CN115901177A - Cylindrical FPSO platform vortex-induced motion water tank experimental device - Google Patents
Cylindrical FPSO platform vortex-induced motion water tank experimental device Download PDFInfo
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- CN115901177A CN115901177A CN202211674631.2A CN202211674631A CN115901177A CN 115901177 A CN115901177 A CN 115901177A CN 202211674631 A CN202211674631 A CN 202211674631A CN 115901177 A CN115901177 A CN 115901177A
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Abstract
The invention provides a cylindrical FPSO platform vortex-induced motion water tank experimental device relating to the technical field of ocean platform experimental devices, which comprises a cylindrical FPSO platform model, an integral supporting mechanism, a horizontal sliding mechanism, an airflow generating mechanism, a horizontal mooring mechanism and a yawing adjusting mechanism, wherein the cylindrical FPSO platform model is connected with the airflow generating mechanism and the horizontal sliding mechanism through the yawing adjusting mechanism, the horizontal sliding mechanism is transversely arranged above a water tank through the integral supporting mechanism, the integral supporting mechanism is fixed at the top of the water tank and is used for immersing the cylindrical FPSO platform model in water, the horizontal mooring mechanism is connected with the horizontal sliding mechanism, one end of the yawing adjusting mechanism is connected with the horizontal sliding mechanism, and the other end of the yawing adjusting mechanism is connected with the cylindrical FPSO platform model. The device can simulate the vortex-induced motion of the cylindrical FPSO platform in a real stress environment, is convenient to set a mechanism for researching the influence of the yawing freedom on the vortex-induced motion by a contrast experiment, and has the advantages of simple structure and convenience in operation.
Description
Technical Field
The invention relates to the technical field of ocean platform experiment devices, in particular to a cylindrical FPSO platform vortex-induced motion water tank experiment device.
Background
Floating Production Storage Offloading (FPSO) is an important piece of equipment for the development of marine oil and gas fields. The structural style of traditional FPSO is mostly ship type FPSO, adopts single point mooring system to be fixed a position in operation sea area. The ship-type FPSO has the characteristics of sensitivity to environmental conditions, poor motion performance (particularly heave motion performance), high cost of a matched mooring system and the like. In recent years, cylindrical FPSOs, as a new ocean engineering device, have multiple functions of oil and gas production and treatment, oil storage, export, living and the like, and are gradually applied to the development of global ocean oil and gas resources. The motion characteristic of the cylindrical FPSO is superior to that of a ship-type FPSO, and the multi-point mooring system is adopted for positioning, so that the construction cost is greatly reduced. Cylindrical FPSOs and other ocean platforms can produce vortex-induced motion in ocean current backgrounds, causing fatigue damage to the riser and mooring system. At present, related researches on cylindrical FPSOs are few, and the design and construction of a structure with good motion performance are not facilitated. The model test is an important research method in the field of ocean engineering, and has important significance in understanding hydrodynamic performance of ocean structures. And the accurate simulation of the stress condition of the real platform in the marine environment is the key for improving the reliability of experimental data.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a cylindrical FPSO platform vortex-induced motion water tank experimental device which can accurately simulate the vortex-induced motion condition of an ocean platform in a real stress environment.
The invention provides a cylindrical FPSO platform vortex-induced motion water tank experimental device which comprises a cylindrical FPSO platform model, an integral supporting mechanism, a horizontal sliding mechanism, an airflow generating mechanism, a horizontal mooring mechanism and a yawing adjusting mechanism.
Preferably, the airflow generating mechanism is embedded in a sliding block of the horizontal sliding mechanism.
Preferably, the yawing adjusting mechanism is installed on a central shaft of the cylindrical FPSO platform model, and the yawing adjusting mechanism is connected with a sliding block of the horizontal sliding mechanism.
Preferably, the cylindrical FPSO platform model comprises a cylindrical FPSO platform model body, a central pillar and a support rod, wherein the inner bottom of the cylindrical FPSO platform model body is coaxially connected with the bottom of a disc of the central pillar, and the support rod is symmetrically connected with the cylindrical FPSO platform model body and the central pillar.
Preferably, the integral supporting mechanism comprises a cross beam, beam materials and supporting beams, the cross beam is connected to the top of the water tank, the beam materials are vertically connected to two sides of the cross beam, the supporting beams are connected between the beam materials and distributed along the flow direction of the water tank, and the supporting beams are connected with the horizontal sliding mechanism.
