CN104554618B - Wide-body double hull board side double bottom ship based on large-opening PMA (Permanent Means of Access) in ballast tank - Google Patents
Wide-body double hull board side double bottom ship based on large-opening PMA (Permanent Means of Access) in ballast tank Download PDFInfo
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- CN104554618B CN104554618B CN201410825503.2A CN201410825503A CN104554618B CN 104554618 B CN104554618 B CN 104554618B CN 201410825503 A CN201410825503 A CN 201410825503A CN 104554618 B CN104554618 B CN 104554618B
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Abstract
The invention discloses a wide-body double hull board side double bottom ship based on a large-opening PMA (Permanent Means of Access) in a ballast tank. A board side and a bottom comprise a double-shell shell; horizontal girders of symmetric structures are arranged between an inner shell (1) and an outer shell (2) of the board side. The invention aims at the improvement of the horizontal girders when the distance C of the inner shell and the outer shell is greater than 5 m of the board side. PMA openings are spaced from one another in each horizontal girder; the area of the MPA openings is 30 percent greater than the horizontal sectional area of a three-dimensional structure defined by the inner shell, the outer shell, a front rib plate (10) and a rear rib plate (9). By designing the PMA structure integrated on the horizontal girder structure, the requirement on related specification of the PMA is met; the yield strength and the buckling strength of the structure are guaranteed through effective analytical calculation. The welding workload and the lightship weight are effectively reduced while the yield strength and the buckling strength are met, and the steel utilization rate is improved. Thus, the ship has the advantages of low cost and high strength.
Description
Technical field
The present invention relates to Ship Design, more particularly, it relates in ballast tank in the double topside ship of expanded letter PMA improvement.
Background technology
As shown in figure 1, a kind of general structure of the double topside of cross section expanded letter of wide double topside ship ship types, there is expanded letter double
The ship of outer bottom in topside, Double bottom and inclination, in particular, its bivalve width C is more than the half that 5m is less than the beam；In tilting
Bottom 19 and tilt outer bottom 20 and be parallel to each other, and with horizontal base line included angle A, 10 °<A<45°.
Present invention is generally directed to the improvement that ship shown in Fig. 1 does, especially for bivalve as shown in Figure 3 apart from C (inner shell 1
With shell 2 distance) more than ship during 5m, the improvement done.This ship type has the double ship side structure of special expanded letter more than 5m, by
The ballast water capacity being loaded in it is less, so in the form of tilting inner bottom, this ship type has functions that energy saving.
In prior art, horizontal girder perforate only meets code requirement, as shown in Fig. 2 the distance between inner shell 1 and shell 2
Less than 5m, generally 2m to 3.5m, twice longitudinal direction stiffener 8 is equally spaced on inner shell 1 to shell 2 position from inside to outside
With 9, have the aperture of flowing water between longitudinal stiffener 8 and 9, in order to meet intensity requirement, add around aperture and laterally help
Strong material 3 and 4；Perforated area D is less than the strong border of rectangle being surrounded by inner shell 1, shell 2, front floor 10 and rear floor 9
The 5% of region area.Usually it is mixed with a large amount of silts due in ballast tank water, because perforated area is less, can be by during current flowing
Sedimentation, in horizontal girder structure, is accumulated over a long period, and leads to ship side structure in cargo hold area heavier, calculated bending moment and true moment of flexure phase
Difference is larger, and surrender and buckling strength are not enough.
Wherein, strong structure border mentioned above section is that PMA aperture area on horizontal girder accounts for by inner shell 1, shell 2, front
The vertical section (abbreviation strong structure border section) of the stereochemical structure that square floor 10 and rear floor 9 are surrounded.
Content of the invention
The invention provides a kind of double ballast wing tank floor big opening of special expanded letter designs, its purpose is intended to saving steel
On the premise of, reduce welding job amount and light weight；And by optimizing the longitudinally size with lateral connection circular arc, increased
Opening panel, it is to avoid in the problem that the operation process opening strength of oil carrier is not enough；Tapping arranging plate, effectively delivering should
Power, it is to avoid problem of stress concentration；The horizontal girder structure of the present invention functionally can serve as permanent access path (PMA, forever
Property access path long) use.
