CN101089578A - Vortex vibration testing device for flexible pipe mould vertical in towing pool - Google Patents
Vortex vibration testing device for flexible pipe mould vertical in towing pool Download PDFInfo
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- CN101089578A CN101089578A CN 200710043697 CN200710043697A CN101089578A CN 101089578 A CN101089578 A CN 101089578A CN 200710043697 CN200710043697 CN 200710043697 CN 200710043697 A CN200710043697 A CN 200710043697A CN 101089578 A CN101089578 A CN 101089578A
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Abstract
A vortex-exciting vibration test device of flexible pipe fittings mode set horizontally in pull water pool is prepared as passing pipe fittings model through flow-speed increasing unit; setting said model and said unit vertically in pull water pool; supporting two ends of said model by support mechanism; using horizontal test support to connect said unit and support mechanism with trailer and distributing various instruments of measurement-analysis system in said model, said units, said mechanism, said support and said trailer.
Description
Technical field
What the present invention relates to is a kind of test unit of field of ocean engineering, and specifically, what relate to is a kind of vortex vibration testing device that is horizontally placed on flexible pipe mould in the towing basin.
Background technology
Under action of ocean current, can periodically produce vortex shedding on the flexible pipes such as the subsea pipeline of suspended span, ocean platform standpipe and towing cable.Therefore these flexible pipes bear periodic exciting force, thereby the vortex-induced vibration phenomenon occurs.Vortex-induced vibration will cause the resistance coefficient of flexible pipe to increase and structural fatigue destroys.In the flexible pipe of design ocean, pipe fitting will be the key factor that must consider because of vortex-induced vibration causes fatigure failure.
At present, model test is one of the most reliable and topmost research means of research flexible pipe vortex-induced vibration phenomenon.By model test, can comparatively comprehensively observe vortex-induced vibration phenomenon and principal character thereof, obtain test findings comparatively reliably.Test findings can be used to the precision of effect theory and numerical model.The result of use of vortex-induced vibration vibration-repressing device all need be verified by model test before engineering is used usually formal the input.
The flow field is comparatively complicated in the actual ocean, and flow velocity is very fast.The flow field that the general less flexible pipe of length suffers in whole length range is comparatively even, but Reynolds number is higher, usually in the critical section, some in addition in supercritical region.The general bigger flexible pipe of length suffers the possibility of equal uniform flow almost nil in whole length range, and flow velocity often layering acts on it.In some layering flow velocity section, the Reynolds number that pipe fitting suffered that these length are bigger is also quite high, and some also will reach supercritical region.In artificial pond, how to realize the pipe fitting vortex-induced vibration test of high reynolds number, for the bigger flexible pipe vortex-induced vibration of some length, how to realize the flow velocity layering, will make also that simultaneously the Reynolds number that pipe fitting suffered in some layering flow velocity section is approaching with reality as far as possible, all be the technical barrier in the present vortex-induced vibration test field.
The domestic scholar of having did the vortex-induced vibration model test of small scale marine riser, subsea pipeline and towing cable.These vortex-induced vibration model tests are generally finished in towing basin.In towing basin, drag model and form uniform flow field, produce vortex-induced vibration.In the world, the vortex-induced vibration of small scale pipe fitting is carried out a large amount of model investigations, and also the vortex-induced vibration of the bigger flexible pipe of length has been carried out some model investigations in recent years.These tests, what have carries out in towing basin, and what have carries out in annular water tank, and what also have drags standpipe with towboat at sea and carries out the vortex-induced vibration model test.These tests of being carried out, flow velocity axially is generally equal uniform flow or shear flow along pipe fitting, and the maximum Reynolds number of being realized is general and actual to differ an order of magnitude.
