CN105181281B - The single standpipe vortex vibration testing device of inclination angle uniform incoming flow condition deep-sea tension type - Google Patents
The single standpipe vortex vibration testing device of inclination angle uniform incoming flow condition deep-sea tension type Download PDFInfo
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- CN105181281B CN105181281B CN201510401292.4A CN201510401292A CN105181281B CN 105181281 B CN105181281 B CN 105181281B CN 201510401292 A CN201510401292 A CN 201510401292A CN 105181281 B CN105181281 B CN 105181281B
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Abstract
The invention discloses a kind of single standpipe vortex vibration testing device of inclination angle uniform incoming flow condition deep-sea tension type, including marine riser model, transverse test support, trailer, strain acquirement instrument and computer, the both ends of marine riser model are provided with the end support meanss being connected with transverse test support, and transverse test support is fixed on the bottom of trailer;Marine riser model includes some wires and a thin-wall copper pipe; if the outer surface of thin-wall copper pipe is successively to being externally provided with the dried layer thermoplastic tube being closely contacted with each other and one layer of silicone tube; the foil gauge that multi-disc is used to gather strain is provided between thin-wall copper pipe and thermoplastic tube; wire and pulling force sensor couple with strain acquirement instrument, and strain acquirement instrument is connected with computer.The present invention compensate for the deficiency of academia in this respect, while apparatus of the present invention design and produce simply, cheap, easy for installation, easily promote, and can provide necessary equipment support to study the vortex-induced vibration of marine riser of inclination angle uniform incoming flow condition.
Description
Technical field
The present invention relates to a kind of experimental rig of field of ocean engineering, specifically, refers to one kind and inclines
The single standpipe vortex vibration testing device of angle uniform incoming flow condition deep-sea tension type.
Background technology
Increasingly deficient with landing field petroleum resources, the exploitation of Marine oil and gas resource has obtained fast development, deepwater field
Proportion of the yield in total oil extraction increase year by year.Riser systems are indispensable in deep-sea oil mining system
Key component.Standpipe is connected to hydrocarbon sub-marine field and offshore work platform, drilled offshore work platform, drain,
Lead the work such as mud.As oil-gas mining marches to deep-sea, the operating water depth of standpipe is also increasing, in deepwater regions, wave and
Sea ship motion damages gradual decrease to caused by standpipe, but ocean current becomes the principal element for causing standpipe to damage.Ocean current
Effect depth of water scope it is very big, when ocean current passes through marine riser, standpipe trailing edge will produce alternate vortex shedding, when whirlpool takes off
Fall frequency it is close with the standpipe natural frequency of vibration when, it is attached that the vibration of standpipe will force vortex shedding frequency to be fixed on the pipeline natural frequency of vibration
Closely, so as to occurring " to lock " phenomenon.The vortex-induced vibration of standpipe and " locking " phenomenon are to cause the master of standpipe unstability and fatigue rupture
Want factor.Standpipe is during actual job, and because offshore work platform is in offshore floating, balance is often deviateed on sea level
Position, this frequently results in standpipe run-off the straight, i.e. angle between ocean current and standpipe is sent out into deflection by 90 degree.Flowed down at inclination angle
The genesis mechanism of standpipe vortex-induced vibration and braking measure need further to probe into.
At present, the more concern structures axial direction situations vertical with incoming of research of the academia to vortex-induced vibration, actual sea
In foreign engineering, vertical tube structure is axially not fully vertical with incoming, certain angle of inclination be present.For this complicated situation,
There is scholar to propose to tilt the uncorrelated principle of flexible cylindrical vortex-induced vibration, that is, assume to tilt flexible cylindrical vortex-induced vibration and carry out flow velocity
It is of equal value to spend vertical cylinder situation caused by the vertical direction projection components in structure axial direction.However, uncorrelated principle it is correct with
It is no that there are still dispute so far.Need development systematic Study badly.The method of model test is that research inclination angle uniform incoming flow condition is deep
The single standpipe vortex-induced vibration of extra large tension type and its maximally effective means of braking measure.By model test, can comprehensively see
Vortex-induced vibration phenomenon, the inclination angle of incoming are surveyed to influencing mechanism of vortex-induced vibration etc..Result of the test can be used to effect theory and numerical value
The correctness of model, necessary experiment support is provided for engineering is actual.
