CN209634692U - A kind of novel semi-submersible type blower foundation of high stability - Google Patents
A kind of novel semi-submersible type blower foundation of high stability Download PDFInfo
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- CN209634692U CN209634692U CN201920306525.6U CN201920306525U CN209634692U CN 209634692 U CN209634692 U CN 209634692U CN 201920306525 U CN201920306525 U CN 201920306525U CN 209634692 U CN209634692 U CN 209634692U
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Abstract
The utility model relates to a kind of novel semi-submersible type blower foundations of high stability, including gin pole, heel post, buoyancy tank, diagonal brace；Gin pole is divided into two sections, and lower section diameter is impartial, and diameter successively decreases upper section from bottom to top；Heel post includes circumferentially distributed several groups inclination lateral columns interconnected and upright lateral column, and inclination lateral columns tilt outward from bottom to top, the upper end connection of upright lateral column and inclination lateral columns；Buoyancy tank is fixedly connected with the bottom end of inclination lateral columns and gin pole, and several buoyancy tanks constitute the lateral divergence shape structure centered on gin pole bottom；Diagonal brace one end is connect with gin pole, and the other end is connect with upright lateral column；The lower section of the centrally located column of Water Plane, the lower section of diagonal brace and upright lateral column position；Upright lateral column lower end and Water Plane distance are the wave amplitude height that sea situation next year one locating for platform meets wave；Buoyancy tank, gin pole, heel post are hollow structure, provide buoyancy for blower foundation.
Description
Technical field
The utility model relates to a kind of offshore wind turbine foundations, are a kind of novel semi-submersible type blowers of high stability specifically
Basis.
Background technique
The depth condition according to locating for marine wind electric field is different, can be classified as: intertidal belt wind electric field, offshore wind farms
With off-lying sea wind power plant.Wherein off-lying sea wind power plant is the sea area of theoretical lowest water level or less the 50m depth of water, is needed using floating type basis
To reduce development cost.Buoyant foundation is divided into following three classifications: column basis (Spar), semi-submersible type basis (Semi- at present
Submersible) and tension leg type is basic (TLP).Wherein Spar possesses lower center of gravity and lesser drinking water area, stability
Preferably but it is only applicable to deep water sea area and component assembling, mounting means complexity；TLP by means of vertical tension type anchoring system,
There is lesser motor imagination in wave, but anchoring system design requirement is high and installation is complicated.And semi-submersible type floating blower
Although the applicable depth of water range in basis is larger and mounting means is simple, traditional semi-submersible type basis comes with some shortcomings, such as platform
Center of gravity is relatively high, so that the stability nargin of platform is little；Column limited separation cause moment of inertia of waterplane be not enough to provide compared with
Good stability, marine windload square is larger, causes the longitudinal and transverse motion amplitude that shakes of semi-submersible structure larger, to reduce wind
The wind energy conversion efficiency of power machine, so that the hydrodynamic performance of semi-submersible structure is far away from Spar and TLP, using being restricted.
The existing semi-submersible type blower foundation overwhelming majority uses " right cylinder+strut " structure, therefore its statical stability, hydrodynamic force
The raising that movenent performance etc. is swashed in whirlpool under performance and action of ocean current is restricted:
1) semi-submersible type blower foundation mainly obtains system statical stability using moment of inertia of waterplane, and the prior art is then mainly led to
Following two method is crossed to obtain target inertial square: 1. increasing upright intercolumniation.This method will lead to the company between each column
Binding structure lengthens significantly, increases the stress and structural fatigue of supporting rod；2. increasing column cross-section product.This can be directly resulted in
The increase of buoyant foundation water plane area and displacement of volume improves construction cost, reduces installed power；Simultaneously also reduce
In the heaving period, when wave frequency is inspired with energy similar in heaving intrinsic frequency, platform can generate resonance, to hydrodynamic performance
It makes a very bad impression, greatly exacerbates the movement of semi-submersible type blower foundation across the sea, increase security risk.
2) semi-submersible type blower foundation is higher compared to Spar formula and TLP formula center of gravity, so that the stability nargin of platform is little.If
Want to lower the center of gravity, then needs to adjust ballast downwards, but since platform drinking water is relatively small, the space for adjusting ballast is extremely limited,
Result in serious limitation.
3) existing semi-submersible type basis connects each column using rod structures such as stull, diagonal braces, however because of many manufactures
Difficult and potential fatigue failure risk, this is unfavorable to floatation type structure.In addition, blower foundation produces under working condition
Raw six-freedom motion, the Water Exit of member structure will lead to the constantly variation of displacement and water plane area, so that platform
Motion state is unstable.
