CN105015698B - A kind of damping device for inside drill ship moon pool - Google Patents
A kind of damping device for inside drill ship moon pool Download PDFInfo
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- CN105015698B CN105015698B CN201510475160.6A CN201510475160A CN105015698B CN 105015698 B CN105015698 B CN 105015698B CN 201510475160 A CN201510475160 A CN 201510475160A CN 105015698 B CN105015698 B CN 105015698B
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- moon pool
- pool structure
- wedge
- shaped cuts
- drill ship
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
Abstract
The present invention provides a kind of damping device for inside drill ship moon pool, including the moon pool structure for the vertical through opening being arranged on drill ship ship midships section point, tilting wedge-shape diversion block is provided with front of the moon pool structure, the vertical plane of tilting wedge-shape diversion block overlaps with the forward position of moon pool structure, the rear of the moon pool structure is provided with wedge shaped cuts, and the vertical plane of the wedge shaped cuts overlaps with the rear edge of moon pool structure, the rear of the moon pool structure swings device along being above provided with two triangle form drags, and two triangle form drags swing the top that device is arranged on the vertical plane of wedge shaped cuts one on the other.The present invention can reduce the resistance of drill ship, improve economy of the drill ship during navigation.
Description
Technical field
The present invention relates to a kind of damping device, more particularly to a kind of damping device for inside drill ship moon pool, belong to
Naval Architecture and Ocean Engineering field.
Background technology
With the consumption of the landing field energy, the sight of people starts to turn to ocean from land.Develop Marine oil and gas resource, it is necessary to
Explored, the work of drilling well and production.Wherein, drill ship plays an important role in marine oil and gas drilling well work.
Drill ship is a kind of ship type floating offshore drilling platforms, and navigation mode mainly has two kinds of self-propulsion type and towage formula, can
To assemble the equipment needed for a variety of drilling wells.Unlike conventional ship type, drill ship typically had near ship midship one it is larger
Vertical through opening, this structure is referred to as moon pool structure, can be to the structure of drill ship, motion and migration from boat resistance
Etc. produce many detrimental effects.The vibration of fluid mainly has two kinds of forms in moon pool, and a kind of is vertical along hull
Motion, referred to as piston movement；Another kind is along the motion in captain direction, referred to as sloshing motion.Fluid is being transported in moon pool
In dynamic process, whirlpool is produced first at the forward position of moon pool, this whirlpool gradually develops, and is carried out towards the rear of moon pool at
Motion, when after reaching moon pool at edge, it will one big whirlpool for occupying moon pool inner most space of formation, afterwards moon pool
Forward position continues to produce whirlpool, and constantly repeats this process.
For resistance, the boat resistance certainly when having resistance during moon pool to be significantly greater than no moon pool, this is due in moon pool
Caused by additional damping caused by the vibration of fluid.Analyzed from energisation mode, cause the fluid motion in moon pool mainly to have
Two kinds of reasons.The first, when drill ship is in quiet underwater exercise, motion of the fluid in moon pool, fluid is by moon pool bottom
When, due to the unexpected interruption of Ship Structure so that fluid is flowed towards moon pool internal direction, and with the generation of whirlpool,
Again due to the presence of whirlpool, the unstability of flow of fluid in moon pool is exacerbated, and generate larger additional drag.Second
Kind, when drill ship is in Motion Waves, the fluid in moon pool is produced motion by the induction of wave.With triggering fluid in moon pool
The reason for vibration, is corresponding, and the method for reducing drill ship resistance mainly has two kinds.The principle of first method is mainly, by changing
Become and guide the motion state of fluid at moon pool mouth to reach the effect of drag reduction.The principle of second method is mainly by the moon
Install the device of plate class in pond additional, increase the damping of flowing, to hinder the motion of fluid, so as to reach the purpose of drag reduction.
The content of the invention
The invention aims to reduce the resistance of drill ship, improve economy of the drill ship during navigation and carry
For a kind of damping device for inside drill ship moon pool.
