CN106314678A - Structure for preventing brittle fracture of main hull - Google Patents
Structure for preventing brittle fracture of main hull Download PDFInfo
- Publication number
- CN106314678A CN106314678A CN201610738257.6A CN201610738257A CN106314678A CN 106314678 A CN106314678 A CN 106314678A CN 201610738257 A CN201610738257 A CN 201610738257A CN 106314678 A CN106314678 A CN 106314678A
- Authority
- CN
- China
- Prior art keywords
- longitudinally continuous
- coaming
- formula
- upper deck
- container ship
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- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B3/00—Hulls characterised by their structure or component parts
- B63B3/14—Hull parts
- B63B3/48—Decks
- B63B3/54—Hatch openings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B3/00—Hulls characterised by their structure or component parts
- B63B3/14—Hull parts
- B63B3/48—Decks
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a structure for preventing a brittle fracture of a main hull. A main body of the structure is a container ship; a longitudinal continuous hatch coaming and a longitudinal continuous hatch top plate are arranged on an upper deck of a broadside dual-shell of the container ship; the longitudinal continuous hatch coaming and the upper deck are positioned at the middle part of a hull of the container ship; the longitudinal continuous hatch top plate is connected in a welding mode to the top end of the longitudinal continuous hatch coaming; the longitudinal continuous hatch coaming and the upper deck adopt extremely thick steel sheets with the crack arrest characteristic; by verification of a double tension test or an ESSO test the crack arrest characteristic of the extremely thick steel sheets meets the requirements of the following formula: a crack arrest temperature CAT is lower than or equal to minus 10 DEG C, or at a temperature of minus 10 DEG C, a crack arrest toughness Kca is greater than or equal to 6,000N/mm<3>/2. By triple guarantee, the risk of the brittle fracture of the main hull structure of the container ship can be reduced to a very low degree, which is helpful for obviously improving security of the large-scale container ship.
Description
Technical field
The present invention relates to container ship manufacturing technology field, a kind of structure preventing main hull brittle fracture.
Background technology
Container ship can be divided into all containership and semi-container ship two kinds, and its structure and shape have bright with conventional freighter
Aobvious difference.Container ship handling speed is high, and port time is short, mostly uses the high speed of a ship or plane, is usually 20 23 nautical miles the most per hour.Closely
In order to energy-conservation over Nian, typically use economical speed, about 18 nautical miles per hour.At the container ship that coastal short distance is navigated by water, the speed of a ship or plane
The most only about 10 nautical miles.In recent years, the U.S., Britain, the groceries of state's import and export such as Japan there are about 70%--90% and use packaging
Case transports.
Along with the maximization of container ship, longitudinal hatch coaming and the torsion box position of Ship Structure use high intensity pole in a large number
Steel plate (yield strength reaches 390 MPas or 460 MPas, and thickness is at more than 50mm).Thing followed brittle fracture toughness and
The safety-related problem such as crack arrest characteristic highlights day by day.The risk that the increase of steel plate thickness can cause brittle crack to produce is the most corresponding
Increase.Once crackle occur in the slab weld seam of pole, this crackle will constantly be propagated along weld seam and make crackle turn to mother metal.
Slab risk in use in pole is mainly welded brittle break, and this destruction is generally by two stage groups
Become, i.e. first produce fatigue crack, then with phase at Ship Structure defect (such as hydrogen induced cracking, the defect such as lack of penetration of weld seam) place
When fast speed expanded, some or all of run through this structure so that structure or component destroy rapidly, i.e. brittle break.
For preventing it from brittle break occurring, there are two design criterias accordingly: one is to prevent crackle from producing criterion (i.e. controlling its cracking)；
Two is crack arrest characteristic criterion (i.e. controlling the extension of crackle).The former requires that the weak part (such as position while welding) of structure to have necessarily
Opposing cracking ability, and the latter require once have crackle to produce, material should have enough abilities to be stoped.
The value of goods of container ship self and institute's carrying is much more expensive, such as 2013 MOLs " comfortable number "
The fracture sinking of (MOL Comfort) container ship, amount for which loss settled reaches 400,000,000 dollars according to estimates.Therefore, to being easily caused calamity
The main hull brittle fracture of difficulty consequence, it is necessary to take into account multiple preventive measure.
Summary of the invention
It is an object of the invention to provide a kind of on the basis of using the steel plate with crack arrest characteristic, use through checking
Welding method, and carry out 100% ultrasonic flaw detection, design the container ship hull structure of abutment joint dislocation, to solve
The problem proposed in above-mentioned background technology.
