CN111891310B - Surging motion suppression device for ship - Google Patents
Surging motion suppression device for ship Download PDFInfo
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- CN111891310B CN111891310B CN202010626824.5A CN202010626824A CN111891310B CN 111891310 B CN111891310 B CN 111891310B CN 202010626824 A CN202010626824 A CN 202010626824A CN 111891310 B CN111891310 B CN 111891310B
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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
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
- B63B39/005—Equipment to decrease ship's vibrations produced externally to the ship, e.g. wave-induced vibrations
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Abstract
The application relates to a surging motion suppression device for a ship, and relates to the field of single-point mooring engineering of ships. This surging motion suppression device includes first suppression pole and a suppression subassembly that two piece at least intervals set up, the one end of first suppression pole is used for linking to each other with boats and ships, and the other end is used for extending below the sea level at least partially, two of them the interlude of first suppression pole is used for linking to each other with the rotary platform system respectively, suppresses the subassembly and is used for locating first suppression pole extends to on the one end below the sea level, suppress the subassembly and be used for absorbing the partial kinetic energy of ocean current, with first suppression pole combined action is in order to suppress the surging motion of boats and ships. The surging motion suppression device is simple in structure, can effectively suppress surging motion of a ship in a single-point mooring state, and well solves the problems that the surging motion of the ship in the single-point mooring state is large in oscillation amplitude and long in attenuation time.
Description
Technical Field
The application relates to the field of single-point mooring engineering of ships, in particular to a surging motion suppression device for a ship.
Background
At present, in the engineering fields of offshore oil development engineering, offshore nuclear power plants and the like, a large ship needs to be moored in a certain specific sea area, and the common engineering is equipped with: the mooring device comprises a multi-point mooring system, a single-point mooring system, a dynamic positioning system and the like, wherein the single-point mooring system is called a soft rigid arm single-point mooring system, and the device is widely applied to shallow sea areas.
The marine environment acts on the ship to enable the ship to drift and swing, but under the action of the soft rigid arm, the mooring leg, the bearing and the rotary platform, the drifting and swinging motions of the ship are limited within a certain range, and dynamic balance is reestablished, so that the ship is anchored in a specific sea area. When the wave flow at sea is small or no, the drift of the ship at sea is small, which is called as a balance state; when the storm flow is large, acting force is generated on the ship body, the ship drives the rotary platform to rotate and swing to the state that the ship longitudinally faces the storm flow, the acting force of the storm flow is minimum at the moment and is called as a wind vane effect, and meanwhile, under the restraint of the mooring system, the ship moves in a back-and-forth shaking mode and is called as surging motion.
In the related art, when marine environments with different strengths and different types act on a single-point mooring system, surging motion is generally not controlled manually, and is found through actual monitoring of engineering cases: the existing ships in a single-point mooring state have surging motion, and particularly when the directions of sea stormy waves and currents are consistent, the surging motion amplitude of the ships is large, and the motion attenuation time is long. Although the ship surging motion reduces the impact load on the single-point mooring system, the stability of the single-point mooring system is greatly reduced, the service life of parts such as bearings is shortened, in addition, the surging motion of the ship is too violent, the operation difficulty of the ship is greatly increased, and the safety cannot be guaranteed.
Disclosure of Invention
The embodiment of the application provides a surging motion suppression device for a ship, and aims to solve the problems that in the related art, the surging motion of the ship in a single-point mooring state is large in oscillation amplitude and long in attenuation time.
In a first aspect, there is provided a surge motion suppression device for a vessel, comprising:
the device comprises at least two first restraining rods arranged at intervals, wherein one end of each first restraining rod is used for being connected with a ship, the other end of each first restraining rod is at least partially used for extending below the sea level, and the middle sections of the two first restraining rods are respectively used for being connected with a rotary platform system;
a suppression assembly for being disposed on an end of the first suppression bar extending below sea level, the suppression assembly for absorbing a portion of kinetic energy of the sea current.
In some embodiments, the suppression assembly comprises:
the two ends of the second restraining rod are respectively connected with the corresponding ends of two first restraining rods extending below the sea level;
a plurality of suppression devices disposed at intervals along a length of the second suppression bar, the suppression devices configured to absorb a portion of kinetic energy of the ocean current.
In some embodiments, the second suppression bar is a telescopic bar.
In some embodiments, the range of the telescopic length of the second restraining bar is not greater than the distance between two adjacent first restraining bars.
In some embodiments, the suppression assembly comprises at least two suppression devices, each of the suppression devices being provided at an end of a corresponding one of the first suppression rods extending below sea level, the suppression devices being configured to absorb a portion of kinetic energy of the sea current.
In some embodiments, the suppression component comprises a plurality of suppression devices configured to: at least two restraining devices are arranged on the partial rod section of each first restraining rod extending below the sea level at intervals along the length direction of the partial rod section, and the restraining devices are used for absorbing partial kinetic energy of sea current.
In some embodiments, the length of the first suppression rod ranges from 10 m to 40 m.
In some embodiments, the first suppression lever is adapted to be coupled to the vessel and the swing platform system via a universal joint, respectively.
In some embodiments, the distance between the universal joint arranged in the middle section of the first suppression rod and the end part of the first suppression rod, which is used for being connected with the ship, and the length ratio of the first suppression rod ranges from 1:5 to 4: 5.
In some embodiments, the suppression device is an ocean current generator.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a surging motion suppression device for a ship, which comprises a first suppression rod and a suppression assembly arranged below the sea level of the first suppression rod, wherein one end of the first suppression rod is connected to the ship, the other end of the first suppression rod extends below the sea level and is connected with the suppression assembly, the suppression assembly is mainly used for absorbing partial kinetic energy of sea current and reducing the impact force of the sea current on a ship body, so that the surging motion of the ship is suppressed and slowed down, the oscillation amplitude and the attenuation time of the surging motion are reduced, in addition, an integral structure formed by the first suppression rod and the suppression assembly can simultaneously generate a pair of reverse moments when the sea current impacts the integral structure, the rotation amplitude of the first suppression rod is reduced, and certain help is provided for suppressing the integral surging motion.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a surging motion suppression device for a ship according to embodiment 1 of the present application;
fig. 2 is a schematic overall structure diagram of the device for suppressing surge motion of a ship according to embodiment 1 of the present application when in use;
fig. 3 is a side view of the device for suppressing surge motion of a ship according to embodiment 1 of the present application in use;
fig. 4 is a schematic structural diagram of a surging motion suppression device for a ship according to embodiment 2 of the present application;
fig. 5 is a schematic view of the device for suppressing surge motion of a ship according to embodiment 2 of the present application in use;
fig. 6 is a schematic structural diagram of a surging motion suppression device for a ship according to embodiment 3 of the present application.
In the figure: 1-a first restraint bar, 2-a restraint assembly, 20-a second restraint bar, 21-a restraint device, 3-a vessel, 4-a rotating platform, 5-a tower, 6-a universal joint.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a surging motion suppression device for a ship, which can solve the problems of large oscillation amplitude and long attenuation time of surging motion of the ship in a single-point mooring state in the related art.
Example 1
Referring to fig. 1 to 3, the surging motion suppression device mainly includes at least two first suppression rods 1 and a suppression assembly 2, which are arranged at intervals, wherein one end of each first suppression rod 1 is used for connecting with a ship 3, the other end of each first suppression rod 1 is at least partially used for extending below the sea level, middle sections of the two first suppression rods 1 are respectively used for connecting with a rotary platform system, the rotary platform system mainly includes a tower 5, a rotary platform 4 arranged on the tower 5, and a steel structure arranged on the corresponding side of the rotary platform 4, which is also called as a soft rigid arm, and specifically, middle sections of the two first suppression rods 1 are respectively used for connecting with the soft rigid arm. The restraining component 2 is arranged at one end of the first restraining rod 1 extending below the sea level, and the restraining component 2 is mainly used for absorbing partial kinetic energy of the ocean current and reducing the impact force of the ocean current on the ship body, so that the aim of restraining and slowing down the surging motion of the ship 3 is fulfilled.
Specifically, the suppression assembly 2 mainly includes a second suppression rod 20 and a plurality of suppression devices 21, wherein two ends of the second suppression rod 20 are respectively connected with corresponding ends of two of the first suppression rods 1 extending below the sea level, the plurality of suppression devices 21 are arranged at intervals along the length direction of the second suppression rod 20, and the suppression devices 21 are used for absorbing part of kinetic energy of the ocean current to reduce the impact force of the ocean current on the ship body.
Specifically, the second restraining bar 20 is a telescopic bar, and can be changed in length to ensure that the structure cannot be damaged during twisting movement, and generally, the telescopic length range of the second restraining bar 20 is not greater than the distance between two adjacent first restraining bars 1.
Specifically, the length range of the first restraining rod 1 is 10-40 m, the actual length of the first restraining rod 1 can be determined according to the actual condition of the ship 3, and the first restraining rod 1 is respectively connected with the ship 3, the rotary platform system and the second restraining rod 20 in a rotating mode through universal joints 6 in order to ensure flexibility and good restraining effect because the ship moves in multiple degrees of freedom on the sea. The distance between the universal joint 6 arranged in the middle section of the first restraining rod 1 and the end part, connected with the ship 3, of the first restraining rod 1 is in a range of 1: 5-4: 5 with the length of the first restraining rod 1, and the distance is determined through calculation after actual conditions are needed and the requirements of a mooring system are combined.
When the sea storm flow is large, the ship 3 drives the mooring system under the effect of the wind vane, so that the ship 3 longitudinally faces the storm flow, the rod section of the upper part of the first restraining rod 1 is pulled to be far away from a mooring point, and torque is generated to rotate the first restraining rod 1, so that surging motion is formed. At this time, the ocean current impacts the second suppression rod 20 and the suppression device 21, the generated impact force is transmitted to the rod section of the lower portion of the first suppression rod 1, the direction of the impact force is the same as that of the pulling force generated by the ship 3, one end of the soft rigid arm is connected with the middle section of the first suppression rod 1, so that the pulling force of the ship 3 is opposite to that of the ocean current impact force relative to the soft rigid arm, the pair of opposite moments are superposed, the moment for driving the first suppression rod 1 to rotate is reduced, the rotation amplitude of the first suppression rod 1 is specifically reduced, and the oscillation amplitude of the first suppression rod 1 can be effectively reduced. The suppression device 21 is preferably an ocean current generator, so that ocean current drives the suppression device to operate, so that electric power is generated, the electric power can be used by other electric devices on the ship, energy conservation and environmental protection are achieved, the ocean current generator absorbs partial kinetic energy of the ocean current, the impact force of the ocean current on the ship body is directly reduced, the surging motion of the ship 3 is further reduced, the oscillation amplitude and the attenuation time of the surging motion are also reduced, and the suppression device is helpful for suppressing the surging motion of the whole ship 3.
Example 2
The present embodiment differs from embodiment 1 in that, referring to fig. 4-5, the suppression assembly 2 includes at least two suppression devices 21, each suppression device 21 is disposed at one end of a corresponding first suppression rod 1 extending below the sea level, and the suppression devices 21 are used for absorbing part of the kinetic energy of the sea current.
Specifically, at least two first suppression rods 1 are arranged at equal intervals in the width direction of the ship 3, and one suppression device 21 is arranged at one end of each first suppression rod 1 extending below the sea level. When the sea storm flow is large, the ship 3 drives the mooring system under the effect of the wind vane, so that the ship 3 longitudinally faces the storm flow, the rod section of the upper part of the first restraining rod 1 is pulled to be far away from the mooring point, and torque is generated to rotate the first restraining rod 1, so that surging motion is formed. At the moment, the ocean current impacts the ocean current generator, the ocean current generator converts part of kinetic energy of the ocean current into electric energy, meanwhile, the generated impact force acts on the rod section of the lower portion of the first restraining rod 1, the rod section is in the same direction as the pulling force generated by the ship 3, one end of the soft rigid arm is connected with the middle section of the first restraining rod 1, therefore, the pulling force of the ship 3 is opposite to the moment of the soft rigid arm relative to the ocean current impact force, the pair of opposite moments are superposed, the moment for driving the first restraining rod 1 to rotate is reduced, and the longitudinal oscillation motion of the ship 3 is effectively restrained.
Example 3
The present embodiment differs from embodiment 1 in that, referring to fig. 6, the restraining assembly 2 includes a plurality of restraining devices 21, the plurality of restraining devices 21 being configured to: at least two suppression devices 21 are arranged on the part of each first suppression rod 1 extending below the sea level at intervals along the length direction of the first suppression rod, and the suppression devices 21 are used for absorbing part of kinetic energy of the sea current.
Specifically, at least two first suppression rods 1 are arranged at equal intervals along the width direction of the ship 3, at least two suppression devices 21 are arranged at equal intervals from bottom to top along the length direction of each first suppression rod 1 on one end portion extending below the sea level, and similarly, when surging motion is formed, sea current impacts a sea current generator, the sea current generator converts part of kinetic energy of the sea current into electric energy, and simultaneously, generated impact force acts on a rod section of the first suppression rod 1 located at the lower portion and is in the same direction as pulling force generated by the ship 3.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A surge motion suppression device for a marine vessel, characterized in that it comprises:
the device comprises at least two first restraining rods (1) which are arranged at intervals, wherein one end of each first restraining rod (1) is used for being connected with a ship (3), the other end of each first restraining rod (1) is at least partially used for extending to the position below the sea level, and the middle sections of the two first restraining rods (1) are respectively used for being connected with a rotary platform system;
-a dampening assembly (2) comprising:
-a second suppression bar (20) having two ends connected to respective ends of two of said first suppression bars (1) extending below sea level;
-a plurality of suppression devices (21), a plurality of said suppression devices (21) being arranged at intervals along the length of said second suppression bar (20), said suppression devices (21) being adapted to absorb part of the kinetic energy of the sea current; or
The suppression assembly (2) comprises at least two suppression devices (21), each suppression device (21) is arranged at one end of the corresponding first suppression rod (1) extending below the sea level, and the suppression devices (21) are used for absorbing part of kinetic energy of sea current; or
The suppression assembly (2) comprises a plurality of suppression devices (21), the plurality of suppression devices (21) being configured to: at least two restraining devices (21) are arranged on the part of each first restraining rod (1) extending to the position below the sea level at intervals along the length direction of the first restraining rod, and the restraining devices (21) are used for absorbing part of kinetic energy of the sea current.
2. A surge motion suppression apparatus for a marine vessel as claimed in claim 1, wherein: the second restraining bar (20) is a telescopic bar.
3. A surge motion suppression apparatus for a marine vessel as claimed in claim 2, wherein: the telescopic length range of the second restraining rod (20) is not more than the distance between two adjacent first restraining rods (1).
4. A surge motion suppression apparatus for a marine vessel as claimed in claim 1, wherein: the length range of the first restraining rod (1) is 10-40 m.
5. A surge motion suppression apparatus for a marine vessel as claimed in claim 1, wherein: the first restraining rod (1) is respectively used for being connected with the ship (3) and the rotary platform system through a universal joint (6).
6. A surge motion suppression apparatus for a marine vessel as claimed in claim 5, wherein: the distance between a universal joint (6) arranged in the middle section of the first restraining rod (1) and one end part of the first restraining rod (1) used for being connected with the ship (3) and the length ratio of the first restraining rod (1) is 1: 5-4: 5.
7. A surge motion suppression apparatus for a marine vessel as claimed in claim 1, wherein: the restraining device (21) is an ocean current generator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010626824.5A CN111891310B (en) | 2020-07-01 | 2020-07-01 | Surging motion suppression device for ship |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010626824.5A CN111891310B (en) | 2020-07-01 | 2020-07-01 | Surging motion suppression device for ship |
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| CN111891310A CN111891310A (en) | 2020-11-06 |
| CN111891310B true CN111891310B (en) | 2021-06-18 |
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| CN113401300B (en) * | 2021-08-23 | 2021-12-31 | 南通中舟联合船务工程有限公司 | Wave-proof device and ship thereof |
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| FR2450740A1 (en) * | 1979-03-08 | 1980-10-03 | Bluewater Terminal Systems Nv | SINGLE POINT PERMANENT MOORING SYSTEM |
| JPS60219191A (en) * | 1984-04-13 | 1985-11-01 | Mitsubishi Heavy Ind Ltd | Single point mooring device |
| CN108382530A (en) * | 2018-03-16 | 2018-08-10 | 广州船舶及海洋工程设计研究院 | A kind of single point mooring's hull yawing motion control device |
| CN108982057A (en) * | 2018-05-29 | 2018-12-11 | 大连理工大学 | A kind of soft rigid arm mooring model assay systems waterborne |
| CN110422294A (en) * | 2019-08-23 | 2019-11-08 | 山东鼎盛精工股份有限公司 | A kind of list column mooring formula well head production operation platform |
| CN110435837A (en) * | 2019-07-25 | 2019-11-12 | 天津大学青岛海洋技术研究院 | A method of avoid mild steel arm and floating production storage tanker stem from colliding |
| CN210793523U (en) * | 2019-10-15 | 2020-06-19 | 大连船舶重工集团有限公司 | Mooring device with low swing amplitude |
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2020
- 2020-07-01 CN CN202010626824.5A patent/CN111891310B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2450740A1 (en) * | 1979-03-08 | 1980-10-03 | Bluewater Terminal Systems Nv | SINGLE POINT PERMANENT MOORING SYSTEM |
| JPS60219191A (en) * | 1984-04-13 | 1985-11-01 | Mitsubishi Heavy Ind Ltd | Single point mooring device |
| CN108382530A (en) * | 2018-03-16 | 2018-08-10 | 广州船舶及海洋工程设计研究院 | A kind of single point mooring's hull yawing motion control device |
| CN108982057A (en) * | 2018-05-29 | 2018-12-11 | 大连理工大学 | A kind of soft rigid arm mooring model assay systems waterborne |
| CN110435837A (en) * | 2019-07-25 | 2019-11-12 | 天津大学青岛海洋技术研究院 | A method of avoid mild steel arm and floating production storage tanker stem from colliding |
| CN110422294A (en) * | 2019-08-23 | 2019-11-08 | 山东鼎盛精工股份有限公司 | A kind of list column mooring formula well head production operation platform |
| CN210793523U (en) * | 2019-10-15 | 2020-06-19 | 大连船舶重工集团有限公司 | Mooring device with low swing amplitude |
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