Found through being retrieved to existing technical literature, it is single vertical for inclination angle uniform incoming flow condition deep-sea tension type both at home and abroad
Pipe vortex-induced vibration and suppression experimental study are considerably less, realize inclination angle to flow down the maximum difficult point of vortex-induced vibration and suppression experimental study
It is:How experimental rig reasonable in design, simulation standpipe inclination angle incoming effect under vortex-induced vibration behavior.
The content of the invention
The present invention is directed to the single standpipe vortex-induced vibration of inclination angle uniform incoming flow condition deep-sea tension type and its suppression experimental study
Existing difficult point and deficiency, there is provided the experimental rig of single riser vortex excited vibration and vibration suppression, energy under research inclination angle incoming
Enough simulations have the incoming at inclination angle, carry out experimental study to the single standpipe of deep-sea tension type, probe into its vortex-induced vibration characteristic and suppression
Measure, reference and reference are provided for engineering is actual.
In order to solve the above-mentioned technical problem, a kind of inclination angle uniform incoming flow condition deep-sea tension type proposed by the present invention is single vertical
Pipe vortex vibration testing device, including marine riser model, transverse test support, trailer, strain acquirement instrument and computer, institute
The one end for stating marine riser model is provided with first end support meanss, and the other end of the marine riser model is provided with the second end
Support meanss, the tops of the first end support meanss and the second end support meanss respectively with the transverse test support
Both ends connection, the transverse test support is fixed on the bottom of the trailer;The marine riser model includes some
Wire and a thin-wall copper pipe, the external diameter of the wire is 0.3mm, and the wire is 7 core wires, and the external diameter of the thin-wall copper pipe is
8mm, wall thickness 1mm;If from the outer surface of the thin-wall copper pipe successively to be externally provided with the dried layer thermoplastic tube that is closely contacted with each other and
One layer of silicone tube, the foil gauge that multi-disc is used to gather strain, the strain are provided between the thin-wall copper pipe and the thermoplastic tube
Piece is connected by binding post with the wire, one end of the both ends of the wire and the thin-wall copper pipe or respectively with it is described thin
The both ends of wall copper pipe are fixed;One end of the thin-wall copper pipe is connected with the first column joint by pin, the thin-wall copper pipe
The other end is connected with the second column joint by pin;The transverse test support includes subject beam, the subject beam
Two side roof parts be respectively provided with angle scale;The top of the subject beam is provided with channel-section steel, and the trailer support is on channel-section steel;Institute
Stating first end support meanss includes the first support tube of vertical direction, is connected with the top of first support tube horizontally disposed
First angle plate, the bottom of first support tube is connected with the first supporting plate, passes through spiral shell on the inside of first supporting plate
Tether and be connected to first deflector parallel with first supporting plate, the bottom of first deflector is provided with a through hole, institute
State in through hole and be provided with a universal coupling, one end of the universal coupling is fixed on first by universal coupling screw
On fagging, the other end of the universal coupling is connected with the first column joint in the marine riser model;Described second
End support meanss include the second support tube of vertical direction, and horizontally disposed second is connected with the top of second support tube
Angle board, the bottom of second support tube are connected with the second supporting plate, are bolted on the inside of second supporting plate
There is second deflector parallel with second supporting plate, the bottom of second deflector is provided with a rectangle gap, institute
State in rectangle gap and be provided with angle clamp, the angle clamp is provided with a standpipe mounting hole;The experimental rig includes
There are four angle clamps, the angle of the axis and angle clamp thickness direction of the standpipe mounting hole on each angle clamp is respectively
0 degree, 15 degree, 30 degree, 45 degree;The outside of second supporting plate is provided with a pulley, the pulley base of the pulley and second
Pulley base cushion block is provided between fagging, the pulley base cushion block is wedge, is located in second supporting plate under pulley base
Side is respectively equipped with a steel wire rope via;Include three pulley base cushion blocks in the experimental rig, it is oblique on each pulley base cushion block
Angle between face and the second supporting plate contact surface is respectively 15 degree, 30 degree, 45 degree;On the subject beam, positioned at second
The other end that the connection end side of end support meanss is connected with pulling force sensor described in a pulling force sensor is connected with turn
Pulling force stretcher and tension spring;From the second column joint in marine riser model, the steel wire rope through in the second supporting plate
After via steel wire rope is connected with around the other end of pulley to tension spring;The axle of the steel wire rope and the marine riser model
Line is in the same plane;The wire and the pulling force sensor couple with the strain acquirement instrument, the strain acquirement instrument with
The computer connection.
