CN105157940B - The single standpipe vortex vibration testing device of inclination angle ladder inlet flow conditions deep-sea tension type - Google Patents
The single standpipe vortex vibration testing device of inclination angle ladder inlet flow conditions deep-sea tension type Download PDFInfo
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- CN105157940B CN105157940B CN201510400107.XA CN201510400107A CN105157940B CN 105157940 B CN105157940 B CN 105157940B CN 201510400107 A CN201510400107 A CN 201510400107A CN 105157940 B CN105157940 B CN 105157940B
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Abstract
The invention discloses a kind of single standpipe vortex vibration testing device of inclination angle ladder inlet flow conditions 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, and the shaft part of marine riser model one end is connected provided with streamlined radome fairing, wire and pulling force sensor with strain acquirement instrument.The achievable large Reynold number of the present invention, the deep sea vertical pipe vortex-induced vibration test observation of big L/D ratio, the design of apparatus of the present invention is simple simultaneously, installation and debugging are convenient, it is cheap, it is the essential device measure of deep sea vertical pipe vortex-induced vibration experimental study, the blank that academia lacks the single standpipe vortex-induced vibration rig for testing of the stepped inlet flow conditions deep-sea tension type in inclination angle is compensate for, there is important application value and scientific meaning.
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 experimental rig of the stepped inlet flow conditions deep-sea tensioned risers beam vortex-induced vibration in angle.
Background technology
Riser systems are indispensable key components in deep-sea oil mining system.Standpipe be 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 is entered to deep-sea
Army, the operating water depth of standpipe is also increasing, and in deepwater regions, wave and sea ship motion damage gradually to caused by standpipe
Weaken, but ocean current becomes the principal element for causing standpipe to damage.The effect depth of water scope of ocean current is very big, when ocean current is by ocean
During standpipe, standpipe trailing edge will produce alternate vortex shedding, when vortex shedding frequency is close with the standpipe natural frequency of vibration, standpipe
Vibration will force vortex shedding frequency to be fixed near the standpipe natural frequency of vibration, so as to occur " to lock " phenomenon.Other marine riser
It is not separate operaton, in the engineer applied of reality, more standpipes can form vertical tube common operational, therefore probe into more and stand
Pipe vortex-induced vibration has important theory and realistic meaning.
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.Especially for the situation of vertical tube, inclination angle uniform incoming flow condition deep sea vertical pipe beam vortex-induced vibration
Characteristic is also unknown.
Study the most reliable and maximally effective of the stepped inlet flow conditions deep-sea tensioned risers beam vortex-induced vibration phenomenon in inclination angle
Means are model tests., can be than more comprehensively observing vortex-induced vibration phenomenon, principal character and incoming by model test
Inclination angle on influence caused by vortex-induced vibration, obtain more reliable result of the test and come that effect is theoretical and the precision of numerical model.
Accumulated experience for engineering is actual.In the ocean engineering environment of reality, not only standpipe is axially and incoming vertical direction has a constant inclination
Angle, at the same from sea level to seabed entire depth in the range of flow velocity section be not it is unalterable, such as the Gulf of Mexico or
The deepwater regions of person's South China Sea, mean flow rate is 4 to 5 times of the 300-800 rice depth of waters in the range of general 300 meters of top layer, is
More than 20 times below 800 meters of depth of waters, it is found that the incoming in the range of entire depth is the stepped incoming at inclination angle.Through pair
Existing technical literature retrieval is found, both at home and abroad for the tensioned risers beam vortex-induced vibration experimental study of inclination angle inlet flow conditions deep-sea
It is considerably less.The single standpipe vortex-induced vibration experiment of stepped incoming being directed under aclinal plumbness has been carried out.2005
21st phase《Journal of Fluids and Structures》Paper " Laboratory measurements in magazine
of vortex-induced vibrations of a vertical tension riser in a stepped
Current " (stepped inlet flow conditions vertically single tensioned risers vortex-induced vibration test observation), devises a set of exquisite examination
Experiment device.A bucket is holded up on the towing basin water surface, bung is below the water surface, due to atmospheric pressure, is pumped into bucket
There can be water column of the height in 10 meters after vacuum, standpipe grows 13.12 meters, and upper end is fixed on the upper of bucket, and lower end is attached with bottom of pond
Part is supported, and bucket is fixed on trailer, and stepped incoming experimental condition is produced after starting trailer.But the device can not be realized
The stepped inlet flow conditions at inclination angle.
