CN105300635B - Vertical riser incoming marine riser vortex swashs ginseng and swashs coupled vibrations experimental rig - Google Patents
Vertical riser incoming marine riser vortex swashs ginseng and swashs coupled vibrations experimental rig Download PDFInfo
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- CN105300635B CN105300635B CN201510600076.2A CN201510600076A CN105300635B CN 105300635 B CN105300635 B CN 105300635B CN 201510600076 A CN201510600076 A CN 201510600076A CN 105300635 B CN105300635 B CN 105300635B
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Abstract
Swash ginseng the invention discloses a kind of vertical riser incoming marine riser vortex and swash coupled vibrations experimental rig, including marine riser model, the transverse test support for being fixed on trailer bottom, axial force reciprocating apparatus, strain acquirement instrument and computer, steel wire rope is connected between marine riser model and axial force reciprocating apparatus.Axial force reciprocating apparatus includes bearing, motor, connecting rod, slide rail, sliding block, eccentric orfice blind plate, upper lower sheave, motor connection has frequency converter, motor rotates makes sliding block be moved back and forth on slide rail by connecting rod, reciprocating amplitude is the eccentric throw of connecting rod and connecting screw on eccentric orfice blind plate, the change of axial force amplitude is realized by changing eccentric throw, drives tension spring to make stretching motion by steel wire rope.The present invention solves the equipment problem that vertical riser carrys out the experiment of rheology axial force vortex-induced vibration of marine riser, by designing the axial force that simple harmonic quantity can be achieved and change, vertical riser flow field so that experimental condition more conforms to actual ocean engineering operating mode.
Description
Technical field
The present invention relates to a kind of experimental rig of field of ocean engineering, specifically, refers to a kind of hang down
Straight step incoming marine riser vortex swashs the-sharp coupled vibrations experimental rig of ginseng.
Background technology
As deep-sea is moved towards in the exploitation of Marine oil and gas resource, the importance of vertical tube structure progressively highlights.Under action of ocean current
Vortex-induced vibration can occur for marine riser, vortex-induced vibration in the case of deep-sea is to cause riser fatigue to destroy the main reason for.Once
Standpipe is destroyed, and except causing serious economic loss, will also trigger oil accident, and serious marine environment may be caused dirty
Dye and problems of ecological security.
Marine riser top is typically connected with floating platform.With wave heave movement occurs for platform, to riser top ends one
Individual displacement temporal response, causes standpipe axial force with floating motion and generating period changes, so as to cause standpipe in level side
Parametric excitation occurs upwards.Parametric excitation can cause the unstability of standpipe equilbrium position, and the vibration of aggravation standpipe and fatigue are broken
It is bad.
Experimental study is that vortex-induced vibration studies a basic means, available for mechanism, the vibration for disclosing vortex-induced vibration
Characteristic, checking simultaneously correct vortex-induced vibration forecasting procedure etc..On elongated standpipe vortex-induced vibration experimental study, two classes are roughly divided into：
One kind is the vortex induced vibration of slender flexible standpipe experiment carried out in natural water area.Riser model in this kind of experiment is general longer,
Slenderness ratio is formed closest to reality, experiment flow velocity by ship or the dragging of other devices.But this kind of experiment riser model both ends border
The relative flow field that condition is undesirable, is formed outside standpipe is influenceed very by factors such as the manipulation levels of the facilities such as place, sea situation and ship
Greatly, while test costly.Another kind of is the experiment carried out in artificial pond.The test data of acquisition can be whirlpool exciting
Dynamic forecasting model makees benchmark, is compared to the experiment carried out in natural pond, the advantages of artificial basin test：Flow field is easy to control
System, quality are good, and the boundary condition of standpipe easily designs, and can carry out test observation to a variety of vortex-induced vibration influence factors.At this stage,
The model test carried out in artificial pond has been widely applied to vortex-induced vibration of marine riser Study on Problems.