Compared with prior art, the beneficial effects of the invention are as follows:
The present invention is solved under the conditions of the uniform incoming flow of inclination angle with and without the single standpipe of deep-sea tension type of restraining device
In vortex-induced vibration experiment, the arrangement of single standpipe and change the problem of carrying out flow inclination, compensate for the deficiency of academia in this respect, together
When apparatus of the present invention design and produce simply, it is cheap, it is easy for installation, easily promote, can be research inclination angle uniform incoming flow condition
Vortex-induced vibration of marine riser necessary equipment be provided supported.
Brief description of the drawings
Fig. 1 is the structural representation for the single standpipe vortex vibration testing device for not having suppression structure in the present invention;
Fig. 2 is that the thick column joint at the marine riser model both ends for not having to suppress structure in the present invention and thin column joint show
It is intended to;
Fig. 3 is the structural representation with the single standpipe vortex vibration testing device for suppressing structure in the present invention;
Fig. 4 is that the thick column joint at the marine riser model both ends with suppression structure in the present invention and thin column joint show
It is intended to;
Fig. 5 is the structural representation of the first supporting plate 141 shown in Fig. 1;
Fig. 6 is the structural representation of the second deflector 112 shown in Fig. 1;
Fig. 7 is transverse test support structure top view;
Fig. 8 is the right view of transverse test support shown in Fig. 7;
Fig. 9 is the structural representation of angle scale;
Figure 10 is the top view of transverse test support and trailer mutual alignment one;
Figure 11 is the right view of transverse test support shown in Figure 10 and trailer mutual alignment one;
Figure 12-1 transverse tests support and the top view of trailer mutual alignment two;
Figure 12-2 is the top view of transverse test support and trailer mutual alignment one;
Figure 12-3 is the top view of transverse test support and trailer mutual alignment one;
Figure 13-1 is inclination angle schematic diagram between state lower standing tube shown in Figure 12-1 and incoming;
Figure 13-2 is inclination angle schematic diagram between state lower standing tube shown in Figure 12-2 and incoming;
Figure 13-3 is inclination angle schematic diagram between state lower standing tube shown in Figure 12-3 and incoming;
Figure 14-1 is the front view of pulley base cushion block;
Figure 14-2 is the left view of pulley base cushion block shown in Figure 14-1;
Figure 14-3 is the top view of pulley base cushion block shown in Figure 14-1;
Figure 15 is the marine riser model structure schematic diagram with spiral strake restraining device.
In figure:
The end support meanss 3- transverse test supports of 1- marine riser models 2- first, second
4- angle scales 5- the first column joint the second column joints of 6-
7- pin 51- thin-wall copper pipe 9- down tubes
10- universal couplings 111- the first deflector the second deflectors of 112-
12- hog frames 131- the first support tube the second support tubes of 132-
141- the first supporting plate 142- the second supporting plate 15- universal coupling screws
16- pulley 17- steel wire rope 18- deflector fixed screws
19- spring 20- trailer 211- first angle plates
212- second angle plate 22- angle clamp 23- pulley base cushion blocks
24- pulling force stretcher 25- pulling force sensor 27- silicone bands (spiral strake)
Embodiment
Technical solution of the present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in figures 1 and 3, a kind of single riser vortex of inclination angle uniform incoming flow condition deep-sea tension type proposed by the present invention swashs
Vibration testing device, including marine riser model 1, transverse test support 3, trailer, strain acquirement instrument and computer, the sea
One end of foreign riser model 1 is provided with first end support meanss, and the other end of the marine riser model 1 is provided with the second end branch
Support arrangement, the tops of the first end support meanss and the second end support meanss respectively with the transverse test support
Both ends connect, and the transverse test support is fixed on the bottom of the trailer, and the trailer includes dynamical system, brake system
And control system.
The marine riser model 1 can be naked pipe, as shown in Figure 2;Can also be with suppression structure, such as Fig. 4 institutes
Show.As shown in figure 15, if marine riser model 1 is naked pipe, it includes some wires and a thin-wall copper pipe 51, the wire
External diameter is 0.3mm, and the wire is 7 core wires, and the external diameter of the thin-wall copper pipe 51 is 8mm, wall thickness 1mm;From the thin-walled
If the outer surface of copper pipe 51 is successively to being externally provided with the dried layer thermoplastic tube 55 being closely contacted with each other and one layer of silicone tube 56, the thin-walled
The foil gauge 53 that multi-disc is used to gather strain is provided between copper pipe 51 and the thermoplastic tube 55, the foil gauge 53 passes through terminals
It is sub to be connected with the wire, one end of the both ends of the wire and the thin-wall copper pipe 51 or respectively with the thin-wall copper pipe 51
Both ends are fixed;One end of the thin-wall copper pipe 51 is connected with the first column joint 5 by pin 7, the thin-wall copper pipe 51 it is another
One end is connected with the second column joint 6 by pin 7.If marine riser model 1 is with suppression structure, in above-mentioned naked pipe
On the basis of, the silicone band 27 provided with a plurality of helically wire, the horizontal stroke of the silicone band 27 on the outer surface of silicone tube 56
Section is identical with the shape in the cross section of test pipe spiral strake.
