CN111140570A - Marine pipeline vortex-induced vibration suppression device with ribbons - Google Patents
Marine pipeline vortex-induced vibration suppression device with ribbons Download PDFInfo
- Publication number
- CN111140570A CN111140570A CN202010072769.XA CN202010072769A CN111140570A CN 111140570 A CN111140570 A CN 111140570A CN 202010072769 A CN202010072769 A CN 202010072769A CN 111140570 A CN111140570 A CN 111140570A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- spoiler
- vortex
- outer sleeve
- induced vibration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001629 suppression Effects 0.000 title abstract description 18
- 239000000463 material Substances 0.000 claims description 10
- 239000004033 plastic Substances 0.000 claims description 9
- 229920003023 plastic Polymers 0.000 claims description 9
- 230000002401 inhibitory effect Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 description 8
- 239000007769 metal material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/01—Risers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Engineering & Computer Science (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a marine pipeline vortex-induced vibration suppression device with a streamer, which is arranged on the periphery of a marine pipeline and comprises a sliding sleeve, a spoiler (4) and the streamer (5), wherein the sliding sleeve comprises an inner sleeve (13) and an outer sleeve (14), the inner sleeve (13) is fastened on the periphery of the marine pipeline, the inner sleeve (13) and the outer sleeve (14) are connected through a bearing (10), so that the outer sleeve (14) can rotate relative to the inner sleeve, the spoiler (4) is connected with the outer sleeve (14), and the rubber streamer (5) is connected with the spoiler (4). The invention has the capability of self-adapting to the ocean current direction and can effectively inhibit vortex-induced vibration.
Description
Technical Field
The invention relates to an additional device for an ocean pipeline for inhibiting vortex-induced vibration, and belongs to the technical field of ocean engineering.
Background
The marine riser is a bridge between an offshore platform and a seabed oil field, is a key part in a deep sea oil and gas exploitation system, and is responsible for oil and gas transportation and other work. When the oil production platform is used for exploiting deepwater oil and gas, the structural reliability of the marine riser has important significance for normal operation of drilling and producing oil and gas. The ocean riser is in a complex environment of deep sea, and the ocean current flowing through the riser can form vortexes, and asymmetric vortexes are formed behind the riser and fall off to cause pipeline vibration. When the shedding frequency of the vortex is close to or equal to the natural frequency of the vertical pipe, the resonance phenomenon, namely the vortex-induced vibration phenomenon, can be caused, the fatigue damage of the vertical pipe is aggravated, and the service life of the deep sea vertical pipe is shortened. Once the deep sea riser is damaged, oil gas transported in the riser leaks, irreversible marine environmental pollution is caused, and huge economic loss is caused.
The current research results show that the active suppression method and the passive suppression method are mainly adopted for suppressing the vortex-induced vibration. The active inhibition method mainly disturbs the flow field and destroys the generation of vortex by external input energy such as sound wave, shock vibration and the like, thereby achieving the purpose of inhibiting vortex-induced vibration. However, this method requires continuous external energy input, and is too high in cost, so the utilization rate in practical engineering is not high. The passive inhibition method is to inhibit vortex-induced vibration by changing the surface shape of the marine riser or adding an additional device on the surface of the riser to break down the formation of vortex. Among them, the method of suppressing vortex-induced vibration by adding a spiral strake device on the surface of the marine riser is most widely used, and the domestic existing device (such as patent application No. CN201120007545.7) initiatively uses the spiral strake to suppress the vortex-induced vibration, but only single application of a spiral strip plate on the outer surface of the marine riser is carried out, and a good suppression effect cannot be realized. Later people find that various devices can effectively inhibit vortex generation, domestic patents (such as patent application number: CN201710037622.5) combine the streamer device with a vertical pipe to effectively inhibit vortex-induced vibration, but the connection between the design devices is complex, and a single device such as a sliding sleeve and a porous cover has a fine structure and is difficult to process, so that the device cannot be popularized in actual engineering.
At present, the common vortex-induced vibration suppression methods at home and abroad mostly adopt devices such as spiral strakes, guide plates, fairings and the like or the combination of all the devices.
The existing defects are mainly as follows:
1. many patents at home and abroad use too complicated technology, the accessories are numerous and the accessories are precisely connected, so that the processing of large and small parts is difficult, and the workload of an assembly device is huge, so that the assembly device is not suitable for being put into practical engineering.