Through the prior art document is retrieved discovery, at ISBN number is 1-880653-62-1, be for ISSN number that paper " Laboratory Investigation of Long Riser VIV Response " (experimental study of long riser vortex excited vibration response) is the typical paper about flexible pipe vortex-induced vibration experimental study among " Proceedings of The Fourteenth (2004) InternationalOffshore and Polar Engineering Conference " (14 international coastal waters and polar region engineering conference collection of thesis) of 1098-6189.Mentioned a kind of flexible pipe vortex-induced vibration model test technology in the literary composition, the compliant riser model is horizontally placed in the towing basin, the standpipe end is by extending the support support the entry and obtain axial tensile force from trailer, trailer drags riser model and produces uniform flow field, measure the standpipe motion with the twin shaft that is arranged in the pipe to acceleration transducer, arrange that in the standpipe end force transducer measures suffered resistance of whole standpipe and lift, be embedded in optical fibre Bragg optical grating strain sensor at the standpipe wall and measure dependent variable in the standpipe wall.By analysis, the weak point of this technology is: one, and can only produce along standpipe is uniform flow field axially, and the residing flow field of compliance standpipe mostly is uneven; Two, the maximum Reynolds number that can realize is lower, and the maximum Reynolds number that is suffered with the compliance standpipe differs an order of magnitude; Three, the pond limited length, when the speed of a motor vehicle was higher, the getable test section distance of institute became very little, and the data that can adopt are corresponding to be become seldom.
Summary of the invention
The objective of the invention is to solve above shortcomings when in the past in towing basin, finishing flexible pipe vortex-induced vibration model test, provide that a kind of flow velocity is higher, flow velocity big or small can layering, the vortex vibration testing device that is horizontally placed on flexible pipe mould in the towing basin that the test section distance is longer.
The objective of the invention is to be achieved through the following technical solutions:
The present invention includes: pipe fitting model, end portion supports mechanism, flow velocity aggrandizement apparatus, transverse test support, trailer and measuring and analysis system.Annexation is: the pipe fitting model passes the flow velocity aggrandizement apparatus, pipe fitting model and flow velocity aggrandizement apparatus all are horizontally placed in the towing basin, the two ends of pipe fitting model are supported by end portion supports mechanism, the transverse test support is connected with end portion supports mechanism the flow velocity aggrandizement apparatus with trailer, each instrument and equipment dispersed placement of measuring and analysis system is among pipe fitting model, end portion supports mechanism, flow velocity aggrandizement apparatus, transverse test support and trailer.
Described pipe fitting model, when for simulation ocean platform standpipe, its linear mass is 1 with the ratio that its unit length arranges the quality of water, to eliminate sagging that effect pipe fitting model owing to gravity produces.
Described flow velocity aggrandizement apparatus is made up of incremental body, spoiler, cutoff board, video camera fixed head and current meter fixed head.Two incremental body symmetric arrangement, folded zone is divided into three sections, by the order that current flow through, is followed successively by contraction section, steady flow segment and expanding section.The width of steady flow segment is more than 30 times of pipe fitting model diameters, and the length of steady flow segment is more than 50 times of pipe fitting model diameters, and the pipe fitting model is on the steady flow segment long axis and place the 2/3 steady flow segment length place from the steady flow segment inlet boundary.Multiple, the flow field quality that the ratio of the inlet-duct area of contraction section and discharge area will increase flow velocity by test require and economy between coordinate definite.The bicubic curve of using always when the contraction section curve designs for wind-tunnel, corner position is a mid point.The length of contraction section is taken as about 1.5 times of contraction section entrance width.Expanding section curve and contraction section curve are about steady flow segment minor axis symmetry.Two incremental external side curves and inside curve symmetry.Two spoilers are arranged symmetrically in two incremental external sides, and spoiler is parallel with incremental external side curve straight-line segment.The distance that two spoilers exceed incremental body rear and front end point all is more than 0.5 times of contraction section length.The distance of spoiler and incremental external side curve straight-line segment is 0.5 times of steady flow segment width, and steady flow segment flow velocity amplification multiple can reach contraction section and shrink 98.5% of multiple.The two ends of incremental body and spoiler are separately fixed on two cutoff boards, and cutoff board and parallel-flow vertical with spoiler is to layout.Cutoff board should exceed the about 0.2 times of contraction section length of spoiler foremost in the longitudinal direction, and the width of cutoff board should be about 1.2 times of two spoiler spacings, like this to guarantee that the fluid in the flow velocity aggrandizement apparatus zone does not influence the outer fluid of cutoff board substantially.If flow velocity aggrandizement apparatus length on the pipe fitting model is axial is bigger, can equidistantly between the cutoff board at two ends, install several cutoff boards again additional, can guarantee the intensity of flow velocity aggrandizement apparatus like this.Pass through the place at the pipe fitting model on the cutoff board, be provided with slotted eye, run into the pipe fitting model of vibration to avoid cutoff board, long axis of ellipse is on grain direction.The current meter fixed head that is used for hanging current meter is installed on the steady flow segment front portion, and the upper end of current meter fixed head is connected with incremental body.In the rear end of steady flow segment and with the current meter fixed head in same cross section, the video camera fixed head is installed, the two ends of video camera fixed head are connected with incremental body up and down.Underwater Camera and corresponding light source are installed in the middle part of video camera fixed head.With the same cross section of current meter fixed head in and open a hole in the incremental body above the pipe fitting model, be used for laying Underwater Camera and corresponding light source, water proof glass, hole centrally aligned pipe fitting model are installed in the hole.According to measurement requirement, in a plurality of cross sections of flow velocity aggrandizement apparatus, arrange flow rate corresponding instrument fixed head and video camera fixed head, and in incremental body, open corresponding hole.
