CN110641639A - Ocean platform vibration reduction energy feedback device based on nonlinear energy trap - Google Patents
Ocean platform vibration reduction energy feedback device based on nonlinear energy trap Download PDFInfo
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- CN110641639A CN110641639A CN201910918433.8A CN201910918433A CN110641639A CN 110641639 A CN110641639 A CN 110641639A CN 201910918433 A CN201910918433 A CN 201910918433A CN 110641639 A CN110641639 A CN 110641639A
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- 230000010355 oscillation Effects 0.000 claims abstract description 40
- 238000004804 winding Methods 0.000 claims description 12
- 238000013016 damping Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 6
- 230000004044 response Effects 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 abstract description 2
- 101100204059 Caenorhabditis elegans trap-2 gene Proteins 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 230000009471 action Effects 0.000 description 5
- 239000006096 absorbing agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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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
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
- F03B13/16—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2220/00—Application
- F05B2220/70—Application in combination with
- F05B2220/706—Application in combination with an electrical generator
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
A vibration reduction and energy feedback device of an ocean platform based on a nonlinear energy trap belongs to the field of deepwater ocean drilling platforms. The energy-saving device is composed of a platform, a transverse-longitudinal oscillation nonlinear energy trap and a vertical oscillation nonlinear energy trap. The heave nonlinear energy trap is arranged below the platform to reduce the heave of the platform; the transverse-longitudinal oscillation nonlinear energy trap and the vertical oscillation nonlinear energy trap are internally provided with structures such as a mass block, a spring, a straight shaft, a linear generator and the like, the linear generator is arranged between the mass block and the straight shaft, when the platform generates a motion response under a load, the spring drives the mass block to reciprocate on the straight shaft, and in the process, the linear generator between the mass block and the straight shaft converts vibration energy into electric energy, so that the electric energy for the platform is generated while the motion response of the ocean platform is reduced, and the full utilization of the energy is realized.
Description
Technical Field
The invention relates to an ocean platform vibration damping and energy feedback device based on a nonlinear energy trap, in particular to an ocean platform provided with the nonlinear energy trap which can generate electricity while damping vibration, and belongs to the field of deepwater ocean drilling platforms.
Background
With the development of oil and gas resources gradually moving to the ocean, ocean platforms are used as the most important basic equipment and are applied in large scale. The ocean platform works in a severe ocean environment and can generate six motion responses of rolling, pitching, yawing and heaving under the action of various loads such as wind, waves and currents. These movements can cause certain destruction to the building on the platform, influence the stability of equipment working process, reduce the life of platform, bring uncomfortable sense for the staff on the platform, influence staff's safety. Meanwhile, huge energy can be brought about by the movements, a vibration source and a main structure are isolated by a traditional vibration reduction method or a subsystem, or the energy is dissipated through damping carried by the vibration reduction method or the subsystem, so that the huge energy is not utilized while a better vibration reduction effect is not provided, and energy waste is caused.
Disclosure of Invention
Aiming at the defects, the invention provides an ocean platform vibration reduction and energy feedback device based on a nonlinear energy trap.
The invention is realized by the following technical scheme: a vibration reduction and energy feedback device of an ocean platform based on a nonlinear energy trap is composed of a platform, a transverse-longitudinal oscillation nonlinear energy trap and a vertical oscillation nonlinear energy trap, wherein the platform is composed of a deck, upright posts and a buoyancy tank, the deck is rigidly connected with the buoyancy tank below the deck through the upright posts, the transverse-longitudinal oscillation nonlinear energy trap is arranged between two adjacent upright posts below the deck, and the vertical oscillation nonlinear energy trap is arranged on two sides below the deck.
