CN105241623B - Local velocity increases inclination angle ladder incoming vortex-induced vibration of marine riser experimental rig - Google Patents
Local velocity increases inclination angle ladder incoming vortex-induced vibration of marine riser experimental rig Download PDFInfo
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- CN105241623B CN105241623B CN201510601195.XA CN201510601195A CN105241623B CN 105241623 B CN105241623 B CN 105241623B CN 201510601195 A CN201510601195 A CN 201510601195A CN 105241623 B CN105241623 B CN 105241623B
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Abstract
The invention discloses a kind of local velocity to increase inclination angle ladder incoming vortex-induced vibration of marine riser experimental rig, including marine riser model, transverse test support, flow velocity aggrandizement apparatus, trailer, strain acquirement instrument and computer, streamline radome fairing is fixed with the inside of the deflector of marine riser model side, streamlined radome fairing covers the shaft part of marine riser model one end；The flow velocity aggrandizement apparatus being arranged in the middle part of marine riser model, flow velocity aggrandizement apparatus include speedup section and steady flow segment, speedup section flare；Steady flow segment, which is provided with, is used for the through hole that marine riser model passes through；It is rotatable to support device to be connected between transverse test support and flow velocity increase cover.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 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 simultaneously, and 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 a kind of office
Portion's flow velocity increase inclination angle ladder incoming vortex-induced vibration of marine riser experimental rig.
Background technology
Standpipe is one of important equipment of deep-sea oil gas exploitation.As oil-gas mining marches to deep-sea, the operation water of standpipe
Deep increasing, in deepwater regions, wave and sea ship motion damage gradual decrease to caused by standpipe, but ocean current becomes
The principal element for causing standpipe to damage.The effect depth of water scope of ocean current is very big, and when ocean current passes through marine riser, standpipe trailing edge will
Alternate vortex shedding is produced, when vortex shedding frequency is close with the standpipe natural frequency of vibration, the vibration of standpipe will force whirlpool to take off
Fall frequency to be fixed near the standpipe natural frequency of vibration, induce vortex-induced vibration.Vortex-induced vibration is the master for causing standpipe that fatigue rupture occurs
Want reason.
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.
Study the most reliable of vortex-induced vibration of marine riser phenomenon and maximally effective means are model tests.Tried by model
Test, vortex-induced vibration phenomenon, principal character and inlet flow conditions can be observed on being influenceed caused by vortex-induced vibration than more comprehensive,
Obtain more reliable result of the test and carry out the theoretical precision with numerical model of effect.Accumulated experience for engineering is actual.In reality
Ocean engineering environment, not only standpipe is axially and incoming vertical direction has certain inclination angle, while entirely deep from sea level to seabed
Flow velocity section in the range of degree is not unalterable, such as deepwater regions of the Gulf of Mexico or South China Sea, general table
Mean flow rate is 4 to 5 times of the 300-800 rice depth of waters in the range of 300 meters of layer, is more than 20 times below 800 meters of depth of waters, exists
Local flow velocity increases region suddenly.Come it can be found that the incoming in the range of entire depth is local velocity increase inclination angle ladder
Stream.
Found through being retrieved to existing technical literature, increase inclination angle ladder incoming marine riser for local velocity both at home and abroad
Vortex-induced vibration experimental study is considerably less.The stepped incoming standpipe vortex-induced vibration experiment being directed under aclinal plumbness is existing
Carry out.21st phase in 2005《Journal of Fluids and Structures》Paper " Laboratory in magazine
measurements 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), are devised a set of
Exquisite experimental rig.A bucket is holded up on the towing basin water surface, bung is below the water surface, due to 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 the upper of bucket, lower end
Supported with bottom of pond annex, bucket is fixed on trailer, and stepped incoming experimental condition is produced after starting trailer.But the device
It can not realize that local velocity increases the stepped inlet flow conditions in inclination angle.
Found by being investigated to existing technical literature, both at home and abroad for the local velocity increase stepped marine riser in inclination angle
Vortex-induced vibration experimental study is not carried out also, and main cause is a lack of necessary experimental rig.How inclination angle inlet flow conditions, such as are realized
What realizes that local velocity increases, and how to realize that stepped inlet flow conditions etc. are to need the technical barrier overcome badly.
