CN109774875B - Device for passively slowing down relative rotation of ultra-large floating body - Google Patents
Device for passively slowing down relative rotation of ultra-large floating body Download PDFInfo
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- CN109774875B CN109774875B CN201910158363.0A CN201910158363A CN109774875B CN 109774875 B CN109774875 B CN 109774875B CN 201910158363 A CN201910158363 A CN 201910158363A CN 109774875 B CN109774875 B CN 109774875B
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Abstract
The invention relates to a device for passively slowing down relative rotation of a super-large floating body, which comprises main bases and auxiliary bases, wherein the main bases are arranged at intervals, the auxiliary bases are provided with holes, the outer sides of the auxiliary bases are abutted with sliding rods, one end of a guide rod is connected with the inner side of the main bases, the other end of the guide rod sequentially penetrates through the holes of the auxiliary bases and the sliding rods, and a slowing device for slowing down rotation is wound on the periphery of the guide rod; and a plurality of torsion bars are symmetrically arranged between the main base and the auxiliary base by taking the guide rod as a center, one end of each torsion bar is hinged with the main base, and the other end of each torsion bar is hinged with the auxiliary base. The invention has simple structure, convenient use and higher independence, can realize passive motion limitation and provide restoring force through the main base, the auxiliary base, the guide rod and the torsion bar, has stronger damping without manual intervention and is more convenient to install and disassemble at sea.
Description
Technical Field
The invention relates to the technical field of ocean engineering, in particular to a device for passively slowing down relative rotation of an ultra-large floating body.
Background
The marine ultra-large floating body is formed by mutually connecting a plurality of modules through connectors, and can be longitudinally connected in series or transversely connected in parallel. In complex marine environments, the buoyancy changes are created by the movement of the ultra-large floating bodies in the waves, which in turn results in large wave loads. If the ultra-large floating body adopts rigid connection, huge vertical external load can be generated instantly once the ultra-large floating body encounters waves with large wavelength; in addition, if a wave is encountered, the lateral external load and the torsional load are relatively easy to occur and increase sharply. In this case, the weakest structure in the direction of the length of the vessel will be most vulnerable to damage, while the connection part of the marine ultra-large floating body is necessarily the weakest, most critical and most important part of the whole system due to the modular construction. Generally, for the offshore ultra-large floating body, the flexible connector can absorb part of energy by proper elastic deformation to achieve the effect of reducing stress. The reasonable flexible connector of the ultra-large floating body module has important significance on the normal operation and the structural safety of the ultra-large floating body.
Currently, except for the U.S. launch MOB programs, companies have designed hinged connectors that are rigid or have a rubber taper to provide cushioning, and lack the necessary functionality. With the gradual and deep research of marine ultra-large floats developed in China, the connection mode and the connector structure form are more and more extensive, particularly, the application of the hinged flexible connector is common, but in the using process, the relative pitching among the ultra-large float modules is completely unconstrained, and the unconstrained condition greatly influences the continuity of decks and the integrity of runways of the ultra-large float modules, so that certain damping is added in the relative rotation process to reduce the motion amplitude or generate corresponding restoring moment to enable the modules to restore the previous state as soon as possible, and the design is blank at present.
Disclosure of Invention
The applicant aims at the existing problems and carries out research and improvement, and provides a device for dynamically slowing down relative rotation of an ultra-large floating body, which can slow down relative pitching rotation of modules in the large floating body during hinged flexible connection and ensure stable connection and rotation stability of the ultra-large floating body modules under the action of various complex loads.
The technical scheme adopted by the invention is as follows:
a device for passively slowing down relative rotation of an ultra-large floating body comprises main bases and auxiliary bases, wherein the main bases are arranged at intervals, the auxiliary bases are provided with holes, sliding rods are abutted to the outer sides of the auxiliary bases, one ends of guide rods are connected with the inner sides of the main bases, the other ends of the guide rods sequentially penetrate through the holes of the auxiliary bases and the sliding rods, and a slowing device for slowing down rotation is wound on the peripheries of the guide rods; and a plurality of torsion bars are symmetrically arranged between the main base and the auxiliary base by taking the guide rod as a center, one end of each torsion bar is hinged with the main base, and the other end of each torsion bar is hinged with the auxiliary base.