Preferably, the horizontal sliding mechanism comprises a sliding block and a linear rail, wherein the sliding block slides on the linear rail to drive the cylindrical FPSO platform model to perform vortex-induced motion along the linear guide rail;
the sliding block is provided with a small hole which is connected with an air bearing in the airflow generation mechanism.
Preferably, the airflow generation mechanism comprises an air compressor, a compressed air guide pipe and an air bearing, the air bearing is connected with a sliding block, the air bearing is connected with an external air compressor through the compressed air guide pipe, and an airflow gap is formed between the air bearing and the plane of the linear guide rail during operation.
Preferably, the horizontal mooring mechanism comprises a tension spring and a tension sensor, one end of the tension spring is connected with the sliding block, the other end of the tension spring is connected with the tension sensor, the tension sensor is connected with the linear track, the surfaces of the tension spring and the linear track are kept parallel, and the numerical value of the tension sensor is subjected to post-processing to obtain the displacement response of the cylindrical FPSO platform model.
Preferably, yaw adjustment mechanism includes spacing pin, antifriction bearing, the snap ring, linear spring and no elastic connection rope, spacing pin inserts restriction yaw degree of freedom on the slider through the trompil of central pillar, release yaw degree of freedom when spacing pin extracts, antifriction bearing is fixed in on the slider of both sides through the snap ring, the central pillar of drum type FPSO platform model hangs in the basin top through antifriction bearing's axle center, linear spring one end is connected on the slider, no elastic connection rope is connected to the linear spring other end, no elastic connection rope connects central pillar, linear spring, no elastic connection rope and slider surface keep parallel.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the friction between the sliding block and the linear track can be reduced through the air gap between the air bearing and the sliding block, so that the platform is hardly subjected to the lateral force from the integral supporting device on the premise of not limiting the horizontal movement of the platform model, the vortex-induced motion of the cylindrical FPSO platform in a real stress environment is accurately simulated, and the reliability of experimental data is improved; the yaw freedom degree is conveniently limited or released, and the research on the influence of the yaw freedom degree on vortex-induced motion is conveniently carried out; the whole experimental device has simple structure and convenient operation.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a cylindrical FPSO platform model and a yaw adjustment mechanism according to the present invention;
fig. 3 is a schematic view of the horizontal sliding mechanism and the horizontal mooring mechanism of the present invention.
Reference numbers in the figures:
the device comprises a cylindrical FPSO platform model 1, a cylindrical FPSO platform model body 11, a central strut 12, a support rod 13, an integral support mechanism 2, a cross beam 21, a beam material 22, a support beam 23, a horizontal sliding mechanism 3, a slide block 31, a linear track 32, an airflow generating mechanism 4, an air bearing 41, a horizontal mooring mechanism 5, a tension spring 51, a tension sensor 52, a yawing adjusting mechanism 6, a limit pin 61, a rolling bearing 62, a snap ring 63, a linear spring 64 and an inelastic connecting rope 65.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will aid those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any manner. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the invention.
Examples
The invention provides a cylindrical FPSO platform vortex-induced motion water tank experimental device which comprises a cylindrical FPSO platform model 1, an integral supporting mechanism 2, a horizontal sliding mechanism 3, an airflow generating mechanism 4, a horizontal mooring mechanism 5 and a yawing adjusting mechanism 6, wherein the cylindrical FPSO platform model is shown in figures 1-3; the cylindrical FPSO platform model 1 is connected with a horizontal sliding mechanism 3, transversely erected above a water tank through an integral supporting mechanism 2 and immersed in water to a proper depth; the integral supporting mechanism 2 is fixed on the top of the water tank; the horizontal sliding mechanism 3 is connected with the integral supporting mechanism 2; the airflow generating mechanism 4 is embedded in the sliding block 31 of the horizontal sliding mechanism 3 and is connected with an external air compressor through a compressed air guide pipe; one end of the horizontal mooring mechanism 3 is connected with the cylindrical FPSO platform model 1, and the other end is connected with the integral supporting mechanism 2; the yawing adjusting mechanism 6 is installed on the central shaft 12 of the cylindrical FPSO platform model and connected with the slide block 31 of the horizontal sliding mechanism 3.
