CN112298450A - Structure for reducing fatigue of bulkhead anchor hoop flat steel of LNG ship - Google Patents
Structure for reducing fatigue of bulkhead anchor hoop flat steel of LNG ship Download PDFInfo
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- CN112298450A CN112298450A CN202011004744.2A CN202011004744A CN112298450A CN 112298450 A CN112298450 A CN 112298450A CN 202011004744 A CN202011004744 A CN 202011004744A CN 112298450 A CN112298450 A CN 112298450A
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- 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
- B63B3/56—Bulkheads; Bulkhead reinforcements
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Abstract
The invention discloses a structure for reducing fatigue of a bulkhead anchor hoop flat steel of an LNG ship, wherein a liquid cabin surface of a bulkhead plate is provided with flat steel for anchoring an insulation box, the reverse side of the liquid cabin surface is provided with a reinforcing structure, the liquid cabin surface at least comprises first anchoring flat steel vertically arranged on a board side and second anchoring flat steel horizontally arranged on a cabin top and/or a cabin bottom, and the reinforcing structure comprises: the first anchoring flat steel and the horizontal bulkhead reinforcing rib on the back of the first anchoring flat steel are crossed in projection, and the second anchoring flat steel and the horizontal bulkhead reinforcing rib on the back of the second anchoring flat steel are parallel to each other; and one end of the first toggle plate is connected with the outer plate, and the other end of the first toggle plate is connected with the bulkhead horizontal reinforcing rib. The invention effectively improves the strength of the reinforced structure after the flat iron is anchored on the bulkhead.
Description
Technical Field
The invention belongs to the technical field of ship design and manufacture, and particularly relates to a structure for reducing fatigue of bulkhead anchor hoop flat steel of an LNG ship.
Background
The film type NO.96LNG cargo tank corner of the ship is fixed with an anchor hoop flat iron on the liquid tank surface due to the requirement of clamping an insulating tank, and an inverted-ejection reinforcing structure is arranged in the isolated empty tank area on the reverse side. In 2016 edition of IGC Code published by International maritime organization IMO, higher requirements are provided for fatigue nodes of anchor hoop flat irons, and the prior reinforcing structure of a simple toggle plate cannot meet the increase of the requirements, so that a reverse-vertex reinforcing structure needs to be rearranged to meet the requirements of fatigue.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a structure for reducing the fatigue of a bulkhead anchor hoop flat steel of an LNG ship.
In order to achieve the purpose, the invention adopts the following technical scheme:
a structure for reducing fatigue of a bulkhead anchor hoop flat steel of an LNG ship, flat steel used for anchoring an insulation box is arranged on a liquid cabin surface of a bulkhead plate, a reinforcing structure is arranged on the opposite side of the liquid cabin surface, the liquid cabin surface at least comprises a first anchoring flat steel vertically arranged on a broadside and a second anchoring flat steel horizontally arranged on a cabin top and/or a cabin bottom, and the reinforcing structure comprises: the first anchoring flat steel and the horizontal bulkhead reinforcing rib on the back of the first anchoring flat steel are crossed in projection, and the second anchoring flat steel and the horizontal bulkhead reinforcing rib on the back of the second anchoring flat steel are parallel to each other; and one end of the first toggle plate is connected with the outer plate, and the other end of the first toggle plate is connected with the bulkhead horizontal reinforcing rib.
Preferably, the anchoring flat steel comprises an inner layer and an outer layer, and the reinforcing structure comprises: and the bulkhead upper part reinforcing rib and the second anchoring flat steel positioned at the upper inner layer are symmetrically arranged at two sides of the bulkhead plate.
Preferably, the reinforcing structure comprises: the inclined reinforcing ribs are arranged on the reverse side of the liquid cabin surface of the cabin wall plate in parallel, each inclined reinforcing rib is arranged between two adjacent first toggle plates in the ship width direction, the inclined reinforcing ribs are arranged between the outer plate and the reinforcing ribs on the upper portion of the cabin wall in the ship height direction, and inclined ends of the inclined reinforcing ribs point to the outer plate.
Preferably, a thick inserting plate is arranged on the bulkhead plate at the lower part, and the thick inserting plate extends from the outer plate to the first bulkhead horizontal reinforcing rib at the lower part in the ship height direction.
Preferably, the construction method of the thick inserting plate comprises the following steps: determining a region for inserting a thick plate on the bulkhead plate; cutting off the original bulkhead plate of the determined area; and welding the thick socket plate in the region.
Preferably, the tank deck comprises a third obliquely arranged anchoring flat steel, and the corresponding reinforcing structure comprises: an inner plate disposed parallel to the outer plate; and one end of the second toggle plate is connected with the outer plate, the other end of the second toggle plate is connected with the inner plate, and the main body of the second toggle plate is quadrilateral.
Preferably, the thickness of the bulkhead upper reinforcing rib is greater than the thickness of the second anchoring flat steel.