The practical experience of ocean engineering shows：Flow velocity section in the range of from sea level to seabed entire depth is not one
Into constant, such as the deepwater regions of the Gulf of Mexico or South China Sea, mean flow rate is in the range of general 300 meters of top layer
4 to 5 times of the 300-800 rice depth of waters, it is more than 20 times below 800 meters of depth of waters, it is found that the incoming in the range of entire depth
It is stepped incoming.Found through being retrieved to existing technical literature, the stepped incoming marine riser being directed under plumbness
Vortex-induced vibration experiment has been carried out.21st phase in 2005《Journal of Fluids and Structures》Opinion in magazine
Text " Laboratory measurements of vortex-induced vibrations of a vertical tension
Riser in a stepped current " (vertically see stepped inlet flow conditions by single tensioned risers vortex-induced vibration experiment
Survey), devise a set of exquisite experimental rig.A bucket is holded up on the towing basin water surface, bung below the water surface, due to
The reason for atmospheric pressure, there can be water column of the height in 10 meters after being evacuated in bucket, standpipe grows 13.12 meters, and upper end is fixed on
Bucket it is upper, lower end and bottom of pond annex are supported, and bucket is fixed on trailer, and stepped incoming test bar is produced after starting trailer
Part.But the device can not realize the cyclically-varying of standpipe axial force, can not realize vertical riser incoming marine riser vortex swash-
Ginseng swashs coupled vibrations and observed simultaneously.
The content of the invention
The present invention for vertical riser come difficult point existing for rheology axial force vortex-induced vibration of marine riser experimental study and not
Foot, there is provided it have studied a kind of vertical riser incoming marine riser vortex and swash-sharp coupled vibrations the experimental rig of ginseng, being capable of test simulation
Vertical ladder inlet flow conditions, correlation test research work is carried out to the marine riser of axial force simple harmonic quantity change, probes into its whirlpool and swashs
The parametric vibration of genesis mechanism and change axial force induction is vibrated to influencing mechanism of vortex-induced vibration etc., tries hard to carry for engineering is actual
For necessary experiment reference and use for reference.
In order to solve the above-mentioned technical problem, a kind of vertical riser incoming marine riser vortex proposed by the present invention swashs the-sharp coupling of ginseng
Close vibration testing device, including marine riser model, transverse test support, trailer, axial force reciprocating apparatus, strain acquirement instrument
And computer, one end of the marine riser model are provided with first end support meanss, the other end of the marine riser model
Provided with the second end support meanss, the tops of the first end support meanss and the second end support meanss respectively with the horizontal stroke
Connected to the both ends of experiment support, the transverse test support is fixed on the bottom of the trailer；The marine riser mould
Type includes some wires and a thin-wall copper pipe, and the external diameter of the wire is 0.3mm, and the wire is 7 core wires, the thin-walled
The external diameter of copper pipe is 8mm, wall thickness 1mm；If from the outer surface of the thin-wall copper pipe successively to being externally provided with what is be closely contacted with each other
Dried layer heat-shrink tube and one layer of silicone tube, the strain that multi-disc is used to gather strain is provided between the thin-wall copper pipe and the heat-shrink tube
Piece, the foil gauge are connected by binding post with the wire, one end of the both ends of the wire and the thin-wall copper pipe or
The both ends with the thin-wall copper pipe are fixed respectively；One end of the thin-wall copper pipe is connected with the first column joint, institute by pin
The other end for stating thin-wall copper pipe is connected with the second column joint by pin；The transverse test support includes subject beam,
The top of the subject beam is provided with channel-section steel, and the trailer support is on channel-section steel；The trailer is provided with and marine riser model
The axial force reciprocating apparatus of one end connection；The axial force reciprocating apparatus include bearing, motor, connecting rod, slide rail, sliding block, partially
Heart hole blind plate, upper sheave and lower pulley, the motor are arranged on one end of bearing, and the slide rail is arranged in bearing
Portion, the sliding block are assemblied on the slide rail, and the upper sheave and lower pulley are arranged at the other end of the bearing, institute
State eccentric orfice blind plate to be arranged on the output shaft of motor, the eccentric orfice blind plate is provided with the bias of multiple different eccentric positions
Hole, one end of the connecting rod are provided with radial bars, and the radial bars are plugged in one of eccentric orfice, the connecting rod it is another
One end is connected with the sliding block；The first end support meanss include the first support tube of vertical direction, first support
The bottom of pipe is connected with the first supporting plate, has been bolted on the inside of first supporting plate and has been put down with first supporting plate