The further technical scheme is as follows:
the guide rod is a hollow cylinder or a solid cylinder made of steel materials;
the main base and the auxiliary base are both made of high-strength steel;
the retarding device is any one of a damper or a spring;
the torsion bar comprises a cylinder with a cavity, a baffle is arranged in the cylinder and divides the cavity into two parts to form a first cavity and a second cavity, a first damper is arranged in the first cavity, a second damper is arranged in the second cavity, one end of a piston rod extends into the first cavity and is connected with one side of the baffle, and the other end of the piston rod is hinged with a main base through a first spherical hinge; the cylinder body is also connected with one end of a straight rod at a position close to the second cavity, and the other end of the straight rod is hinged with an auxiliary base through a second spherical hinge;
one end of the cylinder body connecting straight rod is closed, and the other end of the cylinder body is provided with a hole for the piston rod to penetrate through;
the first damper and the second damper may be any one of a solid medium, a liquid medium, and a gas medium.
The invention has the following beneficial effects:
the invention has simple structure, convenient use and higher independence, can realize passive motion limitation and provide restoring force through the main base, the auxiliary base, the guide rod and the torsion bar, has stronger damping without manual intervention and is more convenient to install and disassemble at sea.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a top sectional view of the present invention as it rotates.
Figure 3 is a side cross-sectional view of the invention as it rotates.
FIG. 4 is a front sectional view of the torsion bar of the present invention.
Wherein: 1. a main base; 2. a slide bar; 3. a sub-base; 4. a guide bar; 5. a torsion bar; 501. a piston rod; 502. a first spherical hinge; 503. a straight rod; 504. a second spherical hinge; 505. a barrel; 506. a first damping; 507. a baffle plate; 508. and (7) second damping.
Detailed Description
The following describes specific embodiments of the present invention.
As shown in figure 1, the passive relative rotation retarding device for the ultra-large floating body comprises main bases 1 arranged at intervals and auxiliary bases 3 provided with holes, wherein the main bases 1 and the auxiliary bases 3 are both made of high-strength steel, and the outer ends of the main bases 1 are connected with an upper platform of an ultra-large floating body module. The hole is arranged at the center of the auxiliary base 3, the outer side of the auxiliary base 3 is abutted with the sliding rod 2, one end of the sliding rod 2 is fixedly connected with a flange plate, and the flange opening of the flange plate is concentric with the hole of the auxiliary base 3. The other end of the slide bar 2 is connected with an outer side notch of the upper platform of the ultra-large floating body module, and the slide bar has a one-way sliding function. One end of a guide rod 4 is welded with the inner side of the main base 1, the other end of the guide rod 4 sequentially penetrates through a hole of the auxiliary base 3 and a flange opening of a flange plate in the sliding rod 2, the guide rod 4 and the hole of the auxiliary base 3 are in clearance fit without friction, and the guide rod 4 is a hollow cylinder or a solid cylinder made of steel materials. A damping means for damping rotation is wound around the outer periphery of the guide rod 4, and the damping means employs any one of a damper and a spring. A plurality of torsion bars 5 are symmetrically arranged between the main base 1 and the auxiliary base 3 by taking the guide rod 4 as a center, one end of each torsion bar 5 is hinged with the main base 1, and the other end of each torsion bar 5 is hinged with the auxiliary base 3.
As shown in fig. 1, the torsion bar 5 is a single-axis damper, as shown in fig. 3, the number of torsion bars 5 in this embodiment is 4, 2 to 6 torsion bars can be arranged according to different working conditions, the torsion bar comprises a cylinder 505 with a chamber, the cylinder 505 is a cylinder, a baffle 507 is arranged inside the cylinder 505 and divides the chamber into two parts to form a first chamber and a second chamber, no friction or little friction is generated between the baffle 507 and the cylinder 505, lubricating oil should be added to avoid blocking during use, and a guide rail and a bearing may be provided if necessary. A first damper 506 is arranged in the first chamber, a second damper 508 is arranged in the second chamber, one end of the piston rod 501 extends into the first chamber and is connected with one side of the baffle 507, and the other end of the piston rod 501 is hinged with the main base 1 through a first spherical hinge 502; the cylinder 505 is also connected with one end of the straight rod 503 near the second chamber, and the other end of the straight rod 503 is hinged with the auxiliary base 3 through the second spherical hinge 504.
