CN114411794A - Bionic wave vortex breaking structure and construction method thereof - Google Patents
Bionic wave vortex breaking structure and construction method thereof Download PDFInfo
- Publication number
- CN114411794A CN114411794A CN202111634069.6A CN202111634069A CN114411794A CN 114411794 A CN114411794 A CN 114411794A CN 202111634069 A CN202111634069 A CN 202111634069A CN 114411794 A CN114411794 A CN 114411794A
- Authority
- CN
- China
- Prior art keywords
- wave
- monomer
- wave monomer
- target protection
- structures
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011664 nicotinic acid Substances 0.000 title claims abstract description 60
- 238000010276 construction Methods 0.000 title claims abstract description 19
- 239000000178 monomer Substances 0.000 claims abstract description 190
- 230000002093 peripheral effect Effects 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 230000001681 protective effect Effects 0.000 claims description 23
- 238000000926 separation method Methods 0.000 claims description 19
- 230000007704 transition Effects 0.000 claims description 19
- 239000004746 geotextile Substances 0.000 claims description 7
- 238000009958 sewing Methods 0.000 claims description 7
- 238000007667 floating Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 230000004323 axial length Effects 0.000 claims description 3
- 238000005429 filling process Methods 0.000 claims description 3
- 238000009417 prefabrication Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000009991 scouring Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 11
- 230000009471 action Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 5
- 230000035939 shock Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000004931 aggregating effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
- E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
Abstract
The invention discloses a bionic wave vortex breaking structure which comprises a plurality of wave monomer structures; the wave monomer structures are alternately arranged and distributed along the circumferential direction of the peripheral outer wall of the target protection structure; the upper edge of the wave monomer structure at the top of each wave monomer structure is fixedly connected with the upper edge of the target protection structure; the lower edge of the wave monomer structure at the bottom of each wave monomer structure is fixedly connected with the lower edge of the target protection structure; each wave monomer structure comprises a plurality of wave monomer units, and the plurality of wave monomer units are distributed along the axial direction of the target protection structure; the two side edges of each wave monomer structure are distributed on the outer side wall of the target protection structure in a sine curve shape. The invention also discloses a construction method of the bionic wave vortex breaking structure. According to the invention, by adopting a bionic wave vortex breaking mode, the vortex-induced vibration phenomenon and the local scouring depth of the foundation structure can be reduced, and the reliability and the adaptability of the foundation structure in a severe ocean environment are improved.
Description
Technical Field
The invention relates to the technical field of offshore wind power, in particular to a bionic wave vortex breaking structure and a construction method thereof.
Background
With the continuous expansion of the installed quantity of the wind generating sets, the capacity of a single machine is continuously increased, the water depth suitable for the offshore wind power foundation structure form is continuously moved from an offshore shallow water area to a far-sea deep water area, and higher requirements are provided for the adaptability and the reliability of the foundation of the wind generating set.
Whether the pile foundation and the cylindrical foundation are suitable for shallow water, or the jacket foundation and the floating foundation are suitable for medium and high water depths, the foundation structure or the attached structure (mooring cable) of the foundation structure can generate vortex under the influence of the marine hydrodynamic environment. When the Reynolds number reaches a certain value, the back flow surface of the basic structure has Karman vortex streets which are arranged in an anti-symmetric cross way, and the back flow surface of the basic structure periodically falls off along with the development of time. When the natural vibration frequency of the base structure and the auxiliary structures thereof in the fluid is close to the transverse action pressure frequency, severe resonance phenomenon can occur, vortex-induced vibration is generated, the fatigue life of the structure is shortened, the structure is damaged, and the safety of the whole project is endangered finally.
In addition, the vortex is also an important factor for generating local scouring of silt close to the bed surface, when the starting flow velocity generated by the vortex is greater than the impending starting flow velocity of the silt, silt particles on the seabed can be suspended, pushed and partially settled under the action of various vortex forms, and finally a scouring pit is formed by hollowing out the sea bed surface, so that the integral bearing capacity of the foundation is reduced, and the tilting and failure damage of the structure are caused.
At present, research on vortex breaking and damping facilities is concentrated on land structures such as land bridge slings and fan tower drums, the vortex breaking effect of vortex flow with different incoming flow angles is poor, and the problem of vortex-induced scouring in the offshore field cannot be solved.
Therefore, there is an urgent need to develop a technology capable of solving the above technical problems.
Disclosure of Invention
The invention aims to provide a bionic wave vortex breaking structure and a construction method thereof aiming at the technical defects in the prior art.