The first capable deflector, the bottom of first deflector are provided with a through hole；A universal coupling is provided with through hole, it is described
One end of universal coupling is fixed in the first supporting plate by universal coupling screw, the other end of the universal coupling with
The first column joint connection in the marine riser model；The second end support meanss include second of vertical direction
Stay tube, the bottom of second support tube are connected with the second supporting plate, have been bolted on the inside of second supporting plate
Second deflector parallel with second supporting plate, the bottom of second deflector are provided with a Pipe installing through hole, institute
The outside for stating the second supporting plate is provided with a pulley, and the lower section that the pulley is located in second supporting plate is provided with a steel wire rope
Via；Streamline radome fairing is fixed with the inside of second deflector, the streamlined radome fairing covers the ocean and stood
The shaft part of tube model one end；Second column joint connecting steel wire ropes of the marine riser model, the steel wire penetrating second
Pulling force stretcher, tension spring are sequentially connected after the pulley on the outside of second supporting plate is bypassed after steel wire rope via on fagging
And pulling force sensor, it is ultimately connected on the sliding block in the axial force reciprocating apparatus；The steel wire rope and the marine riser
The axis of model is in the same plane；The output axis center of the motor, the face symmetrical above and below of the connecting rod, the sliding block
Face symmetrical above and below is located at same level height, the cunning of the upper sheave with the top edge of the pulley groove of the upper sheave
Point-blank, the motor connection has frequency converter, the motor for wheel groove edge and the pulley groove edge of the lower pulley
Rotate, the sliding block is moved back and forth on the slide rail by the connecting rod, reciprocating amplitude is the connecting rod
With the eccentric throw of link position point on the eccentric orfice blind plate, so as to realize the change of axial force amplitude；In the past of the sliding block
In multiple motion process, the tension spring is driven to make stretching motion by steel wire rope；The wire and the pulling force sensor with
The strain acquirement instrument connection, the strain acquirement instrument are connected with the computer.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention solves the equipment problem that vertical riser carrys out the experiment of rheology axial force vortex-induced vibration of marine riser, by setting
The axial force of simple harmonic quantity change, vertical riser flow field can be achieved in meter so that experimental condition more conforms to actual ocean engineering operating mode.This
The Parametric excitation coupling of vortex-induced vibration-change axial force can be achieved in invention, while the design of apparatus of the present invention is simple, installation and debugging side
Just, it is cheap, it is deep sea vertical pipe vortex-induced vibration and the essential device measure of parametric vibration experimental study, compensate for science
Boundary lacks the blank of vertical riser incoming simple harmonic quantity change axial force vortex-induced vibration of marine riser rig for testing, has important popularization
Application value and scientific meaning.
Brief description of the drawings
Fig. 1 is the structural representation for the 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 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 first supporting plate 141 shown in Fig. 1, the structural representation of the second supporting plate 142；
Fig. 6 is the structural representation of the second deflector 112 and streamlined radome fairing 27 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 top view of transverse test support and trailer mutual alignment；
Figure 10 is the right view of transverse test support shown in Fig. 9 and trailer mutual alignment；
Figure 11 is the front view of axial force reciprocating apparatus；
Figure 12 is the top view of axial force reciprocating apparatus
Figure 13-1 is the end direction view of streamlined radome fairing in the present invention；
Figure 13-2 is the top view of streamlined radome fairing shown in Figure 13-1；
Figure 13-3 is the view of streamlined radome fairing backwater one side shown in Figure 13-1；
Figure 13-4 is that streamlined radome fairing shown in Figure 13-1 meets water the view of one side；
Figure 14 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- sliding blocks 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- tension spring 20- trailer 21- slide rails
22- upper sheave 23- lower pulley 24- pulling force stretchers
The streamlined radome fairing 28- coaming plates of 25- pulling force sensors 27-
29- outers plate 30- silicone band 31- connecting rods
32- motors 33- becomes axial force mechanism bearing 34- eccentric orfice blind plates
53- foil gauge 55- heat-shrink tube 56- silicone tubes
Embodiment
Technical solution of the present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, described is specific
Only the present invention is explained for embodiment, is not intended to limit the invention.
