CN104724248B - Damping plate structure reducing surging of fluid in cavity of moon pool - Google Patents
Damping plate structure reducing surging of fluid in cavity of moon pool Download PDFInfo
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- CN104724248B CN104724248B CN201510100178.8A CN201510100178A CN104724248B CN 104724248 B CN104724248 B CN 104724248B CN 201510100178 A CN201510100178 A CN 201510100178A CN 104724248 B CN104724248 B CN 104724248B
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- moon pool
- damping plate
- damping sheet
- ship
- perforate
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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
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Abstract
The invention belongs to the technical field of ship moon pools, and relates to a ship moon pool structure, in particular to a damping plate structure reducing the surging of fluid in a cavity of a moon pool. The damping plate structure is characterized by comprising a horizontal damping plate and a vertical damping plate; the vertical damping plate and the horizontal damping plate are provided with holes respectively, water flow enters the area between the vertical damping plate and the horizontal damping plate, and then the surging of the water flow is reduced; ventilation pipelines communicated with the outside atmosphere are arranged on the side face of an air cushion area between a moon pool top cover and a free surface in the moon pool. Because the ventilation pipelines communicated with the outside atmosphere are arranged on the side wall of the air cushion area, the pressure of the air cushion area is the same as outside pressure, the waving of water inside the moon pool is synchronized with the waving of water outside a ship as far as possible, and the surging of the water flow is reduced. In this way, the sailing resistance is reduced, and the power consumption of a motor is lowered.
Description
Technical field
It is a kind of to reduce the damping that moon pool cavity fluid is agitated specifically the present invention relates to a kind of ship moon pool structure
Hardened structure, belongs to ship moon pool technical field.
Background technology
On the ocean engineering operation ships such as drill ship, paving cable ship, investigation vessel, it is required for setting the moon pool through hull, with
It is easy to the development of correlation engineering operation, operation moon pool is with square in the majority.Moon pool inner chamber is connected with seawater, can because ship's navigation and
Phenomenon is agitated in waves of seawater motion generation.Moon pool inwall plays a part of also not under different structure type to fluid excitation
Together, it is widely different.Fluid in moon pool can be serious broken to operation facility or the activity generation set in moon pool when agitating violent
Go bad and threaten safety.At present, to setting perforate without bottom moon pool inner chamber wall and having use without leg in perforate.Nothing is set
The form of leg can aggravate the vibration of moon pool cavity fluid under certain condition in perforate；Perforate damping sheet method is set although to adopt
With more, but damping sheet structure type and damping in current specification all without corresponding specified content and assessment side
Method, does not have a kind of structure type of determination and perforate to arrange that design structure miscellaneous obtains damping and do not know.Cause
This, to reduce infringement and raising job safety that fluid in moon pool agitated, reduced operation facility in moon pool, research and design is a kind of
Simple structure, the moon pool damping sheet structure type of best results are just necessary.
The content of the invention
In ship's navigation during marine and operation, due to the influence that wave and ship motion are caused, the stream in moon cell cavity
Know from experience to be formed and moved along upper and lower " piston " motion of moon pool depth direction and " rocking " of horizontal direction.Due to moon pool cavity fluid
Motion is asynchronous with the outer wave motion of hull, and fluid oscillating has the phenomenon of aggravation in moon pool, and moon pool can be impacted when serious
Top cover or the upper wave of moon pool mouthful.According to current Ship Design present situation, damping sheet is set in moon cell cavity, the effect of damping sheet and perforate
It is how many related, but because lacking Related Computational Methods and design verification at present, damping sheet form has very big difference, and damping is not
It is identical to the greatest extent.And damping sheet also has a certain impact to Ship Resistance.Particularly the big moon pool of length and width size is to the certain boat of ship
Drag effects under speed are larger.
It is an object of the invention to reduce swashing for moon pool cavity fluid by the transformation to the internally-damped hardened structure of moon pool
Degree is swung, so as to reduce resistance of the moon pool to ship's navigation.
The present invention takes following technical scheme：
A kind of to reduce the damping sheet structure that moon pool cavity fluid is agitated, the damping sheet structure includes horizontal damping plate, hangs down
To damping sheet；Equal perforate on vertical damping sheet, horizontal damping plate, current enter the area between vertical damping sheet and horizontal damping plate
Domain, so as to mitigate current agitate；Air cushion area side in moon pool top cover and moon pool between free surface opens up leads to outside atmosphere
Ventilative pipeline.
Because moon pool has top cover, therefore top cover lower section and the air cushion area above the water surface are as a rule a closed gas
Body space, when the draft of hull changes, air cushion area can produce malleation or the negative pressure, this malleation or negative pressure to cause
The water body nonsynchronous fluctuation of generation outside water body and ship inside moon pool, this asynchronous fluctuation can increase water body in moon pool
Agitate degree, so as to increase the resistance of ship's navigation, increase the power consumption of motor.The technical program is by the side wall in air cushion area
On open up the ventilative pipeline for leading to outside atmosphere so that air cushion area is identical with external pressure, make the ripple of moon pool inside water body
It is dynamic as synchronous as possible with the fluctuation of ship outside body of water, reduce current and agitate, so as to reduce ship resistance, reduce motor power consumption.