Therefore, the invention provides a bionic wave vortex breaking structure which comprises a plurality of wave monomer structures;
the wave monomer structures are alternately arranged and distributed along the circumferential direction of the peripheral outer wall of the target protection structure;
the upper edge of the wave monomer structure arranged at the top of each wave monomer structure is fixedly connected with the upper edge of the target protection structure;
the lower edge of the wave monomer structure at the bottom of each wave monomer structure is fixedly connected with the lower edge of the target protection structure;
each wave monomer structure comprises a plurality of wave monomer units which are connected with one another, the wave monomer units are distributed on the side wall of the target protection structure along the axial direction of the target protection structure, and any two adjacent wave monomer units are distributed in an up-down symmetrical mode;
the two side edges of each wave monomer structure are distributed on the outer side wall of the target protection structure in a sine curve shape;
the wavelength lambda and the amplitude omega of the sine curve are determined according to the length L and the diameter D of the target protection structure respectively;
the wavelength lambda of the sine curve is not more than L/2;
the amplitude omega of the sine curve is larger than D/10 and smaller than D/5;
any two adjacent wavy monomer structures have a phase difference of lambda/2.
In addition, the invention also provides a construction method of the bionic wave vortex breaking structure, which comprises the following steps:
the axial length of each wave monomer structure is equal to that of the target protection structure;
wherein, an opening is reserved on the upper edge of the wave monomer structure on the top of each wave monomer structure;
and 4, inflating and forming: transporting the target protection structure of the sewed wave monomer structure to a specified target installation site in a floating manner, then inflating the interior of the wave monomer structure through an opening on each wave monomer structure, and enabling the air to flow through an air flow channel, so that all wave monomer units included in each wave monomer structure are inflated and extended to form a space curved surface shape;
and 5, filling and forming: filling concrete mixed in advance in a dry place into the wave monomer structures along the airflow channel after the concrete passes through the openings, circularly performing concrete filling operation on the wave monomer structures for multiple times in the filling process to ensure that slurry is fully extended until the filling surface of the concrete rises to the upper edge of the target protection structure, and then plugging the openings, so that the construction of the bionic wave vortex breaking structure is completed;
concrete filling operation is carried out each time, specifically; and filling concrete with preset volume into the plurality of wave monomer structures one by one along the circumferential direction of the target protection structure.
Compared with the prior art, the bionic wave vortex breaking structure and the construction method thereof have scientific design, can reduce the vortex-induced vibration phenomenon and the local scouring depth of the foundation structure by the bionic wave vortex breaking mode on the premise of economic feasibility and construction convenience, improve the reliability and the adaptability of the foundation structure in the severe ocean environment and have great practical significance.
The technical scheme of the invention is a novel offshore wind power streaming vortex breaking structure which is applicable to the field of oceans, is not influenced by incoming flow angles, and has obvious vortex breaking, impact reducing and damping effects and a construction method thereof. The invention is a necessary choice and a new way to improve the adaptability and the reliability of the offshore wind power foundation in the severe ocean environment.
Compared with the prior art, the bionic wave vortex breaking structure provided by the invention is scientific in structural design, low in material cost, easy to obtain, capable of being prefabricated, directly installed on site, easy to construct and convenient to disassemble, assemble, replace and maintain. When the ocean current comes, the separation, transition and vortex breaking effects can be effectively exerted, so that the flow velocity around the target protection structure is reduced, the alternative vortex shedding is reduced, the foundation soil retention is enhanced, the problems of vortex-induced vibration and foundation soil movement under the action of the ocean current for a long time are solved, the vortex can be reasonably broken, the shock absorption is realized, the speed is limited, the soil is fixed, and the scouring on the foundation is reduced.
Drawings
FIG. 1a is an isometric schematic view of a vortex breaking structure of a bionic wave provided by the invention;
fig. 1b is a schematic perspective view of a target protection structure to be protected in fig. 1a, in a bionic wave vortex breaking structure provided by the present invention;
FIG. 1c is a schematic perspective view of a local area of a vortex breaking structure for a bionic wave according to the present invention;
FIG. 2a is a schematic partial plan view of a plurality of bionic wave monomer structures in a bionic wave vortex breaking structure provided by the present invention;
fig. 2b is a schematic view of a separation area in an adjacent wave monomer structure in a bionic wave vortex breaking structure provided by the present invention, illustrating a flow direction of water flow after breaking;
FIG. 2c is a schematic diagram of a bionic wave vortex breaking structure according to the present invention, and the position of the relevant diameter parameter on the target protection structure;
FIG. 3 is a schematic diagram of region division of a plurality of bionic wave monomer structures in a bionic wave vortex breaking structure provided by the present invention;
FIG. 4 is a schematic view of a plurality of bionic wave monomer structures being sewn together in a bionic wave vortex breaking structure provided by the present invention;
fig. 5 is a schematic drawing illustrating stretching and forming of a plurality of bionic wave monomer structures in a bionic wave vortex breaking structure provided by the invention;
FIG. 6 is a schematic view of filling and forming a plurality of bionic wave monomer structures in a bionic wave vortex breaking structure provided by the present invention;
fig. 7 is a vortex breaking effect diagram of the bionic wave vortex breaking structure provided by the invention, which is a vortex effect diagram obtained by performing sea state actual simulation calculation through a fluid simulation technology of finite element simulation ANSYS software and performing vortex volume rendering;
FIG. 8 is a vorticity diagram of an unprotected equivalent-sized structure of the prior art, which is a vorticity effect diagram obtained by performing sea state actual simulation calculation and vorticity rendering on a fluid simulation technology of finite element simulation ANSYS software under the same sea state condition;
in the figure, 1 is a target protection structure, 2 is a wave monomer structure, 3 is a wave monomer unit, and 4 is a common end;
7 is a separation zone, 8 is a transition zone, 9 is a vortex breaking zone, and 10 is a dividing block;
12 is a sine curve, 13 is an airflow channel, 14 is the lower edge of a wave monomer structure, and 15 is the lower edge of a target protection structure;
16 is the upper edge of the wave monomer structure, 17 is the upper edge of the target protective structure, 18 is concrete, 19 is a filling surface, and 20 is an opening.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1a to 8, the invention provides a bionic wave vortex breaking structure, which is used for vortex breaking and shock absorption of a single pile foundation, a jacket foundation and a floating foundation mooring cable and other ocean engineering structures under the action of ocean currents for a long time.