In order to achieve the above object, the present invention provides a kind of double topside of expanded letter based on big opening PMA in ballast tank double-deck
Bottom ship, topside and bottom include double Shell, are provided with the horizontal girder of symmetrical configuration, in topside between topside inner shell and shell
Shell is more than 5m with shell distance C；Interval setting PMA opening on each described horizontal girder, described PMA aperture area is more than by interior
Shell, the 30% of the horizontal section area of shell, front floor and the surrounded stereochemical structure of rear floor.
PMA opening on described horizontal girder is limited by following manner：
Arrange first longitudinal direction stiffener and second longitudinal direction stiffener between PMA opening and inner shell from inside to outside, PMA opening with
The 3rd longitudinal stiffener and the 4th longitudinal stiffener is arranged from inside to outside between shell；Between inner shell and first longitudinal direction stiffener
It is equally spaced the first horizontal stiffener and the second horizontal stiffener, be equally spaced between shell and the 3rd longitudinal stiffener
3rd horizontal stiffener and the 4th horizontal stiffener；PMA opening and in front of it between floor arrange the 5th horizontal stiffener；PMA
The 6th horizontal stiffener is arranged between opening and its rear floor；The 5th is arranged between front floor and the 5th horizontal stiffener
Longitudinal stiffener；The longitudinal stiffener of arrangement the 6th between rear floor and the 6th horizontal stiffener；Described longitudinally, laterally aid the strong
Material end is cut tiltedly using 25 °；PMA opening corner is the arc transition of 14C/100 by radius R；4th longitudinal stiffener and shell
Spacing L1 be more than or equal to 13C/100；Spacing L2 of the 3rd longitudinal stiffener and the 4th longitudinal stiffener is more than or equal to 10C/
100；PMA edge of opening and the 3rd longitudinal stiffener be more than or equal to 5C/100 apart from L3；PMA edge of opening is away from rear floor
Distance, and PMA edge of opening away from front floor apart from L4 be more than or equal to 600mm.
Under optimal way, the described 6th longitudinal stiffener and the 5th longitudinal stiffener are arranged in described inner shell and described shell
Middle part.
The present invention by being designed together in the PMA structure of horizontal girder structure to collection, that is, meets wanting of PMA related specifications
Ask, further through effective analytical calculation it is ensured that the surrender of structure and buckling strength.And meeting surrender and buckling strength
Meanwhile, effectively reduce welding job amount and light weight, improve steel utilization ratio.Therefore the present invention has low cost, strong
Spend high advantage.
Brief description
Fig. 1 is the vertical section schematic diagram that prior art tilts double bottom ship ship type.
Fig. 2 is the PMA version schematic diagram being integrated in horizontal girder that prior art topside width is less than 5m.
Fig. 3 is the schematic diagram of ship side structure in Fig. 1, and it connects inner shell with the planar structure of shell is shown in Fig. 4.
Fig. 4 is the PMA version schematic diagram being integrated in horizontal girder that topside width of the present invention is more than 5m.
Fig. 5 is PMA structural upright schematic diagram in the double ballast wing tank of the special expanded letter of the present invention.
Fig. 6 is longitudinally, laterally stiffener pole ends chamfering schematic diagram.
Specific embodiment
Be based on as shown in Figure 4 the ship that in the double ballast wing tank of special expanded letter, PMA (permanent passage) designs, when bivalve away from
From C, that is, inner shell 1 and shell 2 are apart from more than adopting this structure design during 5m；Collection is long-range together in the opening of the PMA on horizontal girder
In traditional open design；Big opening part arranges panel 17；Between big opening and inner shell 1, arrangement twice longitudinal direction stiffener 7,8, opens greatly
Arrangement twice longitudinal direction stiffener 5,6 between mouth and shell 2；Meanwhile, it is equally spaced two between inner shell 1 and longitudinal stiffener 7
The horizontal stiffener in road 11,12, is equally spaced the horizontal stiffener of twice 13,14 between shell 2 and longitudinal stiffener 5；Open greatly
Horizontal stiffener 4 mouthful together with arranging between floor in front of it 10, meanwhile, arrange between big opening and its rear floor 9 together with
Laterally stiffener 3；Longitudinal stiffener 16 together with arranging between floor 10 and horizontal stiffener 4；In floor 9 and horizontal stiffener
Arrangement longitudinal stiffener 15 together between 3；Longitudinally, laterally stiffener pole ends chamfering, as shown in Figure 6.
The big opening longitudinally radius R a size of 14C/100 with lateral connection circular arc；Structure is arranged as being arranged symmetrically；It is full
Foot surrender and the requirement of buckling strength, will meet 13C/ in the spacing L1 minimum of longitudinal stiffener nearest away from shell and shell
100；The spacing L2 minimum of adjacent longitudinal stiffener will meet 10C/100；Opening both sides longitudinal direction stiffener is with extended distance L3
Little 5C/100 to be met；Level, longitudinal stiffener end are cut tiltedly using 25 °；Large opening area D accounts for aforementioned strong structure border section
Region area be more than 30%.
For meeting PMA aisle design specification requirement, big opening edge away from its rear floor and front floor apart from L4
Little 600mm to be met, simultaneously in middle part arrangement together longitudinal stiffener, to meet buckling strength requirement.
, by said structure finite element analyses taking few ballast water ship type as a example, and the assessment to multiple arrangements, design
Go out the version of optimum；Concrete numerical value is as follows, big opening longitudinally radius size 770mm with lateral connection circular arc；Away from shell
Nearest longitudinal stiffener is 700mm with spacing L1 of shell, spacing L2500mm of adjacent longitudinal stiffener, between this grade
Away from the transmission being designed with beneficial to surrender and buckling stress；Opening both sides longitudinal direction stiffener and extended distance L3 are 310m；Laterally, indulge
Cut tiltedly to stiffener end using 25 °；Big opening part arranges panel；The region area that large opening area accounts for strong structure border is more than
30%；The distance between big opening and its rear floor 9 are 600mm；The distance away from front floor 10 for the big opening is 600mm；Water
In the structure of flat purlin, big opening adopts circular arc type panel, effectively delivers load, reduces stress concentration.
Fig. 5 illustrates particular location on ship side structure for Fig. 4 structure, and in Fig. 5, shadow region is the letter of Fig. 4 structure chart
Change and illustrate.In Fig. 5, marked inner shell 1 and marked inner shell 1 in shell 2 Fig. 4 are corresponded with shell 2.In Fig. 5 shadow region structure with
In Fig. 4, structure is consistent, has longitudinal stiffener and horizontal stiffener arrangement, and large opening area accounts for the area surface on aforementioned strong structure border
Amass and be more than 30%.
As shown in fig. 6, longitudinally all cutting biassed fabric using this kind of with horizontal stiffener in this patent, that is, end 99 height is taken as
15mm, and it is taken as 30～40mm away from structure distance, pole ends chamfering angle is taken as 25 °.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope of present disclosure, technology according to the present invention scheme and its
Inventive concept equivalent or change in addition, all should be included within the scope of the present invention.