Described end portion supports mechanism is made up of support shell, back up pad, bolt, spring, slide block, cross-axle universal shaft shaft joint and end cutoff board.The axial end cutoff board of the open-ended place of support shell and vertical tube model is connected, and perforate is to allow the pipe fitting model pass through on the cutoff board of end.The support shell cross section is oval, transverse with come flow path direction parallel.Four back up pads are cruciform and are arranged in the support shell.Slide block is a right cylinder, equidistantly opens four road grooves at its outside surface, and the length direction of groove is axial consistent with slide block.Slide block places in the chute that stays in the middle part of four back up pads, and the edge of four back up pads docks with four grooves of shoe surface, and slide block can slide along back up pad.Support shell bottom end plate center has internal thread, and bolt is screwed into internal thread, and bolt head is connected with spring, and spring is connected with slide block by chute, and the slide block other end and cross-axle universal shaft shaft joint are affixed, and the cross-axle universal shaft shaft joint is connected with pipe fitting model end again.
Described transverse test support is made up of wing hanging column, wing post bracket, lateral struts, arc connector and adapter plate.Wing hanging column cross section is wing, and wing hanging column and trailer link are reinforced by wing post bracket.End portion supports mechanism hangs with single wing hanging column.Flow velocity aggrandizement apparatus two ends connect arc connector respectively earlier, and the upper end of arc connector connects wing hanging column, is connected with lateral struts between two wing hanging columns.The bottom of arc connector connects adapter plate does not influence pipe fitting model herein to guarantee disturbance that arc connector produces current.
Described measuring and analysis system is made up of multispectral current meter, Underwater Camera, light source, optical fibre Bragg optical grating strain sensor, bright mark, shearing force measurement device, pulling force sensor, multichannel image capture card, strain amplifier, data line, termination, automatic data collection card and the computing machine reined in of acoustics.The multispectral current meter of reining in of acoustics is installed on the current meter fixed head, is trailer speed of a motor vehicle size in the flow velocity that the pipe fitting mold segment the suffered size that does not have the flow velocity aggrandizement apparatus.Underwater Camera and light source are installed in the hole of being dug in the incremental body of video camera fixed head and flow velocity aggrandizement apparatus.Underwater Camera of being installed and light source must be aimed at the pipe fitting model.Camera lens central axis and pipe fitting model intersection indicate bright mark under water, also put on bright mark on the pipe fitting model at the about 10cm in centre mark both sides place respectively.Arrange optical fibre Bragg optical grating strain sensor in the tube wall of pipe fitting model, evenly arrange four optical fibre Bragg optical grating strain sensors around pipe fitting model cross-sectional periphery, two on flowing to, two perpendicular to the flow direction.Axially there are several to be furnished with the cross section of optical fibre Bragg optical grating strain sensor along the pipe fitting model.In the slide block groove at pipe fitting model two ends, arrange the shearing force measurement device respectively.Arrange pulling force sensor on the spring respectively.The data that collected by Underwater Camera are transferred to the multichannel image capture card that is positioned on the trailer by data line, and then are transferred on the computing machine that image processing and analyzing software is housed, and carry out the processing and the storage of data.Acoustics is multispectral to be reined in data that current meter, optical fibre Bragg optical grating strain sensor, shearing force measurement device and pulling force sensor collected and is transferred to strain amplifier, termination, automatic data collection card and computing machine on the trailer successively by data line, computer real-time analysis software is housed in the computing machine, analyzes the data that transmit by these instruments and store.