4) existing floating blower foundation is all made of circular abutment, single circular abutment processing difficulties and precision height both at home and abroad.
It is poor compared to the sharp movenent performance in square column whirlpool, lead to a wide range of transverse movement under action of ocean current, causes relative wind velocity stability
It reduces, to reduce the wind energy conversion efficiency of wind energy conversion system.
Utility model content
The purpose of the utility model is to provide a kind of novel semi-submersible type blower foundations of high stability, by changing inclining for lateral column
Gradient increases platform statical stability on the basis of not influencing the platform natural period, and reduces displacement；By using square column
Swash exercise effect in the whirlpool for improving platform；Replace rod piece as the connection between each column using lower floating body, what is lowered the center of gravity is same
When reduce fatigue damage；Lower floating body reduces the heaving period as heaving dampening mechanism, improves platform movenent performance；At sea
Under the action of wind, wave, stream loading, the platform hydrodynamic performance and stability are good, improve the same of the wind energy conversion efficiency of wind energy conversion system
When also improve the installed power of floating blower.
The utility model takes following technical scheme:
A kind of novel semi-submersible type blower foundation of high stability, including gin pole 1, heel post, buoyancy tank 4, diagonal brace 5；It is described
It is two sections that gin pole 1, which is divided to, and lower section diameter is impartial, and diameter successively decreases upper section from bottom to top；The heel post includes circumferentially distributed
Several groups inclination lateral columns 2 interconnected and upright lateral column 3, inclination lateral columns 2 tilt outward from bottom to top, upright lateral column 3 with
The upper end of inclination lateral columns 2 connects；The buoyancy tank 4 is fixedly connected with the bottom end of inclination lateral columns 2 and gin pole 1, several 4 structures of buoyancy tank
At the lateral divergence shape structure centered on 1 bottom of gin pole；Described 5 one end of diagonal brace is connect with gin pole 1, the other end
It is connect with upright lateral column 3；The lower section of the centrally located column 1 of Water Plane, the lower section of diagonal brace 5 and upright 3 position of lateral column；
Upright 3 lower end of lateral column and Water Plane distance are the wave amplitude height that sea situation next year one locating for platform meets wave；The buoyancy tank 4, in
Entreating column 1, heel post is hollow structure, provides buoyancy for blower foundation.
Further, the cross section of the inclination lateral columns 2 and upright lateral column 3 is rectangular, edge rounded corner.
Further, it is connected between gin pole 1 and heel post using buoyancy tank 4, further, three lower buoyancy tanks 4 collect
Place is to reinforce being hexagonal structure, and the stress that can reduce intensity larger part is concentrated.
Further, the upper end of the column is fixedly connected with tower 6, and 1 upper section of gin pole is gradually reduced upwards as tower 6
Outer diameter.
Further, walking channel is set on the diagonal brace 5, by diagonal brace 5 as lateral column to the interface channel between pylon.
A kind of design method of the novel semi-submersible type blower foundation of above-mentioned high stability, inclination lateral columns 2 are inclined outwardly not
Change the displacement of volume of platform entirety, maintain the radius of inertia and center of gravity constant by adjusting ballast, not to displacement and inherently
Period generates any influence；Wave action will not cause significant wave to climb on upright lateral column 3, and three sides when platform movement
Column water plane area is identical always and moment of inertia of waterplane is definite value, will not cause to change to stability and platform natural period.
Further, distance between upright 3 lower end of lateral column and Water Plane is set as sea situation next year one locating for platform to meet
The wave amplitude height of wave.
Further, lower floating body 4 reduces platform center of gravity as the structure for accommodating ballast, enhances stability, bottom is not provided with hanging down
Plate is swung, increases the additional mass in blower foundation heaving direction using lower floating body 4, increases blower foundation natural heaving period.
The utility model has the beneficial effects that:
1) upright lateral column is inclined outwardly certain angle by the utility model, is designed guaranteeing that displacement, natural period meet
In the case where it is required that, moment of inertia of waterplane is significantly increased, to increase the statical stability of semi-submersible type blower foundation.Stiffening is to increase
Strong floating platform weatherliness, guarantees an important ring for platform security.A certain position changes inclination lateral columns under Water Plane
Become straight up, such wave action will not cause significant wave to climb on vertical column；Upright lateral column lower end and water
Line identity distance is from the wave amplitude height for meeting wave for sea situation next year one locating for platform, when platform makees pitching, rolling and heaving
When, three lateral column water plane areas are identical always and moment of inertia of waterplane is definite value, will not cause to stability and platform natural period
It influences；If fan trouble needs repairing, the column near Water Plane straight up, is for ease of maintenaince leaned on by ship.