The content of the invention
The present invention is existing for the single standpipe vortex-induced vibration experimental study of the stepped inlet flow conditions deep-sea tension type in inclination angle
Difficult point and deficiency, there is provided the stepped inlet flow conditions standpipe vortex-induced vibration in research inclination angle and the experimental rig of vibration suppression, can
The stepped incoming at test simulation inclination angle, correlation test research work is carried out to deep-sea tensioned risers, probes into its vortex-induced vibration
Genesis mechanism and carry out the influence of flow inclination to vortex-induced vibration etc., necessary experiment reference is provided and used for reference for engineering is actual.
In order to solve the above-mentioned technical problem, a kind of inclination angle ladder inlet flow conditions 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；It is logical
A universal coupling is provided with hole, one end of the universal coupling is fixed on the first supporting plate by universal coupling screw
On, the other end of the universal coupling is connected with the first column joint in the marine riser model；The second end
Support meanss include the second support tube of vertical direction, and horizontally disposed second angle is connected with the top of second support tube
Plate, the bottom of second support tube are connected with the second supporting plate, be bolted on the inside of second supporting plate with
The second parallel deflector of second supporting plate, the bottom of second deflector are provided with a rectangle gap, rectangle
Angle clamp is provided with gap, the angle clamp is provided with a standpipe mounting hole；Include four angles in the experimental rig
Clamp is spent, the axis of standpipe mounting hole on each angle clamp and the angle of angle clamp thickness direction are respectively 0 degree, 15
Spend, 30 degree, 45 degree；The outside of second supporting plate is provided with a pulley, the pulley base of the pulley and the second supporting plate it
Between be provided with pulley base cushion block, the pulley base cushion block is wedge, and the pulley base of the pulley is located in second supporting plate
Lower section be provided 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；It is fixed with the inside of second deflector
Streamline radome fairing, the streamlined radome fairing cover the shaft part of described marine riser model one end；On the subject beam,
A pulling force sensor, the other end of the pulling force sensor are connected with positioned at the connection end side with the second end support meanss
It is connected with pulling force stretcher and tension spring in turn；The second column joint from the marine riser model, through second
After steel wire rope via on fagging steel wire rope is connected with around the other end of pulley to tension spring；The steel wire rope and the sea
The axis of foreign riser model is in the same plane；The wire and the pulling force sensor are connected with the strain acquirement instrument, institute
Strain acquirement instrument is stated to be connected with the computer.
Compared with prior art, the beneficial effects of the invention are as follows：
The equipment that the present invention solves the single standpipe vortex-induced vibration experiment of the stepped inlet flow conditions deep-sea tension type in inclination angle is difficult
Topic, it be can be achieved by design come flow inclination and stepped flow field so that experimental condition more conforms to actual ocean engineering operating mode.This
Large Reynold number, the deep sea vertical pipe vortex-induced vibration test observation of big L/D ratio, while the design letter of apparatus of the present invention can be achieved in invention
Single, installation and debugging are convenient, cheap, are the essential device measures of deep sea vertical pipe vortex-induced vibration experimental study, compensate for
Academia lacks the blank of the single standpipe vortex-induced vibration rig for testing of the stepped inlet flow conditions deep-sea tension type in inclination angle, has important
Application value and scientific meaning.