Claims (2)
1. the double topside double bottom ship of a kind of expanded letter based on big opening PMA in ballast tank, topside and bottom include double Shell,
Be provided with the horizontal girder of symmetrical configuration between topside inner shell (1) and shell (2) it is characterised in that
Topside inner shell (1) is more than 5m with shell (2) apart from C；
Interval setting PMA opening on each described horizontal girder, described PMA aperture area is more than by inner shell (1), shell (2), front
The 30% of the horizontal section area of floor (10) and the surrounded stereochemical structure of rear floor (9)；
PMA opening on described horizontal girder is limited by following manner：
First longitudinal direction stiffener (7) and second longitudinal direction stiffener (8), PMA is arranged from inside to outside between PMA opening and inner shell (1)
The 3rd longitudinal stiffener (5) and the 4th longitudinal stiffener (6) is arranged from inside to outside between opening and shell (2)；Inner shell (1) with
It is equally spaced the first horizontal stiffener (11) and the second horizontal stiffener (12), in shell between first longitudinal direction stiffener (7)
(2) it is equally spaced the 3rd horizontal stiffener (13) and the 4th horizontal stiffener (14) and the 3rd longitudinal stiffener (5) between；
PMA opening and in front of it between floor (10) arrange the 5th horizontal stiffener (4)；Cloth between PMA opening and its rear floor (9)
Put the 6th horizontal stiffener (3)；The longitudinal stiffener of arrangement the 5th between front floor (10) and the 5th horizontal stiffener (4)
(16)；The longitudinal stiffener (15) of arrangement the 6th between rear floor (9) and the 6th horizontal stiffener (3)；
Described longitudinally, laterally stiffener end is cut tiltedly using 25 °；
PMA opening corner is the arc transition of 14C/100 by radius R；
4th longitudinal stiffener (6) is more than or equal to 13C/100 with spacing L1 of shell (2)；
Spacing L2 of the 3rd longitudinal stiffener (5) and the 4th longitudinal stiffener (6) is more than or equal to 10C/100；
PMA edge of opening and the 3rd longitudinal stiffener (5) be more than or equal to 5C/100 apart from L3；
The distance away from rear floor (9) for the PMA edge of opening, and PMA edge of opening being more than or equal to apart from L4 away from front floor
600mm.
2. the double topside double bottom ship of the expanded letter based on big opening PMA in ballast tank according to claim 1, its feature exists
It is arranged in described inner shell (1) and described shell (2) in, described 6th longitudinal stiffener (15) and the 5th longitudinal stiffener (16)
Middle part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410825503.2A CN104554618B (en) | 2014-12-25 | 2014-12-25 | Wide-body double hull board side double bottom ship based on large-opening PMA (Permanent Means of Access) in ballast tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410825503.2A CN104554618B (en) | 2014-12-25 | 2014-12-25 | Wide-body double hull board side double bottom ship based on large-opening PMA (Permanent Means of Access) in ballast tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104554618A CN104554618A (en) | 2015-04-29 |
| CN104554618B true CN104554618B (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410825503.2A Active CN104554618B (en) | 2014-12-25 | 2014-12-25 | Wide-body double hull board side double bottom ship based on large-opening PMA (Permanent Means of Access) in ballast tank |
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| CN (1) | CN104554618B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114408089A (en) * | 2022-03-01 | 2022-04-29 | 广船国际有限公司 | Double-side inboard horizontal platform and ship |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2413308B (en) * | 2002-05-31 | 2006-03-15 | Intelligent Engineering | Double hull formed from elastomer laminate plating |
| CN201923287U (en) * | 2010-02-06 | 2011-08-10 | 中远船务工程集团有限公司 | Device for preventing silt deposition in ballast tank of ship and treating silt |
| KR101110836B1 (en) * | 2010-03-24 | 2012-02-24 | 삼성중공업 주식회사 | Structure of ballast tank for elimination sediment from ballast tank |
| CN101954963B (en) * | 2010-05-17 | 2013-01-16 | 南通中远川崎船舶工程有限公司 | Sludge removing structure in large ship ballast water tank |
| CN102030077B (en) * | 2010-11-30 | 2013-04-03 | 南通中远川崎船舶工程有限公司 | Anti-sediment type large-size ship with new ballast tank separation |
| CN103204226B (en) * | 2012-01-17 | 2015-07-15 | 大连船舶重工集团有限公司 | Silt-preventing function-based sediment overflow ballast tank |
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