabed slender strip component is clamped and fixed by a sea condition indoor simulation fixture, and the other end is connected to the tension device; Step 2: Calculate the tension applied by the tension device: ； Where: V is the volume of the weight in the tension device; is the density of the weight in the pulling device; g is the acceleration due to gravity of the earth; Step 3: Calculate the forces and moments borne by the fixed ends of the slender strip-shaped components on the seabed: ； ； Where: It is the sum of the forces borne by the fixed ends of the slender strip-shaped components on the seabed; n is the total number of force-measuring springs in the indoor sea state simulation fixture; i Representative i A force-measuring spring; For the i The force vector value of the force-measuring spring; M is the sum of the moments borne by the fixed end of the slender strip-shaped component on the seabed; For the i The torque of a force-measuring spring.

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