The object of the present invention is achieved like this：The vertical through opening divided including being arranged on drill ship ship midships section
Moon pool structure, tilting wedge-shape diversion block, the vertical plane of tilting wedge-shape diversion block are provided with front of the moon pool structure
Overlapped with the forward position of moon pool structure, the rear of the moon pool structure is provided with wedge shaped cuts, and the vertical plane of the wedge shaped cuts
Rear along overlapping with moon pool structure, the rear of the moon pool structure swings device, and two triangles along being above provided with two triangle form drags
Form drag swings the top that device is arranged on the vertical plane of wedge shaped cuts one on the other.
Present invention additionally comprises some such architectural features：
1. the key groove of the tilting wedge-shape diversion block is 8 ° to 12 ° of acute angle, the length of tilting wedge-shape diversion block
When moon pool structure length 15% to 25%, the width of tilting wedge-shape diversion block is identical with the width of moon pool structure.
2. the key groove of the wedge shaped cuts is 8 ° to 12 ° of acute angle, moon pool structure length during the length of wedge shaped cuts
15% to 25%, the width of wedge shaped cuts is identical with the width of moon pool structure.
3. the section that the triangle form drag swings device is isosceles right triangle, and the length of side of isosceles right triangle is the moon
The 7% to 10% of the length of pool structure, the width that triangle form drag swings device is identical with the width of moon pool structure, the triangle of lower section
Resistance swings the level right angle of device while with along the distance of intersection being isosceles right triangle after wedge shaped cuts and moon pool structure
Long 0% to 50%, the level that the triangle form drag on level right angle side and lower section that the triangle form drag of top swings device swings device are straight
The distance of the arm of angle is the 125% to 175% of the length of side of isosceles right triangle.
Compared with prior art, the beneficial effects of the invention are as follows：1st, have by tilting wedge-shape diversion block and wedge shaped cuts
The flow of fluid guided near moon pool of effect, efficiently reduce influence of the whirlpool to fluid in moon pool at moon pool forward position.
2nd, the flat side that device bottom is swung by triangle form drag effectively hinders the flowing of moon pool internal flow, and the hypotenuse on top can be
When moon pool internal liquid level changes, fluid can be able to smoothly flow back into initial position, be reached with increasing the principle of flow damping
Reduce the effect of drill ship resistance.3rd, lower resistance swings device installation site in the top of wedge shaped cuts, can be as wedge shaped cuts
Extension, increase the effect of guiding, device is swung in upper resistance can effectively hinder the fluctuation of fluid installed in the top that device is swung in lower resistance, make
Drill ship resistance reduces.4th, the drag-reduction effect of this kind of damping device is verified by CFD method, analog result show with
This kind of damping device is not installed to compare, the resistance for installing the drill ship of damping device reduces 4.24%.5th, the design is a kind of quilt
Ejector half damping device, the normal operation and equipment for not influenceing drill ship are launched, simple and convenient, are a kind of practical drag reduction schemes.
Brief description of the drawings
Fig. 1 is the vertical section schematic side view of the present invention；
Fig. 2 is the upward view of the present invention；
Fig. 3 is the structural representation of the tilting wedge-shape diversion block of the present invention；
Fig. 4 is that the triangle form drag of the present invention swings the structural representation of device (device is swung in upper triangular resistance)；
Fig. 5 is that the triangle form drag of the present invention swings the structural representation of device (device is swung in lower triangular resistance).
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.
