CN102313636A - Vortex-induced vibration simulation test device for deep sea riser model with movable top end under action of step flow - Google Patents
Vortex-induced vibration simulation test device for deep sea riser model with movable top end under action of step flow Download PDFInfo
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Abstract
The invention discloses a vortex-induced vibration simulation test device for a deep sea riser model with a movable top end under the action of step flow, relates to the technical field of the oceanographic engineering and solves the technical problem of simulating the vortex-induced vibration of a deep sea riser under the action of the step flow. The device comprises a towing tank, a trailer, a deep sea riser module, a top supporting module, a bottom supporting module, vertical rail modules, a horizontal rail module, a sleeve module and a measurement analysis control module. The horizontal rail module is hung on the trailer. Two vertical rail modules are provided and are respectively and vertically hung on the horizontal rail module. The top supporting module and the bottom supporting module are respectively arranged on the two vertical rail modules and are both provided with acceleration transducers. A sleeve part in the sleeve module is sleeved on the periphery of the riser model of the deep sea riser module. The measurement analysis control module is connected with each fiber grating sensor, each acceleration transducer and each motor. The device provided by the invention can be used for simulating the vertex-induced vibration of the deep sea riser under the action of the step flow.
Description
Technical field
The present invention relates to ocean engineering technology, particularly relate to the technology of movable deep-sea, top riser model vortex-induced vibration simulation test device under a kind of cascade flow.
Background technology
According to fluid mechanics knowledge, the column structure thing is placed in the middle of the incoming flow of certain speed, the whirlpool can take place alternately to rush down in its both sides.Be associated with the generation and the bleed off of whirlpool, cylinder can receive laterally and the fluctuation pressure that flows to.If this moment, cylinder was a resiliency supported, pulsating flow muscle power can cause the vibration of cylinder so, and the vibration of cylinder can change its wake structure again conversely.The interactional problem of this fluidic structures thing is called vortex-induced vibration.For example under the effect of the motion of ocean current or ocean platform; Be suspended on the flexible pipe such as floating drum, mooring hawser of marine ocean platform standpipe, towing cable, subsea pipeline, spar platform and the vortex-induced vibration phenomenon can occur, will cause the fatigure failure of flexible pipe.
So far, be exactly model test method to one of most important method of flexible pipe vortex-induced vibration phenomenon Study.Can deepen understanding through model test method, and reliable riser vortex excited vibration forecast approach and technology are provided the influence of the vortex-induced vibration of the motion riser of compliant riser vortex-induced vibration mechanism and ocean platform.In order to make the phenomenon of simulating in the test approach the truth of occurring in nature more, except adopting advanced test unit, the environment of simulating in the test also must be approaching with nature.In actual ocean, the flow velocity cross section in the entire depth scope is not unalterable.The marine site of the Gulfian 2000m depth of water for example, the mean flow rate in the general top layer 300m are 4 to 5 times of mean flow rate in the 300m-800m depth of water scope, are more than 20 times of the following mean flow rate of 800m.This shows that stair-stepping flow field should be more approached in the flow velocity cross section in the ocean in the entire depth scope.
Retrieval through to the prior art document finds that present vortex vibration testing device generally can only all use under uniform flow or the shear flow environment.Paper " Laboratory Investigation of Long Riser VIV Response " in the 14th international coastal waters and polar region engineering conference " Proceedings of the Fourteen (2004) International Offshore and Polar Engineering Conference " (experimental study of long riser vortex excited vibration response) is about flexible pipe vortex-induced vibration experimental study; Mentioned a kind of flexible pipe vortex-induced vibration model test technology in the literary composition; Be horizontally placed on compliant riser in the towing basin, trailer drags riser model and produces uniform flow field.With the motion that the acceleration transducer that is arranged in riser interiors is measured standpipe, in the standpipe wall, arrange the dependent variable in the grating measuring standpipe wall.The weak point of this experimental technique is: 1) can only simulate the vortex-induced vibration of small scale pipe fitting, scale effect is difficult to avoid; 2) limited by oceanographic engineering pond trailer speed, be difficult to effectively carry out the vortex-induced vibration test under the real Reynolds number; 3) pulled the restriction of oceanographic engineering swimmer's pool length, resulting test section distance is less, and the test figure that records is less; 4) can only simulate the vortex-induced vibration of equal uniform flow, be difficult to carry out the vortex-induced vibration test under the cascade flow; 5) can not carry out the forced oscillation test; 6) can not simulate the motion of ocean platform, thus the influence of research platform motion riser vortex-induced vibration.