2. Metallic materials are mostly used. The vortex-induced vibration suppression device made of metal materials has the advantages of high strength, high hardness and the like, but the suppression device is high in cost, easy to corrode and not durable when being placed in seawater, and low in overall cost performance. In addition, the metal material is heavy, and the buoyancy of the riser is easily influenced when the metal material is placed on the deep-sea riser, so that the structure of the riser is changed.
3. The capability of self-adapting to the direction of ocean current is not provided. The conventional vortex-induced vibration suppression device such as a guide plate, a fairing and the like often has a suppression effect only for incoming flow at a certain angle, and if the direction of ocean current changes, the suppression effect is reduced or completely disappears, so that the actual suppression effect is not ideal.
4. The surface protruding devices such as spherical protrusions and crescent ribs are not wear-resistant and cannot completely inhibit the generation of vortex behind the ocean current, and the practicability is low.
Disclosure of Invention
The invention aims to manufacture a device for inhibiting vortex-induced vibration of a ribbon, which has the advantages of simple assembly, light structure, corrosion resistance of materials and self-adaption to the direction of ocean currents, overcomes the defects of overlarge assembly difficulty, high manufacturing cost of parts and complex mechanism for inhibiting vibration of the conventional device, realizes the vortex-induced vibration inhibiting device which is simple to assemble, stable in structure and effective, and prolongs the service life of an ocean pipeline such as a deep sea flexible riser. The technical scheme is as follows:
a device for inhibiting vortex-induced vibration of an ocean pipeline with a streamer, which is arranged on the periphery of the ocean pipeline, is characterized by comprising a sliding sleeve, a spoiler 4 and the streamer 5, wherein,
the sliding sleeve comprises an inner sleeve 13 and an outer sleeve 14, the inner sleeve 13 is fastened on the periphery of the marine pipeline, the inner sleeve 13 and the outer sleeve 14 are connected through a bearing 10, so that the outer sleeve 14 can rotate relative to the inner sleeve, the spoiler 4 is connected with the outer sleeve 14, and the rubber streamer 5 is connected with the spoiler 4.
Preferably, the device further comprises a perforated cap 3 fixed to the outside of the outer sleeve 14, and the spoiler 4 is connected to the outer sleeve 14 through the perforated cap 3.
The bearing is a deep groove ball bearing.
The ribbon 5 is made of rubber.
The inner sleeve 13, the outer sleeve 14 and the spoiler 4 are of plastic material.
The porous cover 3 is made of plastic.
Compared with the prior art, the invention has the following advantages:
1. dense water flowing holes are formed in the porous cover, incoming flow can be disturbed to form a boundary layer on the pipeline, and the falling quantity of tail vortexes is reduced;
2. the vortex shedding at the tail part is irregularly arranged to generate vibration, and the ribbon arranged at the tail part has the function of disturbing the vortex arrangement, so that the vortex shedding frequency is inhibited to be equal to the natural frequency of the pipeline to generate resonance;
3. the porous cover is tightly attached to the sleeve, the sleeve is divided into an inner part and an outer part, and the inner part and the outer part are connected by adopting the deep groove ball bearing, so that the friction between the sleeves can be reduced, and the integral device can rotate to enable the integral device to be in the same direction with ocean current at any time;
4. sleeve, porous shroud and spoiler all adopt the plastics material, and low cost just is difficult for taking place to corrode the destruction, and the ribbon is the rubber material, has the ability of self-adaptation deformation under the ocean current, and plastics and rubber material are compared in the metal material more lightly, can provide certain buoyancy for the pipeline.
Drawings
FIG. 1 is a schematic view of the suppressing device;
FIG. 2 is a top view of the present restraining device;
fig. 3 is a sectional view of the piping structure of the suppressing device.
The drawings are described below
1-a deep sea riser; 2, sliding sleeve bosses; 3-porous cover; 4, a spoiler; 5-rubber streamer; 6, riveting; 7-circular through hole of outer sleeve; 8, a limit screw of the outer sleeve; 9-fixing screws; 10-deep groove ball bearing; 11-circular through hole of inner sleeve; 12-limit screw of inner sleeve; 13-an inner sleeve; 14-an outer sleeve; 15-overhanging circular through hole; 16-groove-shaped circular through hole.