The content of the invention
The present invention is for existing for local velocity increase inclination angle ladder incoming vortex-induced vibration of marine riser experimental rig research
Difficult point and deficiency, there is provided the experiment of research local velocity increase inclination angle ladder incoming vortex-induced vibration of marine riser and vibration suppression
Device, it is capable of the stepped incoming at test simulation inclination angle, correlation test research work is carried out to deep-sea tensioned risers, probes into it
Vortex-induced vibration genesis mechanism and carry out the influence of flow inclination to vortex-induced vibration etc., necessary experiment reference is provided and borrowed for engineering is actual
Mirror.
In order to solve the above-mentioned technical problem, a kind of local velocity increase inclination angle ladder incoming marine riser proposed by the present invention
Vortex vibration testing device, including marine riser model, transverse test support, flow velocity aggrandizement apparatus, trailer, 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,
Two side roof parts of the subject beam are respectively provided with angle scale；The top of the subject beam is provided with channel-section steel, the trailer branch
Support is on channel-section steel；The first end support meanss include the first support tube of vertical direction, the top of first support tube
Horizontally disposed first angle plate is connected with, the bottom of first support tube is connected with the first supporting plate, first support
First deflector parallel with first supporting plate is bolted on the inside of plate, the bottom of first deflector is set
There is a through hole；A universal coupling is provided with through hole, one end of the universal coupling is consolidated by universal coupling screw
It is scheduled in the first supporting plate, the other end of the universal coupling connects with the first column joint in the marine riser model
Connect；The second end support meanss include the second support tube of vertical direction, and water is connected with the top of second support tube
The second angle plate that plain cloth is put, the bottom of second support tube are connected with the second supporting plate, the inner side of second supporting plate
Second deflector parallel with second supporting plate is bolted, the bottom of second deflector is provided with one long
Square gap, rectangle gap is interior to be provided with angle clamp, and the angle clamp is provided with a standpipe mounting hole；The experimental rig
In include four angle clamps, the axis of the standpipe mounting hole on each angle clamp and the angle of angle clamp thickness direction
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 with
Pulley base cushion block is provided between second supporting plate, the pulley base cushion block is wedge, is located in second supporting plate each
Pulley base is respectively arranged below with a steel wire rope via；Include three pulley base cushion blocks, each pulley base in the experimental rig
The angle between inclined-plane and the second supporting plate contact surface on cushion block is respectively 15 degree, 30 degree, 45 degree；Second deflector
Inner side is fixed with streamline radome fairing, and the streamlined radome fairing covers the shaft part of described marine riser model one end；It is described
A number pulling force sensor, the pulling force are connected with subject beam, positioned at the connection end side with the second end support meanss
The other end of sensor is connected with pulling force stretcher and tension spring in turn；Connect from the second cylinder in the marine riser model
Head, through the steel wire rope via in the second supporting plate after around the other end of pulley to tension spring be connected with steel wire rope；It is described
The axis of steel wire rope and the marine riser model is in the same plane；The flow velocity aggrandizement apparatus includes rotatable support device
Increase with flow velocity and cover, the rotatable support device includes connecting plate, fixed supporting pillar, rotatable supporting pillar, fixed plate, angle
Fixed plate, connecting plate level are welded on fixed supporting pillar, and connecting plate can be screwed on transverse test support, Gu
Surely column bottom is supported to be welded and fixed plate, the top soldering angle fixed plate of rotatable supporting pillar, with screw connection fixed plate and angle
Fixed plate is spent, bottom and the flow velocity increase cover of rotatable supporting pillar weld, open-ended before and after the flow velocity increase cover, up and down