Further, the ventilative pipeline is arranged on four upper corners of moon pool inwall, and with two topside atmospheres.
Further, the area ratio of vertical damping sheet perforate is 15%.
Further, the spacing between vertical damping sheet and moon pool outer wall is 1.4 meters, is twice aggregate spacing.
Further, the shape of the vertical damping sheet perforate is rounded or ellipse.
The beneficial effects of the present invention are：
1) substantially reduce moon pool inside water body agitates degree, reduces ship resistance, reduces motor power consumption.
2) by the perforate on moon pool inwall, current are made to enter the region between vertical damping sheet and horizontal damping plate, from
Another angle reduction current agitate degree.
3) area ratio of vertical damping sheet perforate is preferably 15%, and experiment proves that the effect that reduction current are agitated is more preferable.
4) gas pipeline with ft connection is arranged on four upper corners of moon pool inwall, and with two topside atmospheres,
Structure setting is more reasonable, convenient, and it is more preferable that the gas in air cushion area exchanges the effect for circulating with extraneous gas.
Brief description of the drawings
Fig. 1 is moon pool along hull longitudinal profile schematic diagram.
Fig. 2 is moon pool along hull horizontal section schematic diagram.
Fig. 3 is the ventilative schematic diagram (moon pool upper end corner arrangement) of moon pool top outboard.
Fig. 4 is moon pool madial wall perforate schematic diagram (perforate 15%, be evenly arranged).
Fig. 5 is the schematic diagram of perforate on moon pool horizontal damping plate.
Specific embodiment
The present invention is further described with specific embodiment below in conjunction with the accompanying drawings.
Referring to Fig. 1-Fig. 5, a kind of damping sheet structure that reduction moon pool cavity fluid is agitated, the damping sheet structure includes water
Flat damping sheet, vertical damping sheet；Equal perforate on vertical damping sheet, horizontal damping plate, current enter vertical damping sheet and are hindered with level
Region between Buddhist nun's plate, so as to mitigate current agitate；Air cushion area side in moon pool top cover and moon pool between free surface opens up
Lead to the ventilative pipeline of outside atmosphere.
Referring to Fig. 2-Fig. 3, the ventilative pipeline is arranged on four upper corners of moon pool inwall, and with two topside atmospheres.
Referring to Fig. 4, the area ratio of vertical damping sheet perforate is 15%.
Spacing between vertical damping sheet and moon pool outer wall is 1.4 meters, is twice aggregate spacing.
Referring to Fig. 4, the shape of the vertical damping sheet perforate is rounded or ellipse.
Because moon pool has top cover, therefore top cover lower section and the air cushion area above the water surface are as a rule a closed gas
Body space, when the draft of hull changes, air cushion area can produce malleation or the negative pressure, this malleation or negative pressure to cause
The water body nonsynchronous fluctuation of generation outside water body and ship inside moon pool, this asynchronous fluctuation can increase water body in moon pool
Agitate degree, so as to increase the resistance of ship's navigation, increase the power consumption of motor.The technical program is by the side wall in air cushion area
On open up the ventilative pipeline for leading to outside atmosphere so that air cushion area is identical with external pressure, make the ripple of moon pool inside water body
It is dynamic as synchronous as possible with the fluctuation of ship outside body of water, reduce current and agitate, so as to reduce ship resistance, reduce motor power consumption.
The present invention substantially reduces moon pool inside water body and agitates degree, reduces ship resistance, reduces motor power consumption；It is logical
The perforate on moon pool inwall is crossed, current is entered the region between vertical damping sheet and horizontal damping plate, from the reduction of another angle
Current agitate degree；The area ratio of vertical damping sheet perforate is preferably 15%, and the effect that experiment proof reduction current are agitated is more
It is good；Gas pipeline with ft connection is arranged on four upper corners of moon pool inwall, and with two topside atmospheres, structure setting
More rationally, convenient, it is more preferable that the gas in air cushion area exchanges the effect for circulating with extraneous gas.