The bionic wave vortex breaking structure is arranged on a vertically distributed cylindrical target protection structure 1 and specifically comprises a plurality of wave monomer structures 2;
the wave monomer structures 2 are alternately arranged and distributed along the circumferential direction of the peripheral outer wall of the target protection structure 1;
the top of each wave monomer structure 2 is provided with a wave monomer structure upper edge 16 which is fixedly connected with a target protection structure upper edge 17;
the lower edge 14 of the wave monomer structure at the bottom of each wave monomer structure 2 is fixedly connected with the lower edge 15 of the target protection structure;
each wave monomer structure 2 comprises a plurality of wave monomer units 3 which are connected with each other, the wave monomer units 3 are distributed on the side wall of the target protection structure 1 along the axial direction of the target protection structure 1, any two adjacent wave monomer units 3 are distributed in an up-down symmetrical mode, and the symmetrical connection positions of any two adjacent wave monomer units 3 form a common end 4;
it should be noted that a plurality of wave monomer units 3 are integrated by a plurality of common ends 4 to form a wave monomer structure 2 distributed along the axial direction of the target protective structure 1.
In the invention, in particular, two side edges of each wave monomer structure 2 are distributed on the outer side wall of the target protection structure 1 in the shape of a sine curve 12;
the wavelength λ and amplitude ω of the sinusoidal curve depend on the length L and diameter D of the target protective structure 1 to be protected;
the wavelength λ of the sinusoid 12 is not greater than (i.e., less than or equal to) L/2; the amplitude omega of the sine curve 12 is larger than D/10 and smaller than D/5, and the specific size can be determined according to actual needs.
In the invention, in the concrete implementation, any two adjacent wave monomer structures 2 have a phase difference of lambda/2.
In the invention, in a concrete implementation, for each wave monomer structure 2, a section of water flow treatment area is arranged on any two adjacent wave monomer units 3 which are distributed up and down;
the water flow treatment area comprises a separation area 7, a transition area 8 and a vortex breaking area 9 which are sequentially connected from top to bottom;
wherein, the separation zone 7 is positioned in the upper unit of the two wave monomer units 3 and is higher than the peak position of 3/4 amplitude of the sinusoidal curve 12;
a transition region 8, located in the upper one of the two wave monomer units 3, at a transition position lower than 3/4 amplitude of the sinusoidal curve 12 and higher than 1/4 amplitude of the sinusoidal curve 12;
the vortex breaking zone 9 is located in the opposite connection area of the two wave monomer units 3 and is lower than the depression part of 1/4 amplitude of the sine curve 12.
It should be noted that, in the present invention, the position of the separation zone 7 is selected as follows: the convex part of the three-dimensional curved surface structure is utilized, so that the incoming flow can be quickly separated to form the branch water flow, and the branch water flow is defined by the inventor in advance.
In the present invention, the position of the transition region 8 is selected as follows: the smooth part of the three-dimensional curved surface structure is utilized to enable branch water flow to be gathered, accumulated and smoothly transited so as to be paved for entering a vortex breaking area (whether the branch water flow is corrected to an energy dissipation area or not), and the branch water flow is defined by the inventor in advance.
In the present invention, the position of the vortex breaking region 9 is selected according to the following principle: the sunken part of the three-dimensional curved surface structure is utilized, so that the branch water flow can be mixed, collided and dissipated, and the purposes of vortex breaking and energy dissipation are achieved.
It should be noted that, in the present invention, the separation zone 7 is used for breaking the water flow, so that the broken incoming flow flows to the transition zone 8 in four directions (as shown by four arrows in fig. 2 b); the transition zone 8 is used for transiting and condensing water flow, so that the crushed water flow is condensed and flows to the vortex breaking zone 9 in an aggregating way; and the vortex breaking area 9 is used for mixing and colliding the water flows gathered in four directions so as to perform centralized energy dissipation.