The transverse-longitudinal oscillation nonlinear energy trap consists of a mass block, a spring, a transverse-longitudinal oscillation nonlinear energy trap spring mounting plate, a linear generator, a straight shaft, a slide rail and a transverse-longitudinal oscillation nonlinear energy trap mounting plate, wherein the transverse-longitudinal oscillation nonlinear energy trap is mounted between two adjacent upright posts below a deck through the transverse-longitudinal oscillation nonlinear energy trap mounting plates at the left end and the right end, the upper and the lower transverse-longitudinal oscillation nonlinear energy trap spring mounting plates are respectively mounted below the deck and above a buoyancy tank, the two transverse-longitudinal oscillation nonlinear energy trap mounting plates at the two ends are connected with the straight shaft through four slide rails which are distributed in a square shape, the straight shaft is arranged at the central point of the square, the mass block is mounted between the two transverse-longitudinal oscillation nonlinear energy trap spring mounting plates, the slide rail and the straight shaft penetrate through the mass block, and the mass block can slide on the slide rails and the straight shaft to the left, two springs are respectively arranged above and below the mass block, the other end of each spring is connected with a transverse-longitudinal oscillation nonlinear energy trap spring mounting plate, and the linear generator is arranged on a straight shaft in the center of the inside of the mass block.
The heave nonlinear energy trap consists of a mass block, a spring, a linear generator, a straight shaft, a heave nonlinear energy trap mounting plate, connecting columns and a heave nonlinear energy trap spring mounting plate, wherein the heave nonlinear energy trap is mounted on two sides below a deck through the heave nonlinear energy trap mounting plate, the two sides below the heave nonlinear energy trap mounting plate are respectively connected with the two connecting columns, the straight shaft is mounted in the center, the lower ends of the connecting columns on the two sides are respectively connected with the heave nonlinear energy trap spring mounting plate, the mass block is arranged between the two heave nonlinear energy trap spring mounting plates, and the straight shaft penetrates through the center of the mass block, the mass block can slide up and down on the straight shaft, four springs are respectively arranged on the left side and the right side of the mass block, the other ends of the springs are connected with the heave nonlinear energy trap spring mounting plate, and the linear generator is arranged on the straight shaft in the center of the inside of the mass block.
The linear generator is composed of an air gap, a stator iron core, windings, rotor magnetic poles and permanent magnets, wherein the stator iron core is embedded in the mass block and slides on a straight shaft together with the mass block, the windings are installed in installation grooves which are arranged on the stator iron core at intervals, the permanent magnets are installed on the straight shaft, the rotor magnetic poles are distributed on the outer sides of the permanent magnets at intervals, the air gap is directly reserved between every two adjacent rotor magnetic poles, and the outer sides of the rotor magnetic poles are in contact with the stator iron core and the windings.
The invention has the advantages that when the ocean platform of the invention is subjected to various loads such as wind, wave, flow and the like to generate motion responses such as swaying, surging, heaving and the like in the working process of deep sea, the mass block in the dynamic vibration absorber attached to the platform can generate corresponding reciprocating motion along with the motion response of the platform in various directions, the reciprocating motion can be reversely acted on the platform to reduce the motion of the platform, and the energy generated by the motion of the platform is absorbed on the self device, the traditional linear vibration absorber only has the vibration attenuation effect in a very small frequency band near the natural frequency, the natural frequency can be changed along with the change of the frequency of the load, the vibration attenuation performance can be greatly reduced, the nonlinearity in the nonlinear energy trap can ensure that the internal resonance can be generated with the platform, and the good vibration inhibition capability can be achieved in a wider frequency band, meanwhile, the nonlinear energy trap can completely transfer the energy generated by the platform motion to the self device through target energy transfer. The energy which is originally dissipated by the damping in the nonlinear energy trap can be converted into electric energy through the generator, and the generated electric energy can be used by the platform. The device can generate electric energy while reducing the response of the platform to the maximum extent of the platform to sway, surging and heaving, thereby realizing the full utilization of resources.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a structure of a transverse-longitudinal oscillation nonlinear energy trap;
FIG. 3 is a schematic diagram of a configuration of a heave nonlinear energy trap;
FIG. 4 is a sectional view of a linear generator structure and its installation position;
FIG. 5 is a front view of a heave nonlinear energy trap installation location;
FIG. 6 is a side view of a heave nonlinear energy trap installation location;
in the figure, 1, a platform, 101, a deck, 102, a column, 103, a buoyancy tank, 2, a horizontal-vertical oscillation nonlinear energy trap, 201, a horizontal-vertical oscillation nonlinear energy trap spring mounting plate, 202, a horizontal-vertical oscillation nonlinear energy trap mounting plate, 203, a slide rail, 3, a vertical oscillation nonlinear energy trap, 301, a vertical oscillation nonlinear energy trap mounting plate, 302, a connecting column, 303, a vertical oscillation nonlinear energy trap spring mounting plate, 4, a straight shaft, 5, a linear generator, 501, an air gap, 502, a stator core, 503, a winding, 504, a rotor magnetic pole, 505, a permanent magnet, 6, a mass block, 7 and a spring.