Compared with prior art, the invention has the beneficial effects as follows: after starting trailer, the flow velocity multiple that is increased in the flow velocity aggrandizement apparatus can reach contraction section import and export area ratio 98.5%, thereby can realize higher Reynolds number; To increase the flow field uniformity of flow velocity good; Can produce along the flow field of pipe fitting model axial flow velocity size layering, thereby can simulate more flow field near the ocean true environment; Compare with pipe fitting model vortex vibration testing device in the general towing basin, under same flow velocity, the speed of a motor vehicle required for the present invention is lower, can make that the data sampling energy long period is continuous.
Description of drawings
Fig. 1 is the primary structure arrangenent diagram of the embodiment of the invention;
Fig. 2 is the structural representation of flow velocity aggrandizement apparatus;
Fig. 3 is the A-A cut-open view of Fig. 2;
Fig. 4 is the structural representation of end portion supports mechanism;
Fig. 5 is the B-B cut-open view of Fig. 4;
Fig. 6 is the transverse test support structural representation of band lateral struts;
Fig. 7 is the C-C cut-open view of Fig. 6;
Fig. 8 is the D-D cut-open view of Fig. 6;
Fig. 9 is an instrument layout synoptic diagram on the pipe fitting model;
Figure 10 is the E-E cut-open view of Fig. 9;
Figure 11 is the annexation figure of each apparatus of measuring and analysis system.
Description of reference numerals: pipe fitting model 1, end portion supports mechanism 2, flow velocity aggrandizement apparatus 3, transverse test support 4, trailer 5, measuring and analysis system 6, incremental body 7, spoiler 8, cutoff board 9, video camera fixed head 10, current meter fixed head 11, contraction section 12, steady flow segment 13, expanding section 14, support shell 15, back up pad 16, bolt 17, spring 18, slide block 19, cross-axle universal shaft shaft joint 20, end cutoff board 21, wing hanging column 22, wing post bracket 23, lateral struts 24, arc connector 25, adapter plate 26, the multispectral current meter 27 of reining in of acoustics, Underwater Camera 28, light source 29, optical fibre Bragg optical grating strain sensor 30, bright mark 31, shearing force measurement device 32, pulling force sensor 33, multichannel image capture card 34, strain amplifier 35, data line 36, termination 37, automatic data collection card 38, computing machine 39.
Embodiment
Also elaborate to of the present invention in conjunction with the accompanying drawings below by embodiment: following examples have provided detailed embodiment and process being to implement under the prerequisite with the technical solution of the present invention, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, present embodiment is made up of pipe fitting model 1, end portion supports mechanism 2, flow velocity aggrandizement apparatus 3, transverse test support 4, trailer 5 and measuring and analysis system 6.Pipe fitting model 1 is horizontally placed on and carries out the vortex-induced vibration test in the towing basin, pipe fitting model 1 passes flow velocity aggrandizement apparatus 3, flow velocity aggrandizement apparatus 3 has only one and place in 1/3 length areas of pipe fitting model 1 middle part, the two ends of pipe fitting model 1 support that by end portion supports mechanism 2 transverse test support 4 is connected with end portion supports mechanism 2 flow velocity aggrandizement apparatus 3 with trailer 5.
As shown in Figures 2 and 3, flow velocity aggrandizement apparatus 3 is made up of incremental body 7, spoiler 8, cutoff board 9, video camera fixed head 10 and current meter fixed head 11.