For achieving the above object, the present invention provides following technical scheme: a kind of structure preventing main hull brittle fracture, main
Body is container ship, the upper deck of container ship side bivalve is provided with and is longitudinally continuous formula coaming and is longitudinally continuous formula cabin
Mouth top board, is longitudinally continuous formula coaming and upper deck is positioned in the middle part of container ship hull, is longitudinally continuous the welding of formula hatch top board
It is connected to be longitudinally continuous formula coaming top, is longitudinally continuous formula coaming and upper deck uses and has the extremely thick of crack arrest characteristic
Steel plate, the crack arrest characteristic of pole steel plate, through double tension test or ESSO verification experimental verification, meets following formula requirement:
Crack arrest temperature (CAT) CAT≤-10 DEG C, or arrest toughness Kca >=6,000N/mm when-10 DEG C3/2
Preferably, the abutment joint dislocation of formula coaming and upper deck it is longitudinally continuous more than 300mm.
Preferably, the abutment joint welding procedure being longitudinally continuous formula coaming and upper deck is verified through deep notched test,
The maximum tension stress σ N/mm that fatigue notch toughness value Kc and main hull can bear when-10 DEG C2And it is full between thickness of slab tmm
Foot formula: N/mm3/2。
Preferably, fatigue notch toughness value Kc is not less than 3,000N/mm when-10 DEG C3/2。
Preferably, it is longitudinally continuous all butt welds in the construction phase of formula coaming and upper deck and uses lossless spy
Wound, it is ensured that the defect length in weld seam is less than 20mm.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention, can be by the risk reduction of container ship main hull structure brittle fracture to the least journey by triple guarantees
Degree, contributes to significantly improving the safety of super-container vessel.The design of this structure makes super-container vessel at Life Cycle
In butt weld, brittle crack is not produced, even if owing to the unforeseen reason of prior art causes brittle crack, also in phase
Brittle crack can be made to stop before hull generation large-scale damage.
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram；
Fig. 2 is the schematic diagram of weld seam deep bar test specimen shape.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Referring to Fig. 1, the present invention provides a kind of technical scheme: a kind of structure preventing main hull brittle fracture, main body is
Container ship 1, the upper deck 2 of container ship 1 topside bivalve is provided with and is longitudinally continuous formula coaming 3 and is longitudinally continuous formula cabin
Mouth top board 4, is longitudinally continuous formula coaming 3 and upper deck 2 is positioned at container ship 1 midship, be longitudinally continuous formula hatch 4 top board
It is welded to connect in being longitudinally continuous formula coaming 3 top, is longitudinally continuous formula coaming 3 and upper deck 2 uses and has crack arrest spy
The pole steel plate of property, the crack arrest characteristic of pole steel plate is through double tension test or ESSO verification experimental verification.
The formula that the is longitudinally continuous coaming 3 of container ship 1 and upper deck 2 use the pole steel plate with crack arrest characteristic, steel
The crack arrest characteristic of plate, through double tension test or ESSO verification experimental verification, meets following formula requirement: crack arrest temperature (CAT) CAT≤-10 DEG C, or
Arrest toughness Kca >=6,000N/mm when-10 DEG C3/2。
More than the 300mm as in figure 2 it is shown, the abutment joint 5 being longitudinally continuous formula coaming 3 and upper deck 2 misplaces.
By two kinds of measures, the brittle crack produced in being longitudinally continuous the abutment joint 5 of formula coaming 3 is passing to main hull
During broadcasting, stoped by the upper deck 2 with crack arrest characteristic of lower section.
Brittle crack in the abutment joint 5 of upper deck 2 is once occurred, in the mistake propagated to container ship 1 main hull
Journey cannot be stoped by the Ship Structure of lower section.Therefore, checking welding procedure, it is ensured that the fatigue notch toughness of weld seam, prevention
Brittle crack produces necessary.
Abutment joint 5 welding procedure being longitudinally continuous formula coaming 3 and upper deck 2 is verified through deep notched test, it is desirable to
Fatigue notch toughness value Kc >=3,000N/mm when-10 DEG C3/2.This fatigue notch toughness reguirements value is by the design of container ship 1
Minimum service temperature and allow the maximum tension stress born, and run through the greatest drawback size of thickness of slab, according to formula Try to achieve.Sample break is opened in center or the heat affected area of abutment joint 5.Meeting should
The weld seam of fatigue notch toughness value, it can be ensured that be longitudinally continuous formula coaming 3 and upper deck 2 can not keep away in abutment joint 5
The defect exempted from, in the case of developing into macroscopic fatigue crack, will not occur brittle fracture under the effect of alternate load.
The abutment joint 5 being longitudinally continuous formula coaming 3 and upper deck 2 uses nondestructive flaw detection examination, it is ensured that lacking in weld seam
Sunken size, in allowed band, under the effect of alternate load, will not be grown to macroscopic within the projected life of boats and ships
Fatigue crack.