Swash-sharp coupled vibrations the experimental rig of ginseng as shown in figure 1, the present invention is a kind of vertical riser incoming marine riser vortex,
It is described including marine riser model 1, transverse test support 3, trailer, axial force reciprocating apparatus, strain acquirement instrument and computer
One end of marine 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
Support meanss, the tops of the first end support meanss and the second end support meanss respectively with the transverse test support
3 both ends connection, as shown in Figure 9 and Figure 10, the transverse test support 3 is fixed on the bottom of the trailer, the axial direction
Power reciprocating apparatus is arranged on trailer edge, is connected by steel wire rope 17 with marine riser model 1.
The marine riser model 1 both can be naked pipe, as shown in Figure 2；Can also be arranged with suppression structure i.e. spiral
Plate, as shown in Figure 4；If the marine riser model 1 is naked pipe, its structure is：Including some wires and a thin-wall copper pipe 51,
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 51 is 8mm, wall thickness 1mm；
If from the outer surface of the thin-wall copper pipe 51 successively to being externally provided with the dried layer heat-shrink tube 55 being closely contacted with each other and one layer of silicone tube
56, the foil gauge 53 that multi-disc is used to gather strain, the foil gauge are provided between the thin-wall copper pipe 51 and the heat-shrink tube 55
53 are connected by binding post with the wire, one end of the both ends of the wire and the thin-wall copper pipe 51 or respectively with it is described
The both ends of thin-wall copper 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 thin
The other end of wall copper pipe 51 is connected with the second column joint 6 by pin 7, as shown in Figure 2；If with structure is suppressed, then
On the basis of above-mentioned naked pipe structure, a plurality of helically line is provided with the outer surface of silicone tube 56 of the marine riser model 1
The silicone band 30 of shape, the cross section of the silicone band 30 is identical with the shape in the cross section of test pipe spiral strake, such as Fig. 4 institutes
Show.
The transverse test support 3 includes subject beam, and the top of the subject beam is provided with channel-section steel, the trailer branch
Support is on channel-section steel；As shown in Figure 7 and Figure 8.
The first end support meanss include the first support tube 131 of vertical direction, the bottom of first support tube 131
Portion is connected with the first supporting plate 141, and the inner side of first supporting plate 141 has been bolted and first supporting plate
141 the first parallel deflectors 111, the bottom of first deflector 111 are provided with a through hole, one are provided with the through hole
Universal coupling 10, one end of the universal coupling 10 are fixed in the first supporting plate by universal coupling screw 15, institute
The other end of universal coupling 10 is stated to be 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 the other end of the subject beam, applies diagonal brace in the plane that the second support tube and transverse test support form
Pipe 9, i.e., on the inner side of second support tube 132 and subject beam between be connected with down tube 9；Second support tube
132 bottom is connected with the second supporting plate 142, and the inner side of second supporting plate 142 has been bolted and described second
The second parallel deflector 112 of supporting plate 142, second deflector 112 are plastic plate, are set on second deflector 112
There is hog frame 12, be fixed together between second supporting plate 142, the second deflector 112 and hog frame 12 using screw.Institute
The bottom for stating the second deflector 112 is provided with a Pipe installing through hole, and the outside of second supporting plate 142 is provided with a pulley
16, the lower section in second supporting plate 142 positioned at the pulley is provided with a steel wire rope via.In the present invention, first, second
The material of fagging 141 and 142 is steel plate, and does triangle reinforcement with angle bar, as shown in Figure 5.
The inner side of second deflector 112 is fixed with streamline radome fairing 27, as shown in figures 1 and 3, the streamline
Type radome fairing covers the shaft part of the one or both ends of marine riser model 1；Such as Figure 13-1, Figure 13-2, Figure 13-3 and Figure 13-4
Shown, the streamlined radome fairing 27 includes streamlined coaming plate 28 and is arranged on the outer plate 29 of the one end of coaming plate 28, the outer
Plate 29 is provided with bolt through-hole, as shown in fig. 6, being connected between the deflector 112 of the streamlined radome fairing 27 and second using bolt
Connect, the streamlined radome fairing 27 can greatly reduce in trailer dragging process the resistance of stepped incoming bringing device and emerging
Ripple.