Compared with the prior art, the invention has the beneficial effects that: the strength of the reinforcing structure after the flat iron is anchored on the bulkhead is effectively improved, and the fatigue of the reinforcing structure is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view at a bulkhead plate.
Fig. 2 is a schematic cross-sectional view at a-a in fig. 1, where the left side of the bulkhead plate is the tank area and the right side of the bulkhead plate is the isolated empty tank area.
Fig. 3 is a schematic cross-sectional view at B-B in fig. 1.
Fig. 4 is a schematic cross-sectional view at C-C in fig. 1.
Fig. 5 is a schematic cross-sectional view at D-D in fig. 1.
The structure comprises an upper cabin wall inclined truss 1, a lower cabin wall inclined truss 2, a cabin wall upper reinforcing rib 3, a cabin wall horizontal reinforcing rib 4, a toggle plate 5, a beveling reinforcing rib 6, a cut-in thick plate 7, a cabin wall plate 8, an anchor hoop flat iron 10, an inner shell deck 11, an upper bevel side plate 12, an inner longitudinal wall plate 13, a lower bevel side plate 14, an inner bottom plate 15 and an inclined truss toggle plate 16.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
As shown in fig. 1-5, this example provides the following embodiments.
A joint reinforcing structure for reducing fatigue of a bulkhead anchor band flat steel of an LNG ship comprises an upper bulkhead oblique truss 1, a lower bulkhead oblique truss 2, a bulkhead horizontal reinforcing rib 4, a bulkhead upper reinforcing rib 3, a beveling reinforcing rib 6, a toggle plate 5 and a bottom inserted thick plate 7. The outer panels are an inner shell deck 11 on the upper side, an inner bottom panel 15 on the lower side, an upper deckle 12 on the upper deckle side and a lower deckle 14 on the lower deckle side.
The inner panel is an upper bulkhead stringer 1 on the upper skew side and a lower bulkhead stringer 2 on the lower skew side. And aiming at the reinforcement change brought by the new specification updating requirement, the fatigue stress of the anchor hoop flat iron is reduced by using different reinforcement modes.
In the bottom transverse bulkhead area, the pressure brought by liquid cargo is larger in the bottom area of the transverse bulkhead, a thick inserting plate 7 needs to be arranged according to the area where the anchor hoop flat iron is arranged, and the thickness of the thick inserting plate 7 is larger than that of the common bulkhead so as to resist the adverse effect caused by the increase of the stress at the position.
The number of the toggle plates 5 is kept consistent according to the number of the longitudinal bones of the inner bottom, and the toggle plates are crossed with the two anchor hoop flat irons 10 on the reverse side.
The parallel position of the lower inclined side plate 14 is provided with a lower cabin wall inclined truss 2, and simultaneously, an inclined truss bracket 16 which is arranged in an inclined way is arranged and is intersected with two anchor hoops 10 flat irons on the reverse side at a certain angle, and the inclined truss bracket 16 is quadrilateral and different from a common bracket in shape, and is connected with the lower inclined side plate 14 and the lower cabin wall inclined truss 2.
In the whole bottom area, the frame structure consisting of the inserted thick plate 7, the bulkhead reinforcing ribs 4, the lower bulkhead inclined trusses 2 and the toggle plates 5 can well relieve the fatigue stress level of the anchor band flat iron in the bottom area.
At the middle side position close to the side of the board of the bulkhead, the fatigue stress is not large, so that special reinforcement can be omitted, the original transverse bulkhead reinforcing rib 4 is used as reinforcement and is crossed with the two anchor hoop flat irons 10 on the reverse side, and the bulkhead reinforcing rib 4 is directly welded on the inner longitudinal wall plate 13.
The upper part of the bulkhead is under pressure of liquid cargo attack and is different from the bottom.
An upper bulkhead stringer 1 is arranged at the position parallel to an upper inclined side plate 12, and meanwhile, an inclined stringer toggle plate 16 which is obliquely arranged is arranged and is intersected with an anchor hoop flat iron 10 at a certain angle, and the inclined stringer toggle plate 16 is connected with the upper inclined side plate 12 and the upper bulkhead inclined stringer 1.
In the upper part of the bulkhead, between the horizontal bulkhead stiffener 4 and the inner shell deck 11, a toggle 5 is arranged, one end of the toggle 5 is aligned with the inner shell deck 11, the other end is connected to the bulkhead stiffener 4, between the stiffeners, on the opposite side of the anchor band flat 10, there is arranged the upper bulkhead stiffener 3 aligned with it, the thickness of the stiffener is greater than that of the anchor band flat 10 for centering, and the leg of the upper bulkhead stiffener 3 is slightly larger than the normal leg to ensure sufficient centering requirements. Since the pressure at the upper part of the bulkhead is under the influence of liquid cargo attack, a beveled reinforcing rib 6 is arranged between the reinforcing rib 3 at the upper part of the bulkhead and the deck 11 of the inner shell between the toggle plates 5 and intersects with the anchor hoop flat iron 10 at the reverse side in a crossed manner to relieve the fatigue stress of the other anchor hoop flat iron 10. The oblique reinforcing ribs 6 avoid hard spots caused by reinforcing the outer layer anchoring flat steel by arranging toggle plates.