Summary of the invention
To the defective that exists in the above-mentioned prior art; Technical matters to be solved by this invention provides a kind of forced oscillation test can carried out, and movable deep-sea, top riser model vortex-induced vibration simulation test device under the cascade flow of vortex-induced vibration that can analogue step flows down and the motion of simulation ocean platform.
In order to solve the problems of the technologies described above; Movable deep-sea, top riser model vortex-induced vibration simulation test device under a kind of cascade flow provided by the present invention; Comprise towing basin; And be used to simulate the deep-sea standpipe module of marine riser, and in the said towing basin Chi Shui being housed, the trailer that an ability straight line moves is set up in its water water surface top, pond; Said deep-sea standpipe module comprises riser model and fiber-optic grating sensor, and said riser model is a pipe fitting, is horizontally placed in the towing basin and the Chi Shuizhong that submerges, and said fiber-optic grating sensor has a plurality of, axially is distributed in the riser model surface along riser model; It is characterized in that: also comprise top braces module, bottom support module, vertical track module, horizontal rail module, sleeve module, Measurement and analysis control module;
Said horizontal rail module comprises two straight horizontal rails that are parallel to each other, and said two straight horizontal rail levels are hung on the trailer, is equipped with a cross sliding clock along its axis slip on the every straight horizontal rail, and one is used for the motor that the controlling level slide block slides;
Said vertical track module has two; Be respectively the first vertical track module, the second vertical track module; Each vertical track module has included a straight vertical rail; Be equipped with a vertical slipper along its axis slip on the every straight vertical rail, reach one and be used to control the motor that vertical slipper slides, the straight vertical rail of two vertical track modules vertically is hung on the cross sliding clock of two straight horizontal rails respectively;
Said top braces module comprises that horizontal seat and first rotates sensing arrangement; Said horizontal seat is fixed on the vertical slipper of the first vertical track module; Said first rotates sensing arrangement comprises first acceleration transducer and first universal joint; The two ends of said riser model are respectively first link, second link, and said first acceleration transducer is installed on the horizontal seat, and connect first link of riser model through first universal joint;
Said bottom support module comprises that support mount pad and second rotates sensing arrangement; Said support mount pad is fixed on the vertical slipper of the second vertical track module; Said second rotates sensing arrangement comprises second acceleration transducer and second universal joint; Said second acceleration transducer is installed on the support mount pad, and connects second link of riser model through second universal joint;
Said sleeve module includes a sleeve member, and said sleeve member is sheathed on the riser model periphery, and is connected with the bottom support module, and its tube length is shorter than the pipe range of riser model;
Said Measurement and analysis control module is installed on the trailer; Comprise the fiber data collection submodule that is used to gather each fiber-optic grating sensor sensed data that connects each fiber-optic grating sensor; Connect the force data collection submodule that is used to gather the acceleration transducer sensed data of first, second acceleration transducer, and connect the Electric Machine Control submodule that is used to control four motors operations of four motors.
Further, said bottom support module also comprises Elastic Sliding assembly and linear bearing, and described Elastic Sliding assembly comprises front end panel and rear bearing sheet; Said linear bearing has at least one; Be installed on the support mount pad, each connects front end panel through a sliding axle end of each linear bearing, and the other end then connects rear bearing sheet; All be arranged with a buffer spring on the every sliding axle, the two ends of every buffer spring connect linear bearing and front end panel respectively; Said second acceleration transducer is installed on the rear bearing sheet.
Further; Also comprise the radome fairing module, said radome fairing module has four, and wherein two symmetries are installed on two sides of straight vertical rail of the first vertical track module; In addition two then symmetry be installed on two sides of straight vertical rail of the second vertical track module; Said radome fairing module comprises radome fairing shell and radome fairing side plate, and each radome fairing shell all is installed in the bound edge mode on the side of corresponding straight vertical rail through the radome fairing side plate of this module, and said radome fairing shell is the wide wing shape of the narrow opposite side of a side; It is open that its narrow side seal closes wide side, and its wide side is over against corresponding straight vertical rail.
Further, the linear mass of said riser model is 1:1 with the ratio that its unit length arranges the quality of water.
Movable deep-sea, top riser model vortex-induced vibration simulation test device under the cascade flow provided by the invention; Utilize the relative motion of vertical track module and horizontal rail module; And the relative motion of trailer and the towing basin incoming flow of simulating different in flow rate, add the local choked flow effect of upper bush module, can carry out forced oscillation and test; Vortex-induced vibration that analogue step flows down and the motion of simulation ocean platform, thus be implemented in simulation deep-sea riser vortex excited vibration under the laboratory environment.
Description of drawings
Fig. 1 is the structural representation of movable deep-sea, top riser model vortex-induced vibration simulation test device under the cascade flow of the embodiment of the invention;
Fig. 2 is the three-dimensional view of deep-sea standpipe module, top braces module, bottom support module, vertical track module, radome fairing module and the sleeve module in the riser model vortex-induced vibration simulation test device of movable deep-sea, top under the embodiment of the invention cascade flow;
Fig. 3 is the vertical track module in the riser model vortex-induced vibration simulation test device of movable deep-sea, top and the three-dimensional view of horizontal rail module under the embodiment of the invention cascade flow;
Fig. 4 is the structural representation of the deep-sea standpipe module in the riser model vortex-induced vibration simulation test device of movable deep-sea, top under the embodiment of the invention cascade flow;
Fig. 5 is the structural representation of the top braces module in the riser model vortex-induced vibration simulation test device of movable deep-sea, top under the embodiment of the invention cascade flow;
Fig. 6 is the main TV structure synoptic diagram of the bottom support module in the riser model vortex-induced vibration simulation test device of movable deep-sea, top under the embodiment of the invention cascade flow;
Fig. 7 be under the embodiment of the invention cascade flow bottom support module in the riser model vortex-induced vibration simulation test device of movable deep-sea, top look up structural representation;
Fig. 8 is the vertical track module in the riser model vortex-induced vibration simulation test device of movable deep-sea, top and the structural representation of radome fairing module under the embodiment of the invention cascade flow;
Fig. 9 is the three-dimensional view of the horizontal rail module in the riser model vortex-induced vibration simulation test device of movable deep-sea, top under the embodiment of the invention cascade flow;
Figure 10 is the structural representation of the radome fairing module in the riser model vortex-induced vibration simulation test device of movable deep-sea, top under the embodiment of the invention cascade flow;
Figure 11 is the stereographic map of the motor in the riser model vortex-induced vibration simulation test device of movable deep-sea, top under the embodiment of the invention cascade flow;
Figure 12 is the structural representation of the sleeve module in the riser model vortex-induced vibration simulation test device of movable deep-sea, top under the embodiment of the invention cascade flow;
Figure 13 is the connection synoptic diagram of the Measurement and analysis control module in the riser model vortex-induced vibration simulation test device of movable deep-sea, top under the embodiment of the invention cascade flow.
Embodiment
Below in conjunction with description of drawings embodiments of the invention are described in further detail, but present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar variation thereof all should be listed protection scope of the present invention in.
Like Fig. 1-shown in Figure 4; Movable deep-sea, top riser model vortex-induced vibration simulation test device under a kind of cascade flow that the embodiment of the invention provided; Comprise towing basin 11; And be used to simulate the deep-sea standpipe module 1 of marine riser, and in the said towing basin 11 Chi Shui being housed, the trailer 10 that an ability straight line moves is set up in its water water surface top, pond; It is characterized in that: also comprise top braces module 2, bottom support module 3, vertical track module 4, horizontal rail module 5, radome fairing module 7, sleeve module 8, Measurement and analysis control module 9.
Like Fig. 1, shown in Figure 4; Said deep-sea standpipe module 1 comprises riser model 15 and fiber-optic grating sensor 13, and said riser model 15 is pipe fittings, is horizontally placed in the towing basin 11 and the Chi Shuizhong that submerges; Its two ends respectively are fixed with a standpipe fixture splice 14; Its linear mass is 1:1 with the ratio that its unit length arranges the quality of water, and said fiber-optic grating sensor 13 has a plurality of, axially is distributed in riser model 15 surfaces along riser model 15.
Like Fig. 1, Fig. 3, shown in Figure 9; Said horizontal rail module 5 comprises two straight horizontal rails 36 that are parallel to each other; And the brace summer 35 of two straight horizontal rails of fixed connection; Said two straight horizontal rails, 36 each warp hook 45 level are hung on the trailer 10, be equipped with a cross sliding clock 37 along its axis slip on the every straight horizontal rail 36, and one are used for the motor 6 that controlling level slide block 37 slides.
Like Fig. 1, Fig. 3, shown in Figure 8; Said vertical track module 4 has two; Be respectively the first vertical track module, the second vertical track module; Each vertical track module 4 includes straight vertical rail 33, and is fixed on the top contiguous block 12 on straight vertical rail 33 tops, is equipped with a vertical slipper 34 along its axis slip on the every straight vertical rail 33; And one be used to control 6, two vertical track modules 4 of motor that vertical slipper 34 slides straight vertical rail 33 each vertically be hung on respectively on the cross sliding clock 37 of two straight horizontal rails 36 through the top on top contiguous block 12.
Like Fig. 1, shown in Figure 5; Said top braces module 2 comprises horizontal seat 17, back up pad 18 and the first rotation sensing arrangement 19; Said horizontal seat 17 is fixed on the vertical slipper 34 of the first vertical track module 4 through a top link 16; Said back up pad 18 is fixed on the horizontal seat 17, and said first rotates sensing arrangement 19 comprises first acceleration transducer 21 and first universal joint 20, and the two ends of said riser model 15 are respectively first link, second link; Said first acceleration transducer 21 is installed on the back up pad 18, and connects the standpipe fixture splice 14 of riser model 15 first links through first universal joint 20.
Like Fig. 1, Fig. 6, shown in Figure 7, said bottom support module 3 provides buffer action when being used for process of the test mesopelagic (200 standpipe module 1 generation vortex-induced vibration, comprises that support mount pad 25, Elastic Sliding assembly 22, linear bearing 26 and second rotate sensing arrangement 23,
Said support mount pad 25 is fixed on the vertical slipper 34 of the second vertical track module 4 through a bottom link 24;
Described Elastic Sliding assembly 22 comprises front end panel 27 and rear bearing sheet 30; Said linear bearing 26 has at least one; Be installed on the support mount pad 25, each connects front end panel 27 through a sliding axle 28 end of each linear bearing 26, and the other end then connects rear bearing sheet 30; All be arranged with a buffer spring 29 on the every sliding axle 28, the two ends of every buffer spring 29 connect linear bearing 26 and front end panel 27 respectively;
Said second rotates sensing arrangement 23 comprises second acceleration transducer 31 and second universal joint 32, and said second acceleration transducer 31 is installed on the rear bearing sheet 30, and connects the standpipe fixture splice 14 of riser model 15 second links through second universal joint 32.
Like Fig. 1, shown in Figure 12; Said sleeve module 8 comprises sleeve connecting link 40 and sleeve member 41, and said sleeve member 41 is sheathed on riser model 15 peripheries, and it is affixed to connect bottom support module 3 through sleeve connecting link 40; Its tube length is shorter than the pipe range of riser model 15; Under the effect of sleeve member 41, riser model 15 pipeline sections that are enclosed within the sleeve member 41 do not receive the effect of current in simulation test, thereby can analogue step stream.
Like Fig. 1, shown in Figure 12; Said Measurement and analysis control module 9 is installed on the trailer 10; Comprise the fiber data collection submodule 42 that is used to gather each fiber-optic grating sensor sensed data that connects each fiber-optic grating sensor in the standpipe module 1 of deep-sea; The force data collection submodule 43 that is used to gather the acceleration transducer sensed data of first acceleration transducer in the connection top braces module 2 and second acceleration transducer in the bottom support module 3, and the Electric Machine Control submodule 44 that is used to control four motors operations of four motors 6 of connection.
Like Fig. 1, shown in Figure 10; Said radome fairing module 7 has four; Wherein two symmetries are installed on two sides of straight vertical rail 33 of the first vertical track module; In addition two then symmetry be installed on two sides of straight vertical rail 33 of the second vertical track module, be used for reducing the resistance and the wave making of analogue means motion process, said radome fairing module 7 comprises radome fairing shell 38 and radome fairing side plate 39; Each radome fairing shell 38 all is installed on the side of corresponding straight vertical rail 33 through the radome fairing side plate 39 of this module with the bound edge mode; Said radome fairing shell 38 is the wide wing shape of the narrow opposite side of a side, and it is open that its narrow side seal closes wide side, and its wide side is over against corresponding straight vertical rail 33.
In the embodiment of the invention; Said trailer 10 is prior art with towing basin 11; Trailer 10 can be realized the linear uniform motion under the two-way friction speed; The Chi Shui of towing basin 11 dress certain depths, for riser model 15 provides water environment, the cascade flow that Chi Shui and riser model 15 relative motions can be simulated different in flow rate.
When the embodiment of the invention is carried out simulated experiment; The large scale riser model can be installed, avoid scale effect, the high speed that can also make full use of trailer is simulated the real Reynolds number vortex-induced vibration of large scale riser model; Can also make full use of the length of towing basin; Long distance test, the longer more stable test figure of acquisition can also utilize vertical track module and horizontal rail module to carry out the forced oscillation test of riser model; Can also utilize the motion of vertical track module and horizontal rail module to simulate the motion of ocean platform; Thereby the influence of research ocean platform motion riser vortex-induced vibration, owing to, make the inner riser model pipeline section of sleeve member not receive in test the effect of current at riser model part pipeline section outer setting sleeve member; Can realize the simulation of cascade flow, make that the external environment condition of simulation riser model is truer.
The embodiment of the invention can be divided into following several types with the problem of research according to the motion state of top braces module, bottom support module and two vertical track modules:
1) the Measurement and analysis control module stops along the vertical track block motion through Electric Machine Control top braces module and bottom support module; And two vertical track modules are stopped along the horizontal rail block motion; Let this moment trailer drive whole device motion, can study the deep-sea standpipe at the vortex-induced vibration that does not receive under the ocean platform motion effects;
2) the Measurement and analysis control module stops along the horizontal rail block motion through two vertical track modules of Electric Machine Control; And make top braces module and bottom support module along vertical track module separately synchronous do the to-and-fro movement on the vertical direction; And trailer is motionless, just can study the forced vibration of deep-sea standpipe;
3) the Measurement and analysis control module is done the to-and-fro movement of vertical direction along the vertical track module through Electric Machine Control top braces module; And make bottom support module, two vertical track modules and trailer stop motion, just can study the only vortex-induced vibration under the effect of ocean platform motion of deep-sea standpipe;
4) the Measurement and analysis control module is done the to-and-fro movement of vertical direction along the vertical track module through Electric Machine Control top braces module; And make bottom support module and two vertical track block motion; Let trailer drive the motion of whole device simultaneously, just can study the deep-sea standpipe the flow direction perpendicular to the incoming flow effect of ocean platform direction of motion under and vortex-induced vibration under the ocean platform motional effects;
5) the Measurement and analysis control module stops along the vertical track block motion through Electric Machine Control top braces module and bottom support module; And make the vertical track module that links to each other with the top braces module do the to-and-fro movement of horizontal direction along the horizontal rail module; Another vertical track module is stopped along the horizontal rail block motion; Let trailer drive the motion of whole device, just can study under the deep-sea standpipe is parallel to ocean platform direction of motion in the flow direction the incoming flow effect and the vortex-induced vibration under the ocean platform motional effects;
6) the Measurement and analysis control module is done the to-and-fro movement of vertical direction along the vertical track module through Electric Machine Control top braces module; Make the vertical track module that links to each other with the top braces module do the to-and-fro movement of horizontal direction along the horizontal rail module; And in motion process their movement velocity of adjustment; The bottom support module is stopped along the vertical track block motion; The vertical track module that links to each other with the bottom support module is stopped along the horizontal rail block motion, lets trailer drive the motion of whole device, just can study the deep-sea standpipe under the motion effects of the various directions of ocean platform incoming flow to its vortex-induced vibration that causes.
Claims (4)
1. movable deep-sea, top riser model vortex-induced vibration simulation test device under the cascade flow; Comprise towing basin; And be used to simulate the deep-sea standpipe module of marine riser, and in the said towing basin Chi Shui being housed, the trailer that an ability straight line moves is set up in its water water surface top, pond; Said deep-sea standpipe module comprises riser model and fiber-optic grating sensor, and said riser model is a pipe fitting, is horizontally placed in the towing basin and the Chi Shuizhong that submerges, and said fiber-optic grating sensor has a plurality of, axially is distributed in the riser model surface along riser model; It is characterized in that: also comprise top braces module, bottom support module, vertical track module, horizontal rail module, sleeve module, Measurement and analysis control module;
Said horizontal rail module comprises two straight horizontal rails that are parallel to each other, and said two straight horizontal rail levels are hung on the trailer, is equipped with a cross sliding clock along its axis slip on the every straight horizontal rail, and one is used for the motor that the controlling level slide block slides;
Said vertical track module has two; Be respectively the first vertical track module, the second vertical track module; Each vertical track module has included a straight vertical rail; Be equipped with a vertical slipper along its axis slip on the every straight vertical rail, reach one and be used to control the motor that vertical slipper slides, the straight vertical rail of two vertical track modules vertically is hung on the cross sliding clock of two straight horizontal rails respectively;
Said top braces module comprises that horizontal seat and first rotates sensing arrangement; Said horizontal seat is fixed on the vertical slipper of the first vertical track module; Said first rotates sensing arrangement comprises first acceleration transducer and first universal joint; The two ends of said riser model are respectively first link, second link, and said first acceleration transducer is installed on the horizontal seat, and connect first link of riser model through first universal joint;
Said bottom support module comprises that support mount pad and second rotates sensing arrangement; Said support mount pad is fixed on the vertical slipper of the second vertical track module; Said second rotates sensing arrangement comprises second acceleration transducer and second universal joint; Said second acceleration transducer is installed on the support mount pad, and connects second link of riser model through second universal joint;
Said sleeve module includes a sleeve member, and said sleeve member is sheathed on the riser model periphery, and is connected with the bottom support module, and its tube length is shorter than the pipe range of riser model;
Said Measurement and analysis control module is installed on the trailer; Comprise the fiber data collection submodule that is used to gather each fiber-optic grating sensor sensed data that connects each fiber-optic grating sensor; Connect the force data collection submodule that is used to gather the acceleration transducer sensed data of first, second acceleration transducer, and connect the Electric Machine Control submodule that is used to control four motors operations of four motors.
2. device according to claim 1; It is characterized in that: said bottom support module also comprises Elastic Sliding assembly and linear bearing; Described Elastic Sliding assembly comprises front end panel and rear bearing sheet, and said linear bearing has at least one, is installed on the support mount pad; Each connects front end panel through a sliding axle one end of each linear bearing; The other end then connects rear bearing sheet, all is arranged with a buffer spring on the every sliding axle, and the two ends of every buffer spring connect linear bearing and front end panel respectively; Said second acceleration transducer is installed on the rear bearing sheet.
3. device according to claim 1; It is characterized in that: also comprise the radome fairing module, said radome fairing module has four, and wherein two symmetries are installed on two sides of straight vertical rail of the first vertical track module; In addition two then symmetry be installed on two sides of straight vertical rail of the second vertical track module; Said radome fairing module comprises radome fairing shell and radome fairing side plate, and each radome fairing shell all is installed in the bound edge mode on the side of corresponding straight vertical rail through the radome fairing side plate of this module, and said radome fairing shell is the wide wing shape of the narrow opposite side of a side; It is open that its narrow side seal closes wide side, and its wide side is over against corresponding straight vertical rail.
4. device according to claim 1 is characterized in that: the linear mass of said riser model is 1:1 with the ratio that its unit length arranges the quality of water.
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| CN108597344A (en) * | 2018-07-13 | 2018-09-28 | 江苏科技大学 | The experimental provision and its application method of vortex-induced vibration in the steady motion of a fluid |
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