On the subject beam with the second cylinder of the marine riser model 1 of the connection end bottom of the second end support meanss
The connecting steel wire ropes of joint 6, after the steel wire penetrating supporting plate around pulley be sequentially connected pulling force stretcher 24, tension spring 19,
Pulling force sensor 25 is finally connected with axial force reciprocating apparatus；The axis of the steel wire rope 17 and the marine riser model 1 exists
In same plane；
As is illustrated by figs. 11 and 12, the axial force reciprocating apparatus is arranged on the edge of trailer 20, and the axial force is reciprocal
Device includes bearing 33, motor 32, connecting rod 31, slide rail 21, sliding block 4, eccentric orfice blind plate 34, upper sheave 22 and lower pulley
23, the motor 32 is arranged on one end of bearing 33, and the slide rail 21 is arranged on the middle part of bearing 33, and the sliding block 4 is assemblied in
On the slide rail 21, the upper sheave 22 and lower pulley 23 are arranged at the other end of the bearing 33, the eccentric orfice
Blind plate 34 is arranged on the output shaft of motor 32, and the eccentric orfice blind plate 34 is provided with the eccentric orfice of multiple different eccentric positions,
The one end of connecting rod 31 connection eccentric orfice blind plate 34, i.e., one end of described connecting rod 31 is provided with radial bars, and the radial bars are inserted
It is connected in one of eccentric orfice, the other end of the connecting rod 31 is connected with the sliding block 4；Sliding block 4 is placed in slide rail 21, sliding
One end connecting steel wire ropes 17 of block 4, steel wire rope 17 are extended downwardly around entering in the groove of lower pulley 23 around entering in the groove of upper sheave 22
It is connected with pulling force sensor 25, tension spring 19, pulling force stretcher 24, is finally connected with marine riser model 1.Above-mentioned motor 32
Axis center, the center of sliding block 4, the top edge of the groove of upper sheave 22 are located at same level height, and the groove edge of upper sheave 22 is with
Point-blank motor 32 connects frequency converter connection power supply to the groove inward flange of portion's pulley 23, changes supply voltage by frequency converter
Frequency with the rotating speed of regulation motor 32 to needs, can meet the frequency of axial force change, and eccentric orfice blind plate 34 is apart from the axle of motor 32
Center relevant position open screw hole, the one end of connecting rod 31 are screwed into screw hole by screw, and motor 32 rotates, and is made by connecting rod 31
Sliding block 4 moves back and forth on slide rail 21, and sliding block 4 drives tension spring 19 to make stretching motion by steel wire rope 17, reciprocating
Amplitude is the eccentric throw of screw hole, and the change of axial force amplitude is realized by changing eccentric throw；The wire and the pulling force
Sensor couples with the strain acquirement instrument, and the strain acquirement instrument is connected with the computer.
The making of the present embodiment device introduced below and installation process：Before the test, first dragged according to the yardstick of towing basin
The speed of car 20, the concrete condition of operating condition of test and the economy of experiment, obtain the specific yardstick of marine riser model 1.According to
The yardstick of marine riser model 1, the yardstick of trailer 20 and the concrete condition of operating condition of test and economy, determine transverse test branch
Hold frame 3, first, second end support meanss 2, the material and yardstick of streamlined radome fairing 27.
Make marine riser model 1, transverse test support 3, first, second end support meanss 2, streamlined radome fairing
27, each instrument and equipment outsourcing of measuring and analysis system.