Detailed Description
A vibration reduction and energy feedback device of an ocean platform based on a nonlinear energy trap is composed of a platform 1, a horizontal-vertical oscillation nonlinear energy trap 2 and a vertical oscillation nonlinear energy trap 3, wherein the platform 1 is composed of a deck 101, a vertical column 102 and a buoyancy tank 103, the deck 101 is rigidly connected with the buoyancy tank 103 below through the vertical column 102, the horizontal-vertical oscillation nonlinear energy trap 2 is installed between two adjacent vertical columns 102 below the deck 101, and the vertical oscillation nonlinear energy trap 3 is installed on two sides below the deck 101.
The transverse-longitudinal oscillation nonlinear energy trap 2 consists of a mass block 6, a spring 7, a transverse-longitudinal oscillation nonlinear energy trap spring mounting plate 201, a linear generator 5, a straight shaft 4, a slide rail 203 and a transverse-longitudinal oscillation nonlinear energy trap mounting plate 202, the transverse-longitudinal oscillation nonlinear energy trap 2 is arranged between two adjacent upright posts 102 below a deck 101 through the transverse-longitudinal oscillation nonlinear energy trap mounting plates 202 at the left end and the right end, the upper and the lower transverse-longitudinal oscillation nonlinear energy trap spring mounting plates 201 are respectively arranged below the deck 101 and above a buoyancy tank 103, the two transverse-longitudinal oscillation nonlinear energy trap mounting plates 202 at the two ends are connected with one straight shaft 4 through four square distributed slide rails 203, the straight shaft 4 is arranged at the central point of a square, the mass block 6 is arranged between the two transverse-longitudinal oscillation nonlinear energy trap spring mounting plates 201, the slide rail 203 and the straight shaft 4 penetrate through the mass block 6, the mass block 6 can slide left and right on the slide rail 203 and the straight shaft 4, two springs 7 are respectively installed above and below the mass block 6, the other end of each spring 7 is connected with the transverse-longitudinal oscillation nonlinear energy trap spring mounting plate 201, and the linear generator 5 is installed on the straight shaft 4 in the center inside the mass block 6.
The heave nonlinear energy trap 3 is composed of a mass block 6, springs 7, a linear generator 5, a straight shaft 4, a heave nonlinear energy trap mounting plate 301, connecting columns 302 and a heave nonlinear energy trap spring mounting plate 303, the heave nonlinear energy trap 3 is mounted on two sides below a deck 101 through the heave nonlinear energy trap mounting plate 301, two connecting columns 302 are respectively connected on two sides below the heave nonlinear energy trap mounting plate 301, the straight shaft 4 is mounted in the center, the lower ends of the connecting columns 302 on two sides are respectively connected with the heave nonlinear energy trap spring mounting plate 303, the mass block 6 is arranged between the two heave nonlinear energy trap spring mounting plates 303, the straight shaft 4 penetrates through the center of the mass block 6, the mass block 6 can slide up and down on the straight shaft 4, four springs 7 are respectively mounted on the left side and the right side of the mass block 6, the other end of each spring 7 is connected with the heave nonlinear energy trap spring mounting plate 301, the linear generator 5 is mounted on a straight shaft 4 centrally inside the mass 6.
The linear generator 5 is composed of an air gap 501, a stator core 502, a winding 503, rotor magnetic poles 504 and permanent magnets 505, wherein the stator core 502 is embedded inside the mass block 6 and slides on the straight shaft 4 together with the mass block 6, the winding 503 is installed in installation grooves which are arranged on the stator core 502 at intervals, the permanent magnets 505 are installed on the straight shaft 4, the rotor magnetic poles 504 are distributed on the outer side of the permanent magnets 505 at intervals, the air gap 501 is directly reserved between two adjacent rotor magnetic poles 504, and the outer side of each rotor magnetic pole 504 is in contact with the stator core 502 and the winding 505.
When the device is subjected to the action of wind or current in offshore work, the ocean platform 1 generates swaying and surging responses, the mass blocks 6 in the four swaying-surging nonlinear energy traps 2 arranged between the upright posts 102 of the platform 1 generate reciprocating motion under the action of the springs 7, and the mass blocks 6 cannot generate longitudinal displacement and only can transversely slide on the slide rails 203 through the support of the four slide rails 203. When the mass 6 transversely reciprocates along the slide rails 203, the springs 7 arranged above and below the mass 6 extend along with the movement of the mass 6, the stretching direction of the springs 7 is inclined, so that the restoring force of the springs 7 acting on the mass 6 is nonlinear, the acting force generated by the reciprocating motion of the mass 6 counteracts the platform 1 and offsets the swaying and surging response generated by the platform 1, and the swaying and surging response of the platform 1 can be reduced, namely, the motion energy of the platform 1 is transferred into the swaying-surging nonlinear energy trap 2. The mass 6 reciprocates along the slide rail 203 and also reciprocates along the straight shaft 4, at this time, a stator core 502 installed in the mass 6 and a mover pole 504 installed on the straight shaft 4 generate relative motion, and a winding 503 arranged in a slot of the stator core 502 cuts a magnetic induction line, so that electric energy is generated.
When the device is subjected to the action of waves during offshore operation, the platform 1 generates heave response, the mass blocks 6 in the heave nonlinear energy trap 3 arranged below the deck 101 of the platform 1 reciprocate along the straight shaft 4 in the vertical direction under the action of the springs 7, the mass blocks 6 cannot generate displacement in the horizontal direction through the limit of the straight shaft 4, the springs 7 arranged on the left side and the right side of the mass blocks 6 can extend along with the movement of the mass blocks 6 while the mass blocks 6 move in the vertical direction, the force of the springs 7 acting on the mass blocks 6 is nonlinear due to the fact that the stretched directions of the springs 7 are inclined, the principle of vibration reduction and power generation of the heave nonlinear energy trap 2 is the same as that of vibration reduction and power generation of the heave nonlinear energy trap 2, the mass blocks 6 of the heave nonlinear energy trap 3 react on the platform during the reciprocating motion to reduce the heave of the platform 1, the stator iron core 502 arranged in the mass blocks 6 and the mover magnetic pole 504 arranged on the straight shaft 4 generate relative motion, the windings 503 in the slots of the stator core 502 cut the magnetic induction lines, thereby generating electric power.
It will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in the embodiments described above without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims.
Claims (4)
1. The utility model provides an ocean platform damping is presented can device based on nonlinear energy trap, is constituteed by ocean platform, violently-surging nonlinear energy trap and heaving nonlinear energy trap, its characterized in that: the ocean platform consists of a deck, upright posts and buoyancy tanks, wherein the deck is rigidly connected with the buoyancy tanks below through the upright posts, the horizontal-vertical oscillation nonlinear energy traps are arranged between two adjacent upright posts below the deck, and the vertical oscillation nonlinear energy traps are arranged on two sides below the deck.
2. The offshore platform vibration damping and energy feedback device based on the nonlinear energy trap as claimed in claim 1, wherein the traverse-surging nonlinear energy trap is composed of a mass block, a spring, a traverse-surging nonlinear energy trap spring mounting plate, a linear generator, a straight shaft, a slide rail and a traverse-surging nonlinear energy trap mounting plate, the traverse-surging nonlinear energy trap is mounted between two adjacent columns below the deck through the traverse-surging nonlinear energy trap mounting plates at the left and right ends, the upper and lower two traverse-surging nonlinear energy trap spring mounting plates are respectively mounted below the deck and above the buoyancy tank, the two traverse-surging nonlinear energy trap mounting plates at the two ends are connected with one straight shaft through four slide rails distributed in a square shape, the straight shaft is at the central point of the square shape, the mass block is mounted between the two traverse-surging nonlinear energy trap spring mounting plates, the sliding rail and the straight shaft penetrate through the mass block, the mass block can slide left and right on the sliding rail and the straight shaft, two springs are respectively arranged above and below the mass block, the other ends of the springs are connected with the transverse-longitudinal oscillation nonlinear energy trap spring mounting plate, and the linear generator is arranged on the straight shaft in the center of the inside of the mass block.
3. The offshore platform damping and energy-feeding device based on the nonlinear energy trap as claimed in claim 1, wherein the heave nonlinear energy trap is composed of a mass block, springs, a linear generator, a straight shaft, a heave nonlinear energy trap mounting plate, a connecting column and a heave nonlinear energy trap spring mounting plate, the heave nonlinear energy trap is mounted on two sides below the deck through the heave nonlinear energy trap mounting plate, two connecting columns are respectively connected on two sides below the heave nonlinear energy trap mounting plate, a straight shaft is mounted in the center, a heave nonlinear energy trap spring mounting plate is respectively connected at the lower ends of the connecting columns on two sides, the mass block is arranged between the two heave nonlinear energy trap spring mounting plates, the straight shaft passes through the center of the mass block, the mass block can slide up and down on the straight shaft, four springs are respectively mounted on the left side and the right side of the mass block, the other end of the spring is connected with a spring mounting plate of the heave nonlinear energy trap, and the linear generator is mounted on a straight shaft in the center of the mass block.
4. The offshore platform vibration damping and energy feedback device based on the nonlinear energy trap as claimed in claim 2, wherein the linear generator is composed of an air gap, a stator core, a winding, rotor magnetic poles and permanent magnets, the stator core is embedded in the mass block and slides on a straight shaft together with the mass block, the winding is installed in installation grooves arranged at intervals on the stator core, the permanent magnets are installed on the straight shaft, the rotor magnetic poles are distributed at intervals on the outer side of the permanent magnets, the air gap is directly reserved between two adjacent rotor magnetic poles, and the outer side of each rotor magnetic pole is in contact with the stator core and the winding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910918433.8A CN110641639A (en) | 2019-09-26 | 2019-09-26 | Ocean platform vibration reduction energy feedback device based on nonlinear energy trap |
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| CN201910918433.8A CN110641639A (en) | 2019-09-26 | 2019-09-26 | Ocean platform vibration reduction energy feedback device based on nonlinear energy trap |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111424832A (en) * | 2020-03-23 | 2020-07-17 | 广州大学 | Tuned mass damper with adjustable nonlinear energy trap and inertial volume |
| CN112776946A (en) * | 2020-12-31 | 2021-05-11 | 中国科学院合肥物质科学研究院 | Shock absorption anti-interference device, buoy with same and shock absorption method |
| CN112810769A (en) * | 2021-03-02 | 2021-05-18 | 上海交通大学 | Active motion suppression device and method for offshore floating type scientific research platform |
| CN113280074A (en) * | 2021-05-10 | 2021-08-20 | 东南大学 | Multi-stable magnetic coupling nonlinear energy trap device and multi-stable magnetic coupling method |
| CN114620194A (en) * | 2022-02-16 | 2022-06-14 | 中国海洋大学 | Multi-step motion compensation connection method between multiple bodies of offshore floating type photovoltaic system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN112810769A (en) * | 2021-03-02 | 2021-05-18 | 上海交通大学 | Active motion suppression device and method for offshore floating type scientific research platform |
| CN113280074A (en) * | 2021-05-10 | 2021-08-20 | 东南大学 | Multi-stable magnetic coupling nonlinear energy trap device and multi-stable magnetic coupling method |
| CN113280074B (en) * | 2021-05-10 | 2022-03-11 | 东南大学 | Multi-stable magnetic coupling nonlinear energy trap device and multi-stable magnetic coupling method |
| CN114620194A (en) * | 2022-02-16 | 2022-06-14 | 中国海洋大学 | Multi-step motion compensation connection method between multiple bodies of offshore floating type photovoltaic system |
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