Longitudinal girder for ship
By setting parallel reinforcement ribs on the longitudinal truss and opening lightening holes, the construction cost and weight reduction problems caused by increasing the thickness of the longitudinal truss in the prior art are solved, and the effect of strengthening the strength without increasing the thickness is achieved.
Patent Information
- Application Number
- CN202422103370.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-08-28
AI Technical Summary
In the prior art, in order to meet the strength requirements of the front end of the bottom of the cargo ship, the thickness of the longitudinal truss is usually increased, resulting in an increase in construction costs and is not conducive to the weight loss of the ship.
A longitudinal truss for ships is adopted, two parallel reinforcement ribs are arranged in the same direction as the main body of the longitudinal truss, and lightening holes are opened between the reinforcement ribs to optimize the position of the reinforcement ribs to meet the strength requirements without increasing the thickness of the longitudinal truss.
By jointly applying stress to the reinforcement ribs and the longitudinal truss main body, the strength of the longitudinal truss main body is enhanced, the thickness of the longitudinal truss is avoided, and the weight is reduced to meet the strength requirements, which solves the problems of construction costs and weight reduction.
Smart Images
Figure CN223253201U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ships, in particular to a longitudinal girder for ships. Background Art
[0002] During the design process of cargo ships, based on the strength requirements of the bow bottom of the ship, the front end of the bottom usually needs additional reinforcement to resist the bottom impact pressure. However, in the actual production process, when the strength is insufficient, the thickness of the longitudinal girders is usually increased to meet the requirements, which brings additional costs to the construction and is not conducive to the weight reduction needs of the ship. Utility Model Content
[0003] The purpose of the present utility model is to solve the technical problem that in the prior art, when the front end of the bottom of a ship is not strong enough, the thickness of the longitudinal girders is usually increased to meet the requirements, which brings additional costs to the construction and is not conducive to the weight reduction needs of the ship.
[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a longitudinal girder for a ship, comprising: a longitudinal girder body, on which two reinforcing ribs are provided, and the two reinforcing ribs are parallel to each other.
[0005] Preferably, the arrangement direction of the two reinforcing ribs is the same as the arrangement direction of the longitudinal girder body.
[0006] Preferably, a lightening hole is provided in the longitudinal girder main body area between the two reinforcing ribs.
[0007] Preferably, the dimension of the lightening hole in a direction perpendicular to the reinforcing rib is smaller than the distance between two reinforcing ribs.
[0008] Preferably, the distance between the two reinforcing ribs is not less than 630 mm.
[0009] Preferably, the distance between the reinforcing ribs on the longitudinal girder body close to the hull outer plating and the connection between the longitudinal girder body and the hull outer plating is not greater than 585 mm.
[0010] Compared with the prior art, the advantages and positive effects of the present invention are:
[0011] 1. The utility model provides a longitudinal girder for ships. By means of two mutually parallel reinforcing ribs arranged in the same direction as the longitudinal girder body, the longitudinal girder body can be subjected to force together with the longitudinal girder body, thereby enhancing the strength of the longitudinal girder body without adjusting the thickness of the longitudinal girder body.
[0012] 2. The utility model provides a longitudinal girder for ships, which meets the bow strength requirements by optimizing the position of the reinforcing ribs on the longitudinal girder without increasing the thickness of the longitudinal girder. This avoids the problem of shipyards often placing orders in advance and increasing the plate thickness after production design in order to speed up the progress. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0014] Figure 1 The utility model provides a schematic diagram of the overall structure of a longitudinal girder for ships.
[0015] Legend:
[0016] 1. Longitudinal girder body; 2. Lightening holes; 3. Reinforcement ribs. DETAILED DESCRIPTION
[0017] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.
[0018] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.
[0019] Example 1:
[0020] See also Figure 1 The present invention provides a longitudinal girder for a ship, comprising: a longitudinal girder body 1, on which two reinforcing ribs 3 are arranged, the two reinforcing ribs 3 being parallel to each other. The arrangement direction of the two reinforcing ribs 3 is the same as that of the longitudinal girder body 1.
[0021] By having two mutually parallel reinforcing ribs 3 arranged in the same direction as the longitudinal girder body 1, the longitudinal girder body 1 can be subjected to force together with the longitudinal girder body 1 to enhance the strength of the longitudinal girder body 1 without adjusting the thickness of the longitudinal girder body 1.
[0022] In this embodiment, a lightening hole 2 is provided in the region of the longitudinal girder body 1 between the two reinforcing ribs 3 . The dimension of the lightening hole 2 in the direction perpendicular to the reinforcing rib 3 is smaller than the distance between the two reinforcing ribs 3 .
[0023] Lightening holes 2 are opened in the longitudinal girder body 1 between the reinforcing ribs 3 and the positions of the lightening holes 2 are defined, thereby reducing the weight of the longitudinal girder body 1 while avoiding a reduction in strength.
[0024] In this embodiment, the distance between the two reinforcing ribs 3 is not less than 630 mm.
[0025] In this embodiment, the distance between the reinforcing rib 3 on the longitudinal girder body 1 close to the hull outer plating and the connection between the longitudinal girder body 1 and the hull outer plating is no more than 585 mm.
[0026] Conventionally, meeting bow strength requirements requires additional longitudinal girder thickness. However, shipyards often place orders and design production in advance to improve schedules. To avoid the complications of increased plate thickness, the strength requirements can be met by optimizing the position of the stiffeners 3 on the longitudinal girder. If insufficient strength is observed during the slap calculation, the requirements can be met by repositioning the original number of stiffeners. The reinforcement area covers the flat bottom area 0.3L aft of the bow perpendicular and the connected plates and frames within a height of 500mm from the baseline. Stiffeners outside the bottom slap reinforcement area should be gradually transitioned to maintain longitudinal continuity. After determining the minimum longitudinal girder thickness, the distance between the stiffeners 3 and the outer bottom plating within the reinforcement area is adjusted. Typically, two longitudinal stiffeners 3 are placed. Because lightening holes 2 are required between the two stiffeners 3, the distance between the stiffeners 3 on the longitudinal girder body 1 near the hull plating and the connection between the longitudinal girder body 1 and the hull plating is adjusted to between 550 and 585mm to pass the slap strength calculation, thus avoiding the need to increase the thickness of the longitudinal girder body 1.
[0027] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.
Claims
1. A longitudinal girder for a ship, characterized in that: include: A longitudinal girder main body (1), wherein two reinforcing ribs (3) are provided on the longitudinal girder main body (1), and the two reinforcing ribs (3) are parallel to each other.
2. The longitudinal girder for a ship according to claim 1, characterized in that: The arrangement direction of the two reinforcing ribs (3) is the same as the arrangement direction of the longitudinal girder body (1).
3. The longitudinal girder for a ship according to claim 1, characterized in that: A lightening hole (2) is provided in the region of the longitudinal girder body (1) between the two reinforcing ribs (3).
4. The longitudinal girder for a ship according to claim 3, characterized in that: The dimension of the lightening hole (2) in a direction perpendicular to the reinforcing ribs (3) is smaller than the distance between two reinforcing ribs (3).
5. The longitudinal girder for a ship according to claim 1, characterized in that: The distance between the two reinforcing ribs (3) is not less than 630 mm.
6. The longitudinal girder for a ship according to claim 5, characterized in that: The distance between the reinforcing rib (3) on the longitudinal girder body (1) close to the hull outer plate and the connection between the longitudinal girder body (1) and the hull outer plate is not greater than 585 mm.