As shown in figure 14, exemplified by with the marine riser model for suppressing structure, its manufacturing process is as follows：First in platform
It is relative before and after being marked in plane along copper pipe axis direction, four parallel lines opposing upper and lower, determine the paste position of foil gauge 53.Will
Thick column joint and thin column joint are loaded onto respectively in the both ends of thin-wall copper pipe 51.Remove the oxygen of the paste position copper pipe surface of foil gauge 53
Change layer, paste foil gauge 53, mutually in a pair, upper and lower foil gauge mutually in a pair, using half-bridge connection, and passes through front and rear foil gauge
Binding post connecting wire, wherein separated foil gauge with the filament that binding post connects and copper pipe surface with thin adhesive tape,
To realize insulation, appropriate silicon rubber is applied at strain gauge adhesion, to reach the purpose of protection and waterproof, draws the wire of each position
Fixed to copper pipe both ends and with thin adhesive tape by wire along copper pipe axis direction, if the then dried layer heat-shrink tube on copper pipe outer sheath
(its outer surface is in close contact with silica gel pipe internal surface), in the outer sheath last layer silicone tube 56 of heat-shrink tube 55 (if naked pipe knot
Structure, so far form the marine riser model), since on the left of pipe, a pitch is divided into several pieces, in each position
Put and determine spiral line position using spiral wire tag locating ring, three silica gel strips, place are bonded using helix cemented in place ring
Reason silicone tube is not bonded the silica gel of silica gel strip position, makes silica gel strip surface clean smooth clean and tidy, the silicone band 30 of bonding represents whirlpool
Spiral strake in excited vibration suppression, finally applying appropriate silicon rubber at model both ends prevents model from intaking.
By transverse test support 3, first, second end support meanss 2 are installed, and streamlined radome fairing 27 is arranged on
On one of deflector or two deflectors, Fig. 1 and Fig. 3 are illustrated that and respectively install streamline on two deflectors
Type radome fairing 27, the one or both ends of marine riser model 1 draw wire along first the second end support meanss 2 or respectively
The one or both ends of transverse test support 3 are extended to along first, second end support meanss 2.By whole experimental rig to dragging
The bottom of car 20, experimental rig is sling with loop wheel machine, and installed.According to the eccentric orfice for the amplitude selection suitable distance for becoming axial force
Connected with the radial bars for being connected boom end, such as：The radial bars are screws, and eccentric orfice is screw hole, the eccentric throw of its eccentric orfice
It is exactly amplitude, connecting rod is installed in this screw hole by screw, eccentric orfice blind plate is gone into equilbrium position, i.e. screw hole position
In peak or minimum point, now sliding block 4 is located at reciprocating centre position, reaches pulling force by adjusting pulling force stretcher
Average tension value, by the frequency of the supply voltage of frequency converter regulation motor 32, motor 32 is reached the rotating speed needed for operating mode, meet
The frequency requirement of axial force change.Pulling force sensor 25 and wire are connected with deformeter, deformeter connection computer.Trailer starts
When, fluid is static relative to riser model in streamlined sleeve coaming plate 28, has flow of fluid in the middle part of model, that is, realizes ladder
Stream.
All appts device installs rear, it is necessary to be debugged., can be by operating mode and test specification after debugging
Tested.
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 (5)
1. a kind of vertical riser incoming marine riser vortex swashs the-sharp coupled vibrations experimental rig of ginseng, it is characterised in that is stood including ocean
Tube model (1), transverse test support (3), trailer (20), strain acquirement instrument and computer, the marine riser model (1)
One end is provided with first end support meanss, and the other end of the marine riser model (1) is provided with the second end support meanss, described
The top of first end support meanss and the second end support meanss connects with the both ends of the transverse test support (3) respectively
Connect, the transverse test support (3) is fixed on the bottom of the trailer (20)；
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 heat-shrink 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 heat-shrink 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 the top of the subject beam is provided with channel-section steel, the trailer (20)
It is supported on channel-section steel；The trailer (20) is provided with the axial force reciprocating apparatus being connected with marine riser model (1) one end；
The axial force reciprocating apparatus includes bearing (33), motor (32), connecting rod (31), slide rail (21), sliding block (4), bias
Hole blind plate (34), upper sheave (22) and lower pulley (23), the motor (32) are arranged on one end of bearing (33), the cunning
Rail (21) is arranged on the middle part of bearing (33), and the sliding block (4) is assemblied on the slide rail (21), the upper sheave (22) and