It is by numerical simulation that the right cylinder floating fan platform of identical displacement, identical lower buoyancy tank length is practical new with this
The stability of oblique column floating fan platform compares in type, when the Steady Wind of 11.4m/s acts at blower propeller hub height,
The former average tilt angle is 8.5 °, and the latter's average slope angle degree is only 5.8 °.
2) motion problems are swashed in the sea area more serious in ocean current, the whirlpool that the utility model is easy to improve floating blower foundation.
So that the utility model transverse movement under action of ocean current reduces, relative wind velocity stability is caused to be promoted, to improve wind-force
The wind energy conversion efficiency of machine.
3) the section design of three heel posts is changed to rectangular by circle, and edge is rectangular rounded corner.It in this way can be preferable
Ground is attached with lower floating box structure, advantageously reduces processing, manufacture difficulty.In addition, square column swashs fortune than circular abutment whirlpool
It is dynamic to have excellent performance.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the novel semi-submersible type blower foundation of the utility model high stability.
Fig. 2 is the structural schematic diagram at novel another visual angle of semi-submersible type blower foundation of the utility model high stability.
Fig. 3 is the novel semi-submersible type blower foundation main view of the utility model high stability.
Fig. 4 is the novel semi-submersible type blower foundation right view of the utility model high stability.
Fig. 5 is the novel semi-submersible type blower foundation design process schematic diagram of the utility model high stability.
Fig. 6 is using the upright lateral column platform of numerical simulation software star-ccm+ square shaped, the rectangular oblique column platform of the design
The the first width schematic diagram for swashing motor imagination analysis in whirlpool has been carried out in crucial reduced velocity section with round upright lateral column platform.
Fig. 7 is using the upright lateral column platform of numerical simulation software star-ccm+ square shaped, the rectangular oblique column platform of the design
The the second width schematic diagram for swashing motor imagination analysis in whirlpool has been carried out in crucial reduced velocity section with round upright lateral column platform.
In figure, 1. gin poles, 2. inclination lateral columns, 3. upright lateral columns, 4. lower buoyancy tanks, 5. diagonal braces, 6. pylons, 7. cabins,
8. propeller hub, 9. fan blades.
Specific embodiment
The present invention will be further described in the following with reference to the drawings and specific embodiments.
Referring to Fig. 1, the novel semi-submersible type blower foundation of high stability by gin pole 1, inclination lateral columns 3, upright lateral column 3, under
Buoyancy tank 4 and diagonal brace 5 form, and wherein 1 top of gin pole is connected with 6 bottom of tower, and floating blower further includes cabin 7, propeller hub 8
And the equal critical components of blade 9.
Gin pole 1 is circular abutment, and diameter is constant below Water Plane, is gradually reduced more than Water Plane as tower
6 root diameter (RD)s, and by being welded into an entirety with tower 6 preferably to transmit the wind loads on tower top and as far as possible
Ground avoids tower root from stress concentration occur.Three uniformly distributed heel posts are made of inclination lateral columns 2 and 3 two parts of upright lateral column,
From lower 4 upper level of buoyancy tank, inclination lateral columns 2 are inclined outwardly a certain angle from bottom to top until a certain distance below Water Plane
Place's cut-off, upright lateral column 3 are then kept upright until designing freeboard.Upright lateral column 3 chooses design in Water Plane height below
The wave amplitude size of the chance wave of sea situation next year one.Lower buoyancy tank 4 is by a central buoyancy tank and three sides in 120 ° of radial arrangements
Buoyancy tank is constituted, as the connection structure between three uniformly distributed inclination lateral columns 2 and gin pole 1, instead of being originally used for connection
Many rod pieces.Central buoyancy tank is connected to three side buoyancy tanks, and center, which emerges selection hexagonal structure, can reduce column 1 and buoyancy tank 4
The stress of junction is concentrated.
Inclination lateral columns 2 are inclined outwardly certain angle, in the case where guaranteeing that displacement, natural period meet design requirement,
Moment of inertia of waterplane is significantly increased, to increase the statical stability of semi-submersible type blower foundation；Inclination lateral columns 2 are restored near Water Plane
For upright lateral column 3, wave action will not cause significant wave to climb on upright lateral column 3, and three heel posts when platform movement
Water plane area is identical always and moment of inertia of waterplane is definite value, will not cause to change to stability and platform natural period.