It should be noted that, when no protective structure is applied, the incoming flow is channeled to both sides of the structure (i.e., the target protective structure 1) along the smooth curved surface of the target protective structure 1, and vortices that fall off alternately are easily generated under certain hydraulic conditions, and at this time, the separation point of the incoming flow and the structure is located on the surface of the target protective structure. When the bionic wave vortex breaking structure provided by the invention is applied, incoming flow is firstly disturbed by the convex part (namely the separation area 7) of the three-dimensional turbulence structure, and the separation point of the incoming flow is changed to the peak of the separation area 7. Because the adjacent three-dimensional curved surface structures have a half-wavelength difference, the water flow is broken towards four directions.
In the present invention, the transition region 8 is the longest part (occupying 50%) of the wave monomer unit 3, and functions to receive the broken water flow of the separation region 7 and accumulate the energy to the vortex breaking region 9. Because the water flow has the characteristic of being easily restricted by the boundary, the transition region with a longer distance is adopted, and the function of leading the water flow to enter the vortex breaking region can be well achieved.
In the present invention, the vortex breaking region 9 is a depressed area of the wave monomer structure, where the water flow is easily gathered. The wave monomer structures are separated, transited, broken vortex and energy-dissipating by the adjacent wave monomer structures, and the process is circulated until the wave monomer structures leave the surface of the broken vortex structure.
It should be noted that, in the present invention, the plurality of wave monomer structures 2 are alternately arranged along the circumferential direction of the peripheral outer wall of the target protection structure 1, so that the water flow repeats the separation, transition and vortex breaking processes when passing through, thereby playing a role in amplifying the functions of the separation zone 7, the transition zone 8 and the vortex breaking zone 9 on the two adjacent wave monomer units 3.
In the present invention, in particular, for the wave-shaped single-body structure 2, the two side edges thereof are distributed in the shape of a sine curve 12;
when the bionic wave vortex breaking structure comprises n wave monomer structures 2, wherein n is an even number, and the outer contour diameter of each wave monomer structure 2 is designed according to the following formula:
d +2 ω cos (2 π y/λ), equation (1);
d even — D +2 ω cos (2 π y/λ + λ/2), equation (2);
in the above formula, DMagic card、DDollThe outer contour diameter of a bionic wave vortex breaking structure (particularly a wave monomer structure 2); in the invention, n wave monomer structures 2 are sequentially ordered and marked in advance (for example, clockwise or anticlockwise, any wave monomer structure 2 is selected as a 0 th wave monomer structure), and even number wave monomer structures (for example, 2 nd, 4 th, etc.) and odd number wave monomer structures (for example, 1 st, 3 rd, 5 th, etc.) are obtained by definition; wherein D isMagic card、DDollThe outer contour diameters of the odd-numbered wavy monomer structures and the even-numbered wavy monomer structures are shown in fig. 2 c.
The diameter D of the target protective structure 1 can be obtained directly by measurement of the target protective structure 1;
ω is the amplitude of the plane curve (i.e., the sinusoid 12); λ is the wavelength of the plane curve (i.e. the sine curve 12), and n is the number of the wave monomer structures 2 uniformly arranged along the circumferential direction of the peripheral outer wall of the target protective structure 1, and is required to be an even number. y is the height (distance in the direction of stretching extension) in the height direction.
In the invention, the formula (1) and the formula (2) mainly aim at calculating the local outer contour diameter of the bionic wave vortex breaking structure (particularly the wave single body structure 2 at different positions such as odd number positions, even number positions and the like) through y (height in the height direction).
DMagic card、DDollThe outer contour diameter of the bionic wave vortex breaking structure (particularly the wave monomer structures 2 at different positions such as odd number position, even number position and the like) provided by the invention has the advantages that in order to increase the vortex breaking effect, the difference between the adjacent wave monomer structures 2 is half wavelength to dredgeThe water guide flow circulation is disturbed by the curved surface structure with the fluctuating height.
It should be noted that the bionic wave vortex breaking structure (specifically, the wave monomer structure 2) provided by the invention is a three-dimensional curved surface structure, and the diameter of the outer contour of the bionic wave vortex breaking structure is changed continuously in space along with the increase of the height of the target protection structure 1. Therefore, the local diameter corresponding to a certain height y of the outer contour can be calculated by the above formula (1) and formula (2).
In the present invention, DmaxAnd DminThe maximum diameter and the minimum diameter of the outer contour of the bionic wave vortex breaking structure (particularly the wave monomer structure 2) are respectively. Can be calculated by the formula (1) and the formula (2). y is the elevation in the height direction (distance in the direction of stretching extension).