Lower pulley (23) is arranged at the other end of the bearing (33), and the eccentric orfice blind plate (34) is arranged on the defeated of motor (32)
On shaft, the eccentric orfice blind plate (34) is provided with the eccentric orfice of multiple different eccentric positions, one end of the connecting rod (31)
Provided with radial bars, the radial bars are plugged in one of eccentric orfice, the other end and the sliding block of the connecting rod (31)
(4) connect；
The first end support meanss include the first support tube of vertical direction, and the bottom of first support tube is connected with
One supporting plate, first deflector parallel with first supporting plate is bolted on the inside of first supporting plate,
The bottom of first deflector is provided with a through hole；It is provided with a universal coupling in through hole, the one of the universal coupling
End is fixed in the first supporting plate by universal coupling screw, the other end of the universal coupling and the marine riser mould
The first column joint (5) connection in type (1)；
The second end support meanss include the second support tube of vertical direction, and the bottom of second support tube is connected with
Two supporting plates, second deflector parallel with second supporting plate is bolted on the inside of second supporting plate,
The bottom of second deflector is provided with a Pipe installing through hole, and the outside of second supporting plate is provided with a pulley
(16), the lower section in second supporting plate positioned at the pulley (16) is provided with a steel wire rope via；Second deflector
Inner side is fixed with streamline radome fairing (27), and the streamlined radome fairing (27) covers described marine riser model (1) one end
Shaft part；
The second column joint (6) connecting steel wire ropes (17) of the marine riser model (1), the steel wire rope (17) pass through second
After steel wire rope via on fagging around be sequentially connected after the pulley (16) on the outside of second supporting plate pulling force stretcher (24),
Tension spring (19) and pulling force sensor (25), it is ultimately connected on the sliding block (4) in the axial force reciprocating apparatus；The steel
The axis of cord (17) and the marine riser model (1) is in the same plane；
The output axis center of the motor (32), the face symmetrical above and below of the connecting rod (31), the sliding block (4) it is symmetrical above and below
Face is located at same level height, the cunning of the upper sheave (22) with the top edge of the pulley groove of the upper sheave (22)
Point-blank, the motor (32) is connected with frequency converter for wheel groove edge and the pulley groove edge of the lower pulley (23),
The motor (32) rotates, and the sliding block (4) is moved back and forth on the slide rail (21) by the connecting rod (31), back and forth
The amplitude of motion is the connecting rod (31) and the eccentric throw of link position point on the eccentric orfice blind plate (34), so as to realize axle
Change to power amplitude；In the reciprocatory movement of the sliding block (4), the tension spring is driven by steel wire rope (17)
(19) stretching motion is made；
The wire and the pulling force sensor couple with the strain acquirement instrument, and the strain acquirement instrument connects with the computer
Connect.
2. vertical riser incoming marine riser vortex swashs the-sharp coupled vibrations experimental rig of ginseng according to claim 1, its feature exists
In silicone tube (56) outer surface of the marine riser model (1) is provided with the silicone band (30) of a plurality of helically wire, described
The cross section of silicone band (30) is identical with the shape in the cross section of test pipe spiral strake.
3. vertical riser incoming marine riser vortex swashs the-sharp coupled vibrations experimental rig of ginseng according to claim 1, its feature exists
In, on the inner side of first support tube (131) and subject beam between and second support tube (132) inner side and main body
Down tube (9) is respectively connected between on crossbeam.
4. vertical riser incoming marine riser vortex swashs the-sharp coupled vibrations experimental rig of ginseng according to claim 1, its feature exists
In second deflector is plastic plate, and second deflector is provided with hog frame (12).
5. vertical riser incoming marine riser vortex swashs the-sharp coupled vibrations experimental rig of ginseng according to claim 1, its feature exists
In the streamlined radome fairing (27) includes streamlined coaming plate (28) and is arranged on the outer plate (29) of coaming plate (28) one end, institute
State outer plate (29) and be provided with bolt through-hole, bolt is used between the streamlined radome fairing (27) and the second deflector (112)
Connection.
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| CN111896999B (en) * | 2019-05-06 | 2023-11-28 | 中国石油天然气集团有限公司 | Vibrator and vibration signal control method |
| CN113267305B (en) * | 2021-06-11 | 2024-04-12 | 广东海洋大学 | Riser vortex-induced vibration response testing device and application method thereof |
| CN116908004A (en) * | 2023-09-13 | 2023-10-20 | 山西潇河建筑产业有限公司 | Test evaluation method for mechanical property and usability of rotary stair |
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| JP4155354B2 (en) * | 2003-09-16 | 2008-09-24 | Ｉｍｖ株式会社 | Multi-axis vibration test equipment |
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