Two incremental body 7 symmetric arrangement, folded zone is divided into three sections, by the order that current flow through, is followed successively by contraction section 12, steady flow segment 13 and expanding section 14.The width of steady flow segment 13 is more than 30 times of pipe fitting model 1 diameters, and the length of steady flow segment 13 is more than 50 times of pipe fitting model 1 diameters, and pipe fitting model 1 is on steady flow segment 13 long axis and place from 2/3 steady flow segment, 13 length places, steady flow segment 13 inlet boundaries.Multiple, the flow field quality that the ratio of the inlet-duct area of contraction section 12 and discharge area will increase flow velocity by test require and economy between coordinate definite.The bicubic curve of using always when contraction section 12 curves design for wind-tunnel, corner position is a mid point.The length of contraction section 12 is taken as about 1.5 times of contraction section 12 entrance width.Expanding section 14 curves and contraction section 12 curves are about steady flow segment 13 minor axis symmetries.Two incremental body 7 outside curves and inside curve symmetry.Two spoilers 8 are arranged symmetrically in two incremental body 7 outsides, and spoiler 8 is parallel with incremental body 7 outside curve straight-line segments.The distance that two spoilers 8 exceed incremental body 7 rear and front end points all is more than 0.5 times of contraction section 12 length.The distance of spoiler 8 and incremental body 7 outside curve straight-line segments is 0.5 times of steady flow segment 13 width, and steady flow segment 13 flow velocity amplification multiple can reach contraction section 12 and shrink 98.5% of multiples.The two ends of incremental body 7 and spoiler 8 are separately fixed on two cutoff boards 9, and the vertical and parallel-flow of cutoff board 9 and spoiler 8 is to layout.Cutoff board 9 should exceed spoiler 8 about 0.2 times of contraction section 12 length foremost in the longitudinal direction, the width of cutoff board 9 should be about 1.2 times of two spoiler 8 spacings, like this to guarantee that the interior fluid in flow velocity aggrandizement apparatus 3 zones does not influence the fluid outside the cutoff board 9 substantially.If flow velocity aggrandizement apparatus 3 pipe fitting model 1 axially on length bigger, can be equidistantly again 9 of cutoff boards at two ends install several cutoff boards 9 additional, can guarantee the intensity of flow velocity aggrandizement apparatus 3 like this.Pass through the place at pipe fitting model 1 on the cutoff board 9, be provided with slotted eye, run into the pipe fitting model 1 of vibration to avoid cutoff board 9, long axis of ellipse is on grain direction.The current meter fixed head 11 that is used for hanging current meter is installed on steady flow segment 13 front portions, and the upper end of current meter fixed head 11 is connected with incremental body 7.In the rear end of steady flow segment 13 and with current meter fixed head 11 in same cross section, video camera fixed head 10 is installed, the two ends of video camera fixed head 10 are connected with incremental body 7 up and down.Underwater Camera 28 and corresponding light source 29 are installed in the middle part of video camera fixed head 10.With current meter fixed head 11 same cross sections in and open a hole in the incremental body 7 above pipe fitting model 1, be used for laying Underwater Camera 28 and corresponding light source 29, water proof glass, hole centrally aligned pipe fitting model 1 are installed in the hole.According to measurement requirement, in a plurality of cross sections of flow velocity aggrandizement apparatus 3, arrange flow rate corresponding instrument fixed head 11 and video camera fixed head 10, and in incremental body 7, open corresponding hole.
As shown in Figure 4 and Figure 5, end portion supports mechanism 2 is made up of support shell 15, back up pad 16, bolt 17, spring 18, slide block 19, cross-axle universal shaft shaft joint 20 and end cutoff board 21.
Support shell 15 open-ended places and a vertical tube model 1 axial end cutoff board 21 is connected, and perforate is to allow pipe fitting model 1 pass through on the end cutoff board 21.Support shell 15 cross sections are oval, transverse with come flow path direction parallel.Four back up pads 16 are cruciform and are arranged in the support shell 15.Slide block 19 is a right cylinder, equidistantly opens four road grooves at its outside surface, and the length direction of groove is axial consistent with slide block 19.Slide block 19 places in the chute that four back up pad 16 middle parts stay, and the edge of four back up pads 16 docks with four grooves on slide block 19 surfaces, and slide block 19 can slide along back up pad 16.Support shell 15 bottom end plate centers have internal thread, bolt 17 is screwed into internal thread, and bolt 17 heads are connected with spring 18, and spring 18 is connected with slide block 19 by chute, slide block 19 other ends and cross-axle universal shaft shaft joint 20 are affixed, and cross-axle universal shaft shaft joint 20 is connected with pipe fitting model 1 end again.
As Fig. 6, Fig. 7 and shown in Figure 8, transverse test support 4 is made up of wing hanging column 22, wing post bracket 23, lateral struts 24, arc connector 25 and adapter plate 26.