Detailed Description
The deep sea riser is susceptible to ocean currents when deep sea oil extraction operation is carried out, vortex-induced vibration is caused by vortex generated behind a pipeline, and the service life of the riser is shortened. In order to eliminate the vortex-induced vibration phenomenon and achieve the effect of prolonging the service life of the vertical pipe, the vortex-induced vibration suppression device becomes an essential part of the deep-sea vertical pipe. This patent uses light corrosion resistant material, simplifies assembly structure, can effectively prevent the swirl and produce, restraines the vortex induced vibration effect. The embodiments of the invention will be further described with reference to the accompanying drawings in which:
fig. 1 is a schematic structural diagram of a vortex-induced vibration suppression device for a deep sea riser with a streamer, wherein a sliding sleeve of the device is divided into an inner sleeve 13 and an outer sleeve 14, the inner sleeve and the outer sleeve are respectively formed by splicing two semi-annular sleeves and are made of plastic materials. The inner sleeve 13 is tightly sleeved outside the deep sea riser 1 through a limit screw 12 of the inner sleeve, a circular through hole 7 of the outer sleeve is formed in the sliding sleeve boss 2 and used for installing a limit screw 8 of the outer sleeve, the effect of combining the two outer sleeves is achieved, meanwhile, the porous cover 3 is also installed on the outer sleeve through the limit screw 8 of the outer sleeve, and the porous cover 3 is also composed of two semi-cylinders. The spoiler 4 is connected with the perforated cover 3 through the fixing screw 9, and the rubber streamer 5 is tightly connected with the spoiler 4 through the rivet 6. The porous cover 3 has a certain thickness.
Fig. 2 is a structural plan view of the vortex-induced vibration suppression device, an inner sleeve 13 is tightly connected to the outside of the deep sea riser 1 through a limit screw 12 of the inner sleeve, and a deep groove ball bearing 10 is installed between the inner sleeve and the outer sleeve to provide a rotation function for the device. In the figure, the spoiler 4 is approximately rectangular and is also made of plastic, two groove-shaped circular through holes 16 are formed in the right end of the spoiler, the spoiler can be connected with the multihole cover 3 through two fixing screws 9, a groove is formed in the end face of the left end of the spoiler 4, and a plurality of rivet holes are formed in the plate surfaces on the two sides of the groove at equal intervals, so that the ribbons are fixed in the groove and connected through rivets 6. The ribbon 5 is made of rubber, the tail end of the ribbon is in a sawtooth shape, and the other end of the ribbon is riveted in a groove of the spoiler.
Fig. 3 is a sectional view of the pipeline structure of the vortex-induced vibration suppression device, wherein a limit screw 12 of the inner sleeve penetrates through a circular through hole 11 of the inner sleeve to tightly fix two semi-annular inner sleeves on the outer side of the deep sea vertical pipe 1, and the upper end and the lower end of the sliding sleeve are provided with deep groove ball bearings 10. The porous cover 3 is composed of two identical plastic semi-annular cylinders which are combined by means of four overhanging circular through holes 15 and fixing screws 9. Square holes with the same size are uniformly distributed on the surface of the porous cover 3, the upper end and the lower end of the porous cover are fixed by the sliding sleeve boss 2 and the limiting screw 8 of the outer sleeve, and the porous cover and the outer sleeve 14 synchronously rotate under the driving action of the spoiler 4.
When the device is installed, an inner sleeve 13 is firstly connected and fastened at a proper position of the deep sea vertical pipe 1 through a limit screw 12 of the inner sleeve, then the deep groove ball bearing 10 is fixed at a specified position of the inner sleeve, two semi-annular cylinders of an outer sleeve 14 and two semi-annular porous covers are installed through the limit screw 8, and an outer sleeve track is matched with the deep groove ball bearing 10. Two overhanging circular through holes 15 on one side of the multihole shield 3 are fixed by fixing screws 9, and then two overhanging circular through holes on the other side are butted with two groove-shaped circular through holes 16 on one side of the spoiler 4 and are connected through the fixing screws 9. The spoiler 4 is fixed to one side of the perforated cover 3. The flag 5 is then mounted in a recess in one side of the spoiler 4 by means of rivets 6. To this end, a vortex induced vibration suppression device is installed.
