KR20140085665A - Viscoelastic material damping system and collecting system of seabed mineral resources having the same - Google Patents

Viscoelastic material damping system and collecting system of seabed mineral resources having the same Download PDF

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Publication number
KR20140085665A
KR20140085665A KR1020120153873A KR20120153873A KR20140085665A KR 20140085665 A KR20140085665 A KR 20140085665A KR 1020120153873 A KR1020120153873 A KR 1020120153873A KR 20120153873 A KR20120153873 A KR 20120153873A KR 20140085665 A KR20140085665 A KR 20140085665A
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KR
South Korea
Prior art keywords
fixed
seabed
pipeline
movable frame
frame
Prior art date
Application number
KR1020120153873A
Other languages
Korean (ko)
Inventor
강수창
조우연
이종관
Original Assignee
주식회사 포스코
재단법인 포항산업과학연구원
포스코신기술연구조합
주식회사 포스코건설
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Publication date
Application filed by 주식회사 포스코, 재단법인 포항산업과학연구원, 포스코신기술연구조합, 주식회사 포스코건설 filed Critical 주식회사 포스코
Priority to KR1020120153873A priority Critical patent/KR20140085665A/en
Publication of KR20140085665A publication Critical patent/KR20140085665A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/12—Laying or reclaiming pipes on or under water
    • F16L1/123—Devices for the protection of pipes under water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
    • F16L3/16—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe
    • F16L3/20—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe allowing movement in transverse direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers

Abstract

Disclosed is a viscoelastic damping device for preventing fatigue failure of pipelines transporting submarine resources and a submarine resource harvesting system having the same.
The viscoelastic damping device disclosed is a fixed frame fixed to a seabed ground; A movable frame fixed to a subsea pipeline where a vibration load is applied to the body; And a viscoelastic body which binds the fixed frame and the movable frame and absorbs the vibration load of the submarine pipeline supported by the fixed frame and transmitted from the movable frame to attenuate the amplitude of the submarine pipeline.
Also disclosed is a marine resource harvesting system comprising: a floating structure floating on the sea; A submarine pipeline connected between the offshore structure and the seabed well to provide a transportation path through which resources buried in the seabed well are transported to the offshore structure; And the viscoelastic damping device fastened to the undersea pipeline while being fixed to the seabed ground to attenuate vibration loads generated in the undersea pipeline.
According to the viscoelastic damping device and the seabed resource harvesting system, the fatigue performance of the submarine pipeline is improved by absorbing the vibration energy of the portion vulnerable to fatigue failure in the submarine pipeline through the viscoelastic body to attenuate the amplitude of the submarine pipeline Effect can be obtained.

Description

TECHNICAL FIELD [0001] The present invention relates to a viscoelastic damping device and a submarine resource harvesting system having the same.

More particularly, the present invention relates to a viscoelastic damping device for preventing fatigue failure of pipelines transporting submarine resources and a submarine resource harvesting system having the viscoelastic damping device.

Underwater pipelines are pipelines laid on the seabed to transport oil and gas buried in submarine oil wells.

1 is a schematic diagram showing a subsea pipeline 20 according to the prior art.

1, generally the undersea pipeline 20 can be divided into a riser 22 and a flow-line 23.

The flow line 23 is connected between the riser 22 and the submarine oil well W and is connected to the bottom surface of the sea bed W. The riser 22 is a pipe that is disposed between the sea structure 10 and the sea bed, It is a pipe to be placed.

In the seabed resource harvesting system using the undersea pipeline 20, the marine structure 10 is continuously moved by the influence of waves, tides, winds, typhoons, etc., and the riser 22 is also vibrated by waves or tides .

As a result, a large dynamic displacement occurs periodically at the connection portion with the sea structure 10 at the upper end of the riser 22, and the entire riser 22 is greatly deformed.

Particularly, the riser 22 receives a large stress at the TDP (Touch Down Point) portion that is initially placed on the seabed ground, and fatigue failure occurs by repeating this large stress periodically.

This shape becomes worse as it goes to the deep sea. That is, the TDP portion of the undersea pipeline 20 becomes very susceptible to fatigue failure because the smaller vibration at the upper end of the riser 22 is amplified more in the TDP portion as the riser 22 becomes longer in the deep sea.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a viscoelastic damping device capable of improving fatigue performance of a portion vulnerable to fatigue failure of a submarine pipeline and a submarine resource harvesting system having the same. .

According to one aspect of the present invention, there is provided an elevating apparatus comprising: a fixed frame fixed to a seabed ground; A movable frame fixed to a subsea pipeline where a vibration load is applied to the body; And a viscoelastic damping device which binds the fixed frame and the movable frame and absorbs a vibration load of the submarine pipeline which is supported by the fixed frame and is transmitted from the movable frame to attenuate the amplitude of the submarine pipeline to provide.

In one embodiment, the movable frame is formed with a receiving space portion in which the fixed frame is received, the fixed frame is disposed in a receiving space portion of the movable frame, and the viscoelastic body is disposed in a gap between the fixed frame and the movable frame So that the fixed frame and the movable frame can be coupled.

Further, in one embodiment, the movable frame is provided with a pipe fastening portion which is fastened to the submarine pipeline, and the fastening frame may be provided with a support portion fixed to the seabed ground.

Here, the support part may be provided with a fixation file that penetrates the seabed ground and fixes the support part to the seabed ground.

According to an embodiment of the present invention, a stiffener may be provided on a joint between the fixed frame and the support to reinforce connection strength between the fixed frame and the support.

According to another aspect of the present invention, there is provided a marine structure floating on the sea; A submarine pipeline connected between the offshore structure and the seabed well to provide a transportation path through which resources buried in the seabed well are transported to the offshore structure; And the viscoelastic damping device fastened to the submarine pipeline while being fixed to the seabed ground to attenuate the vibration load generated in the submarine pipeline.

In one embodiment, the viscoelastic damping device may be installed at a touch down point (TDP) point of the undersea pipeline.

According to one embodiment of the present invention having such a configuration, the fatigue performance of the submarine pipeline is improved by absorbing the vibration energy of a portion vulnerable to fatigue failure in the submarine pipeline through the viscoelastic body to attenuate the amplitude of the submarine pipeline Can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic diagram showing a subsea pipeline according to the prior art; Fig.
2 is a schematic diagram illustrating a submarine resource harvesting system according to an embodiment of the present invention.
3 is a perspective view of a viscoelastic damping device in accordance with an embodiment of the present invention.
4 is an operational view of the viscoelastic damping device shown in Fig.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Furthermore, the singular forms "a", "an," and "the" include plural referents unless the context clearly dictates otherwise.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

However, in order to facilitate understanding of the invention, a system for obtaining a seabed resource according to an embodiment of the present invention will be described first, and a viscoelastic damping device according to an embodiment of the present invention will be described.

First, referring to FIG. 2, a submarine resource collection system 1 according to an embodiment of the present invention will be described.

2, a submarine resource harvesting system 1 according to an embodiment of the present invention includes a marine structure, a subsea pipeline 100, and a viscoelastic damping device 200 according to an embodiment of the present invention can do.

The marine structure is a floating structure on the sea, and can be constructed of a harvesting vessel or an offshore plant.

The submarine pipeline 100 may be connected between the seabed well W and the sea structure to provide a transportation path through which resources such as oil and gas buried in the seabed well W are transported to the sea structure.

The undersea pipeline 100 may include a riser 110 suspended between the sea structure and the seabed and floated in the sea and a flow line 120 connected to the seabed well W and placed on the seabed ground .

Repeated vibrations are generated in the undersea pipeline 100 due to the movement of waves, tides, winds, typhoons and the like of the offshore structure and the waves and tidal currents received by the undersea pipeline 100 itself.

The viscoelastic damping device 200 may be coupled to the submarine pipeline 100 while being fixed to the seabed ground so as to attenuate vibration loads generated in the submarine pipeline 100.

It is preferable that such a viscoelastic damping device 200 is disposed in a portion vulnerable to fatigue failure in the subsea pipeline 100.

Thus, in one embodiment, the viscoelastic damping device 200 may be installed at a touch down point (TDP) point of the undersea pipeline 100, that is, a portion where the undersea pipeline 100 is initially located on the seabed surface.

Here, the TDP point of the undersea pipeline 100 is a portion where the riser 110 and the flow line 120 are connected to each other, so that a large vibration can be generated even by a small movement of the sea structure, It is very vulnerable to fatigue failure.

However, the location of the viscoelastic damping device 200 in the seabed resource harvesting system 1 according to the embodiment of the present invention is not limited to the TDP point as described above, Depending on various conditions such as the type of offshore structure, it can be installed in any place vulnerable to fatigue failure.

3 and 4, a detailed description will be made of a viscoelastic damping device 200 according to an embodiment of the present invention, which is provided in the seabed resource harvesting system 1 according to an embodiment of the present invention. FIG. 3 is a perspective view of a viscoelastic damping device 200 according to an embodiment of the present invention, and FIG. 4 is an operational state diagram of a viscoelastic damping device 200.

3 to 4, the viscoelastic damping device 200 according to an embodiment of the present invention may include a fixed frame 220, a movable frame 210, and a viscoelastic body 230.

The fixed frame 220 is a member fixed to the seabed so that no dynamic deformation occurs. The fixed frame 220 may be fixed to the seabed ground and protrude from the seabed.

In one embodiment, the stationary frame 220 may be provided with a support 250 that is fixed to the seabed ground. The supporting part 250 may be a steel plate having corrosion resistance against seawater and the fixing frame 220 may have a structure protruding upward from the upper surface of the supporting part 250.

In order to fix the supporter 250 to the bottom of the sea bed, the bottom of the supporter 250 may be provided with a fusing file 260 that penetrates the bottom of the sea bed and fixes the supporter 250 to the subsoil have.

A stiffener 225 may be further provided at the joint between the stationary frame 220 and the support 250 to reinforce the connection strength between the stationary frame 220 and the support 250. The stiffener 225 can prevent the fixing frame 220 from moving or the dynamic deformation of the joint between the fixing frame 220 and the supporting part 250 in the supporting part 250 fixed to the seabed ground.

Particularly, since the viscoelastic damping device 200 according to the embodiment of the present invention absorbs the vibrational load of the submarine pipeline 100 by the viscoelastic body 230 to be described later, the amplitude of the submarine pipeline 100 must be attenuated, The fixed frame 220 should have structural performance that does not deform or operate against strong vibrational loads of the undersea pipeline 100.

The stiffener 225 reinforces the connection strength between the stationary frame 220 and the support 250 so that the stationary frame 220 is supported by the support 250 in a high vibration load, It can be fixed with rigidity.

Meanwhile, the movable frame 210 may be fixed to the undersea pipeline 100 where a vibration load is generated in the body. To this end, in one embodiment, the movable frame 210 may be provided with a pipe fastening portion 240 which is fastened to the subsea pipeline 100.

Here, the pipe coupling part 240 may be formed in the shape of a pipe that can surround a part of the circumference and the longitudinal direction of the subsea pipeline 100. Since the pipe connecting portion 240 constructed in a pipe shape can secure a large contact surface with the undersea pipeline 100, stress concentration at the connection portion between the submarine pipeline 100 and the movable frame 210 can be alleviated .

However, the pipe coupling part 240 is not limited to the above-described construction, and may be constructed with various known coupling structures that can firmly connect the submarine pipeline 100 and the movable frame 210. [

Although not shown, a stiffener (not shown) is provided at the joint between the movable frame 210 and the pipe fastening part 240 to reinforce the connection strength of the fastening frame 220 and the support part 250 .

Meanwhile, the movable frame 210 may have a receiving space 212 in which the stationary frame 220 is received. 3 and FIG. 4, the present invention is not limited thereto, and the stationary frame 220 may be mounted on the movable frame 210, As shown in FIG.

The viscoelastic body 230 binds the fixed frame 220 and the movable frame 210 and supports the vibration load of the undersea pipeline 100 supported by the fixed frame 220 and transmitted from the movable frame 210 Can be absorbed.

Thus, when the vibrational load of the undersea pipeline 100 is absorbed in the viscoelastic body 230, the amplitude of the undersea pipeline 100 can be attenuated.

The viscoelastic body 230 is provided in the gap between the fixed frame 220 and the movable frame 210 disposed in the accommodation space 212 of the movable frame 210 and is fixed to the fixed frame 220 So that the movable frame 210 can be bound.

The viscoelastic body 230 has elasticity and viscosity, and absorbs vibration through elasticity and attenuates the magnitude of the vibration absorbed through the viscosity. As described above, since the viscoelastic body 230 having elasticity in addition to the viscoelasticity generates a nonlinear stress with respect to the external load, the magnitude of the external load can be damped.

The viscoelastic body 230 also has a strength to such an extent that it can respond to a high level of vibration load of the undersea pipeline 100 without deformation.

To this end, as an example, the viscoelastic body 230 may be composed of a hard rubber or a steel and a rubber compound.

Since the viscoelastic body 230 is disposed in the sea, it is preferable that the viscoelastic body 230 is made of a material having corrosion resistance against seawater. However, the present invention is not limited thereto. Even if the corrosion resistance to seawater is not satisfied, Corrosion resistance may be achieved through the packaging of corrosive materials.

4, when an external force F is applied to the movable frame 210, the viscoelastic body 230 is deformed by shearing to form the movable frame 210 The amplitude of the undersea pipeline 100 subjected to the vibration load can be attenuated.

And, the subsea pipeline 100 with reduced amplitude results in improved performance to the endothelium.

While the present invention has been particularly shown and described with reference to particular embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention as defined by the following claims I would like to make it clear.

1: Submarine resource collection system
100: Subsea pipeline
110: riser 120: flow line
200: Viscoelastic damping device
210: movable frame 212:
220: fixed frame 225: stiffener
230: Viscoelastic body 240: Pipe fastening part
250: support part 260: settlement file

Claims (7)

A fixed frame fixed to the seabed ground;
A movable frame fixed to a subsea pipeline where a vibration load is applied to the body;
A viscoelastic body which binds the fixed frame and the movable frame, absorbs the vibration load of the submarine pipeline supported by the fixed frame and transmitted from the movable frame, and attenuates the amplitude of the submarine pipeline;
/ RTI > The method according to claim 1,
Wherein the movable frame is formed with a receiving space portion for receiving the fixed frame,
Wherein the fixed frame is disposed in a receiving space portion of the movable frame,
Wherein the viscoelastic body is provided in a gap between the fixed frame and the movable frame to bind the fixed frame and the movable frame. The method according to claim 1,
Wherein the movable frame is provided with a pipe fastening portion which is fastened to a submarine pipeline,
Wherein the fixed frame is provided with a supporting part fixed to the seabed ground. The method of claim 3,
Wherein the support portion is provided with a fixation file that penetrates the bottom of the seabed and fixes the support to the bottom of the seabed. The method of claim 3,
Wherein the joint between the fixed frame and the support portion is provided with a stiffener for reinforcing the connection strength between the fixed frame and the support portion. Floating structures floating on the sea;
A submarine pipeline connected between the offshore structure and the seabed well to provide a transportation path through which resources buried in the seabed well are transported to the offshore structure; And
The viscoelastic damping device according to any one of claims 1 to 5, which is fastened to the submarine pipeline while being fixed to the seabed ground to attenuate vibration loads generated in the submarine pipeline.
Wherein the system comprises: The method according to claim 6,
Wherein the viscoelastic damping device is installed at a TDP (touch down point) of the submarine pipeline.
KR1020120153873A 2012-12-26 2012-12-26 Viscoelastic material damping system and collecting system of seabed mineral resources having the same KR20140085665A (en)

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KR1020120153873A KR20140085665A (en) 2012-12-26 2012-12-26 Viscoelastic material damping system and collecting system of seabed mineral resources having the same

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Application Number Priority Date Filing Date Title
KR1020120153873A KR20140085665A (en) 2012-12-26 2012-12-26 Viscoelastic material damping system and collecting system of seabed mineral resources having the same

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112377556A (en) * 2020-10-22 2021-02-19 绍兴文理学院 Combined vibration damper for suspension tunnel pipe body and anchor cable
CN112377560A (en) * 2020-10-22 2021-02-19 绍兴文理学院 Suspension tunnel body disc vibration suppression ware

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112377556A (en) * 2020-10-22 2021-02-19 绍兴文理学院 Combined vibration damper for suspension tunnel pipe body and anchor cable
CN112377560A (en) * 2020-10-22 2021-02-19 绍兴文理学院 Suspension tunnel body disc vibration suppression ware

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