As Fig. 9, Figure 10 and shown in Figure 11, measuring and analysis system 6 is made up of multispectral current meter 27, Underwater Camera 28, light source 29, optical fibre Bragg optical grating strain sensor 30, bright mark 31, shearing force measurement device 32, pulling force sensor 33, multichannel image capture card 34, strain amplifier 35, data line 36, termination 37, automatic data collection card 38 and the computing machine 39 reined in of acoustics.
The multispectral current meter 27 of reining in of acoustics is installed on the current meter fixed head 11, and the flow velocity size that is suffered on 1 section on the pipe fitting model that does not have flow velocity aggrandizement apparatus 3 is trailer 5 speed of a motor vehicle sizes.Underwater Camera 28 and light source 29 are installed in the hole of being dug in the incremental body 7 of video camera fixed head 10 and flow velocity aggrandizement apparatus 3.Underwater Camera of being installed 28 and light source 29 must be aimed at pipe fitting model 1.Video camera 28 optical center axis and pipe fitting model 1 intersection indicate bright mark 31 under water, also put on bright mark 31 on the pipe fitting model 1 at the about 10cm in centre mark both sides place respectively.Arrange optical fibre Bragg optical grating strain sensor 30 in the tube wall of pipe fitting model 1, arrange evenly that around pipe fitting model 1 cross-sectional periphery 30, two of four optical fibre Bragg optical grating strain sensors are flowing to, two perpendicular to the flow direction.Axially there are several to be furnished with the cross section of optical fibre Bragg optical grating strain sensor 30 along pipe fitting model 1.In slide block 19 grooves at pipe fitting model 1 two ends, arrange shearing force measurement device 32 respectively.Arrange pulling force sensor 33 on the spring 18 respectively.The data that collected by Underwater Camera 28 are transferred to the multichannel image capture card 34 that is positioned on the trailer 5 by data line 36, and then are transferred on the computing machine 39 that image processing and analyzing software is housed, and carry out the processing and the storage of data.Acoustics is multispectral to be reined in data that current meter 27, optical fibre Bragg optical grating strain sensor 30, shearing force measurement device 32 and pulling force sensor 33 collected and is transferred to strain amplifier 35, termination 37, automatic data collection card 38 and computing machine 39 on the trailer 5 successively by data line 36, computer real-time analysis software is housed in the computing machine 39, analyzes the data that transmit by these instruments and store.
Below introduce the making and the installation process of present embodiment device: before test, select the proper model scaling factor according to the yardstick of towing basin, the physical size of pipe fitting, the concrete condition of operating condition of test and the economy of test earlier, obtain the concrete size of pipe fitting model 1.According to the size of pipe fitting model 1, the concrete condition of operating condition of test, the yardstick of trailer 5 and the economy of test, obtain the key dimension of flow velocity aggrandizement apparatus 3.According to the strength control requirement of whole test device, and the vibration control requirement, determine the concrete size and the material of each parts of flow velocity aggrandizement apparatus 3 and end portion supports mechanism 2, determine each part dimension and the material of transverse test support 4 simultaneously.
After each part dimension of flow velocity aggrandizement apparatus 3, end portion supports mechanism 2 and transverse test support 4 and material were determined, these devices completed.Each instrument and equipment of measuring and analysis system 6 can go respective market to buy.
Various devices, instrument and equipment are just installed after making and getting all the ready.Earlier rein in the relevant position that current meter 27 is installed to current meter fixed head 11 acoustics is multispectral on the ground, measuring the relevant position that Underwater Camera 28 and the respective sources 29 of pipe fitting model 1 vertical current to vibration is installed to video camera fixed head 10, the Underwater Camera 28 of measuring 1 flow direction vibration of pipe fitting model and respective sources 29 are installed in the corresponding hole of being opened in the incremental body 7.Pulling force sensor 33 is installed on spring 18, and shearing force measurement device 32 is packed in the groove of slide block 19.Transverse test support 4 is installed to relevant position under the trailer 5.Be connected transverse test support 4 installing the multispectral flow velocity aggrandizement apparatus 3 of reining in current meter 27, Underwater Camera 28 and light source 29 of acoustics.The relevant position that two end portion supports mechanism 2 usefulness transverse test supports 4 that install pulling force sensor 33 and shearing force measurement device 32 are installed under the trailer 5.Multispectral current meter 27, Underwater Camera 28, light source 29, pulling force sensor 33 and shearing force measurement device 32 required data line 36 and the power leads reined in of acoustics are received on the trailer 5 along close wing hanging column 22 respectively.