The cylindrical FPSO platform model 1 comprises a cylindrical FPSO platform model body 11, a central strut 12 and a support rod 13; the inner bottom of the cylindrical FPSO platform model body 11 is coaxially connected with the bottom of a disc of the center pillar 12; the central pillar 12 is provided with a horizontal hole at a position close to the sliding block 31 for inserting a limit pin 61; a plurality of support rods 13 are radially and symmetrically distributed between the cylindrical FPSO platform model body 11 and the central support 12, one end of each support rod 13 is connected with the central support 12, and the other end of each support rod 13 is connected with the inner wall of the cylindrical FPSO platform model body 11, so that the cylindrical FPSO platform model 1 is supported, and the side inclination in the motion process is prevented.
The integral supporting mechanism 2 is of a truss structure, is fixed at the top of the water tank through two cross beams 21 in the truss, is welded on four beam materials 22 on the cross beams and is perpendicular to the water surface, a supporting beam 23 is connected between the two vertical beam materials 22 on one side along the flowing direction of the water tank and is used for supporting the horizontal sliding mechanism 3, and the cylindrical FPSO platform model 1 is immersed in the water to a proper depth by adjusting the connecting height of the supporting beam 23.
The horizontal sliding mechanism 3 consists of a sliding block 31 and a linear track 32, so that the cylindrical FPSO platform model 1 performs vortex-induced motion along the linear track 32 in a horizontal plane; the slider 31 is opened at four sides thereof for mounting the air bearing 41. The airflow generation mechanism 4 consists of an air compressor, a compressed air guide pipe and an air bearing 41 and is used for reducing the friction between the cylindrical FPSO platform model 1 and the integral supporting mechanism 2 in the motion process; the air bearing 41 is connected with the slide block 31 through a bolt and a clamping nut, and a small gap is kept between the air bearing 41 and the linear track 32; the air bearing 41 is connected with an external air compressor through a compressed air duct, and an air flow gap is formed between the air bearing 41 and the plane of the linear rail 32 during operation, so that friction generated by direct contact between the slider 31 and the linear rail 32 is avoided.
The horizontal mooring mechanism 5 consists of a tension spring 51 and a tension sensor 52 and provides required horizontal rigidity and restoring force for the cylindrical FPSO platform model 1; one end of a tension spring 51 is connected with the slide block 31, the other end of the tension spring is connected with the tail end of the linear track 32 after being connected with a tension sensor 52, and the tension spring 51 is parallel to the surface of the linear track 32; the value of the tension sensor 52 can be post-processed to obtain the displacement response of the cylindrical FPSO platform model 1.
The yawing adjusting mechanism 6 comprises a limiting pin 61, a rolling bearing 62, a clamping ring 63, a linear spring 64 and an inelastic connecting rope 65, can limit or release yawing freedom, and is convenient to research influence of yawing motion; the limit pin 61 is inserted into the opening at one side of the slide block 31 through the opening of the central pillar 12, so that the yawing freedom degree is limited, and the yawing freedom degree can be released by pulling out the limit pin 61; the rolling bearing 62 is fixed on the sliding blocks 31 at two sides through a clamping ring 63, and the central support 12 of the cylindrical FPSO platform model 1 is suspended above the water tank through the axis of the rolling bearing 62; one end of the linear spring 64 is connected to the sliding block 31, the other end of the linear spring 64 is connected with the inelastic connecting rope 65, the other end of the inelastic connecting rope 65 is tied to the central pillar 12, the linear spring 64 and the inelastic connecting rope 65 are kept parallel to the surface of the sliding block 31, and the yaw stiffness of the cylindrical FPSO platform model 1 can be changed by replacing the linear spring 64, so that the yaw stiffness is linearly controllable.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (9)
1. The utility model provides a drum type FPSO platform vortex-induced motion basin experimental apparatus, a serial communication port, including drum type FPSO platform model (1), whole supporting mechanism (2), horizontal sliding mechanism (3), air current generation mechanism (4), horizontal mooring mechanism (5) and yawing adjustment mechanism (6), drum type FPSO platform model (1) passes through yawing adjustment mechanism (6) with air current generation mechanism (4) reaches horizontal sliding mechanism (3) link to each other, horizontal sliding mechanism (3) pass through whole supporting mechanism (2) roll frame in the basin top, whole supporting mechanism (2) are fixed in the basin top, will drum type FPSO platform model (1) soaks in aqueous, be connected with on drum type FPSO platform model (1) yawing adjustment mechanism (6), yawing adjustment mechanism (6) one end is connected horizontal sliding mechanism (3), yawing adjustment mechanism (6) other end is connected drum type FPSO platform model (1).
2. The vortex-induced motion flume experiment device for the cylindrical FPSO platform according to claim 1, wherein the airflow generating mechanism (4) is embedded in a slide block (31) of the horizontal sliding mechanism (3).
3. The vortex-induced motion flume experiment device for the cylindrical FPSO platform according to claim 1, wherein the pitching adjusting mechanism (6) is installed on a central shaft (12) of the cylindrical FPSO platform model (1), and the pitching adjusting mechanism (6) is connected with a sliding block (31) of the horizontal sliding mechanism (3).
4. The vortex-induced motion flume experiment device for the cylindrical FPSO platform according to claim 3, wherein the cylindrical FPSO platform model (1) comprises a cylindrical FPSO platform model body (11), a central pillar (12) and a support rod (13), the inner bottom of the cylindrical FPSO platform model body (11) is coaxially connected with the disc bottom of the central pillar (12), and the support rod (13) symmetrically connects the cylindrical FPSO platform model body (11) and the central pillar (12).
5. The vortex-induced motion water tank experimental device for the cylindrical FPSO platform according to claim 1, wherein the integral supporting mechanism (2) comprises a cross beam (21), beam members (22) and supporting beams (23), the cross beam (21) is connected to the top of the water tank, the beam members (22) are vertically connected to two sides of the cross beam (21), the supporting beams (23) are connected between the beam members (22), the supporting beams (23) are distributed along the flow direction of the water tank, and the supporting beams (23) are connected with the horizontal sliding mechanism (3).
6. The vortex-induced motion water tank experimental device for the cylindrical FPSO platform is characterized in that the horizontal sliding mechanism (3) comprises a sliding block (31) and a linear rail (32), the sliding block (31) slides on the linear rail (32) to drive the cylindrical FPSO platform model (1) to perform vortex-induced motion along the linear rail (32);
and the sliding block (31) is provided with a small hole, and the small hole is connected with an air bearing (41) in the airflow generating mechanism (4).
7. The vortex-induced motion water tank experimental device for the cylindrical FPSO platform according to claim 2, wherein the air flow generating mechanism (4) comprises an air compressor, a compressed air duct and an air bearing (41), the air bearing (41) is connected with the slide block (31), the air bearing (41) is connected with an external air compressor through the compressed air duct, and an air flow gap is formed between the air bearing (41) and the plane of the linear guide rail (32) during operation.
8. The vortex-induced motion water tank experimental device for the cylindrical FPSO platform according to claim 6, wherein the horizontal mooring mechanism (5) comprises a tension spring (51) and a tension sensor (52), one end of the tension spring (51) is connected with the slide block (31), the other end of the tension spring (51) is connected with the tension sensor (52), the tension sensor (52) is connected with the linear track (32), the surfaces of the tension spring (51) and the linear track (32) are kept parallel, and the numerical value of the tension sensor (52) is subjected to post-processing to obtain the displacement response of the cylindrical FPSO platform model (1).
9. The vortex-induced motion water tank experimental device for the cylindrical FPSO platform according to claim 4, wherein the yawing adjusting mechanism (6) comprises a limiting pin (61), a rolling bearing (62), a clamping ring (63), a linear spring (64) and an inelastic connecting rope (65), the limiting pin (61) is inserted into the sliding block (31) through an opening of the central support column (12) to limit yawing freedom, the limiting pin (61) releases yawing freedom when being pulled out, the rolling bearing (62) is fixed on the sliding block (31) through the clamping ring (63), the central support column (12) of the cylindrical FPSO platform model (1) is suspended above a water tank through an axis of the rolling bearing (62), one end of the linear spring (64) is connected to the sliding block (31), the other end of the linear spring (64) is connected to the inelastic connecting rope (65), the inelastic connecting rope (65) is connected to the central support column (12), and the linear spring (64), the inelastic connecting rope (65) and the surface of the sliding block (31) are kept parallel.
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Cited By (1)
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CN116989983A (en) * | 2023-09-26 | 2023-11-03 | 武汉理工大学三亚科教创新园 | Basin test method and device for ocean mooring platform and vertical pipe |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN116989983A (en) * | 2023-09-26 | 2023-11-03 | 武汉理工大学三亚科教创新园 | Basin test method and device for ocean mooring platform and vertical pipe |
CN116989983B (en) * | 2023-09-26 | 2023-12-22 | 武汉理工大学三亚科教创新园 | Basin test method and device for ocean mooring platform and vertical pipe |
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