As shown in fig. 1, when the ocean current flows through the flexible riser and forms a certain included angle with the spoiler 4, the ocean current will impact the spoiler 4, so that the spoiler 4 drives the rear rubber streamer 5 to rotate, and the perforated cover 3 and the outer sleeve 14 are driven by the spoiler 4 to rotate by the deep groove ball bearing 10, so that the spoiler 4 is in a balanced state and the rubber streamer 5 is located below the ocean current. When the spoiler 4 is stable, the square holes outside the porous cover 3 can destroy the generation of the incoming flow on the boundary layer of the pipeline wall to a certain degree, hinder the separation of the boundary layer behind the pipeline wall and change the separation point of the boundary layer, thereby achieving the purpose of reducing the shedding of the vortex. Meanwhile, the rubber ribbons 5 act behind the ocean current, the ribbons float with the ocean current to destroy the structure of the vortex, so that the vortex cannot be regularly arranged, and the shedding frequency of the vortex is far away from the natural frequency of the pipeline, thereby inhibiting the generation of vortex-induced vibration. In a complex deep sea environment, if the direction of the ocean current changes, the spoiler 4 can be kept in the same direction as the ocean current in real time due to the action of the ocean current, the integral restraining device is driven to rotate, vortex-induced vibration is effectively restrained, and the ability of self-adapting to the direction of the ocean current is achieved.
The installation positions and the number of the invention are determined according to actual working conditions.
Claims (6)
1. A device for inhibiting vortex-induced vibration of an ocean pipeline with a ribbon is arranged at the periphery of the ocean pipeline,
it is characterized by comprising a sliding sleeve, a spoiler (4) and a streamer (5), wherein,
the sliding sleeve comprises an inner sleeve (13) and an outer sleeve (14), the inner sleeve (13) is fixed on the periphery of the marine pipeline, the inner sleeve (13) and the outer sleeve (14) are connected through a bearing (10) so that the outer sleeve (14) can rotate relative to the inner sleeve, the spoiler (4) is connected with the outer sleeve (14), and the rubber streamer (5) is connected with the spoiler (4).
2. The device according to claim 1, characterized in that it further comprises a perforated cap (3) fixed to the outside of the outer sleeve (14), the spoiler (4) being connected to the outer sleeve (14) through the perforated cap (3).
3. The apparatus of any one of claims 1 or 2, wherein the bearing is a deep groove ball bearing.
4. A device according to any one of claims 1 or 2, characterised in that the flag (5) is of rubber material.
5. Device according to any one of claims 1 or 2, characterized in that the inner sleeve (13), the outer sleeve (14) and the spoiler (4) are of plastic material.
6. Device according to claim 2, characterized in that the porous cover (3) is of plastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010072769.XA CN111140570A (en) | 2020-01-21 | 2020-01-21 | Marine pipeline vortex-induced vibration suppression device with ribbons |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010072769.XA CN111140570A (en) | 2020-01-21 | 2020-01-21 | Marine pipeline vortex-induced vibration suppression device with ribbons |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111140570A true CN111140570A (en) | 2020-05-12 |
Family
ID=70526852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010072769.XA Pending CN111140570A (en) | 2020-01-21 | 2020-01-21 | Marine pipeline vortex-induced vibration suppression device with ribbons |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111140570A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878175A (en) * | 2021-01-19 | 2021-06-01 | 苏交科集团股份有限公司 | Pier water flow resistance reducing device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134972A (en) * | 2010-12-31 | 2011-07-27 | 上海交通大学 | Device for inhibiting vortex-induced vibration of underwater standpipe of fish-tail imitating cowling |
| US9080610B1 (en) * | 2010-10-21 | 2015-07-14 | VIV Solutions LLC | Vortex suppression fairings |
| CN205225096U (en) * | 2015-11-27 | 2016-05-11 | 西南石油大学 | Suit can revolve riser vortex induced vibration suppression device of drainage strip |