The relevant position of optical fibre Bragg optical grating strain sensor 30 embedding pipe fitting models 1 tube wall of some, after having embedded, face seal also rubs smooth.The data line 36 of optical fibre Bragg optical grating strain sensor 30 is derived by tube chamber in the pipe fitting model 1.Bright mark 31 is put in crossing pipe fitting model 1 surface of video camera 28 optical center axis and pipe fitting model 1 central axis under water.Along pipe fitting model 1 axis, put on bright mark 31 more respectively on pipe fitting model 1 surface at the place separated by a distance, bright mark 31 both sides that has put on.On the pipe fitting model 1 in each Underwater Camera 28 camera lens the place aheads, all put on three bright marks 31.Whole pipe fitting model 1 is divided into several sections installation and the making of carrying out optical fibre Bragg optical grating strain sensor 30, data line 36 and bright mark 31.
After all pipe fitting model 1 sectional makings are finished, pipe fitting model 1 segment end portion at two ends is connected with cross-axle universal shaft shaft joint 20 respectively.Then flow velocity aggrandizement apparatus 3 is passed in remaining pipe fitting model 1 segmentation and also be connected in series mutually, be connected in series with pipe fitting model 1 segmentation at mounted two ends simultaneously.Data line 36 in the pipe fitting model 1 in the tube chamber and power lead are derived from pipe fitting model 1 both ends, and receive on the trailer 1 along the corresponding wing hanging column 22 in the transverse test support 4.
In computing machine 39, install computer real-time analysis software and image processing and analyzing software, automatic data collection card 38 and multichannel image capture card 34 are inserted in the associated socket of computing machine 39, connect respectively from deriving the data line 36 of coming the apparatus under water.Deriving the power lead that comes under water in the apparatus also connects with the mains respectively.
After all appts device installs, need debug.Debugging finishes, and each apparatus all can operate as normal, just can pacify operating mode and test specification and start trailer 5 and test.
It should be noted last that: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the foregoing description has been described in detail the present invention, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed among the claim scope of the present invention.
Claims (11)
1. vortex vibration testing device that is horizontally placed on flexible pipe mould in the towing basin, comprise: pipe fitting model (1), trailer (5) and measuring and analysis system (6), it is characterized in that, also comprise: end portion supports mechanism (2), flow velocity aggrandizement apparatus (3) and transverse test support (4), pipe fitting model (1) passes flow velocity aggrandizement apparatus (3), pipe fitting model (1) and flow velocity aggrandizement apparatus (3) all are horizontally placed in the towing basin, the two ends of pipe fitting model (1) are supported by end portion supports mechanism (2), transverse test support (4) is connected with end portion supports mechanism (2) flow velocity aggrandizement apparatus (3) with trailer (6), each instrument and equipment dispersed placement of measuring and analysis system (7) is in pipe fitting model (1), end portion supports mechanism (2), flow velocity aggrandizement apparatus (3), among transverse test support (4) and the trailer (5).
2. the vortex vibration testing device that is horizontally placed on flexible pipe mould in the towing basin according to claim 1, it is characterized in that, described flow velocity aggrandizement apparatus (3) is by incremental body (7), spoiler (8), cutoff board (9), video camera fixed head (10), current meter fixed head (11) is formed, two spoilers (8) are arranged symmetrically in two incremental bodies (7) outside, the two ends of incremental body (7) and spoiler (8) are separately fixed on two cutoff boards (9), cutoff board (9) and parallel-flow vertical with spoiler (8) is to layout, the upper end of current meter fixed head (11) is connected with incremental body (7), in the same cross section of current meter fixed head (11) video camera fixed head (10) is set.