Although the present invention has been described in detail with respect to the above embodiments, it will be understood by those skilled in the art that modifications or improvements based on the disclosure of the present invention may be made without departing from the spirit and scope of the invention, and these modifications and improvements are within the spirit and scope of the invention.
Claims (7)
1. A structure for reducing fatigue of a bulkhead anchor hoop flat steel of an LNG ship, flat steel used for anchoring an insulation box is arranged on a liquid cabin surface of a bulkhead plate, a reinforcing structure is arranged on the reverse side of the liquid cabin surface, and the liquid cabin surface at least comprises a first anchoring flat steel vertically arranged on a board side and a second anchoring flat steel horizontally arranged on a cabin top and/or a cabin bottom, and is characterized in that the reinforcing structure comprises:
the first anchoring flat steel and the horizontal bulkhead reinforcing rib on the back of the first anchoring flat steel are crossed in projection, and the second anchoring flat steel and the horizontal bulkhead reinforcing rib on the back of the second anchoring flat steel are parallel to each other;
and one end of the first toggle plate is connected with the outer plate, and the other end of the first toggle plate is connected with the bulkhead horizontal reinforcing rib.
2. The LNG ship bulkhead anchor band flat steel fatigue reducing structure of claim 1, characterized in that the anchor flat steel comprises two layers, one inside and the other, the reinforcing structure comprising:
and the bulkhead upper part reinforcing rib and the second anchoring flat steel positioned at the upper inner layer are symmetrically arranged at two sides of the bulkhead plate.
3. The LNG ship bulkhead strap fatigue reducing structure of claim 2, characterized in that the reinforcing structure comprises:
the inclined reinforcing ribs are arranged on the reverse side of the liquid cabin surface of the cabin wall plate in parallel, each inclined reinforcing rib is arranged between two adjacent first toggle plates in the ship width direction, the inclined reinforcing ribs are arranged between the outer plate and the reinforcing ribs on the upper portion of the cabin wall in the ship height direction, and inclined ends of the inclined reinforcing ribs point to the outer plate.
4. The structure for reducing fatigue of a bulkhead anchor band flat steel of an LNG ship as claimed in claim 1, wherein a shear-inserting plate is provided on the bulkhead plate at the lower part, and the shear-inserting plate extends from the outer plate to the first bulkhead horizontal reinforcing rib at the lower part in the ship height direction.
5. The LNG ship bulkhead strap fatigue reducing structure of claim 4, wherein the construction method of the plank insert comprises:
determining a region for inserting a thick plate on the bulkhead plate;
cutting off the original bulkhead plate of the determined area;
and welding the thick socket plate in the region.
6. The LNG ship bulkhead tie-down fatigue reducing structure of claim 1, wherein the tank deck comprises a third diagonally disposed anchoring band, and the corresponding reinforcing structure comprises:
an inner plate disposed parallel to the outer plate;
and one end of the second toggle plate is connected with the outer plate, the other end of the second toggle plate is connected with the inner plate, and the main body of the second toggle plate is quadrilateral.
7. The LNG ship fatigue reducing structure of bulkhead anchor band flats of claim 2, characterized in that the thickness of the bulkhead upper reinforcement bars is greater than the thickness of the second anchor flat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011004744.2A CN112298450B (en) | 2020-09-22 | 2020-09-22 | Structure for reducing fatigue of bulkhead anchoring flat steel of LNG ship |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011004744.2A CN112298450B (en) | 2020-09-22 | 2020-09-22 | Structure for reducing fatigue of bulkhead anchoring flat steel of LNG ship |
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| CN112298450A true CN112298450A (en) | 2021-02-02 |
| CN112298450B CN112298450B (en) | 2022-12-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113682453A (en) * | 2021-09-07 | 2021-11-23 | 中国舰船研究设计中心 | Titanium alloy elastic beam type ballast water tank between ship sides and diving system |
| CN113682420A (en) * | 2021-09-17 | 2021-11-23 | 上海外高桥造船有限公司 | Ship oil tank structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113682453A (en) * | 2021-09-07 | 2021-11-23 | 中国舰船研究设计中心 | Titanium alloy elastic beam type ballast water tank between ship sides and diving system |
| CN113682420A (en) * | 2021-09-17 | 2021-11-23 | 上海外高桥造船有限公司 | Ship oil tank structure |
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| Publication number | Publication date |
|---|---|
| CN112298450B (en) | 2022-12-13 |
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