One end of the cylinder 505 connected with the straight rod 503 is closed, and the other end of the cylinder 505 is provided with an opening for the piston rod 501 to penetrate through. The first damper 506 and the second damper 508 may be any one of a solid medium (e.g., rubber, spring), a liquid medium (e.g., oil), or a gas medium (e.g., air or nitrogen). If gas or liquid damping is used, the barrel 505 also needs to be gas and liquid tight.
In order to ensure the uniformity of stress, 1-10 super-large floating bodies can be arranged between adjacent modules of adjacent super-large floating bodies along the Y direction, wherein the Y direction refers to the transverse direction in a three-dimensional Cartesian coordinate system.
The working process of passively slowing down the relative rotation of the invention is as follows:
a plurality of sets of flexible connectors are adopted between adjacent modules of the ultra-large floating body to be connected front and back and release pitching, so that excessive rotation caused by no restriction can be avoided when huge load generated by pitching is avoided. As shown in fig. 1, 2 and 3, when relative movement occurs between the ultra-large floating body modules, the outer end of the main base 1 is fixedly connected with the upper platform of the ultra-large floating body module, so that the main base rotates along with the ultra-large floating body module, as shown in fig. 3, the torsion bar 5 also moves relatively during rotation, the torsion bar 5 bears stretching and compression and simultaneously provides certain damping to generate restoring force, and the baffle 507 not only transmits stress during stretching and compression of the damping, but also provides a function of supporting the damping. When one end of the damper is in tension, the other end of the damper is compressed due to load transfer of the damper 507 and vice versa, thereby absorbing excessive rotation. The first damper 506 and the second damper 508 may be used with the same parameters or different parameters depending on the statistical probability of tension and compression, and different damping coefficients may be selected during testing to achieve various desired stiffnesses.
The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, the scope of the invention being defined by the appended claims, which may be modified in any manner without departing from the basic structure thereof.
Claims (7)
1. The utility model provides a relative pivoted device is slowed down to super large-scale body passive form which characterized in that: the device comprises main bases (1) and auxiliary bases (3) which are arranged at intervals, wherein holes are formed in the auxiliary bases (3), the outer sides of the auxiliary bases (3) are abutted to sliding rods (2), one ends of guide rods (4) are connected with the inner sides of the main bases (1), the other ends of the guide rods (4) sequentially penetrate through the holes of the auxiliary bases (3) and the sliding rods (2), and retarding devices for retarding rotation are wound on the peripheries of the guide rods (4); a plurality of torsion bars (5) are symmetrically arranged between the main base (1) and the auxiliary base (3) by taking the guide rod (4) as a center, one end of each torsion bar (5) is hinged with the main base (1), and the other end of each torsion bar (5) is hinged with the auxiliary base (3);
the outer end of the main base (1) is connected with the upper platform of the ultra-large floating body module; one end of the sliding rod (2) is fixedly connected with a flange, the flange opening of the flange is concentric with the hole of the auxiliary base (3), and the other end of the sliding rod (2) is connected with the outer side notch of the upper platform of the ultra-large floating body module.
2. The device for passively slowing down the relative rotation of the ultra-large floating body according to claim 1, wherein: the guide rod (4) is a hollow cylinder or a solid cylinder made of steel materials.
3. The device for passively slowing down the relative rotation of the ultra-large floating body according to claim 1, wherein: the main base (1) and the auxiliary base (3) are both made of high-strength steel.
4. The device for passively slowing down the relative rotation of the ultra-large floating body according to claim 1, wherein: the slowing device is any one of a damper or a spring.
5. The device for passively slowing down the relative rotation of the ultra-large floating body according to claim 1, wherein: the torsion bar (5) comprises a cylinder body (505) with a cavity, a baffle plate (507) is arranged inside the cylinder body (505) and divides the cavity into two parts to form a first cavity and a second cavity, a first damper (506) is arranged in the first cavity, a second damper (508) is arranged in the second cavity, one end of a piston rod (501) extends into the first cavity and is connected with one side of the baffle plate (507), and the other end of the piston rod (501) is hinged with the main base (1) through a first spherical hinge (502); the cylinder body (505) is further connected with one end of a straight rod (503) at a position close to the second cavity, and the other end of the straight rod (503) is hinged with the auxiliary base (3) through a second spherical hinge (504).
6. The device for passively slowing down the relative rotation of the ultra-large floating body according to claim 5, wherein: one end of the cylinder body (505) connected with the straight rod (503) is closed, and the other end of the cylinder body (505) is provided with a hole for the piston rod (501) to penetrate through.
7. The device for passively slowing down the relative rotation of the ultra-large floating body according to claim 5, wherein: the first damper (506) and the second damper (508) are made of any one of a solid medium, a liquid medium, and a gas medium.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910158363.0A CN109774875B (en) | 2019-03-01 | 2019-03-01 | Device for passively slowing down relative rotation of ultra-large floating body |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910158363.0A CN109774875B (en) | 2019-03-01 | 2019-03-01 | Device for passively slowing down relative rotation of ultra-large floating body |
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| CN109774875A CN109774875A (en) | 2019-05-21 |
| CN109774875B true CN109774875B (en) | 2021-01-29 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110696983B (en) * | 2019-10-24 | 2021-09-28 | 河海大学 | Floating body connecting device |
| CN112013070A (en) * | 2020-08-28 | 2020-12-01 | 武汉理工大学 | Damping type connector of ultra-large floating body |
| CN113430911A (en) * | 2021-03-05 | 2021-09-24 | 中国舰船研究设计中心 | Large floating body flexible connecting bridge capable of inhibiting movement |
| CN114715342B (en) * | 2022-05-05 | 2023-08-29 | 中国华能集团清洁能源技术研究院有限公司 | Soft connection mechanism for floating body and offshore floating platform |
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| CN106275300A (en) * | 2016-08-12 | 2017-01-04 | 上海交通大学 | The attachment means of Very Large Floating Structure module based on rods |
| CN106335610A (en) * | 2016-08-12 | 2017-01-18 | 上海交通大学 | Connecting device for ultra-large type floating structure modules |
| CN104908896B (en) * | 2015-07-01 | 2017-03-01 | 中国船舶重工集团公司第七○二研究所 | A kind of Very large floating structure intermodule six degree of freedom adapter |
| CN206190791U (en) * | 2016-10-18 | 2017-05-24 | 武汉东九永环工程技术有限公司 | Rod -type solid particle friction damper |
| CN207683733U (en) * | 2017-12-27 | 2018-08-03 | 湖南大学 | A kind of active connector |
| CN208285241U (en) * | 2018-07-03 | 2018-12-25 | 贵州大秦光伏农业科技有限公司 | Photovoltaic generating system waterborne |
Family Cites Families (1)
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| US20030150368A1 (en) * | 2000-12-29 | 2003-08-14 | Arias Anthony M. | Underwater platforms supported by inflatable sacks |
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| CN104908896B (en) * | 2015-07-01 | 2017-03-01 | 中国船舶重工集团公司第七○二研究所 | A kind of Very large floating structure intermodule six degree of freedom adapter |
| CN106275300A (en) * | 2016-08-12 | 2017-01-04 | 上海交通大学 | The attachment means of Very Large Floating Structure module based on rods |
| CN106335610A (en) * | 2016-08-12 | 2017-01-18 | 上海交通大学 | Connecting device for ultra-large type floating structure modules |
| CN206190791U (en) * | 2016-10-18 | 2017-05-24 | 武汉东九永环工程技术有限公司 | Rod -type solid particle friction damper |
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