With reference to Fig. 1 to Fig. 5, the present invention relates to a kind of damping device of drill ship in moon pool, is led by a tilting wedge shape
Stream block, two triangle form drags swing device and a wedge shaped cuts form, and according to motion state of the fluid in moon pool, propose drag reduction
Device.The installation site of tilting wedge-shape diversion block first in the front of drilling well boat bottom moon pool, baffle vertical direction
Right-angle side overlaps with the forward position of moon pool, passes through the direction of the angulation change flow of fluid of device, the stream of guiding moon pool surrounding fluid
It is dynamic, reduce influence of the vortex outside moon pool to moon pool internal flow, reach drag-reduction effect.But this tilting wedge-shape diversion
The presence of block also brings along some reverse effects, and the flowing of meeting convection body, which produces, hinders effect, and this obstruction effect can cause
The increase of drill ship resistance, when inhibition is more than guiding function, the effect of drag reduction can be lost, therefore take a less angle
Spend (8 °~12 °), length is the 15%~25% of moon pond length, and width is with moon pool with wide.The thought for arranging wedge shaped cuts is logical
Angled grooving is crossed after moon pool at edge to guide the flowing of fluid, makes guiding of a part of fluid by grooving to moon pool
Flows outside, reduce influence of the moon pool external fluid to moon pool internal flow, reach drag-reduction effect, angle is 8 °~12 °, length
For the 15%~25% of moon pond length, width is with moon pool with wide.Two triangle form drags swing device and are arranged in the rear at of moon pool,
By with installation site difference be divided into it is upper resistance swing device with it is lower resistance swing device, device horizontal direction right-angle side and wedge shaped cuts are swung in lower resistance
The distance on moon pool boundary side swings the 0%~25% of device right-angle side size for resistance, and device horizontal direction right-angle side distance is swung in upper resistance
Lower resistance swings device horizontal direction right-angle side distance and swings the 125%~175% of device right-angle side size for resistance.Device is swung in two resistances
Size is identical, and angle is 45 °, length with it is highly equal be the 7%~10% of moon pond length, width and moon pool width together.Arrangement three
The thinking of angular retention device mainly prevents the flow of fluid inside moon pool by the flat side of triangle damping block bottom, and
The hypotenuse on its top is in order to which when moon pool internal liquid level changes, fluid can be able to smoothly flow back into initial position.Lower resistance is swung
The installation site of device in the top of wedge shaped cuts, can regard as to after moon pool along excision chamfering extension, that is to say, that
Lower resistance swings device in addition to the motion for playing the role of to hinder fluid, also there is guiding.It is upper to hinder the installation position for swinging device
The top that device is swung in lower resistance is put, mainly reaches the effect of reduction drill ship resistance by hindering the flowing of fluid.
In the flowing of reality, a part of fluid swings by tilting wedge-shape diversion block, wedge shaped cuts with lower triangle form drag
Device (guiding, flows out the scope of moon pool, excessive influence is not produced to fluid in moon pool.Another part fluid does not have quilt
Guiding is gone out, and is continued to moon pool internal flow, and drives the fluid in moon pool to be moved, by upper triangle form drag swing device with
Lower triangle form drag swings the obstruction of device, reduces the motion amplitude of fluid, so as to reach the effect for reducing drill ship resistance.
Claims (3)
1. a kind of damping device for inside drill ship moon pool, including be arranged on vertical through on drill ship ship midships section point
The moon pool structure of opening, it is characterised in that：Tilting wedge-shape diversion block, tilting wedge are provided with front of the moon pool structure
The vertical plane of shape baffle overlaps with the forward position of moon pool structure, and the rear of the moon pool structure is provided with wedge shaped cuts, and described
The vertical plane of wedge shaped cuts and moon pool structure it is rear along overlapping, the rear of the moon pool structure is swung along being above provided with two triangle form drags
Device, and two triangle form drags swing the top that device is arranged on the vertical plane of wedge shaped cuts one on the other；The triangle form drag is swung
The section of device is isosceles right triangle, and the right angle length of side of isosceles right triangle be the length of moon pool structure 7% to
10%, the width that triangle form drag swings device is identical with the width of moon pool structure, and the triangle form drag of lower section swings the level right angle of device
It is the 0% to 50% of the right angle length of side of isosceles right triangle along the distance of intersection after side and wedge shaped cuts and moon pool structure,
The triangle form drag of top swings distance of the level right angle of device when the triangle form drag with lower section swings the level right angle of device
The 125% to 175% of the right angle length of side of waist right angled triangle.
A kind of 2. damping device for inside drill ship moon pool according to claim 1, it is characterised in that：The inclination
The key groove that formula wedge-shape diversion block and horizontal direction are formed is 8 ° to 12 ° of acute angle, the moon during length of tilting wedge-shape diversion block
The 15% to 25% of pool structure length, the width of tilting wedge-shape diversion block are identical with the width of moon pool structure.