There is side wall, its side view is tubaeform, flow velocity increase cover internal flow, the order flowed through by current, is followed successively by speedup section and steady
Section is flowed, speedup section flow velocity increase cover section is to contract, and steady flow segment cross sectional shape keeps constant, and current increase by speedup section speed
Big hole is opened to steady flow segment development stability, flow velocity increase cover along the left and right side wall of pipe fitting axial direction, it is ensured that pipe fitting vibrates not greatly
Flow velocity increase cover can be touched.Pipe fitting model increases away from flow velocity covers side wall up and down, and more than 30 times of calibers of front and rear edges, speedup section is entered
The ratio between open area and discharge area are by testing the flow velocity multiple to be increased, field test condition is coordinated to determine.It is described rotatable
Angled fixed plate is fixed at the top of supporting pillar, and the on both sides of the middle of the rotatable supporting pillar is welded with rope ruggedized construction, institute
State angle fixed plate and be provided with two as one group of four group of second through hole, the second through hole and the fixation in the angle fixed plate
The position relationship of first through hole is on plate：Every group of second through hole is identical with the centre-to-centre spacing of two first through hole, four group of second through hole
The line of centres intersect at point A, the point A overlaps with the midpoint of the line of centres of every group of second through hole, four group of second through hole
The line of centres be designated as respectively line of centres L1, line of centres L2, line of centres L3 and the line of centres L4, the line of centres L1 with
The floor projection of the line of centres of two first through hole overlaps, line of centres L2, line of centres L3 and line of centres L4 successively with
Line of centres L1 angle is 15 degree, 30 degree and 45 degree；Between the fixed supporting pillar and the rotatable supporting pillar by
The fixed plate set in the through hole of one of which second in two first through hole and the angle fixed plate in the fixed plate
Connecting bolt connects；Rope ruggedized construction and the transverse test branch positioned at the on both sides of the middle welding of the rotatable supporting pillar
Hold and be respectively equipped with oblique pull steel wire rope, the wire and the pulling force sensor between frame and couple with the strain acquirement instrument, it is described
Strain acquirement instrument is connected with the computer；The flow velocity aggrandizement apparatus being arranged in the middle part of the marine riser model, the flow velocity
Aggrandizement apparatus includes flow velocity increase cover and rotatably supports device, and the flow velocity increase cover includes what is sequentially arranged by water (flow) direction
Speedup section and steady flow segment, the speedup section flare, the water inlet end of the speedup section are tubaeform big opening end, the speedup
The water side of section is tubaeform osculum end, and the openings of sizes of the steady flow segment and tubaeform osculum end are in the same size；It is described
The water inlet end of speedup section and the area of water side are than the flow velocity multiple to be increased for the flow velocity aggrandizement apparatus；The steady flow segment is set
There is the through hole passed through for the marine riser model；The rotatable top for supporting device is fixed on transverse test support
On, the rotatable bottom for supporting device and flow velocity increase cover welding.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention solves the equipment problem of local velocity increase inclination angle ladder incoming vortex-induced vibration of marine riser experiment, leads to
Cross design to can be achieved to come flow inclination and stepped flow field, and the inlet flow conditions increased with local velocity so that experimental condition is more
Add and meet actual ocean engineering operating mode.The deep sea vertical pipe vortex-induced vibration experiment of the achievable large Reynold number of the present invention, big L/D ratio is seen
Survey, while the design of apparatus of the present invention is simple, installation and debugging are convenient, cheap, are deep sea vertical pipe vortex-induced vibration experimental studies
Essential device measure, it compensate for academia and lack the stepped inlet flow conditions deep-sea tension type list in inclination angle with flow velocity increase
The blank of root standpipe vortex-induced vibration rig for testing, there is important application value and scientific meaning.
Brief description of the drawings
Fig. 1 is the structural representation of the standpipe vortex vibration testing device with flow velocity aggrandizement apparatus of unrestraint structure；
Fig. 2 is thick column joint and the signal of thin column joint at the marine riser model both ends of unrestraint structure in the present invention
Figure；
Fig. 3 is the structural representation with the standpipe vortex vibration testing device with flow velocity aggrandizement apparatus for suppressing structure；
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 first, second supporting plate structure schematic diagram shown in Fig. 1；
Fig. 6 is the structural representation of deflector 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 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 15-1 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 16-1 is that schematic device is rotatably supported in the present invention；
Figure 16-2 is the side view that device is rotatably supported shown in Figure 16-1；
Figure 16-3 is the top view that device is rotatably supported shown in Figure 16-1；
Figure 17-1 is the upward view after angle fixed plate 61 and the connection of rotatable supporting pillar 52；
Figure 17-2 is the amplification inclinating view after angle fixed plate shown in Figure 17-1 61 and the connection of rotatable supporting pillar 52；
Figure 18-1 is that angle of attack incoming is 0 degree of bottom plate and the connection diagram of angle fixed plate 61；
Figure 18-2 is that angle of attack incoming is 15 degree of bottom plates and the connection diagram of angle fixed plate 61；
Figure 18-3 is that angle of attack incoming is 30 degree of bottom plates and the connection diagram of angle fixed plate 61；
Figure 18-4 is that angle of attack incoming is 45 degree of bottom plates and the connection diagram of angle fixed plate 61；
Figure 19-1 is the front view of flow velocity aggrandizement apparatus；
Figure 19-2 is the left view of the increase cover of flow velocity shown in Figure 19-1；
Figure 19-3 is the top view of the increase cover of flow velocity shown in Figure 19-1；
Figure 20 is the rotatable connection diagram for supporting device and flow velocity increase cover；
Figure 21 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- tension spring 20- trailer 21- angle boards
22- angle clamp 23- pulley base cushion blocks
The streamlined radome fairings of 24- pulling force stretcher 25- pulling force sensors 27-
28- coaming plate 29- outers plate 30- silicone bands
31- speedup section 32- steady flow segment 33- big holes
Above and below 34- side walls 35- or so the rotatable supporting pillars of side wall 52-
53- foil gauge 54- connecting plate 55- heat-shrink tubes
56- silicone tubes 57- reinforces rope attaching nut's 58- fixed plate connecting bolts
59- fixes supporting pillar 60- fixed plate 61- angle fixed plates
62- flow velocity aggrandizement apparatus 63- rotatably supports device 64- flow velocitys increase cover
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.
As shown in figure 1, a kind of local velocity increase inclination angle ladder incoming vortex-induced vibration of marine riser experimental rig of the present invention,
It is described including marine riser model 1, transverse test support 3, flow velocity aggrandizement apparatus 62, trailer, 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
Both ends connection, 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 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 Fig. 2 and Figure 21；If with suppression structure
, then on the basis of above-mentioned naked pipe structure, it is in spiral shell to be provided with a plurality of on the outer surface of silicone tube 56 of the marine riser model 1
The silicone band 30 of spin line 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
Shown in Fig. 4 and Figure 21.
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 131 of vertical direction, the top of first support tube 131
Portion is connected with horizontally disposed first angle plate, and the bottom of first support tube 131 is connected with the first supporting plate 141, described
The inner side of first supporting plate 141 is bolted first deflector 111 parallel with first supporting plate 141, described
The bottom of first deflector 111 is provided with a through hole, and a universal coupling 10, the universal coupling are provided with the through hole
10 one end is fixed in the first supporting plate by universal coupling screw 15, the other end of the universal coupling 10 with it is described
The first column joint 5 in marine riser model 1 connects.
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, and the bottom of second support tube 132 is connected with the second supporting plate 142, described
The inner side of second supporting plate 142 is bolted second deflector 112 parallel with second supporting plate 142, described
The bottom of second deflector 112 is provided with a rectangle gap, and angle clamp 22, the angle clamp are provided with rectangle gap
22 are provided with a standpipe mounting hole；Include four angle clamps 22 in the experimental rig, it is vertical on each angle clamp 22
The axis of pipe mounting 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 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 in second supporting plate 142 each
Pulley base is respectively arranged below with a steel wire rope via；Include three sets of quantity in the experimental rig to slide with pulley number identical
Wheel seat cushion block 23, often cover the angle between inclined-plane and the contact surface of the second supporting plate 142 on pulley base cushion block 23 be respectively 15 degree,
30 degree, 45 degree.
As Figure 14-1, Figure 14-2 and Figure 14-3 show the wedge-shaped agllutination for the pulley base cushion block that can change pulley base angle
Structure, due to when between the axial direction of marine riser model 1 and incoming vertical direction inclination angle be 15 degree, 30 degree, 45 degree when, marine riser mould
Angle of the type 1 axially between the vertical direction of first, second deflector 112 is changed into 15 degree, 30 degree, 45 degree, marine riser model 1
One end along its extended line draw steel wire rope need in the pulley groove for entering pulley 16, in order that the pulley groove of pulley 16 is in ocean
, it is necessary to install the pulley base cushion block 23 of different wedge angles in first, second supporting plate 142 on the extended line of riser model 1,
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, lozenges is installed
The pulley base cushion block that angle is 15 degree, by that analogy, when inclination angle is 30 between the axial direction of marine riser model 1 and incoming vertical direction
When spending, the pulley base 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 base cushion block of 45 degree of installation.
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；First deflector and the second deflector are plastic plate, and described first
Hog frame 12 is respectively equipped with deflector and second deflector, as shown in Figure 6.
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 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 111 of radome fairing 27 and first or the streamlined radome fairing 27 and
It is connected by screw bolts between two deflectors 112.
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 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 being attached thereto is in the same plane；
The flow velocity aggrandizement apparatus 62 is described by rotatably supporting the one end of device 63 to be fixed on transverse test support
It is rotatable to support the other end of device 63 with flow velocity increase cover 64 by being welded to connect, as shown in figure 20, the marine riser model 1
Increase the big hole 33 of 64 or so side walls 35 of cover through flow velocity, it is ensured that pipe fitting vibration will not touch flow velocity increase cover 64.
Described rotatable support device by fix supporting pillar 59, fixed plate 60, rotatable supporting pillar 52, connecting plate 54,
Angle fixed plate 61, fixed plate connecting bolt 58, reinforce the composition such as rope attaching nut 57, pulling force stretcher 24.As Figure 16-1,
Shown in Figure 16-2 and Figure 16-3, the rotatable support device 63 includes fixed supporting pillar 59, rotatable supporting pillar 52；Fixed branch
The cross section for holding post 59 and rotatable supporting pillar 52 is aerofoil profile, as shown in Figure 17-1 and 17-2.The top of the fixed supporting pillar 59
Portion and middle part are respectively equipped with connecting plate 54, and the bottom of the fixed supporting pillar 59 is fixed with fixed plate 60, the fixed plate 60 with
The 59 perpendicular arrangement of fixed supporting pillar, the fixed plate 60 are provided with two first through hole；The rotatable supporting pillar 52
Top fix angled fixed plate 61, the on both sides of the middle of the rotatable supporting pillar 52 is welded with rope ruggedized construction, the rope
It is rope reinforced that the company of cover 64 is increased using reinforcing rope attaching nut 57, bottom and the flow velocity of the rotatable supporting pillar 52
Connect.The rotatable both sides of supporting pillar 52 are welded with two and reinforce rope attaching nut 57 as shown in figure 16, and reinforcing rope can connect
Rope attaching nut 57 and pulling force stretcher 24 are reinforced, and is fixed on transverse test support 3.By adjusting pulling force stretcher
Size come adjust it is rotatable support the perpendicularity of device, and make bracing reinforcement.
As shown in Figure 17-1, the flow velocity aggrandizement apparatus that angle fixed plate 61 opens multiple Kong Kewei and has inclination angle incoming provides branch
Support, i.e., described angle fixed plate 61 are provided with four group of second through hole that two are one group, and second is logical in the angle fixed plate 61
Hole and the position relationship of first through hole in the fixed plate 60 are：As shown in Figure 17-2, every group of second through hole and two first are logical
The centre-to-centre spacing in hole is identical, and the line of centres of four group of second through hole intersects at point A, the point A and every group of second through hole center company
The midpoint of line overlaps, the line of centres of four group of second through hole be designated as respectively line of centres L1, line of centres L2, line of centres L3 and
Line of centres L4, the line of centres L1 overlap with the floor projection of the line of centres of two first through hole, line of centres L2, in
Heart line L3 and line of centres L4 is successively 15 degree, 30 degree and 45 degree with line of centres L1 angle.The fixed supporting pillar 59
Pass through two first through hole in the fixed plate 60 and the angle fixed plate 61 between the rotatable supporting pillar 52
On the through hole of one of which second in the fixed plate connecting bolt 58 that sets connect；Figure 18-1 is that angle of attack incoming is 0 degree of lower fixation
Plate and the connection diagram of angle fixed plate 61, when incoming vertical direction and the axial inclination of pipeline are 15 degree, angle is fixed
Plate 61 rotates 15 degree and then is connected with fixed plate screw 58, as shown in Figure 18-2；When the axial direction of incoming vertical direction and pipeline is inclined
When angle is 30 degree, angle fixed plate 61 is rotated 30 degree and then is connected with fixed plate screw 58, as shown in Figure 18-3；When incoming is hung down
Nogata to be 45 degree with the axial inclination of pipeline when, angle fixed plate 61 is rotated 45 degree and then is connected with fixed plate screw 58,
As shown in Figure 18-4.
As shown in Figure 19-1,19-2,19-3, the flow velocity aggrandizement apparatus 62 at the middle part of marine riser model 1, bag are arranged on
Flow velocity increase cover 64 and rotatable support device 63 are included, the flow velocity increase cover 64 includes the speedup sequentially arranged by water (flow) direction
Section 31 and steady flow segment 32, the flare of speedup section 31, the water inlet end of the speedup section 31 is tubaeform big opening end, described
The water side of speedup section 31 is tubaeform osculum end, the openings of sizes of the steady flow segment 32 and tubaeform osculum end size one
Cause；The water inlet end of the speedup section 31 and the area of water side are than the flow velocity multiple to be increased for the flow velocity aggrandizement apparatus 62；
The steady flow segment 32, which is provided with, is used for the through hole that the marine riser model 1 passes through；The rotatable top for supporting device 63 is consolidated
It is scheduled on transverse test support 3, the rotatable bottom for supporting device 63 and the welding of flow velocity increase cover 64.The stream
Open-ended before and after speed increase cover 64, there are upper and lower side wall 34 and left and right side wall 35, its side view is tubaeform, in flow velocity increase cover 64
Portion's fluid, the order flowed through by current are followed successively by speedup section 31 and steady flow segment 32, and 64 sections of speedup section flow velocity increase cover are inwardly received
Contracting, steady flow segment cross sectional shape keep constant, and current increase to the development stability of steady flow segment 32, flow velocity increase by the speed of speedup section 31
Cover 64 opens big hole 33 along the left and right side wall of pipe fitting axial direction, it is ensured that pipe fitting vibration will not touch flow velocity increase cover.Pipe fitting mould
Type increases away from flow velocity covers side wall 34 up and down, and it is more than 30 times of calibers of front and rear edges, the ratio between inlet -duct area and discharge area of speedup section
By testing the flow velocity multiple to be increased, the coordination of field test condition determines.
The wire and the pulling force sensor couple 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 thin first in platform plane
Wall copper pipe axis direction is relative before and after marking, and four parallel lines opposing upper and lower, determines strain gauge adhesion position.By thin-wall copper pipe
Thick column joint and thin column joint are loaded onto respectively in both ends.The oxide layer on strain gauge adhesion position thin-wall copper pipe surface is removed, is glued
Foil gauge is pasted, mutually in a pair, upper and lower foil gauge mutually in a pair, using half-bridge connection, and passes through binding post to front and rear foil gauge
Connecting wire, wherein being separated foil gauge with the filament that binding post connects and thin-wall copper pipe surface with thin adhesive tape, with reality
Now insulate, appropriate silicon rubber is applied at strain gauge adhesion, to reach the purpose of protection and waterproof, draw the wire of each position to thin
Wall copper pipe both ends are simultaneously fixed wire along thin-wall copper pipe axis direction with thin adhesive tape, if the then dried layer on thin-wall copper pipe outer sheath
Heat-shrink tube (makes its outer surface be in close contact with silica gel pipe internal surface), in heat-shrink tube outer sheath last layer silicone tube (if naked pipe
Structure, so far form the marine riser model), since on the left of pipe, a pitch is divided into several pieces, each
Spiral line position is determined in position using spiral wire tag locating ring, and three silica gel strips are bonded using helix cemented in place ring,
Processing silicone tube is not bonded the silica gel of silica gel strip position, makes silica gel strip surface clean smooth clean and tidy, the silica gel strip 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 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 112 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 seat cushion of respective angles
Block 23 is arranged in the second supporting plate 142 for having steel wire rope 17 to pass through that side, and pulley 16 is then arranged on pulley base cushion block 23
On.It is rotatable to support device 63 by flow velocity aggrandizement apparatus 62 by rotatably supporting device 63 to be fixed on transverse test support 3
It is connected with transverse test support 3 by connecting plate 54 with screw, the rotatable both sides of supporting pillar 52 are welded with two and reinforce rope company
Connected nut 57, reinforcing rope can be with reinforcement by connection rope attaching nut 57 and pulling force stretcher 24, and is fixed on transverse test branch
Hold on frame 3.The perpendicularity of rotatable support device 63 is adjusted by adjusting the size of pulling force stretcher 24, and makes bracing reinforcement.
Big hole 33 by marine riser model 1 through flow velocity increase cover 64, and its both ends is fixed on first, second end support dress
Put on 2.The wire that the one or both ends of marine riser model 1 are drawn along first or the second end support meanss 2 or respectively along the
First, the second end support meanss 2 extend to the one or both ends of transverse test support 3.By whole experimental rig to trailer 20
Bottom, experimental rig is sling with the loop wheel machine on the top of trailer 20, and make it with trailer be in respective angles (15 degree, 30 degree, 45 degree)
On trailer 20.Regulation pulling force stretcher 24 makes end pulling force reach the size needed for operating condition of test.Pulling force sensor 25
It is connected with wire with deformeter, deformeter connection computer, computer-internal is provided with corresponding data collection and analysis software.Drag
When car starts, fluid is static in streamlined sleeve coaming plate 28, flow of fluid in the middle part of marine riser model, that is, realizes stepped incoming
Condition.
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 (6)
1. a kind of local velocity increases inclination angle ladder incoming vortex-induced vibration of marine riser experimental rig, including marine riser model
(1), transverse test support (3), trailer, strain acquirement instrument and computer, one end of the marine riser model (1) are provided with the
One end support meanss, the other end of the marine riser model (1) are provided with the second end support meanss, the first end branch
Both ends of the top of support arrangement and the second end support meanss respectively with the transverse test support are 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 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 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 of vertical direction, and water is connected with the top of first support tube
The first angle plate that plain cloth is put, the bottom of first support tube are connected with the first supporting plate, the inner side of first supporting plate
First deflector parallel with first supporting plate is bolted, the bottom of first deflector is provided with one and led to
Hole；A universal coupling (10) is provided with through hole, one end of the universal coupling (10) passes through universal coupling screw
(15) it is fixed in the first supporting plate, the in the other end of the universal coupling (10) and the marine riser model (1)
One column joint (5) connects；
The second end support meanss include the second support tube of vertical direction, and water is connected with the top of second support tube
The second angle plate that plain cloth is put, the bottom of second support tube are connected with the second supporting plate, the inner side of second supporting plate
Second deflector parallel with second supporting plate is bolted, the bottom of second deflector is provided with one long
Square gap, rectangle gap is interior to be provided with angle clamp (22), and the angle clamp (22) is provided with a standpipe mounting hole；Should
Include four angle clamps (22) in experimental rig, axis and the angle card of the standpipe mounting hole on each angle clamp (22)
The angle of plate (22) thickness direction is respectively 0 degree, 15 degree, 30 degree, 45 degree；
The outside of second supporting plate is provided with a pulley (16), between the pulley base of the pulley (16) and the second supporting plate
Provided with pulley base cushion block (23), the pulley base cushion block (23) is wedge, is located at each pulley base in second supporting plate
Be respectively arranged below with a steel wire rope via；Include three pulley base cushion blocks (23), each pulley seat cushion in the experimental rig
The angle between inclined-plane and the second supporting plate contact surface on block (23) is respectively 15 degree, 30 degree, 45 degree；
Streamline radome fairing (27) is fixed with the inside of second deflector, the streamlined radome fairing (27) covers described
The shaft part of 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 (142) 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 couple with the strain acquirement instrument, and the strain acquirement instrument connects with the computer
Connect；
It is characterized in that：
The middle part of the marine riser model (1) is provided with flow velocity aggrandizement apparatus (62), and the flow velocity aggrandizement apparatus (62) includes stream
Speed increase cover (64) and rotatable support device (63), the flow velocity increase cover (64) include the increasing sequentially arranged by water (flow) direction
Fast section (31) and steady flow segment (32), speedup section (31) flare, the water inlet end of the speedup section (31) is tubaeform
Big opening end, the water side of the speedup section (31) are tubaeform osculum end, the openings of sizes and loudspeaker of the steady flow segment (32)
The osculum end of shape is in the same size；The water inlet end of the speedup section (31) and the area ratio of water side are the flow velocity aggrandizement apparatus (62)
The flow velocity multiple to be increased；
The steady flow segment (32), which is provided with, is used for the through hole that the marine riser model (1) passes through；The rotatable support device
(63) top is fixed on transverse test support (3), the rotatable bottom for supporting device (63) and flow velocity increasing
Big cover (64) welding.
2. local velocity increase inclination angle ladder incoming vortex-induced vibration of marine riser experimental rig according to claim 1, it is special
Sign is：It is rotatable to support device (63) to include fixed supporting pillar (59) and rotatable supporting pillar (52),
The top and middle part of the fixed supporting pillar (59) are respectively equipped with connecting plate (54), the bottom of the fixed supporting pillar (59)
It is fixed with fixed plate (60), the fixed plate (60) and the perpendicular arrangement of the fixed supporting pillar (59), the fixed plate (60)
It is provided with two first through hole；
Angled fixed plate (61), the middle part of the rotatable supporting pillar (52) are fixed in the top of the rotatable supporting pillar (52)
Both sides are welded with rope ruggedized construction, bottom and flow velocity increase cover (64) welding of the rotatable supporting pillar (52)；
The angle fixed plate (61) is provided with two as one group of four group of second through hole, second on the angle fixed plate (61)
Through hole and the position relationship of first through hole in the fixed plate (60) are：The centre-to-centre spacing of every group of second through hole and two first through hole
Identical, the line of centres of four group of second through hole intersects at point A, the point A and the line of centres of every group of second through hole midpoint weight
Close, the line of centres of four group of second through hole is designated as line of centres L1, line of centres L2, line of centres L3 and the line of centres respectively
L4, the line of centres L1 overlap with the floor projection of the line of centres of two first through hole, line of centres L2, line of centres L3
It is successively 15 degree, 30 degree and 45 degree with line of centres L1 angle with line of centres L4；
Pass through two in the fixed plate (60) between the fixed supporting pillar (59) and the rotatable supporting pillar (52)
The fixed plate connecting bolt (58) set in the through hole of one of which second in first through hole and the angle fixed plate (61) is even
Connect；
Rope ruggedized construction and the transverse test support positioned at the on both sides of the middle welding of the rotatable supporting pillar (52)
(3) oblique pull steel wire rope is respectively equipped between.
3. local velocity according to claim 1 or claim 2 increases inclination angle ladder incoming vortex-induced vibration of marine riser experimental rig, 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.
4. local velocity according to claim 1 or claim 2 increases inclination angle ladder incoming vortex-induced vibration of marine riser experimental rig, 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).
5. local velocity according to claim 1 or claim 2 increases inclination angle ladder incoming vortex-induced vibration of marine riser experimental rig, 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).
6. local velocity according to claim 1 or claim 2 increases inclination angle ladder incoming vortex-induced vibration of marine riser experimental rig, 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 (112)
It is connected with.
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| CN106679791B (en) * | 2016-12-15 | 2019-08-30 | 天津大学 | Submarine pipeline vortex-induced vibration simulator and experimental method |
| CN107833502B (en) * | 2017-10-30 | 2021-01-12 | 西南石油大学 | Ocean current simulation experiment device |
| CN109682524B (en) * | 2019-02-18 | 2024-06-14 | 中国海洋大学 | Device for measuring drag force of rigid slender rod test piece for experiments |
| CN113028914B (en) * | 2021-03-10 | 2022-07-22 | 中国船舶科学研究中心 | Hoisting type underwater navigation body supporting device |
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