CN114423535A - Section bar (flat ball shape) for shipbuilding industry and all structure buildings - Google Patents
Section bar (flat ball shape) for shipbuilding industry and all structure buildings Download PDFInfo
- Publication number
- CN114423535A CN114423535A CN201980100524.9A CN201980100524A CN114423535A CN 114423535 A CN114423535 A CN 114423535A CN 201980100524 A CN201980100524 A CN 201980100524A CN 114423535 A CN114423535 A CN 114423535A
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- CN
- China
- Prior art keywords
- profile
- section bar
- profiles
- cross
- shipbuilding industry
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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
- B63B3/26—Frames
- B63B3/28—Frames of transverse type; Stringers
-
- 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
- B63B3/26—Frames
- B63B3/32—Web frames; Web beams
-
- 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
- B63B3/26—Frames
- B63B3/34—Frames of longitudinal type; Bulkhead connections
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Rod-Shaped Construction Members (AREA)
- Metal Rolling (AREA)
Abstract
The invention relates to profiles which are used mainly in the shipbuilding industry, in the aircraft industry and in all structural constructions. Bilaterally symmetrical spherical profiles have been developed based on the inspiration of the cross-sectional area and/or cross-sectional weight of existing profiles and bone formation in living organisms. The size range of the section bar is as follows: 80-450mm for b, 18-35mm for c, 3-20mm for t, 4-20mm for r1＝1‑10mm,r2＝1‑10mm,r31-5mm and 20-80 mm.
Description
Technical Field
The present invention relates to profiles used in the shipbuilding industry and in all structural constructions.
Background
Ships and aircraft are subjected to various internal and external loads during travel. These loads, which may be static and/or dynamic, directly affect the stresses and deformations of the hull structure. In practice, these vessels are designed to have the strength to withstand these loads to maintain their structural integrity. Currently, these hulls are made of sheet metal and different profiles. One of the most widely used profiles in the shipbuilding industry is the bulb profile (bulb flat reinforcing plate). Such profiles are used in the shipbuilding industry as a substitute for brackets, flat steels and other profiles. Similar profiles, which are commonly used in shipbuilding, have been reinforced by a bead at the edge, whose cross section resembles the letter "P". The weight of the marine profile is about 8-10% of the total weight. These profiles directly affect the construction, structural strength, service life and production costs of the ship.
Object of the Invention
The object of the invention is to reduce the stresses and deformations of the hull and of the aircraft shell or other structures with the developed profile.
Another object of the invention is: extending the life of ships and aircraft or other structures.
It is another object of the present invention; enabling the construction of stronger and lighter vessels and aircraft.
Another object of the invention is: the construction of ships and aircrafts is realized with lower production cost.
The profiles developed to achieve the above object are inspired by the cross-sectional area and/or cross-sectional weight of existing profiles and bone formation in the organism. The size range of the section bar is as follows: 80-450mm for b, 18-35mm for c, 3-20mm for t, 4-20mm for r1＝1-10mm,r2＝1-10mm,r31-5mm and 20-80 mm.
Drawings
Fig. 1 is a cross-sectional view of a profile (1).
Fig. 2 is a detailed view of the profile (1).
Fig. 3 is a detailed view of the profile (1).
Fig. 4 is a detailed view of the profile (1).
Fig. 5 is a perspective view of the profile (1).
The reference numerals and names of the main components shown in the drawings denote as follows:
(1) and (3) a section bar.
The symbols in the drawings are given by name and explanation as follows:
b height of section bar
c half width
t is thickness
r is radius
r1Radius of
r2Radius of
r3Radius of
x distance from the central axis
L is the length.
Detailed Description
The invention relates to a section bar (flat bulb) which is mainly used in shipbuilding industry, aviation industry and all structural buildings.
The profile is developed according to the bone structure of the living being and the cross-sectional area and/or the cross-sectional weight of the existing profile. The moment of inertia of the developed profile is increased.
The invention has a symmetrical shape with spherical structures on both sides, unlike some asymmetrical profiles.
The long bones of humans are usually composed of bone (end) and shaft. The portion of the long bone that expands at both ends is called the bone end (head). Due to the structure of these bones, humans have a powerful skeletal system.
The preliminary theoretical and numerical calculation results show that the moment of inertia of the section is 3% -7% higher than that of other sections. Therefore, the profile of the present invention has less deformation and tension. Furthermore, the profile (1) of the invention provides a more durable hull structure using the same weight of material. Also, since the new profile structure can reduce stress and deformation generated in the hull, a longer ship shape can be constructed with a longer life span.
The measurement ranges of the profile (1) are shown in table 1. The value "x" in the two-dimensional diagram in fig. 1 represents the distance of the center of the elliptical geometry of the top of the profile from the center of the area to the y-axis. The angle α shown in fig. 1 is 30 ° which is a fixed value for all dimensions of the profile.
TABLE 1 range of profile sizes
The dimensions of the profile (1) may take values different from the determined limits shown in table 1. The dimensions obtained in the preliminary study were as follows: 140mm for b, 19mm for c, 8.24mm for t, 5.50mm for r1＝5mm,r2＝5mm,r32.5mm and x 60 mm.
The profile (1) is developed from the cross-sectional area and/or the cross-sectional weight of existing profiles and the bone structure of living beings. Finally, it aims to increase the moment of inertia of the profile. Basically, the aim is to increase the moment of inertia about the neutral axis of the profile, thereby reducing the stresses in the profile.
The bending stress in the profile is calculated as follows:
wherein σbIs the bending stress, in Pa; m is the bending moment in the profile; y is the perpendicular distance from the neutral axis; i is the moment of inertia about the neutral axis, order m4. Since the moment of inertia is fourth order, increasing this parameter significantly reduces the bending stress. In the case of the development of the profile (1), the moment of inertia about the neutral axis increases.
For the analysis of the strength, deformation and the like of the profile (1), different loads and boundary conditions are used within the range of preliminary theoretical and numerical calculation. The three-dimensional solid model is subjected to numerical analysis by adopting a finite element method.
The section bar (1) is subjected to built-in load and two-dimensional load tests by using a finite element method. The tests and data obtained are as follows.
a) One-dimensional load test under fixed constraint boundary conditions
The stress and deformation behavior of the profile (1) is numerically calculated by using a finite element method. The data used in the fixed load calculation is shown in table 2.
| Model (model) | Section bar-1 of the invention |
| Primitive type | Hybrid high-order 20-node and 10-node network elements |
| Number of elements | 6068 |
| Number of nodes | 38795 |
| Aspect ratio | 1.34–7.04 |
| Orthogonality | 0.35–1.00 |
| Loading | Constantly distributed MPa |
| Boundary condition | Single sided attachment |
TABLE 2 fixed load test data
b) Two-dimensional load test under fixed constraint boundary conditions
The stress and deformation behavior of the profile (1) is numerically calculated by using a finite element method. The data used in the fixed load calculation is shown in table 3.
| Model (model) | Section bar-1 of the invention |
| Primitive type | Hybrid high-order 20-node and 10-node network elements |
| Number of elements | 40789 |
| Number of nodes | 105566 |
| Aspect ratio | 1.20–8.53 |
| Orthogonality | 0.27–1.00 |
| Loading | Constantly distributed 1MPa |
| Boundary condition | All surfaces are fixed |
TABLE 3 two-dimensional load test data
The moment of inertia about the x-axis of the profile (1) is increased by about 3% and the moment of inertia about the y-axis by 70%. According to the results of the numerical calculations, the tension of the panel built with the profile (1) of the invention is reduced by 9% compared to the panel built with the existing profile. In addition, compared with the prior profile in a single-sided fixed state, the deformation of the profile (1) is reduced by 11 percent.
Claims (2)
1. Profile (bulb) for shipbuilding and all-structural construction, characterized in that:
a bilaterally symmetrical spherical profile, which is developed on the basis of the inspiration of the cross-sectional area and/or the cross-sectional weight of the existing profile and the bone formation in the organism,
-the dimensions of the profile are in the range: 80-450mm for b, 18-35mm for c, 3-20mm for t, 4-20mm for r1＝1-10mm,r2＝1-10mm,r31-5mm and 20-80 mm.
2. Profile (bulb-shaped) according to claim 1, characterized in that: in another application of the invention, the dimensions of the profile are: 140mm for b, 19mm for c, 8.24mm for t, 5.50mm for r1＝5mm,r2＝5mm,r32.5mm and x 60 mm.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TRTR2019/14784 | 2019-09-27 | ||
| TR201914784 | 2019-09-27 | ||
| PCT/TR2019/050908 WO2021061059A1 (en) | 2019-09-27 | 2019-10-28 | A profile (bulb flat) developed for the shipbuilding industry and all structural constructions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114423535A true CN114423535A (en) | 2022-04-29 |
Family
ID=75167047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980100524.9A Pending CN114423535A (en) | 2019-09-27 | 2019-10-28 | Section bar (flat ball shape) for shipbuilding industry and all structure buildings |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4034315A1 (en) |
| JP (1) | JP2023508813A (en) |
| KR (1) | KR20220066960A (en) |
| CN (1) | CN114423535A (en) |
| WO (1) | WO2021061059A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113198835B (en) * | 2021-04-28 | 2022-07-29 | 北京科技大学 | AH 36-grade hot-rolled flat-bulb steel preparation method based on Adam-SVM model |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104676236B (en) * | 2013-11-27 | 2017-08-15 | 江南造船(集团)有限责任公司 | The welding method of double bulb flat-bulb steel components |
| CN109557178B (en) * | 2017-09-27 | 2021-04-02 | 鞍钢股份有限公司 | Automatic ultrasonic flaw detection device and method for flat-bulb steel |
| CN108787742A (en) * | 2018-07-06 | 2018-11-13 | 鞍钢股份有限公司 | A kind of middle-size and small-size milling method for making Flat-bulb Steel for Ship Use |
| CN109261714B (en) * | 2018-09-05 | 2020-04-24 | 鞍钢股份有限公司 | Rolling method of symmetrical flat-bulb steel for large shipbuilding |
-
2019
- 2019-10-28 WO PCT/TR2019/050908 patent/WO2021061059A1/en active Application Filing
- 2019-10-28 JP JP2022519507A patent/JP2023508813A/en active Pending
- 2019-10-28 EP EP19946298.7A patent/EP4034315A1/en not_active Withdrawn
- 2019-10-28 KR KR1020227013797A patent/KR20220066960A/en unknown
- 2019-10-28 CN CN201980100524.9A patent/CN114423535A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| KR20220066960A (en) | 2022-05-24 |
| EP4034315A1 (en) | 2022-08-03 |
| WO2021061059A1 (en) | 2021-04-01 |
| JP2023508813A (en) | 2023-03-06 |
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