A kind of 3. damping device for inside drill ship moon pool according to claim 1 or 2, it is characterised in that：It is described
The key groove that wedge shaped cuts are formed with horizontal direction is 8 ° to 12 ° of acute angle, and the length of wedge shaped cuts is moon pool structure length
15% to 25%, the width of wedge shaped cuts is identical with the width of moon pool structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510475160.6A CN105015698B (en) | 2015-08-06 | 2015-08-06 | A kind of damping device for inside drill ship moon pool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510475160.6A CN105015698B (en) | 2015-08-06 | 2015-08-06 | A kind of damping device for inside drill ship moon pool |
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| Publication Number | Publication Date |
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| CN105015698A CN105015698A (en) | 2015-11-04 |
| CN105015698B true CN105015698B (en) | 2018-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510475160.6A Active CN105015698B (en) | 2015-08-06 | 2015-08-06 | A kind of damping device for inside drill ship moon pool |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105416521B (en) * | 2015-12-14 | 2017-06-23 | 江苏科技大学 | Platform moon pool damping device |
| CN107364552A (en) * | 2016-05-13 | 2017-11-21 | 上海船厂船舶有限公司 | Drill ship |
| CN110040213B (en) * | 2019-04-15 | 2021-10-08 | 深圳市山年科技有限公司 | Fluid shunt resistance-reducing device |
| CN113086084A (en) * | 2021-04-22 | 2021-07-09 | 天津大学 | Damping reduction device for reducing additional damping of moon pool at different ship speeds |
| CN113184108A (en) * | 2021-05-25 | 2021-07-30 | 天津大学 | Do benefit to pipe laying ship moon pool of drag reduction and optimize structure |
| CN113232765A (en) * | 2021-05-25 | 2021-08-10 | 天津大学 | Hollow device for reducing additional resistance of moon pool |
Citations (6)
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|---|---|---|---|---|
| CN101331054A (en) * | 2006-05-11 | 2008-12-24 | 三星重工业株式会社 | Anti-sloshing device in moon pool |
| CN202935532U (en) * | 2012-11-21 | 2013-05-15 | 中国船舶工业集团公司第七〇八研究所 | Moon pool capable of reducing sailing resistance of drilling ship and shipping waves of midship |
| EP2623415A1 (en) * | 2010-09-29 | 2013-08-07 | Daewoo Shipbuilding&Marine Engineering Co., Ltd. | Locking device for a damping apparatus for a moon pool |
| CN103282272A (en) * | 2010-10-08 | 2013-09-04 | 大宇造船海洋株式会社 | Damping apparatus for moonpool |
| CN103748006A (en) * | 2012-07-20 | 2014-04-23 | 现代重工业株式会社 | Drillship having block for preventing vortex with concave type flow stabilizer part in moonpool |
| CN204846279U (en) * | 2015-08-06 | 2015-12-09 | 哈尔滨工程大学 | A fairing for inside moon pool |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101259718B1 (en) * | 2011-06-14 | 2013-04-30 | 현대중공업 주식회사 | Drillship with combining form of moonpool structure considering additional resistance control |
| KR101956681B1 (en) * | 2012-11-23 | 2019-03-11 | 대우조선해양 주식회사 | Moon pool apparatus for drillship |
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2015
- 2015-08-06 CN CN201510475160.6A patent/CN105015698B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101331054A (en) * | 2006-05-11 | 2008-12-24 | 三星重工业株式会社 | Anti-sloshing device in moon pool |
| EP2623415A1 (en) * | 2010-09-29 | 2013-08-07 | Daewoo Shipbuilding&Marine Engineering Co., Ltd. | Locking device for a damping apparatus for a moon pool |
| CN103282272A (en) * | 2010-10-08 | 2013-09-04 | 大宇造船海洋株式会社 | Damping apparatus for moonpool |
| CN103748006A (en) * | 2012-07-20 | 2014-04-23 | 现代重工业株式会社 | Drillship having block for preventing vortex with concave type flow stabilizer part in moonpool |
| CN202935532U (en) * | 2012-11-21 | 2013-05-15 | 中国船舶工业集团公司第七〇八研究所 | Moon pool capable of reducing sailing resistance of drilling ship and shipping waves of midship |
| CN204846279U (en) * | 2015-08-06 | 2015-12-09 | 哈尔滨工程大学 | A fairing for inside moon pool |
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| CN105015698A (en) | 2015-11-04 |
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