In the design process, the outer dip angle of inclination lateral columns 2 is length and upright lateral column 3 by lower buoyancy tank 4 apart from flat
What the distance at platform center determined, the possible angle of flare is within the scope of 45 ° to 60 °.
The section of three heel posts (including inclination lateral columns 2 and upright lateral column 3) be it is rectangular, edge be rectangular rounded corner.
It can be preferably attached in this way with lower buoyancy tank 4, advantageously reduce processing, manufacture difficulty.In addition, square column is more vertical than round
It is excellent that movenent performance is swashed in column whirlpool.The case where analyzing below physical simulation is introduced:
It is upright using the upright lateral column platform of numerical simulation software star-ccm+ square shaped, rectangular oblique column platform and circle
Lateral column platform has carried out whirlpool in crucial reduced velocity section and has swashed motor imagination analysis.The following are under different reduced velocity ur,
Under 0 ° and 60 ° of inflow angles, the blower foundation of round right cylinder, rectangular right cylinder and the utility model central post form
Swash movenent performance comparison in whirlpool: as shown in Fig. 6 and Fig. 7: the result shows that, movement is swashed in lock room in the whirlpool of square-section column platform
Swash motor imagination amplitude and be greatly lowered compared with conventional circular section column platform in interior whirlpool.Round upright lateral column platform
The maximum value that the dimensionless nominal value of motor imagination amplitude is swashed in lateral whirlpool appears in 0 degree of angle of current, when reduced velocity Ur=9, about
For Ay/D=0.481.Swash the dimensionless nominal value of motor imagination amplitude in the platform transverse direction whirlpool of the utility model central post form
Maximum value also appears in 0 degree of angle of current, and when reduced velocity Ur=6, about Ay/D=0.279 is reduced compared with circular abutment
42%；Under 0 degree of angle of current, 52% is reduced.The transverse direction of the utility model central post form platform and rectangular upright lateral column platform
Whirlpool swashs motor imagination amplitude and is in lesser magnitude, and the two is of slight difference.And under higher reduced velocity, this is practical new
That column form in type compared to the whirlpool of rectangular right cylinder swashs motion amplitude is smaller, it was demonstrated that the superiority of the design.
Upright lateral column 3 and gin pole 1 are connected using three diagonal braces 5 more than Water Plane, reduce inclination lateral columns 2 and is floated downward
The active force of 4 junction of case；Simultaneously diagonal brace dumps that angle is smaller, can be used as lateral column to the bridging between pylon 6, if cabin
Facility needs repairing in 7, can will near maintenance ship-handling to upright lateral column 3, maintenance personal by diagonal brace row to pylon bottom end,
It is repaired into tower.
The performance of half submerged floating blower foundation will have a direct impact on the installed power of floating blower.When platform makees six degree of freedom fortune
When dynamic, the relative wind velocity of wind and fan blade 9 can constantly change, and wind-force is converted into mechanical energy by blade rotation, using gear
Case drives the electrical power generators in cabin 7.The excellent stability of blower foundation, hydrodynamic performance and whirlpool in the utility model
Sharp movenent performance can promote the wind energy conversion efficiency of wind energy conversion system, and it is whole that the raising of platform comprehensive performance can substantially reduce wind energy on the sea
Body development cost.
The key point of the utility model:
1) upright lateral column is inclined outwardly certain angle, guarantees the case where displacement, natural period meet design requirement
Under, moment of inertia of waterplane is significantly increased, to increase the statical stability of semi-submersible type blower foundation.In the more serious sea area of ocean current,
Swash motion problems in the whirlpool that the upright lateral column of flare is easy to improve floating blower foundation.So that the utility model is horizontal under action of ocean current
Reduce to movement, causes relative wind velocity stability to be promoted, to improve the wind energy conversion efficiency of wind energy conversion system.
2) inclination lateral columns are changed into straight up up to designing freeboard from a certain distance under Water Plane.Wave is made in this way
Significant wave will not be caused to climb on upright lateral column；Upright lateral column lower end and Water Plane distance are under sea situation locating for platform
The wave amplitude height for meeting wave for 1 year one, when platform makees pitching, rolling and heaving, three lateral column water plane areas phase always
Same and moment of inertia of waterplane is definite value, will not be impacted to stability and platform natural period；If fan trouble needs repairing, water
Column near line face straight up, for ease of maintenaince leans on by ship.
3) the section design of three heel posts is changed to rectangular by circle, and edge is rectangular rounded corner.It in this way can be preferable
Ground is attached with lower floating box structure, advantageously reduces processing, manufacture difficulty.In addition, square column swashs fortune than circular abutment whirlpool
Dynamic performance is good.
4) gin pole and three circumferential lateral columns are connected by lower buoyancy tank, reduces platform center of gravity, improves platform stability；Reduce
Structure fatigue damage is easily installed repairing；The vertical additional mass of platform is increased, the catenary motion natural period is extended, evacuation is altogether
Vibration frequency.
5) heel post and lower buoyancy tank junction are reduced using three diagonal brace connection lateral columns and gin pole more than Water Plane
Active force；Simultaneously diagonal brace dumps that angle is smaller, can be used as heel post to the bridging between pylon, if blower needs to tie up
It repairs, can be by near maintenance ship-handling to lateral column, maintenance personal, to pylon bottom end, is repaired by row of putting up a bridge into tower.
6) supporting rod is not used below Water Plane, the Water Exit of member structure will lead to displacement and Water Plane face
Long-pending constantly variation, so that platform motion state is unstable, the problem is also addressed after changing into no pillar connection type.
In conclusion this semi-submersible type blower foundation stability is good, hydrodynamic performance is superior, and the sharp motion range in whirlpool is small, structural type
Formula is succinct, and overall structural strength is good, and the wind energy conversion efficiency of wind energy conversion system is greatly improved under stormy waves stream synergy, while
Improve the installed power of floating blower.The raising of platform comprehensive performance and utilization rate can substantially reduce wind energy on the sea whole development
Cost.
It is the preferred embodiment of the utility model above, those of ordinary skill in the art can also carry out respectively on this basis
Kind of transformation improves, and under the premise of not departing from the utility model total design, these transformation or improves this reality all should belong to
Within the scope of novel be claimed.
Claims (6)
1. a kind of novel semi-submersible type blower foundation of high stability, it is characterised in that:
Including gin pole (1), heel post, buoyancy tank (4), diagonal brace (5)；
The gin pole (1) is divided into two sections, and lower section diameter is impartial, and diameter successively decreases upper section from bottom to top；
The heel post includes circumferentially distributed several groups inclination lateral columns interconnected (2) and upright lateral column (3), inclination lateral columns
(2) it tilts outward from bottom to top, upright lateral column (3) connect with the upper end of inclination lateral columns (2)；
The buoyancy tank (4) is fixedly connected with the bottom end of inclination lateral columns (2) and gin pole (1), and several buoyancy tanks (4) are constituted with center
Lateral divergence shape structure centered on column (1) bottom；
Described diagonal brace (5) one end is connect with gin pole (1), and the other end is connect with upright lateral column (3)；
The lower section of the centrally located column of Water Plane (1), the lower section of diagonal brace (5) and upright lateral column (3) position；Upstanding side
Column (3) lower end and Water Plane distance are the wave amplitude height that sea situation next year one locating for platform meets wave；The buoyancy tank (4), center
Column (1), heel post are hollow structure, provide buoyancy for blower foundation.
2. the novel semi-submersible type blower foundation of high stability as described in claim 1, it is characterised in that: the inclination lateral columns (2)
Cross section with upright lateral column (3) is rectangular, edge rounded corner.
3. the novel semi-submersible type blower foundation of high stability as described in claim 1, it is characterised in that: gin pole (1) and side
It is connected between column using buoyancy tank (4), is not provided with connecting rod.
4. the novel semi-submersible type blower foundation of high stability as described in claim 1, it is characterised in that: three lower buoyancy tanks (4) are converged
Ji Chu is to reinforce being hexagonal structure, and the stress that can reduce intensity larger part is concentrated.
5. the novel semi-submersible type blower foundation of high stability as described in claim 1, it is characterised in that: the upper end of the column and tower
(6) it is fixedly connected, gin pole (1) upper section is gradually reduced upwards as the outer diameter of tower (6).
6. the novel semi-submersible type blower foundation of high stability as described in claim 1, it is characterised in that: set on the diagonal brace (5)
Walking channel is set, by diagonal brace (5) as lateral column to the interface channel between pylon.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109774877A (en) * | 2019-03-12 | 2019-05-21 | 上海交通大学 | A kind of novel semi-submersible type blower foundation and its design method of high stability |
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2019
- 2019-03-12 CN CN201920306525.6U patent/CN209634692U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109774877A (en) * | 2019-03-12 | 2019-05-21 | 上海交通大学 | A kind of novel semi-submersible type blower foundation and its design method of high stability |
| CN109774877B (en) * | 2019-03-12 | 2024-01-23 | 上海交通大学 | High-stability semi-submersible type fan foundation and design method thereof |
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