Brief description of the drawings
Fig. 1 is the structural representation for the vertical tube 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 vertical tube 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 first, second supporting plate 14 shown in Fig. 1；
Fig. 6 is the structural representation of deflector 11 shown in Fig. 1 and streamlined radome fairing 27；
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 three；
Figure 12-3 is the top view of transverse test support and trailer mutual alignment four；
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 cushion block；
Figure 14-2 is the left view of pulley cushion block shown in Figure 14-1；
Figure 14-3 is the top view of pulley cushion block shown in Figure 14-1；
Figure 15-1 is the end direction view of streamlined radome fairing in the present invention；
Figure 15-2 is the top view of streamlined radome fairing shown in Figure 15-1；
Figure 15-3 is the view of streamlined radome fairing backwater one side shown in Figure 15-1；
Figure 15-4 is that streamlined radome fairing shown in Figure 15-1 meets water the view of one side；
Figure 16 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
The deflector 12- hog frames of 10- universal couplings 11- first, second
The supporting plate 15- universal coupling screws of first, second support tube 14- of 13- first, second
16- pulley 17- steel wire rope 18- deflector fixed screws
19- spring 20- trailer 21- angle boards
22- angle clamp 23- pulley cushion block 24- pulling force stretchers
The streamlined radome fairing 28- coaming plates of 25- pulling force sensors 27-
29- outers plate 30- silicone bands
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.
A kind of as shown in figure 1, single standpipe vortex-induced vibration experiment dress of inclination angle ladder inlet flow conditions deep-sea of the invention tension type
Put, including marine riser model 1, transverse test support 3, trailer, 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, 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 both can be naked pipe, as shown in Figure 2；Can also be i.e. by silica gel with suppression structure
Spiral strakes with 30 compositions, as shown in Figure 4；If the marine riser model 1 is naked pipe, its structure is：Led including some
Line and a thin-wall copper pipe 51, the external diameter of the wire are 0.3mm, and the wire is 7 core wires, the external diameter of the thin-wall copper pipe 51
For 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 thermoplastic that is closely contacted with each other
Pipe 55 and one layer of silicone tube 56, the strain that multi-disc is used to gather strain is provided between the thin-wall copper pipe 51 and the thermoplastic tube 55
Piece 53, the foil gauge 53 are connected by binding post with the wire, the both ends of the wire and the thin-wall copper pipe 51
One end or both ends with the thin-wall copper pipe 51 are fixed respectively；One end of the thin-wall copper pipe 51 is connected with first by pin 7
Column joint 5, the other end of the thin-wall copper pipe 51 is connected with the second column joint 6 by pin 7, as shown in Fig. 2 and Figure 16；
If with structure is suppressed, then on the basis of above-mentioned naked pipe structure, in the appearance of silicone tube 56 of the marine riser model 1
Face is provided with the silicone band 30 of a plurality of helically wire, and the cross section of the silicone band 30 is cross-section with test pipe spiral strake
The shape in face is identical, as shown in Fig. 4 and Figure 16.
The transverse test support 3 includes subject beam, and two side roof parts of the subject beam are respectively provided with angle
Disk 4, the structure of angle scale is as shown in figure 9, the top of the subject beam is provided with channel-section steel, and the trailer support is on channel-section steel；Such as
Shown in Fig. 7 and Fig. 8.
The first end support meanss include the first support tube 13 of vertical direction, the top of first support tube 13
It is connected with horizontally disposed first angle plate 21, the bottom of first support tube 13 is connected with the first supporting plate 14, and described
The inner side of one supporting plate 14 is bolted first deflector 11 parallel with first supporting plate 14, and described first leads
The bottom of flowing plate 11 is provided with a through hole, is provided with a universal coupling 10 in the through hole, and the one of the universal coupling 10
End is fixed in the first supporting plate by universal coupling screw 15, and the other end and the ocean of the universal coupling 10 are stood
The first column joint 5 in tube model 1 connects.