In the invention, the plane curve is the projection of a three-dimensional curved surface representing the wave bionic vortex breaking structure on a two-dimensional plane. The function is as follows: the distinct amplitude ω is the amplitude of the plane curve (i.e., the sinusoidal curve 12); λ is the wavelength of the plane curve (i.e. the sine curve 12), and n is the number of the wave monomer structures 2 uniformly arranged along the circumferential direction of the peripheral outer wall of the target protective structure 1.
In the present invention, the planar curves (i.e., the sinusoidal curves 12) on the plurality of wavy individual structures 2 are spatially arrayed (i.e., arranged) circumferentially on the outer wall of the periphery of the target protective structure 1 to form a spatially curved surface. In the array process, the phase difference between the adjacent curved surfaces (two adjacent wave monomer structures 2) is alternately arranged by lambda/2, and then three-dimensional sweeping is carried out to form the curved surface of the space wave column.
In order to obtain the bionic wave vortex breaking structure provided by the invention, the invention also provides a construction method of the bionic wave vortex breaking structure, which specifically comprises the following steps:
the axial length of each wave monomer structure 2 is equal to that of the target protection structure 1;
wherein, the wavelength λ of the sinusoidal curve 12 is determined according to the length L of the target protection structure 1 to be protected; the wavelength λ of the sinusoid 12 is not greater than (i.e., less than or equal to) L/2;
the amplitude ω of the sinusoidal curve 12, depending on the diameter D of the target protective structure 1 to be protected; the amplitude omega of the sine curve 12 is larger than D/10, and the specific size can be determined according to actual needs.
In step 1, in particular, the geotextile preferably adopts high-toughness geotextile which is oxidation-resistant, corrosion-resistant and waterproof.
it should be noted that, in step 2, before arranging the plurality of wave-shaped monomer structures 2, a region dividing operation may be performed in advance, specifically as follows:
a plurality of dividing blocks 10 (for example, 16 to 26) are uniformly divided along the circumferential direction on the peripheral outer wall of the cylindrical target protection structure 1, and any two adjacent dividing blocks 10 have a phase difference of lambda/2;
after the zone division is performed, the wave-shaped monomer structures 2 are respectively arranged at the position of each divided zone 10.
In a specific implementation, for the plurality of division blocks 10, one of the division blocks may be predetermined as the 1 st division block from which the division block starts, and then the plurality of division blocks 10 are respectively sorted and marked in sequence (for example, clockwise or counterclockwise sequence), so as to obtain the even-numbered bit blocks (for example, the 2 nd bit, the 4 th bit, etc.) and the odd-numbered bit blocks 9 (for example, the 1 st bit, the 3 rd bit, the 5 th bit, etc.) therein, that is, the division marking of the parity bits may be implemented.
it should be noted that the target protection structure 1 is a hollow steel pile structure, the inside of which is hollow and has a steel pipe structure with a certain thickness. Firstly, sewing holes are reserved on the surface of the target protection structure 1 in advance, binding bands are sewn on the lower edge 14 of the wave monomer structure in advance, and then the high-toughness corrosion-resistant binding bands penetrate through the holes in the target protection structure 1 and are bound and fixed with geotextile binding bands on the lower edge 14 of the wave monomer structure.
It should be noted that, in the present invention, the whole of the wave-shaped monolithic structure 2 from top to bottom is sewn and fixed with the target protective structure 1 (on which a hole for passing through the binding band is reserved).
Wherein, an opening 20 is reserved on the upper edge 1 of the wave monomer structure on the top of each wave monomer structure 2;
it should be noted that each wave-shaped single-body structure 2 only has an opening 20 at the upper end, and the other parts are all sealing structures, and when the opening 20 is blocked, an integral sealing structure is formed.
In step 3, in particular implementation, the opening 20 has a diameter depending on the size of the target shielding structure 1.
And 4, inflating and forming: transporting the target protection structure 1 with the sewn wave monomer structures 2 to a specified target installation site in a floating manner, then inflating the interior of each wave monomer structure 2 through an opening 20 on each wave monomer structure 2, and enabling the wave monomer units 3 included in each wave monomer structure 2 to be inflated and extended completely through an airflow channel 13 to form a space curved surface shape;
in step 4, in the concrete implementation, an air compressor on the installation ship can be taken and used for inflating the opening 20 reserved at the upper edge 15 of the wave monomer unit, and the air enables the wave monomer structure 2 to be inflated and extended through the airflow channel 13, so that a space curved surface is formed.
And 5, filling and forming: after passing through the opening 20, filling the concrete 18 mixed in advance in the dry place into the plurality of wave monomer structures 2 along the airflow channel 13 (white dots on the wave monomer structures 2 in fig. 6 are indicated by aggregate filling of the concrete 18), and in the filling process, circularly performing a plurality of times of filling operations on the concrete 18 on the plurality of wave monomer structures 2 to ensure that the slurry is fully extended until the filling surface 19 of the concrete 18 rises to the upper edge 17 of the target protection structure (at this time, an air compressor and grouting equipment need to be closed in time), and then plugging the opening 20, so as to complete the construction of the bionic wave vortex breaking structure;
concrete 18 filling operation each time, specifically; filling concrete 18 with preset volume into the plurality of wave monomer structures 2 one by one along the circumferential direction of the target protective structure 1;
in step 5, a predetermined volume of concrete 18, preferably a volume of concrete 18 of the wave-shaped monomer unit 3, is implemented.
It should be noted that, for the present invention, if the target protection structure 1 is a foundation structure (needs to be sunk into an area below the sea level), the advantages of small occupied space and small pile sinking resistance of the geotextile material can be exerted, and the foundation structure is first sunk to the calibrated target protection range and then is filled and molded. So far, the construction of the bionic wave vortex breaking structure is completed.
In order to further show the vortex breaking effect of the bionic wave structure provided by the invention, the bionic wave structure provided by the invention is compared with the existing common structure without protection under the same sea condition and the same reynolds number, as shown in fig. 7 and 8, the result shows that the bionic wave structure provided by the invention has an excellent vortex breaking effect and can greatly inhibit the generation of vortexes under the action of sea currents.
In order to more clearly understand the technical solution of the present invention, the following describes the working principle of the present invention.
By applying the bionic wave vortex breaking structure, when sea current comes, due to the disturbance of the vortex breaking bionic wave structure separation area 7, the coming current is divided into four directions and then respectively flows to the transition area 8, then the coming current is gathered, accumulated and smoothly transited in the transition area 8 and then flows to the vortex breaking area 9, finally, the vortex breaking area 9 is simultaneously impacted by water flow from the four directions, and energy dissipation is carried out in the areas through mixing, rotating and colliding; due to the arrangement of the alternate arrangement with the difference of half wavelength (namely lambda/2), when the ocean current flows through the protected target protection structure 1, the ocean current repeatedly undergoes the separation, transition, vortex breaking and energy dissipation processes, and the generation of vortexes around the protected target protection structure 1 is greatly reduced, so that the aims of vortex breaking and shock absorption of the target protection structures 1 such as ocean structures and the like and vortex breaking and shock reduction of the base structures are achieved, and the problems of local scouring depth and vortex induced vibration around the ocean structures are effectively reduced.
Compared with the prior art, the bionic wave vortex breaking structure and the construction method thereof provided by the invention have scientific design, and compared with the prior art, the bionic wave vortex breaking structure can reduce the vortex-induced vibration phenomenon and the local scouring depth of the foundation structure and improve the reliability and adaptability of the foundation structure in the severe ocean environment by adopting the bionic wave vortex breaking mode on the premise of economic feasibility and construction convenience, and has great practical significance.
The technical scheme of the invention is a novel offshore wind power streaming vortex breaking structure which is applicable to the field of oceans, is not influenced by incoming flow angles, and has obvious vortex breaking, impact reducing and damping effects and a construction method thereof. The invention is a necessary choice and a new way to improve the adaptability and the reliability of the offshore wind power foundation in the severe ocean environment.
Compared with the prior art, the bionic wave vortex breaking structure provided by the invention is scientific in structural design, low in material cost, easy to obtain, capable of being prefabricated, directly installed on site, easy to construct and convenient to disassemble, assemble, replace and maintain. When the ocean current comes, the separation, transition and vortex breaking effects can be effectively exerted, so that the flow velocity around the target protection structure is reduced, the alternative vortex shedding is reduced, the foundation soil retention is enhanced, the problems of vortex-induced vibration and foundation soil movement under the action of the ocean current for a long time are solved, the vortex can be reasonably broken, the shock absorption is realized, the speed is limited, the soil is fixed, and the scouring on the foundation is reduced.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A bionic wave vortex breaking structure is characterized by comprising a plurality of wave monomer structures (2);
the wave monomer structures (2) are alternately arranged and distributed along the circumferential direction of the peripheral outer wall of the target protection structure (1);
the top of each wave monomer structure (2) is provided with a wave monomer structure upper edge (16) which is fixedly connected with a target protection structure upper edge (17);
the lower edge (14) of each wave monomer structure is arranged at the bottom of each wave monomer structure (2) and is fixedly connected with the lower edge (15) of the target protection structure;
each wave monomer structure (2) comprises a plurality of wave monomer units (3) which are connected with each other, the wave monomer units (3) are distributed on the side wall of the target protection structure (1) along the axial direction of the target protection structure (1), and any two adjacent wave monomer units (3) are distributed in an up-and-down symmetrical mode;
the two side edges of each wave monomer structure (2) are distributed on the outer side wall of the target protection structure (1) in a sine curve shape (12);
the wavelength lambda and the amplitude omega of the sine curve are determined according to the length L and the diameter D of the target protection structure (1) respectively;
the wavelength lambda of the sine curve (12) is not more than L/2;
the amplitude omega of the sine curve (12) is larger than D/10 and smaller than D/5;
any two adjacent wavy monomer structures (2) have a phase difference of lambda/2.
2. The bionic wave vortex breaking structure according to claim 1, wherein, for each wave monomer structure (2), a water flow treatment area is arranged on any two adjacent wave monomer units (3) which are distributed up and down;
the water flow treatment area comprises a separation area (7), a transition area (8) and a vortex breaking area (9) which are sequentially connected from top to bottom;
wherein, the separation zone (7) is positioned in the upper unit of the two wavy monomer units (3) and is higher than the peak position of 3/4 amplitude of the sine curve (12);
a transition zone (8) located in the upper one of the two undulating monomer units (3), below the 3/4 amplitude of the sinusoid (12), and above the transition point of the 1/4 amplitude of the sinusoid (12);
and the vortex breaking region (9) is positioned in the opposite connection region of the two wavy monomer units (3) and is lower than the depression part of 1/4 amplitude of the sine curve (12).
3. The bionic wave vortex breaking structure according to claim 1, wherein when n wave monomer structures (2) are included, n is an even number, and the outer contour diameter of the wave monomer structures (2) is designed by the following formula:
Dmagic cardD +2 ω cos (2 π y/λ), equation (1);
DdollD +2 ω cos (2 π y/λ + λ/2), equation (2);
the n wave monomer structures (2) are respectively sequenced and marked in sequence in advance, and the even number wave monomer structures and the odd number wave monomer structures are obtained by definition;
Dmagic card、DDollThe outer contour diameters of the odd-number wave monomer structure and the even-number wave monomer structure are respectively;
d is the diameter of the target protective structure (1);
ω is the amplitude of the sinusoid (12);
λ is the wavelength of the sinusoid (12);
n is the number of the wave monomer structures (2) which are uniformly arranged along the circumferential direction of the peripheral outer wall of the target protection structure (1) and is an even number;
y is the elevation in the height direction.
4. A construction method of a bionic wave vortex breaking structure according to any one of claims 1 to 3, characterized by comprising the following steps:
step 1, sewing and forming: using geotextile, and obtaining a plurality of wave monomer structures (2) with two side edges distributed in a sine curve (12) shape by sewing, wherein a hollow airflow channel (13) is reserved inside each wave monomer structure (2) and comprises a plurality of hollow wave monomer units (3) which are connected with each other;
the axial length of each wave monomer structure (2) is equal to that of the target protection structure (1);
step 2, alternately arranging: a plurality of wave monomer structures (2) are alternately distributed and arranged along the circumferential direction of the peripheral outer wall of the target protection structure (1), and the phase difference between any two adjacent wave monomer structures (2) is lambda/2; λ is the wavelength of the sinusoid;
step 3, stretch forming: fixedly connecting the lower edge (14) of the wave monomer structure at the bottom of each wave monomer structure (2) with the lower edge (15) of the target protection structure, then each wave monomer structure (2) is upwards stretched along the axial direction of the target protection structure (1) until the wave monomer structure upper edge (16) arranged at the top of each wave monomer structure (2) is aligned with the target protection structure upper edge (17), then the upper edge (16) of the wave monomer structure is fixedly connected with the upper edge (17) of the target protection structure, then a plurality of wave monomer structures (2) are arranged at the part between the upper edge (16) of the wave monomer structures and the lower edge (14) of the wave monomer structures, the wave single structure is fixed with the peripheral outer wall of the target protection structure (1) to form a whole, and the prefabrication step of the wave single structure (2) and the target protection structure (1) on land is completed;
wherein, an opening (20) is reserved on the upper edge (1) of the wave monomer structure on the top of each wave monomer structure (2);
and 4, inflating and forming: transporting the target protection structure (1) of the sewn wave monomer structure (2) to a designated target installation site in a floating manner, then inflating the interior of the wave monomer structure (2) through an opening (20) on each wave monomer structure (2), and enabling the air to flow through an air flow channel (13), so that all wave monomer units (3) included in each wave monomer structure (2) are inflated and extended to form a space curved surface shape;
and 5, filling and forming: after passing through the opening (20), filling concrete (18) mixed in advance in a dry place into the plurality of wave monomer structures (2) along the airflow channel (13), and in the filling process, circularly performing a plurality of times of concrete (18) filling operations on the plurality of wave monomer structures (2) to ensure that slurry is fully extended until a filling surface (19) of the concrete (18) rises to the upper edge (17) of the target protection structure, and then plugging the opening (20), so as to finish the construction of the bionic wave vortex breaking structure;
each time of concrete (18) filling operation, in particular; and filling concrete (18) with preset volume into the plurality of wave monomer structures (2) one by one along the circumferential direction of the target protection structure (1).
5. The construction method of the bionic wave vortex breaking structure according to claim 4, wherein in step 2, before arranging the plurality of wave monomer structures (2), a region division operation can be performed in advance, specifically as follows:
a plurality of dividing blocks (10) are uniformly divided on the peripheral outer wall of the cylindrical target protection structure (1) along the circumferential direction, and the phase difference between any two adjacent dividing blocks (10) is lambda/2;
after the zone division is carried out, a wave monomer structure (2) is respectively arranged at the position of each divided zone (10).
6. The method for constructing a vortex breaking structure by using bionic waves as claimed in claim 4, wherein in the step 5, the preset volume of concrete (18) is the volume of concrete (18) of one wave monomer unit (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111634069.6A CN114411794A (en) | 2021-12-29 | 2021-12-29 | Bionic wave vortex breaking structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111634069.6A CN114411794A (en) | 2021-12-29 | 2021-12-29 | Bionic wave vortex breaking structure and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114411794A true CN114411794A (en) | 2022-04-29 |
Family
ID=81270111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111634069.6A Pending CN114411794A (en) | 2021-12-29 | 2021-12-29 | Bionic wave vortex breaking structure and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114411794A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908408A (en) * | 2009-06-02 | 2010-12-08 | 张政波 | Inductor for respiratory volume kinescope |
| CN105863259A (en) * | 2016-05-19 | 2016-08-17 | 江苏科技大学 | Concrete cylinder inflatable formwork and use method thereof |
| CN208701945U (en) * | 2018-07-20 | 2019-04-05 | 四川森海鑫声学科技有限公司 | A kind of waveform diffusing sound absorbent |
| US20190154099A1 (en) * | 2017-11-21 | 2019-05-23 | Valmont Industries, Inc. | Method and apparatus of providing energy absorption for vibration dampening in a horizontal plane |
| CN113718828A (en) * | 2021-09-16 | 2021-11-30 | 中国华能集团清洁能源技术研究院有限公司 | Offshore wind power foundation |
-
2021
- 2021-12-29 CN CN202111634069.6A patent/CN114411794A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908408A (en) * | 2009-06-02 | 2010-12-08 | 张政波 | Inductor for respiratory volume kinescope |
| CN105863259A (en) * | 2016-05-19 | 2016-08-17 | 江苏科技大学 | Concrete cylinder inflatable formwork and use method thereof |
| US20190154099A1 (en) * | 2017-11-21 | 2019-05-23 | Valmont Industries, Inc. | Method and apparatus of providing energy absorption for vibration dampening in a horizontal plane |
| CN208701945U (en) * | 2018-07-20 | 2019-04-05 | 四川森海鑫声学科技有限公司 | A kind of waveform diffusing sound absorbent |
| CN113718828A (en) * | 2021-09-16 | 2021-11-30 | 中国华能集团清洁能源技术研究院有限公司 | Offshore wind power foundation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6386455B2 (en) | Energy attenuator | |
| EP1802814B1 (en) | Breakwater wave energy converter | |
| CN103334404B (en) | Detachable flexible floating breakwater unit body | |
| JP4947456B2 (en) | Floating structure | |
| CN204040050U (en) | Mixed type offshore wind power foundation structure | |
| WO2023040170A1 (en) | Offshore wind power foundation | |
| CN113530761B (en) | Floating type foundation of offshore wind turbine generator set with grid type structure and construction method | |
| KR100801441B1 (en) | Turbine structure and gate structure having flexible joint and inside stuffing for tidal power plant | |
| US10252781B2 (en) | Floating mounting having a depth-variable horizontal cross-section | |
| CN114411794A (en) | Bionic wave vortex breaking structure and construction method thereof | |
| CN112339924A (en) | Platform foundation structure of semi-submersible offshore wind generating set | |
| TWI653376B (en) | Water work platform | |
| CN217706214U (en) | Foam plastic raft type drilling platform suitable for water drilling in low-water area | |
| CN204000763U (en) | Old tire and concrete block combined type wash away protector | |
| CN212508652U (en) | Floating type foundation of offshore wind turbine generator set with grid type structure | |
| JP5843689B2 (en) | Tsunami, high wave defense dike | |
| US3921408A (en) | Anti-heave protective system | |
| Wahyuni et al. | Effect of angle of inclination cables on the performance of submerged floating tunnel under hydrodynamic load | |
| KR101290920B1 (en) | Turbine structure for tidal power plant | |
| CN106958235A (en) | The Hydraulic Design Method of water conservancy diversion bank-baffle pier-beam column construction baffle wall style combined energy dissipater | |
| JP5342048B1 (en) | Offshore underwater breakwater | |
| CN203142985U (en) | Water floating base platform for ocean current power generation | |
| JP6418623B1 (en) | Folding channel for hydroelectric power generation | |
| KR102624042B1 (en) | Floating offshore structures and floating offshore power plant having the same | |
| KR102637606B1 (en) | Floating offshore structures and floating offshore power plant having the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |