CN104819857A - Marine deep water floating platform vortex induced motion model experimental device - Google Patents
Marine deep water floating platform vortex induced motion model experimental device Download PDFInfo
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Abstract
The invention discloses a marine deep water floating platform vortex induced motion model experimental device which comprises a supporting frame, a vertical connecting mechanism and a horizontal connecting mechanism. The supporting frame comprises a top flat plate, a top fixed device and a horizontal fixed device. The vertical connecting mechanism comprises an air floating platform, a pressure spring and a pressure sensor. The air floating platform is formed by an air compressor, a compressed air supply pipe and an air bearing. The horizontal connecting mechanism comprises a mooring connecting member, a tension spring and a pull force sensor. For the shortage of the prior art, the technical problem that a fine platform vortex induced motion test can not be carried out is solved. The device is suitable for a semi-submersible platform and a tension leg platform in the field of marine engineering technology, while the vertical anchoring load is provided for a deep water floating platform, the technical requirements of horizontal plane free movement is maintained, and the device has the advantages of simple structure, convenient operation, stable operation and so on.
Description
Technical field
The present invention relates to a kind of experimental provision for field of ocean engineering, be specifically related to a kind of whirlpool being applicable to the ocean deepwater such as semisubmersible platform, tension leg platform (TLP) floating platform and swash motion model experimental provision.
Background technology
The advantages such as ocean deepwater floating platform, comprises semisubmersible platform, tension leg platform (TLP) etc., and capacity of anti-storm is strong owing to supporting, adaptation depth of water scope is wide, have become one of important ocean oil and gas resource exploration and exploitation equipment.But, semisubmersible platform and tension leg platform (TLP) are typical many columns buoyancy aid, under the action of ocean current of deep-sea, and its column rear meeting generating period vortex shedding, cause fluctuation pressure to produce, and then cause the to-and-fro movement that platform produces long period, large amplitude in surface level.Structural strength and the fatigue lifetime that athletic meeting affects the components such as platform anchor chain, standpipe and tension leg is swashed in this large-scale whirlpool, affects normal offshore operation.Therefore, one of the study hotspot and difficult point that motion has become oceanographic engineering field is swashed in the whirlpool of ocean deepwater floating platform.Due to platform profile and the external influence factors of complexity, model experiment is the main research means that motion is swashed in deepwater floating platform whirlpool.
For keeping even, stable flow field, whirlpool is swashed motion model experiment and is usually carried out in boats and ships towing basin, and adopts equivalent horizontal mooring system by platform model mooring under pool trailer, follows trailer and does and at the uniform velocity advance.Owing to have ignored the vertical load of original mooring system in experiment, traditional way is on the basis of analog platform sole mass, increase extra ballast quality, by the Reduced-scale model ballast of platform to designed water line, to compensate the vertical load of mooring system to platform.In fact this way changes the quality of platform model and the ratio of water discharge, affects its whirlpool and swashs kinetic characteristic, and affect final experimental result.Therefore, swash in whirlpool in exercise testing, the ratio of identical quality and water discharge should be ensured, and platform motion in the horizontal direction can not be limited.Therefore, appropriate experimental provision must be designed, swash every characteristic of motion with accurate simulation platform whirlpool.
Through finding the retrieval of prior art, Chinese patent literature CN200620047162, publication date on October 17th, 2007, disclose one and swash motion model test unit for open side type ocean platform whirlpool, comprise mooring ring, mooring hole, wing hanging column, little bracket, transverse slat, the segmentation of model mooring line, floating drum, pouring weight, equivalent riser systems, open side type offshore platform model, trailer, non-contact optical measuring system, pulling force sensor, strain amplifier, termination, automatic data collection card and computer real-time analysis system.Carry out the static characteristics of equivalent actual mooring system by equivalent mooring system, carry out the static characteristics of equivalent actual riser system with equivalent riser systems.Model mooring frame is made up of wing hanging column, mooring ring, mooring hole, little bracket and transverse slat, and the cross sectional shape of wing hanging column is airfoil, and mooring hole is uniformly distributed around mooring ring for one week.But the marine site depth of water residing for deepwater floating platform is profound, and the depth of water of each platform differs greatly, and the depth of water of boats and ships towing basin is general less, therefore this device is difficult to simulation deep water marine environment, and structure is comparatively heavy, be difficult to regulate respective depth according to actual depth condition, be difficult to implement effectively.Further, the aerofoil profile hanging column of device swashs in whirlpool in the towing process of exercise testing and can produce vortex-induced vibration in water, impact test flow field, and causes platform model Self generating oscillations, affects experiment test precision.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, provide a kind of and swash the bath scaled model experimental device of motion for ocean deepwater floating platform whirlpool in boats and ships towing basin, solve and cannot carry out the technological difficulties that exercise test is swashed in meticulous platform whirlpool.This device meets for while deepwater floating platform provides vertical mooring load, keeps the free-moving technical requirement of its surface level, and has the features such as structure is simple, simple operation, working stability.
For achieving the above object, the invention provides following technical scheme:
Motion model experimental provision is swashed in a kind of ocean deepwater floating platform whirlpool, comprises support frame, vertical bindiny mechanism and level connection joint mechanism three part.One end of vertical bindiny mechanism is connected to support frame, other end connecting platform model.Similar, one end of level connection joint mechanism is connected to support frame, other end connecting platform model.
Support frame comprises head slab, top fixture, horizontal stationary installation, and head slab is positioned at below top fixture.Head slab is be arranged on that between top fixture and platform model one is smooth, the metal plate of level, and head slab is used for the vertical mooring load of carrying platform model.The height of top fixture and levelness can regulate, and for regulating, platform model absorbs water, the levelness of vertical mooring magnitude of load and head slab.The trailer of top fixture and towing basin is fixed, and is synchronized with the movement with trailer.Horizontal stationary installation is a horizontally disposed truss-like circular ring structure, free, fast rotational can regulate in the horizontal direction, swash exercise testing to adapt to carrying out platform whirlpool under different incoming flow angle.
Vertical bindiny mechanism comprises air floating platform, stage clip, pressure transducer, and pressure transducer is between air floating platform and stage clip.Vertical bindiny mechanism is by the combination of air floating platform and stage clip, while the vertical mooring load of guarantee and mooring rigidity, keep, between air floating platform and head slab, there is certain interval, avoid the friction force of horizontal direction, thus avoid affecting platform model kinetic characteristic in the horizontal direction.Air floating platform is made up of air compressor, pressurized air air supply pipe and air bearing, and pressurized air provides the vertical mooring load needed for platform model by air bearing.Stage clip is used for analog platform mooring system mooring rigidity in vertical direction.Pressure transducer can the size of measuring table vertical load in real time, with the stress of accurate measurements platform model.
Level connection joint mechanism comprises mooring connecting elements, extension spring, pulling force sensor.Level connection joint mechanism by level, the arranged crosswise mode of extension spring, and coordinates the mooring connecting elements of seemly diameter, and analog platform model horizontal rigidity and head shake stiffness characteristics simultaneously, provide and reply force and moment accordingly.Mooring connecting elements is the circular metal structure of a seemly diameter, and level is installed on platform model, and for connecting platform model and horizontal mooring system, its diameter should shake rigidity according to the corresponding horizontal rigidity of platform and head and comprehensively determine.Pulling force sensor is used for the size of horizontal load suffered by Real-Time Monitoring platform model.
The invention has the beneficial effects as follows:
The invention provides a kind of in boats and ships towing basin, swash the bath scaled model experimental device of motion for ocean deepwater floating platform whirlpool, solve and cannot carry out the technological difficulties that exercise testing is swashed in meticulous whirlpool in towing basin.This device meets for floating platform provides vertical mooring load, the ratio of accurate simulation platform mass and water discharge, and does not limit the technical requirement of its horizontal motion, and has the features such as structure is simple, simple operation, working stability.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand object of the present invention, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is the schematic side view that motion model experimental provision is swashed in the ocean deepwater floating platform whirlpool of a preferred embodiment of the present invention;
Fig. 2 is for swashing the schematic top plan view of motion model experimental provision in the ocean deepwater floating platform whirlpool shown in Fig. 1;
Fig. 3 is for swashing the schematic top plan view of another state of motion model experimental provision in the ocean deepwater floating platform whirlpool shown in Fig. 1;
Fig. 4 is the vertical bindiny mechanism schematic diagram that motion model experimental provision is swashed in the ocean deepwater floating platform whirlpool of a preferred embodiment of the present invention.
Embodiment
Embodiment is described in further detail the present invention below, and embodiment implements under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Fig. 1 is that the integrally-built schematic side view of motion model experimental provision is swashed in ocean deepwater floating platform whirlpool.Experimental provision comprises support frame 2, the vertical bindiny mechanism 3 for connecting platform model 1, level connection joint mechanism 4 three part for connecting platform model 1.Support frame 2 comprises head slab 21, top fixture 22, horizontal stationary installation 23.Head slab 21 for being arranged on a level between top fixture 22 and platform model 1, smooth metal plate, for the vertical mooring load of carrying platform model 1.Top fixture 22 is fixed with the trailer 5 of towing basin, and be synchronized with the movement with trailer 5, trailer 5 moves on carriage track 6.The height of top fixture 22 and levelness can regulate, and absorb water, the levelness of vertical mooring magnitude of load and head slab 21 for regulating platform model 1.Horizontal stationary installation 23 provides the horizontal mooring system of installing equivalence, and fixes with the trailer 5 of towing basin, is synchronized with the movement with trailer 5.Horizontal stationary installation 23 is a horizontally disposed truss-like circular ring structure, can in the horizontal direction freely, fast rotational regulates, under different incoming flow angle, carry out platform whirlpool swash exercise testing to facilitate.Fig. 2 and Fig. 3 is the schematic top plan view that two kinds of differences that motion model experimental provision is swashed in ocean deepwater floating platform whirlpool arrange state respectively.Under two states, platform model 1 is different from the angle of incoming flow, and arrow indication is drag direction.
Fig. 4 is the structural representation of vertical bindiny mechanism 3.Vertical bindiny mechanism 3 comprises air floating platform 31, stage clip 32, pressure transducer 33, and vertical bindiny mechanism 3 is connected with platform model 1 by bottom bindiny mechanism 34.Air floating platform 31 is made up of air compressor, pressurized air air supply pipe and air bearing, and pressurized air can provide the vertical mooring load needed for platform model by air bearing.Stage clip 32 is for analog platform mooring system mooring rigidity in vertical direction.Pressure transducer 33 can measuring table vertical load size in real time, with the stress of accurate measurements platform model 1.By the combination of air floating platform 31 with stage clip 32, while the vertical mooring load of guarantee and mooring rigidity, keep, between air floating platform 31 and head slab 21, there is certain interval, avoid the friction force of horizontal direction, thus avoid affecting platform model 1 kinetic characteristic in the horizontal direction.
Level connection joint mechanism 4 comprises mooring connecting elements, extension spring, pulling force sensor.Mooring connecting elements is the circular metal structure of a seemly diameter, and level is installed on platform model 1, and for connecting platform model 1 and horizontal mooring system, its diameter should shake rigidity according to the corresponding horizontal rigidity of platform and head and comprehensively determine.By extension spring level, arranged crosswise mode each other, coordinate the mooring connecting elements of seemly diameter simultaneously the horizontal rigidity of analog platform model 1 and head can shake rigidity, provide and reply force and moment accordingly.Pulling force sensor is used for the size of horizontal load suffered by Real-Time Monitoring platform model 1.
The using method of the ocean deepwater floating platform torrent motion model experimental provision that the present embodiment provides is as follows:
By regulating weight center of gravity, the test platform model 1 of inertia lifts in towing basin, and top fixture 22 is fixedly connected with towing basin trailer 5 with horizontal stationary installation 23.With extension spring and the pulling force sensor of four arranged crosswise, in the horizontal direction platform model 1 being connected with horizontal stationary installation 23, ensureing that two ends level altitude is consistent, by regulating extension spring length, ensureing to meet horizontal pretension requirement.Test platform model 1 in vertical direction, is connected with top fixture 22 by vertical bindiny mechanism 3, by regulating top fixture 22 height, meeting test platform model 1 and absorbing water requirement, by regulating stage clip 33, making it meet vertical pretension requirement.Start air compressor, start trailer 5, test platform is advanced by the speed of regulation under the drive of trailer 5, and records motion and the stressing conditions of test platform in towage process.By changing the fixed-direction of level connection joint mechanism 4, thus changing test platform model 1 and the angle of incoming flow, repeating above-mentioned experimentation.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technician in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (10)
1. a motion model experimental provision is swashed in ocean deepwater floating platform whirlpool, it is characterized in that, described experimental provision comprises support frame, the vertical bindiny mechanism for connecting platform model, level connection joint mechanism three part for connecting platform model.
2. motion model experimental provision is swashed in a kind of ocean deepwater floating platform whirlpool according to claim 1, it is characterized in that, described support frame comprises head slab, top fixture, horizontal stationary installation, and described head slab is positioned at below described top fixture.
3. motion model experimental provision is swashed in a kind of ocean deepwater floating platform whirlpool according to claim 2, it is characterized in that, described head slab is be arranged on that between described top fixture and described platform model one is smooth, the metal plate of level, and described head slab is for carrying the vertical mooring load of described platform model.
4. motion model experimental provision is swashed in a kind of ocean deepwater floating platform whirlpool according to claim 2, it is characterized in that, the height of described top fixture and levelness can regulate, and for regulating, described platform model absorbs water, the levelness of vertical mooring magnitude of load and described head slab.
5. motion model experimental provision is swashed in a kind of ocean deepwater floating platform whirlpool according to claim 2, it is characterized in that, described horizontal stationary installation is a horizontally disposed truss-like circular ring structure, described truss-like circular ring structure can free, fast rotational regulate in the horizontal direction, swashs exercise testing to adapt to carrying out platform whirlpool under different incoming flow angle.
6. motion model experimental provision is swashed in a kind of ocean deepwater floating platform whirlpool according to claim 1, it is characterized in that, described vertical bindiny mechanism comprises air floating platform, stage clip, pressure transducer, and described pressure transducer is between described air floating platform and described stage clip.
7. motion model experimental provision is swashed in a kind of ocean deepwater floating platform whirlpool according to claim 6, it is characterized in that, described vertical bindiny mechanism is by the combination of described air floating platform and described stage clip, while the vertical mooring load of guarantee and mooring rigidity, keep, between described air floating platform and described head slab, there is certain interval, avoid the friction force of horizontal direction, thus avoid affecting described platform model kinetic characteristic in the horizontal direction.
8. motion model experimental provision is swashed in a kind of ocean deepwater floating platform whirlpool according to claim 6, it is characterized in that, described air floating platform is made up of air compressor, pressurized air air supply pipe and air bearing, and pressurized air provides the vertical mooring load needed for described platform model by described air bearing.
9. motion model experimental provision is swashed in a kind of ocean deepwater floating platform whirlpool according to claim 1, and it is characterized in that, described level connection joint mechanism comprises mooring connecting elements, extension spring, pulling force sensor.
10. motion model experimental provision is swashed in a kind of ocean deepwater floating platform whirlpool according to claim 9, it is characterized in that, described level connection joint mechanism is by level, the arranged crosswise mode of described extension spring, and coordinate the described mooring connecting elements of seemly diameter, simulate described platform model horizontal rigidity and head shakes stiffness characteristics simultaneously, provide and reply force and moment accordingly.
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| CN108414191A (en) * | 2018-02-09 | 2018-08-17 | 山东交通学院 | It is a kind of to consider that motion analysis system and method are swashed in the floating cylinder whirlpool that draw ratio influences |
| CN109696293A (en) * | 2019-01-23 | 2019-04-30 | 上海交通大学 | A kind of sharp exercise pool experimental rig in deep-sea polystyle mooring floating platform whirlpool |
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| CN105865976A (en) * | 2016-05-25 | 2016-08-17 | 上海交通大学 | Ocean structure fine model viscosity performance test platform |
| CN106498897A (en) * | 2016-11-07 | 2017-03-15 | 上海交通大学 | A kind of adjustable offshore platform model assay device and experimental technique |
| CN106644379A (en) * | 2016-11-07 | 2017-05-10 | 上海交通大学 | Sea platform test device and test method based on magnetic suspension principle |
| CN106644379B (en) * | 2016-11-07 | 2019-07-16 | 上海交通大学 | A kind of ocean platform experimental rig and experimental method based on magnetic suspension principle |
| CN106542050A (en) * | 2016-11-08 | 2017-03-29 | 上海交通大学 | A kind of tension leg platform (TLP) model mooring gear |
| CN106542050B (en) * | 2016-11-08 | 2018-05-22 | 上海交通大学 | A kind of tension leg platform (TLP) model mooring gear |
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| CN108414191A (en) * | 2018-02-09 | 2018-08-17 | 山东交通学院 | It is a kind of to consider that motion analysis system and method are swashed in the floating cylinder whirlpool that draw ratio influences |
| CN109696293B (en) * | 2019-01-23 | 2019-12-10 | 上海交通大学 | Deep sea multi-column type mooring floating platform vortex-induced motion water tank test device |
| CN109696293A (en) * | 2019-01-23 | 2019-04-30 | 上海交通大学 | A kind of sharp exercise pool experimental rig in deep-sea polystyle mooring floating platform whirlpool |
| CN110132837A (en) * | 2019-04-28 | 2019-08-16 | 江苏科技大学 | A kind of synchronous measuring apparatus and method for underwater planar surface frictional resistance |
| WO2021054643A1 (en) * | 2019-09-18 | 2021-03-25 | 한국해양과학기술원 | Nonlinear mooring simulation device |
| CN110907129A (en) * | 2019-11-29 | 2020-03-24 | 中国计量大学 | Air-float supporting device with one-dimensional freedom and air seal |
| CN110907129B (en) * | 2019-11-29 | 2021-12-03 | 中国计量大学 | Air-float supporting device with one-dimensional freedom and air seal |
| CN111122142A (en) * | 2020-01-14 | 2020-05-08 | 浙江大学 | Experimental device and method for researching dynamic response and flow field characteristics of anchor chain under cyclic motion |
| CN111122142B (en) * | 2020-01-14 | 2023-12-19 | 浙江大学 | Experimental device and method for researching dynamic response and flow field characteristics of anchor chain under cyclic motion |
| CN111366332A (en) * | 2020-04-28 | 2020-07-03 | 中山大学 | Three-degree-of-freedom decomposition mooring structure measurement experimental device |
| CN112985762A (en) * | 2021-02-22 | 2021-06-18 | 华南理工大学 | Seaworthiness device for ship model six-degree-of-freedom motion measurement |
| CN112985762B (en) * | 2021-02-22 | 2022-04-22 | 华南理工大学 | Seaworthiness device for ship model six-degree-of-freedom motion measurement |
| CN113340562A (en) * | 2021-06-28 | 2021-09-03 | 上海交通大学 | Test device for vortex-induced motion water pool of tension leg platform |
| CN113371151A (en) * | 2021-06-29 | 2021-09-10 | 天津大学 | Tension leg platform vortex-induced motion pool model experimental device |
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