The second end support meanss include the second support tube 13 of vertical direction, the top of second support tube 13
It is connected with horizontally disposed second angle plate 21, the bottom of second support tube 13 is connected with the second supporting plate 14, and described
The inner side of two supporting plates 14 is bolted second deflector 11 parallel with second supporting plate 14, and described second leads
The bottom of flowing plate 11 is provided with a rectangle gap, is provided with angle clamp 22 in rectangle gap, is set on the angle clamp 22
There is a standpipe mounting hole；Include four angle clamps 22 in the experimental rig, the standpipe installation on each angle clamp 22
The axis in hole and the angle of the thickness direction of angle clamp 22 are respectively 0 degree, 15 degree, 30 degree, 45 degree.
First supporting plate is identical with the structure of the second supporting plate, as shown in Figure 5.
First angle plate, second angle plate are identical with the structure of angle scale, in order that deflector 11 all the time with direction of flow
It is parallel, it is necessary to adjust the position of angle board 21 and angle scale 4.Pass through the angle of first angle plate or second angle plate relatively below
The mutual alignment relation of relative position can adjustment transverse test support and trailer direction of travel between scale 4, when next
When the vertical direction of stream and the axial inclination of standpipe are 0 degree, transverse test support 3 is vertical with trailer 20 to be fixed, as Figure 10 with
Shown in Figure 11；When the vertical direction of incoming and the axial inclination of standpipe are 15 degree, transverse test support 3 is in 15 degree with trailer 20
Angle is fixed, such as Figure 12-1；When the vertical direction of incoming and the axial inclination of standpipe are 30 degree, transverse test support 3 and trailer
20 fix in 30 degree of angles, such as Figure 12-2；When the inclination angle of incoming and standpipe is 45 degree, transverse test support 3 is in trailer 20
45 degree of angles are fixed, such as Figure 12-3.Also determined that while angle between adjustment transverse test support 3 and trailer 20 standpipe with
Inclination angle between incoming, when incoming vertical direction and standpipe axial inclination be 0 degree when, angle board 21 and angle scale 4 should be just
It is good to overlap；When the vertical direction of incoming and the axial inclination of standpipe are 15 degree, the angle between angle board 21 and angle scale 4 should
For 15 degree；When the vertical direction of incoming and the axial inclination of standpipe are 30 degree, the angle between angle board 21 and angle scale 4 should
For 30 degree；When the vertical direction of incoming and the axial inclination of standpipe are 45 degree, the angle between angle board 21 and angle scale 4 should
For 45 degree.Such as Figure 13-1, Figure 13-2 and Figure 13-3, inclination angle schematic diagram, Figure 13-1 represent that inclination angle is 15 between standpipe and incoming
Degree, Figure 13-2 represent that inclination angle is 30 degree, and Figure 13-3 represents that inclination angle is 45 degree.
The outside of second supporting plate 14 is provided with multiple pulleys 16, the ocean installed when the number of the pulley and experiment
The quantity of riser model is identical, and pulley base cushion block 23 is provided between the pulley base of the pulley 16 and the second supporting plate 14, described
Pulley base cushion block 23 is wedge, and the lower section for the pulley base for being located at the pulley 16 in second supporting plate 14 is provided with a steel wire
Rope via；Include three sets of quantity and pulley number identical pulley base cushion block 23 in the experimental rig, often cover pulley base cushion block
The angle between inclined-plane and the contact surface of the second supporting plate 14 on 23 is respectively 15 degree, 30 degree, 45 degree.
As Figure 14-1, Figure 14-, 2 and Figure 14-3 show the wedge-shaped agllutination of the pulley cushion block that can change pulley base angle
Structure, because when inclination angle is 15 degree, 30 degree, 45 degree between the one, axial direction of marine riser model 1 and incoming vertical direction, ocean is stood
Angle of the tube model 1 axially between the vertical direction of first, second deflector 11 is changed into 15 degree, 20 degree, 45 degree, marine riser mould
One end of type 1 is drawn along its extended line in the pulley groove that steel wire rope needs have mercy on pulley 16, in order that the pulley groove of pulley 16 exists
, it is necessary to install the pulley cushion block of different wedge angles in first, second supporting plate 14 on the extended line of marine riser model 1
23, then pulley 16 is installed again.When inclination angle is 15 degree between the axial direction of marine riser model 1 and incoming vertical direction, wedge is installed
The pulley cushion block that shape face angle is 15 degree, by that analogy, when inclination angle is between the axial direction of marine riser model 1 and incoming vertical direction
At 30 degree, the pulley cushion block of 30 degree of installation；When inclination angle is 45 degree between the axial direction of marine riser model 1 and incoming vertical direction,
The pulley cushion block of 45 degree of installation.