The moon pool damping structure of this form by leg in horizontal damping plate, vertical damping perforate, watertight vertical peripheral walls, on
End corner sets the ventilative pipeline composition for leading to topside.Horizontal damping plate perforate as shown in Figure 5 more than double bottom, vertical damping
Plate perforate as shown in Figure 4, perforated area is controlled in 15% ratio.Inside and outside leg spacing is 1.4 meters (2 times of aggregate spacing), should
Scope composition abatement wave agitates the damping cavity of impact, plays a part of wave absorption and subtract to swing, the ventilative pipeline of upper end can balance because
The air cushion pressure change that fluid heave movement is caused in moon pool, reduces the incentive action to wave making in moon pool, this moon pool
Damping structure is configured, and is the result by multivariant assay optimization.The method that the design passes through model test, research and probe subtracts
The approach of small moon pool vibration, to the stream Induced Oscillation Phenomena Observation in moon pool and analysis, contrasts and analysis different structure arrangement
Experimental data, it is determined that the preferred plan shown in above figure, i.e., this by diagram 15% perforate ratio moon pool damp it is hardened
Structure, than other perforate ratios and the fluctuation pressure without opening approach is small, the abatement effect to wave is good compared with other schemes, generation
Resistance is minimum, can reach the effect of required under low cruising speed propeller power reduction about 2% in.
The present invention can most effectively reduce the stream exciting in moon pool on the premise of any equipment and construction cost is not increased
Swing, reduce because of the Ship Resistance that moon pool is produced, be conducive to ship's navigation, reducing energy consumption.Implement simple, beneficial to shipbuilding.
Claims (1)
- It is 1. a kind of to reduce the damping sheet structure that moon pool cavity fluid is agitated, it is characterised in that：The damping sheet structure includes horizontal damping plate, vertical damping sheet；Equal perforate on vertical damping sheet, horizontal damping plate, current enter the region between vertical damping sheet and horizontal damping plate, from And mitigate current and agitate；Air cushion area side in moon pool top cover and moon pool between free surface opens up the ventilative pipeline for leading to outside atmosphere；The ventilative pipeline is arranged on four upper corners of moon pool inwall, and with two topside atmospheres；The area ratio of vertical damping sheet perforate is 15%；Spacing between vertical damping sheet and moon pool outer wall is 1.4 meters, is twice aggregate spacing；The shape of the vertical damping sheet perforate is rounded or ellipse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510100178.8A CN104724248B (en) | 2015-03-06 | 2015-03-06 | Damping plate structure reducing surging of fluid in cavity of moon pool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510100178.8A CN104724248B (en) | 2015-03-06 | 2015-03-06 | Damping plate structure reducing surging of fluid in cavity of moon pool |
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| Publication Number | Publication Date |
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| CN104724248A CN104724248A (en) | 2015-06-24 |
| CN104724248B true CN104724248B (en) | 2017-05-24 |
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| CN201510100178.8A Active CN104724248B (en) | 2015-03-06 | 2015-03-06 | Damping plate structure reducing surging of fluid in cavity of moon pool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020172984A1 (en) * | 2019-02-27 | 2020-09-03 | 招商局重工（江苏）有限公司 | Drag-reducing separator plate and design method therefor |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107226171A (en) * | 2017-05-17 | 2017-10-03 | 福建省马尾造船股份有限公司 | A kind of moon pool lid |
| CN108749998B (en) * | 2018-05-23 | 2020-07-31 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Diving moon pool and ship |
| CN109501949A (en) * | 2018-09-30 | 2019-03-22 | 江苏科技大学 | A kind of drill ship moon pool damping device |
Citations (5)
| 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 |
| CN103269948A (en) * | 2010-07-27 | 2013-08-28 | 大宇造船海洋株式会社 | Ventilation apparatus of a drillship |
| CN103879520A (en) * | 2014-03-13 | 2014-06-25 | 上海船舶研究设计院 | Wave absorbing type saturation diving moon pool |
| CN104340331A (en) * | 2013-07-31 | 2015-02-11 | 中国船舶工业集团公司第七〇八研究所 | Device for reducing navigation resistance on ship with moon pool |
| CN204548389U (en) * | 2015-03-06 | 2015-08-12 | 上海船舶研究设计院 | Reduce the damping panel structure that moon pool cavity fluid agitates |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101468532B1 (en) * | 2011-07-14 | 2014-12-03 | 대우조선해양 주식회사 | Drillship capable of opening and closing in BOP operating area |
-
2015
- 2015-03-06 CN CN201510100178.8A patent/CN104724248B/en active Active
Patent Citations (5)
| 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 |
| CN103269948A (en) * | 2010-07-27 | 2013-08-28 | 大宇造船海洋株式会社 | Ventilation apparatus of a drillship |
| CN104340331A (en) * | 2013-07-31 | 2015-02-11 | 中国船舶工业集团公司第七〇八研究所 | Device for reducing navigation resistance on ship with moon pool |
| CN103879520A (en) * | 2014-03-13 | 2014-06-25 | 上海船舶研究设计院 | Wave absorbing type saturation diving moon pool |
| CN204548389U (en) * | 2015-03-06 | 2015-08-12 | 上海船舶研究设计院 | Reduce the damping panel structure that moon pool cavity fluid agitates |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020172984A1 (en) * | 2019-02-27 | 2020-09-03 | 招商局重工（江苏）有限公司 | Drag-reducing separator plate and design method therefor |
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| CN104724248A (en) | 2015-06-24 |
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