3. the vortex vibration testing device that is horizontally placed on flexible pipe mould in the towing basin according to claim 2, it is characterized in that, described two incremental bodies (7) symmetric arrangement, folded zone is followed successively by contraction section (12), steady flow segment (13) and expanding section (14), it is the bicubic curve of mid point that contraction section (12) curve selects corner position, expanding section (14) curve and contraction section (12) curve symmetry, two incremental bodies (7) outside curve and inside curve symmetry, cutoff board (9) is gone up at pipe fitting model (1) by locating to be provided with slotted eye, steady flow segment (13) front portion is provided with current meter fixed head (11), in the rear end of steady flow segment (13) and with current meter fixed head (11) video camera fixed head (10) is set in same cross section, with establish a hole in the same cross section of current meter fixed head (11) and in the incremental body (7) of pipe fitting model (1) top, the hole is provided with water proof glass, and video camera fixed head (10) is arranged on the rear end of steady flow segment (13).
4. the vortex vibration testing device that is horizontally placed on flexible pipe mould in the towing basin according to claim 3, it is characterized in that, described steady flow segment (13), its width be at 30 times of pipe fitting models (1) more than the diameter, and its length is at 50 times of pipe fitting models (1) more than the diameter.
5. according to claim 3 or the 4 described vortex vibration testing devices that are horizontally placed on flexible pipe mould in the towing basin, it is characterized in that the distance of spoiler (8) and incremental body (7) outside curve straight-line segment is 0.5 times of steady flow segment (13) width.
6. the vortex vibration testing device that is horizontally placed on flexible pipe mould in the towing basin according to claim 3, it is characterized in that described pipe fitting model (1) is on steady flow segment (13) long axis and place from steady flow segment (13) inlet boundary 2/3 steady flow segment (13) length place.
7. the vortex vibration testing device that is horizontally placed on flexible pipe mould in the towing basin according to claim 3, it is characterized in that, described spoiler (8) is parallel with incremental body (7) outside curve straight-line segment, and the distance that two spoilers (8) exceed incremental body (7) rear and front end point all is more than 0.5 times of contraction section (12) length.
8. the vortex vibration testing device that is horizontally placed on flexible pipe mould in the towing basin according to claim 1, it is characterized in that, described end portion supports mechanism (2) is by support shell (15), back up pad (16), bolt (17), spring (18), slide block (19), cross-axle universal shaft shaft joint (20) and end cutoff board (21) are formed, the open-ended place of support shell (15) is connected with end cutoff board (21), four back up pads (16) are cruciform and are arranged in the support shell (15), slide block (19) outside surface is equidistantly opened four road grooves, slide block (19) places in the chute that stays in the middle part of four back up pads (16), the edge of four back up pads (16) docks with four grooves on slide block (19) surface, slide block (19) can slide along back up pad (16), support shell (15) bottom end plate center has internal thread, bolt (17) is screwed into internal thread, bolt (17) head is connected with spring (18), spring (18) is connected with slide block (19) by chute, slide block (19) other end and cross-axle universal shaft shaft joint (20) are affixed, and cross-axle universal shaft shaft joint (20) is connected with pipe fitting model (1) end again.
9. the vortex vibration testing device that is horizontally placed on flexible pipe mould in the towing basin according to claim 8 is characterized in that, described support shell (15) cross section is oval, transverse with come flow path direction parallel.
10. the vortex vibration testing device that is horizontally placed on flexible pipe mould in the towing basin according to claim 1, it is characterized in that, described transverse test support (4) is by wing hanging column (22), wing post bracket (23), lateral struts (24), arc connector (25) and adapter plate (26) are formed, wing hanging column (22) cross section is wing, wing hanging column (22) is reinforced by wing post bracket (23) with trailer (6) link, flow velocity aggrandizement apparatus (3) two ends connect arc connector (25) respectively earlier, the upper end of arc connector (25) connects wing hanging column (22), be connected with lateral struts (24) between two wing hanging columns (22), the bottom of arc connector (25) connects adapter plate (26).
11. the vortex vibration testing device that is horizontally placed on flexible pipe mould in the towing basin according to claim 1, it is characterized in that, described pipe fitting model (1), when for simulation ocean platform standpipe, its linear mass is 1 with the ratio that its unit length arranges the quality of water.
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| CNB2007100436970A CN100494943C (en) | 2007-07-12 | 2007-07-12 | Vortex vibration testing device for flexible pipe mould horizontal in towing pool |
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