By above at defect growth, triple guarantees that the three phases such as crackle, cracks can spread is taked occur, can will collect
The risk of vanning ship 1 main hull structure brittle fracture, is reduced to the least degree, contributes to significantly improving oversized container
The safety of ship.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, permissible
Understand and these embodiments can be carried out multiple change without departing from the principles and spirit of the present invention, revise, replace
And modification, the scope of the present invention be defined by the appended.
Claims (5)
1. preventing a structure for main hull brittle fracture, main body is container ship, the upper first of described container ship side bivalve
It is provided with on plate and is longitudinally continuous formula coaming and is longitudinally continuous formula hatch top board, it is characterised in that described in:, be longitudinally continuous formula cabin
Mouthful coaming plate and upper deck are positioned in the middle part of container ship hull, described in be longitudinally continuous formula hatch top board and be welded to connect in being longitudinally continuous formula
Coaming top, described in be longitudinally continuous formula coaming and upper deck and use the pole steel plate with crack arrest characteristic, described pole
The crack arrest characteristic of steel plate, through double tension test or ESSO verification experimental verification, meets following formula requirement: crack arrest temperature (CAT) CAT≤-10
DEG C, or arrest toughness Kca >=6,000N/mm when-10 DEG C3/2。
A kind of structure preventing main hull brittle fracture the most according to claim 1, it is characterised in that be longitudinally continuous described in:
The abutment joint dislocation of formula coaming and upper deck is more than 300mm.
A kind of structure preventing main hull brittle fracture the most according to claim 1, it is characterised in that be longitudinally continuous described in:
The abutment joint welding procedure of formula coaming and upper deck is verified through deep notched test, the fatigue notch toughness value when-10 DEG C
The maximum tension stress σ N/mm that Kc and main hull can bear2And between thickness of slab tmm, meet following formula:N/
mm3/2。
A kind of structure preventing main hull brittle fracture the most according to claim 3, it is characterised in that: described fatigue notch
Toughness value Kc is not less than 3,000N/mm when-10 DEG C3/2。
A kind of structure preventing main hull brittle fracture the most according to claim 1, it is characterised in that be longitudinally continuous described in:
Formula coaming and the upper deck all butt welds in the construction phase use nondestructive inspection, it is ensured that the defect length in weld seam is not
More than 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610738257.6A CN106314678B (en) | 2016-08-29 | 2016-08-29 | A kind of structure preventing main hull brittle fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610738257.6A CN106314678B (en) | 2016-08-29 | 2016-08-29 | A kind of structure preventing main hull brittle fracture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106314678A true CN106314678A (en) | 2017-01-11 |
| CN106314678B CN106314678B (en) | 2018-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610738257.6A Active CN106314678B (en) | 2016-08-29 | 2016-08-29 | A kind of structure preventing main hull brittle fracture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107128438A (en) * | 2017-05-09 | 2017-09-05 | 中国船舶工业集团公司第七0八研究所 | A kind of longitudinal framed plate structure applied to Large Container Ship |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1282300A (en) * | 1997-12-16 | 2001-01-31 | 萱场·马库故莱高株式会社 | Cover or deck structure for marine vessel |
| KR20130123909A (en) * | 2012-05-04 | 2013-11-13 | 현대중공업 주식회사 | Container ship |
| CN203889003U (en) * | 2014-05-28 | 2014-10-22 | 福建鸿业船艇有限公司 | Hatch coaming structure for fiberglass fishing boat |
| CN205396422U (en) * | 2016-03-04 | 2016-07-27 | 江苏扬子鑫福造船有限公司 | High strength hatch encloses |
-
2016
- 2016-08-29 CN CN201610738257.6A patent/CN106314678B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1282300A (en) * | 1997-12-16 | 2001-01-31 | 萱场·马库故莱高株式会社 | Cover or deck structure for marine vessel |
| KR20130123909A (en) * | 2012-05-04 | 2013-11-13 | 현대중공업 주식회사 | Container ship |
| CN203889003U (en) * | 2014-05-28 | 2014-10-22 | 福建鸿业船艇有限公司 | Hatch coaming structure for fiberglass fishing boat |
| CN205396422U (en) * | 2016-03-04 | 2016-07-27 | 江苏扬子鑫福造船有限公司 | High strength hatch encloses |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107128438A (en) * | 2017-05-09 | 2017-09-05 | 中国船舶工业集团公司第七0八研究所 | A kind of longitudinal framed plate structure applied to Large Container Ship |
| CN107128438B (en) * | 2017-05-09 | 2018-12-21 | 中国船舶工业集团公司第七0八研究所 | A kind of longitudinal framed plate structure applied to Large Container Ship |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106314678B (en) | 2018-08-03 |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No. 901 Changjiang Road, Nantong, Jiangsu, Jiangsu Applicant after: Nantong Kawasaki COSCO Marine Engineering Company Limited Address before: No. 117 Linjiang Road, Nantong, Jiangsu Province Applicant before: Nantong COSCO KHI Ship Engineering Co.,Ltd. |
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