As shown in Figure 7 and Figure 8, the transverse test support 3 includes subject beam, two side roof parts of the subject beam
Respectively it is provided with angle scale 4;The top of the subject beam is provided with channel-section steel, and the trailer support is on channel-section steel;
As shown in figures 1 and 3, the first end support meanss include the first support tube 131 of vertical direction, and described
The top of one support tube 131 is connected with horizontally disposed first angle plate 211, and the bottom of first support tube 131 is connected with
First supporting plate 141, the inner side of first supporting plate 141 are bolted parallel with first supporting plate 141
First deflector 111, the bottom of first deflector 111 are provided with a through hole, a universal joint shaft are provided with the through hole
Section 10, one end of the universal coupling 10 is fixed in the first supporting plate by universal coupling screw 15, described universal
The other end of joint 10 is connected with the first column joint 5 in the marine riser model 1;
The second end support meanss include the second support tube 132 of vertical direction, the top of second support tube 132
Portion is connected with horizontally disposed second angle plate 212, and the bottom of second support tube 132 is connected with the second supporting plate 142, institute
The inner side for stating the second supporting plate 142 is bolted second deflector 112 parallel with second supporting plate 142, institute
The bottom for stating the second deflector 112 is provided with a rectangle gap, and angle clamp 22 is provided with rectangle gap, as shown in fig. 6,
The angle clamp 22 is provided with a standpipe mounting hole;Include four angle clamps 22, each angle in the experimental rig
The axis of standpipe mounting hole on clamp 22 and the angle of the thickness direction of angle clamp 22 are respectively 0 degree, 15 degree, 30 degree, 45 degree;
The outside of second supporting plate 142 is provided with a pulley 16, the pulley base and the second supporting plate of the pulley 16
Pulley base cushion block 23 is provided between 142, the pulley base cushion block 23 is wedge, is located at pulley in second supporting plate 142
The lower section of seat is provided with a steel wire rope via;Include three pulley base cushion blocks 23, each pulley base cushion block 23 in the experimental rig
On inclined-plane and the contact surface of the second supporting plate 142 between angle be respectively 15 degree, 30 degree, 45 degree.
Between on the inner side of first support tube 131 and subject beam and the inner side of second support tube 132 and master
Down tube 9 is respectively connected between on body crossbeam;The deflector 112 of first deflector 111 and second is plastic plate, institute
State and be respectively equipped with hog frame 12 on the first deflector 111 and second deflector 112.
A pulling force sensor is connected on the subject beam, positioned at the connection end side with the second end support meanss
25, the other end of the pulling force sensor is connected with pulling force stretcher 24 and tension spring 19 in turn;From the marine riser mould
The second column joint 6 in type, through the steel wire rope via in the second supporting plate 142 after it is another to tension spring around pulley 16
One end is connected with steel wire rope 17;The axis of the steel wire rope 17 and the marine riser model 1 is in the same plane.
In the present invention, the wire and the pulling force sensor couple with the strain acquirement instrument, the strain acquirement instrument
It is connected with the computer.
Making, installation and examination with the single standpipe vortex vibration testing device for suppressing structure in the present invention introduced below
Test process:Before the test, first according to the yardstick of towing basin, the speed of trailer, the concrete condition of operating condition of test and the warp of experiment
Ji property, determine the specific yardstick of marine riser model.According to the yardstick of marine riser model, the yardstick and operating condition of test of trailer
Concrete condition and economy, determine transverse test support 3, the material and yardstick of the first and second end support meanss.