| CN106869821A (en) * | 2017-01-18 | 2017-06-20 | 燕山大学 | A kind of self adaptation vortex-induced vibration suppression device with assistant shape ribbon |
| KR20180079936A (en) * | 2017-01-03 | 2018-07-11 | 대우조선해양 주식회사 | Apparatus for reducing vortex induced vibration with asymmetric structure |
| CN110671059A (en) * | 2019-09-09 | 2020-01-10 | 建湖县永维阀门钻件有限公司 | Device for restraining vortex-induced vibration of marine drilling riser and preparation method thereof |
| CN211820218U (en) * | 2020-01-21 | 2020-10-30 | 天津大学 | Marine pipeline vortex-induced vibration suppression device with ribbons |
-
2020
- 2020-01-21 CN CN202010072769.XA patent/CN111140570A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9080610B1 (en) * | 2010-10-21 | 2015-07-14 | VIV Solutions LLC | Vortex suppression fairings |
| CN102134972A (en) * | 2010-12-31 | 2011-07-27 | 上海交通大学 | Device for inhibiting vortex-induced vibration of underwater standpipe of fish-tail imitating cowling |
| CN205225096U (en) * | 2015-11-27 | 2016-05-11 | 西南石油大学 | Suit can revolve riser vortex induced vibration suppression device of drainage strip |
| KR20180079936A (en) * | 2017-01-03 | 2018-07-11 | 대우조선해양 주식회사 | Apparatus for reducing vortex induced vibration with asymmetric structure |
| CN106869821A (en) * | 2017-01-18 | 2017-06-20 | 燕山大学 | A kind of self adaptation vortex-induced vibration suppression device with assistant shape ribbon |
| CN110671059A (en) * | 2019-09-09 | 2020-01-10 | 建湖县永维阀门钻件有限公司 | Device for restraining vortex-induced vibration of marine drilling riser and preparation method thereof |
| CN211820218U (en) * | 2020-01-21 | 2020-10-30 | 天津大学 | Marine pipeline vortex-induced vibration suppression device with ribbons |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112878175A (en) * | 2021-01-19 | 2021-06-01 | 苏交科集团股份有限公司 | Pier water flow resistance reducing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211820218U (en) | Marine pipeline vortex-induced vibration suppression device with ribbons | |
| CN102134972B (en) | Device for inhibiting vortex-induced vibration of underwater standpipe of fish-tail imitating cowling | |
| CN102865044B (en) | Imitated aerofoil adaptive vortex-induced vibration suppression and resistance reduction device for underwater riser | |
| CN203515368U (en) | Riser vortex inducting vibration suppression device with rough undulating surface | |
| CN202510918U (en) | W-shaped device for inhibiting vortex induced vibration of marine riser | |
| CN106869821B (en) | A kind of adaptive vortex-induced vibration suppression device with assistant shape ribbon | |
| CN202990906U (en) | Vortex-induced vibration suppression device with rotatable spiral strakes | |
| CA2908887C (en) | Fairing | |
| CN102071883A (en) | Underwater stand pipe vortex induced vibration inhibiter adopting rotatable cowling | |
| CN101418675A (en) | Method and device for restraining vortex-induced vibration by underwater pipeline | |
| CN111140570A (en) | Marine pipeline vortex-induced vibration suppression device with ribbons | |
| CN108194035B (en) | Device and method for suppressing vortex-induced vibration of marine riser | |
| CN208430978U (en) | A kind of vortex-induced vibration of marine riser inhibition device | |
| CN112145857A (en) | Vortex-induced vibration suppression device for marine flexible riser | |
| CN104790881B (en) | A kind of vortex-induced vibration of marine riser restraining device | |
| KR20150031795A (en) | Vibration stabilizing device for lower structure of floating sea-wind generator | |
| CN204623765U (en) | A kind of chimney peculiar to vessel | |
| CN204716149U (en) | A kind of asymmetric perforate cross impeller vortex-induced vibration suppression device | |
| Wu et al. | Nominal wake fluctuation due to waves-volume mean and distribution based on CFD | |
| CN103453276B (en) | A kind of vortex-induced vibration suppression device and method that can turn separator disk with tail-rotor | |
| CN114263658B (en) | Vortex-induced vibration suppression device and method combining magnetic sliding and diversion rotation | |
| CN201391712Y (en) | Suppression device for vortex vibration of submarine pipelines | |
| CN220600805U (en) | Vortex-induced vibration suppression device for suspended-span sea pipe | |
| Lin et al. | Experimental investigation of a new device in suppressing vortex-induced vibrations of a circular cylinder | |
| CN218235062U (en) | Marine drilling casing vortex-induced vibration suppression device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |