KR20080032542A - An impact-absorbing support structure for ship-collision protectors of offshore floating structures - Google Patents

Abstract

An impact-absorbing support structure for a ship-collision protector for an offshore floating structure is provided to absorb shock force caused from the ship collision and to maximize the collision protection effect of the protector by installing an upper plate, square side plates, inner reinforcements, and horizontal/vertical reinforcements. An impact-absorbing support structure for a ship-collision protector(3) for an offshore floating structure comprises a partition part(20), and a support structure(4). The partition part is installed at the structure. The support structure, installed at the outer plate of the partition part, fixes the protector. The support structure includes an upper plate(40), square side plates(41), and inner reinforcements. The upper plate is bonded with the rear end of the protector. One side of the square side plates is contacted with the partition part. The inner reinforcements are combined in the side plates. The inner reinforcements include + shaped reinforcements and center partitions. The side plates include a side plate opening(411). The partition parts include horizontal reinforcements and vertical reinforcements(202).

Description

{An Impact-absorbing Support Structure for Ship-collision Protectors of Offshore Floating Structures}

1 is an exemplary view according to a preferred embodiment of the present invention,

2 is an internal detail view of the supporting structure according to the present invention;

3 is an internal detail view of a partition wall according to the present invention;

4 is an exemplary layout of the ship collision protector installed in the offshore structure,

5 is an exemplary view of a protector installed with a preferred embodiment of the present invention,

6 is an exemplary view of a conventional protector support structure,

7 is a front view of the support structure according to the present invention;

8 is a rear view illustrating a support structure according to the present invention;

9 is a plan sectional view of a supporting structure according to the present invention;

10 is a side cross-sectional view according to a preferred embodiment of the present invention;

11 is a detailed view according to a preferred embodiment of the present invention;

12 is an example of plastic deformation of a protector structure to which a conventional support structure is applied;

13 is a plastic deformation example of a protector structure to which a preferred embodiment of the present invention is applied;

14 is an example of plastic deformation of an existing support structure,

15 is a plastic deformation example of a preferred embodiment of the present invention,

16 is an example of plastic deformation inside and outside the marine structure to which the existing support structure is applied,

17 is an example of plastic deformation inside and outside the marine structure to which the preferred embodiment of the invention is applied.

<Description of the symbols for the main parts of the drawings>

1: Collider 2: Offshore Structure

20: partition wall 200: transverse bulkhead

201: lateral reinforcement 202: longitudinal stiffener

3: protector 4: support structure

4a: conventional protector support structure 40: top plate

41: side plate 410: side plate bracket

411 side plate opening 42 internal reinforcement

420 cross reinforcement 421 middle bulkhead

5: external attachment

The present invention relates to a shock absorbing support structure of a ship collision protector installed on the outside of a floating marine structure, such as Floating Production Storage and Offloading (FPSO), and more particularly, in the event of a collision with a ship or other objects. In addition to the protection of various additional devices mounted on the outside of the structure, minimizing the impact force transmitted to the ship's hull itself prevents permanent deformation of the ship's hull and facilitates the installation of protectors. It is about.

As illustrated in FIGS. 4 and 5, various external additional devices 5 are installed outside the hull of the floating marine structure 2 such as FPSO for production, unloading and mooring of offshore structures such as crude oil and natural gas. There are a plurality of storage tanks for storing them in the hull. In order to protect these additional devices mounted on the outside of the hull from collision with other ships or other impactors 1, a collision protection protector 3 surrounding the additional devices is installed on the hull shell.

In general, the protector 3 is disposed in a suitable shape to absorb impact force such as a lattice using a circular pipe member, and there is a support structure 4 for supporting the protector 3 and connecting with the hull shell. It is installed directly outside of the hull. This protector (3) should be able to prevent the permanent deformation of the hull itself by minimizing the impact force transmitted to the offshore structure (2) in order to prevent oil leakage due to damage to the hull outside as well as to protect the external attachment device (5). do.

6 shows an example of the existing protector support structure, which has the same pipe-like support structure 4a as the protector 3. When the support structure 4a is connected to the protector 3 by welding or the like, it is difficult to install because the member alignment between the pipes must be aligned. The support structure 4a supports the protector 3 and is connected to the offshore structure 2. In addition to the ability to act, the structure is vulnerable to the function of absorbing impact force. Therefore, only the shock absorbing function of the protector 3 itself protects the external structure 5 of the marine structure 2, and the residual impact force that the protector 3 has not absorbed is transmitted directly to the hull of the marine structure 2 to be hulled. May cause damage. In addition, the environment in which the offshore structure 2 is installed and the design criteria for making it become more severe and strict, and as the size and speed of the impact body 1 increase, the magnitude of the impact force that the protector 3 must absorb also increases. In addition, by minimizing the impact force transmitted to the marine structure itself, as well as the protection of the hull external additional devices (5), the marine structure is required to be in the elastic range of the material without permanent deformation. Therefore, the application of the traditional protector structure is difficult to meet the design criteria, there is a problem that the adoption of a new concept of support structure is inevitable.

The present invention was created in order to solve the conventional problems as described above, the purpose of which is to protect the protector as well as the protector support structure connected to the marine structure to absorb the impact force to maximize the impact protection effect of the protector, and deliver to the marine structure By minimizing the impact force to prevent permanent deformation of the structure of the offshore structure, while providing a shock absorbing support structure of the protector for ship collision protection for floating offshore structures that can reduce the manufacturing labor and cost by facilitating the installation of the protector Is in.

The present invention to achieve the object as described above and to solve the conventional drawbacks in the installation of a protector to protect the offshore structure and external attachments attached to the side of the offshore structure, the appearance of the offshore structure A partition wall portion provided therein; A support structure installed on the partition wall and fixed to the protector; The support structure is provided at each end of the protector, the upper plate is joined to the protector end and the center, the one side line is in contact with the partition plate outer plate and the other side line abuts the corner of the upper plate spaced apart from the partition plate outer plate a predetermined distance. It is characterized in that the side plates of the enclosed by four sides, the inner reinforcing material is coupled to the inner surface of the side plates facing each other with the top plate.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is an exemplary view according to a preferred embodiment of the present invention, Figure 2 is a detailed internal view of the support structure according to the present invention, Figure 3 is a detailed internal view of the partition wall according to the present invention. 5 is an exemplary view of a protector in which a preferred embodiment of the present invention is installed, and FIGS. 7 to 9 are exemplary views of a supporting structure according to the present invention, and FIGS. 10 and 11 are illustrations of the preferred embodiment of the present invention. It is also.

1 to 3, the present invention provides a partition structure 20 provided inside the outer structure of the offshore structure 2 and a support structure provided on the partition wall 20 outer plate to support and protect the protector 3. It consists of (4).

7 to 9, the support structure 4 is provided with an end of the protector 3 at an upper center thereof, and an upper plate 40 wider than the diameter of the protector 3, preferably a rectangular upper plate 40. ), And one side line is installed on one side of the upper plate 40 and the other side line is installed on the outer wall of the partition part 20, and four are connected to both sides of the upper plate 40 to surround the upper plate 40 and surround the outer wall part 20. It consists of a square side plate 41 extending toward) and the inner reinforcing material 42 for reinforcing and supporting the inner surface of the upper plate 40 and the lower side plate 41.

The inner reinforcing member 42 is joined to the lower surface of the upper plate 40 by a cruciform lattice, and each end of the cross-shaped cross-shaped reinforcing member 420 is joined to the inner surface of each side plate 41 to be reinforced and installed, The upper surface is perforated and the periphery of the periphery of the cross-shaped reinforcement 420, the outer periphery end is composed of the intermediate partition 421 which is joined to the reinforcement is installed around the inner surface of each side plate (41).

In addition, the side plates 41 have a wide joint surface by forming a semicircular side plate bracket 410 at the end of the side plate 41 in order to disperse the stress concentration on the partition wall 20 outer plate and the joint surface as shown in FIG. 9. It is provided.

In addition, the upper and lower side plates 41 of the support structure 4 are provided with side plate openings 411 that vertically penetrate the lower surface portion below the junction of the intermediate partition 421 to allow for repair and repair.

1, 3 and 10, the partition wall 20 forms a reinforcement bar inwards along the center and side surfaces of the side plate 41, in order to distribute the load applied to the protector 3. Longitudinal reinforcement 202 having a reinforcing bar formed along side plate 41 center horizontal part and upper and lower side plate 41 inside the outer plate 20, and side plate 41 central longitudinal part and left and right inside the partition 20. It is provided with the horizontal reinforcement 201 which formed the reinforcement stand along the sub side plate 41. As shown in FIG.

The partition 20 is provided with a transverse bulkhead 200 and a longitudinal reinforcement 202 pre-installed when the marine structure 2 is dried. The transverse reinforcement 201 and the longitudinal reinforcement 202 are pre-installed at the same position. The transverse bulkhead 200 and the longitudinal stiffener 202 may be replaced.

Hereinafter, the operation according to the embodiment of the present invention will be described in connection with the accompanying drawings.

As shown in FIG. 4, the marine floating marine structure 2 is always at risk of damage to the hull due to the impact of the external collider 1. Thus, to protect the hull, the outer wall of the marine structure 2 is protected by the partition wall part 20, and the partition wall to protect the external attachment device 5 installed on the partition wall 20 and the marine structure 2 side. The protector 3 is provided in the outer plate of the part 20.

In the related art, the protector 3 is installed by directly connecting the partition 20 with a conventional protector support structure 4a having the same pipe structure as the protector 3 as shown in FIG. 6.

In this structure, when the protector 3 does not absorb all the impact loads, there is no place for buffering the remaining impact loads so that the stress is transferred to the partition 20 as it is.

Thus, the present invention cancels the residual impact load transferred from the protector 3 due to the box-shaped support structure 4 composed of the upper plate 40 and the side plates 41, and evenly distributes the stress to the partition 20. Disperse

In addition, the partition 20 has a longitudinal reinforcing material 201 and a horizontal reinforcing material 202 provided along the outer side of the support structure 4 side plate 41 to prevent depression due to impact, and to stress the peripheral reinforcement. It was equipped to be able to disperse.

12 to 17 is an exemplary view showing a comparison between the existing support structure and the permanently damaged damage distribution according to an embodiment of the present invention through structural analysis.

As shown in FIG. 4, when the collider 1 is collided with the protector 3 installed in the offshore structure, according to FIGS. 12 and 13, damage to the protector 3 can be seen by the impact.

However, when the existing support structure 4a and the support structure 4 are enlarged in FIGS. 14 and 15, in the conventional protector support structure 4a of FIG. 14, permanent deformation occurs at the partition 20 and the connection part. In the supporting structure 4 of FIG. 15, it can be seen that permanent deformation occurs in the upper plate 40 and the upper side of the side plate 41 and the internal reinforcing material 42, and hardly occurs below the middle of the supporting structure 4.

In addition, even when comparing FIG. 16 and FIG. 17 seen from the inside of the partition wall part 20, it can be seen that permanent deformation occurs in the partition wall part. In FIG. 17, the appearance of the marine structure 2 is changed. Little damage was seen.

Thus, if the conventional protector support structure 4a uses the partition 20 and the protector 3 as a simple connection means, the present invention provides a partition portion corresponding to the support structure 4 and the support structure 4. Due to the lateral stiffener 201 and the longitudinal stiffener 202 of 20) it is characterized in that it does not deform the appearance of the offshore structure 2 due to the cushioning and the stress distribution.

In addition, the side plate opening 411 allows for internal welding and repair.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

As described above, the present invention can effectively absorb the residual impact force that the protector did not absorb in the support structure together with the primary impact force absorption in the protector when a collision accident occurs, thereby maximizing the impact protection effect of the protector.

In addition, by minimizing the residual impact force transmitted to the hull of the marine structure to prevent permanent damage of the hull structure itself to prevent accidents such as oil spills.

In addition, the upper part of the support structure is composed of a wide plate, so there is enough room for member alignment when welding the support structure to the end of the protector. This can greatly increase productivity.

Claims (5)

In installing the protector to protect the external structure of the offshore structure and external attachments attached to the side of the offshore structure, A partition wall portion provided in an outer shape of the marine structure; A support structure installed on the partition wall and fixed to the protector; The support structure is provided for each end of the protector and the top plate is bonded to the end of the protector, Square side plates in which one side line is in contact with the partition plate outer plate and the other side line is in contact with each corner of the upper plate spaced apart from the partition wall outer plate by a predetermined distance; Shock absorbing support structure of the protector for ship collision protection for the floating marine structure, characterized in that the inner reinforcement is provided on the inner surface of the side plates facing each other and the top plate. The method of claim 1, The internal reinforcement of the support structure is provided in the lower portion of the upper plate connected to the protector and cross-shaped reinforcement to support the top plate and the four side plates surrounding the upper plate, A shock absorbing support structure for a ship collision protection protector for a floating marine structure, characterized in that the center of the perforated and the periphery upper periphery is formed by the intermediate partition to support and reinforce the cross-shaped reinforcement and the upper side of the side plate. The method of claim 1, The lower bottom of the side plates in contact with the partition wall portion is formed by a semi-circular side plate bracket to distribute the stress concentration to the load applied to the protector, the shock absorber of the impact protection protector for floating marine structures Support structure. The method of claim 1, The two side plates on the upper and lower sides of the support structure is a shock absorbing support structure of the protector for ship collision protection for floating marine structures, characterized in that the side plate opening is vertically penetrated for internal welding and repair. The method of claim 1, The partition wall portion reinforcement is installed in the inner side along the four sides of the support structure in contact with the partition wall portion is provided with two or more along the left and right sides of the support structure; The shock absorbing support structure of the protector for ship collision protection for floating marine structures, characterized in that provided with two or more longitudinal reinforcement provided along the upper and lower sides of the support structure.

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