Exemplified by with the marine riser model for suppressing structure, its manufacturing process is as follows:To take external diameter be 8mm, wall thickness 1mm
Thin-wall copper pipe, front and rear relative, four parallel lines opposing upper and lower are marked along the axis direction of thin-wall copper pipe in platform plane,
Determine the paste position of foil gauge.The both ends of thin-wall copper pipe are loaded onto to (more thick the first column joint and (more thin respectively
Second column joint.The oxide layer of strain gauge adhesion position copper pipe surface is removed, pastes foil gauge, front and rear foil gauge is mutually one
Right, upper and lower foil gauge is mutual in a pair, using half-bridge connection, and by binding post connecting wire, wherein, should with thin adhesive tape
Become piece to separate with the filament that binding post connects and copper pipe surface, to realize insulation, appropriate silicon is applied at strain gauge adhesion
Rubber, to reach the purpose of protection and waterproof, draw the wire of each position to the one or both ends of thin-wall copper pipe and with thin adhesive tape
Wire is fixed along copper pipe axis direction, if then dried layer thermoplastic tube (makes in its outer surface and silicone tube on copper pipe outer sheath
Intimate surface contact, in thermoplastic tube outer sheath last layer silicone tube (making for so far completing naked pipe structure).From the left side of pipe
Start, a pitch is divided into several pieces, spiral line position is determined using spiral wire tag locating ring in each position, use
Helix cemented in place ring is bonded three silica gel strips, and processing silicone tube is not bonded the silica gel of silica gel strip position, makes silica gel strip surface
Clean smooth clean and tidy, finally applying appropriate silicon rubber at model both ends prevents model from intaking, so as to form ocean as shown in figure 15
Riser model.
By transverse test support 3, the first and second end support meanss 2 install, and rotate the first and second end branch
Support arrangement 2 make first angle plate 211 at the top of it and second angle plate 212 respectively with the angle scale 4 in transverse test support 3
In corresponding angle it is corresponding, even if the first deflector 111 and the second deflector 112 and direction of flow keeping parallelism.Determine ocean
Spacing between riser model 1, corresponding angle clamp 22 is arranged on to the corresponding rectangle gap of the second deflector 112
In, and the pulley base cushion block 23 of respective angles be arranged on had in the second supporting plate 142 that steel wire rope 17 passes through that side, then
Pulley 16 is arranged on pulley base cushion block 23.
The both ends of marine riser model 1 are fixed in first, second end support meanss 2.The one end of marine riser model 1
Or double-end wire extends to one end or edge respectively of transverse test support 3 along first or the second end support meanss 2
First and second end support meanss 2 extend to the both ends of transverse test support 3.
The above-mentioned marine riser model 1 connected, the end support meanss of transverse test support 3 and first, second are hung
Enter in towing basin, allow its drift to be sling with the loop wheel machine on trailer top to trailer bottom, and make it with trailer be in respective angles
(15 degree, 30 degree, 45 degree are arranged on trailer, as shown in Figure 10, Figure 11, Figure 12-1, Figure 12-2, Figure 12-3.Adjust pulling force tensioning
Device 24 makes end pulling force reach the size needed for operating condition of test.The wire of the one or both ends of transverse test support 3 is as pulling force
The connection of sensor 25 and the strain acquirement instrument of acquisition system, strain acquirement instrument connection computer, computer-internal are provided with phase
The data collection and analysis software answered.
After whole device installs, debugged.After debugging, it can be tried by operating mode and test specification
Test.
It should be noted last that:Above example only to illustrative and not limiting technical scheme, although on
Embodiment is stated the present invention is described in detail, it will be understood by those within the art that:Still can be to the present invention
Modification or equivalent substitution, any modification or local replacement without departing from the spirit and scope of the present invention, it all should cover
Among scope of the presently claimed invention.