Between on the inner side of first support tube 13 and subject beam and the inner side of second support tube 13 and main body
Down tube 9 is respectively connected between on crossbeam；First deflector and the second deflector are plastic plate, and described first leads
Hog frame 12 is respectively equipped with flowing plate and second deflector, as shown in Figure 6.
The inner side of second deflector 11 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 15-1, Figure 15-2, Figure 15-3 and Figure 15-4
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, the streamlined deflector 11 of radome fairing 27 and first or the streamlined radome fairing 27 and second
It is connected by screw bolts between deflector 11.
A pulling force sensor is connected with 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 14 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 being attached thereto is in the same plane；
The wire and the pulling force sensor are connected with the strain acquirement instrument, the strain acquirement instrument and the calculating
Machine connects.
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.
Exemplified by with the marine riser model for suppressing structure, its manufacturing process is as follows：Along copper first in platform plane
Tube axis direction is relative before and after marking, and four parallel lines opposing upper and lower, determines strain gauge adhesion position.Copper pipe both ends are distinguished
Load onto thick column joint and thin column joint.The oxide layer of strain gauge adhesion position copper pipe surface is removed, pastes foil gauge, it is front and rear
Mutually in a pair, upper and lower foil gauge is mutual in a pair for foil gauge, using half-bridge connection, and by binding post connecting wire, wherein
Foil gauge is separated with the filament that binding post connects and copper pipe surface with thin adhesive tape, to realize insulation, glued in foil gauge
Appropriate silicon rubber is applied at patch, to reach the purpose of protection and waterproof, draws the wire of each position to copper pipe both ends 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), (if naked pipe structure, so far form the marine riser in thermoplastic tube outer sheath last layer silicone tube
Model), since on the left of pipe, a pitch is divided into several pieces, it is true using spiral wire tag locating ring in each position
Spiral line position is made, is bonded three silica gel strips using helix cemented in place ring, processing silicone tube is not bonded silica gel strip position
Silica gel, make silica gel strip surface clean smooth clean and tidy, the silica gel strip of bonding represents the spiral strake during vortex-induced vibration suppresses, 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 11, Fig. 1 and Fig. 3 are illustrated that on two deflectors respectively installation stream
Line style radome fairing 27, rotating the first and second end support meanss 2 makes the angle corresponding with angle scale 4 of the angle board 21 at the top of it
Degree is corresponding, even if the first and second deflectors 11 and direction of flow keeping parallelism.The spacing between marine riser model 1 is determined,
Corresponding angle clamp 22 is arranged in the rectangle gap of streamlined sleeve side plate 29, and by the pulley cushion block of respective angles
23 are arranged in the second supporting plate 14 for having steel wire rope 17 to pass through that side, and then pulley 16 is arranged on pulley cushion block 23.Will
The both ends of marine riser model 1 are fixed in first, second end support meanss 2.The one or both ends of marine riser model 1 are drawn
Wire along first or the second end support meanss 2 or extend to transverse test branch along first, second end support meanss 2 respectively
Hold the one or both ends of frame 3.By whole experimental rig to the bottom of trailer 20, experimental rig is hung with the loop wheel machine on the top of trailer 20
Rise, and it is arranged on trailer in respective angles on trailer 20 for (15 degree, 30 degree, 45 degree).Regulation pulling force stretcher 24 makes end
Portion's pulling force reaches the size needed for operating condition of test.Pulling force sensor 25 and wire are connected with deformeter, deformeter connection computer,
Computer-internal is provided with corresponding data collection and analysis software.When trailer starts, fluid is static in streamlined sleeve coaming plate 28,
Flow of fluid in the middle part of marine riser model, that is, realize stepped inlet flow conditions.