Claims (4)
1. a kind of single standpipe vortex vibration testing device of inclination angle uniform incoming flow condition deep-sea tension type, including marine riser model
(1), transverse test support (3), trailer, strain acquirement instrument and computer, it is characterised in that the marine riser model (1)
One end be provided with first end support meanss, the other end of the marine riser model (1) is provided with the second end support meanss, institute
Both ends of the top of first end support meanss and the second end support meanss respectively with the transverse test support are stated to be connected,
The transverse test support is fixed on the bottom of the trailer;
The marine riser model (1) includes some wires and a thin-wall copper pipe (51), and the external diameter of the wire is 0.3mm,
The wire is 7 core wires, and the external diameter of the thin-wall copper pipe (51) is 8mm, wall thickness 1mm;From the thin-wall copper pipe (51)
If outer surface is successively to being externally provided with the dried layer thermoplastic tube (55) being closely contacted with each other and one layer of silicone tube (56), the thin-wall copper pipe
(51) foil gauge (53) that multi-disc is used to gather strain is provided between the thermoplastic tube (55), the foil gauge (53) is by connecing
Line terminals are connected with the wire, one end of the both ends of the wire and the thin-wall copper pipe (51) or respectively with the thin wall type copper
The both ends of pipe (51) are fixed;One end of the thin-wall copper pipe (51) is connected with the first column joint (5) by pin (7), described
The other end of thin-wall copper pipe (51) is connected with the second column joint (6) by pin (7);
The transverse test support (3) includes subject beam, and two side roof parts of the subject beam are respectively provided with angle scale
(4);The top of the subject beam is provided with channel-section steel, and the trailer support is on channel-section steel;
The first end support meanss include the first support tube (131) of vertical direction, the top of first support tube (131)
Portion is connected with horizontally disposed first angle plate (211), and the bottom of first support tube (131) is connected with the first supporting plate
(141) first parallel with first supporting plate (141), is bolted on the inside of first supporting plate (141)
Deflector (111), the bottom of first deflector (111) are provided with a through hole, a universal joint shaft are provided with the through hole
Save (10), one end of the universal coupling (10) is fixed in the first supporting plate by universal coupling screw (15), described
The other end of universal coupling (10) is connected with the first column joint (5) in the marine riser model (1);
The second end support meanss include the second support tube (132) of vertical direction, the top of second support tube (132)
Portion is connected with horizontally disposed second angle plate (212), and the bottom of second support tube (132) is connected with the second supporting plate
(142) second parallel with second supporting plate (142), is bolted on the inside of second supporting plate (142)
Deflector (112), the bottom of second deflector (112) are provided with a rectangle gap, are provided with the rectangle gap
Angle clamp (22), the angle clamp (22) are provided with a standpipe mounting hole;Include four angles in the experimental rig
Clamp (22), the axis of the standpipe mounting hole on each angle clamp (22) are distinguished with the angle of angle clamp (22) thickness direction
For 0 degree, 15 degree, 30 degree, 45 degree;
The outside of second supporting plate (142) is provided with a pulley (16), the pulley base of the pulley (16) and the second support
Pulley base cushion block (23) is provided between plate (142), the pulley base cushion block (23) is wedge, second supporting plate (142)
The upper lower section positioned at pulley base is provided with a steel wire rope via;Include three pulley base cushion blocks (23) in the experimental rig, each
The angle between inclined-plane and the second supporting plate (142) contact surface on pulley base cushion block (23) is respectively 15 degree, 30 degree, 45 degree;
A pulling force sensor (25) is connected with the subject beam, positioned at the connection end side of the second end support meanss,
The other end of the pulling force sensor is connected with pulling force stretcher (24) and tension spring (19) in turn;From in marine riser model
The second column joint (6), through the steel wire rope via in the second supporting plate (142) after around pulley (16) to tension spring
The other end is connected with steel wire rope (17);The axis of the steel wire rope (17) and the marine riser model (1) is in the same plane;
The wire and the pulling force sensor couple with the strain acquirement instrument, and the strain acquirement instrument connects with the computer
Connect.
2. the single standpipe vortex vibration testing device of inclination angle uniform incoming flow condition deep-sea tension type according to claim 1, its
It is characterised by, silicone tube (56) outer surface of the marine riser model (1) is provided with the silicone band of a plurality of helically wire
(27), the cross section of the silicone band (27) is identical with the shape in the cross section of test pipe spiral strake.
3. the single standpipe vortex vibration testing device of inclination angle uniform incoming flow condition deep-sea tension type according to claim 1, its
Be characterised by, on the inner side of first support tube (131) and subject beam between and second support tube (132) inner side
With on subject beam between be respectively connected with down tube (9).
4. the single standpipe vortex vibration testing device of inclination angle uniform incoming flow condition deep-sea tension type according to claim 1, its
Be characterised by, first deflector (111) and the second deflector (112) they are plastic plate, first deflector (111) and
Hog frame (12) is respectively equipped with second deflector (112).
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CN106052987A (en) * | 2016-04-28 | 2016-10-26 | 天津大学 | Device for carrying out active control on marine riser vortex-induced vibration by adopting knocking mode |
CN105806577A (en) * | 2016-04-28 | 2016-07-27 | 天津大学 | Dip angle incoming flow marine riser vortex-induced vibration suppression device in control rod mode |
CN105890857A (en) * | 2016-04-28 | 2016-08-24 | 天津大学 | Marine riser vortex-induced vibration control lever restraint system |
CN105928680A (en) * | 2016-04-28 | 2016-09-07 | 天津大学 | Seabed pipeline vortex-induced vibration experiment apparatus taking spanning soil-pipe interaction into consideration |
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