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 single standpipe vortex vibration testing device of inclination angle ladder inlet flow conditions 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 (13) of vertical direction, the top of first support tube (13)
Horizontally disposed first angle plate (21) is connected with, the bottom of first support tube (13) is connected with the first supporting plate (14),
First deflector parallel with first supporting plate (14) is bolted on the inside of first supporting plate (14)
(11), the bottom of first deflector (11) is provided with a through hole；It is provided with a universal coupling (10) in through hole, described ten thousand
It is fixed on to one end of shaft coupling (10) by universal coupling screw (15) in the first supporting plate, the universal coupling (10)
The other end be connected with the first column joint (5) in the marine riser model (1)；
The second end support meanss include the second support tube (13) of vertical direction, the top of second support tube (13)
Horizontally disposed second angle plate (21) is connected with, the bottom of second support tube (13) is connected with the second supporting plate (14),
Second deflector parallel with second supporting plate (14) is bolted on the inside of second supporting plate (14)
(11), the bottom of second deflector (11) is provided with a rectangle gap, and angle clamp (22) is provided with rectangle gap,
The angle clamp (22) is provided with a standpipe mounting hole；Include four angle clamps (22) in the experimental rig, each
The axis of standpipe mounting hole on angle clamp (22) and the angle of angle clamp (22) thickness direction are respectively 0 degree, 15 degree, 30
Spend, 45 degree；
The outside of second supporting plate (14) is provided with a pulley (16), the pulley base and the second supporting plate of the pulley (16)
(14) pulley base cushion block (23) is provided between, the pulley base cushion block (23) is wedge, and second supporting plate (14) is upper
A steel wire rope via is provided with the lower section of the pulley base of the pulley (16)；Include three pulley base cushion blocks in the experimental rig
(23), the angle between the inclined-plane on each pulley base cushion block (23) and the second supporting plate (14) contact surface be respectively 15 degree, 30
Spend, 45 degree；
Streamline radome fairing (27) is fixed with the inside of second deflector (11), the streamlined radome fairing (27) covers
The shaft part of described marine riser model (1) one end；
A pulling force sensor is connected with 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 ocean
The second column joint (6) in riser model, through the steel wire rope via in the second supporting plate (14) after around pulley (16) extremely
The other end of tension spring is connected with steel wire rope (17)；The axis of the steel wire rope (17) and the marine riser model (1) exists
In same plane；
The wire and the pulling force sensor are connected 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 ladder inlet flow conditions 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
(30), the cross section of the silicone band (30) 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 ladder inlet flow conditions deep-sea tension type according to claim 1, its
Be characterised by, on the inner side of first support tube (13) and subject beam between and second support tube (13) inner side with
Down tube (9) is respectively connected between on subject beam.
4. the single standpipe vortex vibration testing device of inclination angle ladder inlet flow conditions deep-sea tension type according to claim 1, its
It is characterised by, first deflector and the second deflector are plastic plate, first deflector and second deflector
On be respectively equipped with hog frame (12).
5. the single standpipe vortex vibration testing device of inclination angle ladder inlet flow conditions deep-sea tension type according to claim 1, its
It is characterised by, the streamlined radome fairing (27) includes streamlined coaming plate (28) and is arranged on the outer plate of coaming plate (28) one end
(29), the outer plate (29) is provided with bolt through-hole, is adopted between the streamlined radome fairing (27) and the second deflector (11)
It is connected with.
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| CN107478408B (en) * | 2017-08-16 | 2023-10-20 | 中国海洋石油集团有限公司 | Riser array dynamic response experimental device under simulated uniform flow effect |
| CN110118901A (en) * | 2019-04-03 | 2019-08-13 | 西安科技大学 | Different angle conducting wire overcurrent fault imitative experimental appliance |
| CN115014680A (en) * | 2022-06-17 | 2022-09-06 | 中海石油(中国)有限公司 | Vortex-induced vibration test device for steel catenary riser model |
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