JP5412148B2 - Basic structure of floating offshore wind turbine generator - Google Patents

Basic structure of floating offshore wind turbine generator Download PDF

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JP5412148B2
JP5412148B2 JP2009060967A JP2009060967A JP5412148B2 JP 5412148 B2 JP5412148 B2 JP 5412148B2 JP 2009060967 A JP2009060967 A JP 2009060967A JP 2009060967 A JP2009060967 A JP 2009060967A JP 5412148 B2 JP5412148 B2 JP 5412148B2
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floating body
floating
outer peripheral
offshore wind
basic structure
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JP2010216273A (en
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浩一郎 安野
将生 国元
英紀 田中
俊康 三好
恒浩 関本
英之 鈴木
幸成 福本
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Tokyo Electric Power Co Inc
Penta Ocean Construction Co Ltd
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/107—Semi-submersibles; Small waterline area multiple hull vessels and the like, e.g. SWATH
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/12—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly
    • B63B2001/128—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly comprising underwater connectors between the hulls
    • 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
    • B63B2035/4433—Floating structures carrying electric power plants
    • B63B2035/446—Floating structures carrying electric power plants for converting wind energy into electric energy
    • 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
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • 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
    • Y02E10/70—Wind energy
    • Y02E10/727—Offshore wind turbines

Description

本発明は、洋上にアンカーで係留される浮体において風力発電を行う浮体式の洋上風力発電装置における基礎構造に関するものである。   The present invention relates to a foundation structure in a floating offshore wind power generator that generates wind power in a floating body moored by an anchor on the ocean.

自然エネルギーである風力を活用した発電方法が、地球環境に優しい活用方法として我が国でも実用されようとしている。この風力発電は、山林立地から多大な風量が得られる洋上立地へと転換しつつある。この洋上風力発電において、基礎構造には着底式と浮体式とがあるが、我が国は、海底地形が陸地から遠ざかるにつれて急激に水深が増すため、着定式の風力発電装置は経済的に不向きであって、浮体式の風力発電装置とすることが有利である。そこで、この浮体式の風力発電施設として、特許文献１，２に記載されているものが知られている。具体的には、複数の浮体部を剛体を有する部材によって環状に連結するものである。環状の中心位置に中間連結部を配置して、引張部で前記浮体部と中間連結部を連結して構成するものである。
特開２００６−３２７２５２号公報 特開２００７−１６０９６５号公報 A power generation method using wind power, which is a natural energy, is about to be put to practical use in Japan as a utilization method friendly to the global environment. This wind power generation is changing from a forest location to an offshore location where a large amount of wind can be obtained. In this offshore wind power generation, there are two types of foundation structures: a bottomed type and a floating type. Therefore, it is advantageous to use a floating wind power generator. Then, what was described in patent documents 1 and 2 is known as this floating-type wind power generation facility. Specifically, a plurality of floating body portions are connected in a ring shape by a member having a rigid body. An intermediate connecting portion is disposed at an annular center position, and the floating body portion and the intermediate connecting portion are connected by a tension portion.
JP 2006-327252 A JP 2007-160965 A

しかし、発電施設においてはナセル重量が最も大きく、ブレード回転に伴う回転モーメントが非常に大きい。従って浮体は回転モーメントの影響により傾斜することになり、それにより発電効率が低下してしまうので、浮体構造として傾斜を抑制する構造にしなければならない。この浮体傾斜の抑制のために、復元力を確保する構造にするには、浮体質量を大きくしたり、中立軸廻りの水線面二次モーメントを大きくしたりする方法がある。しかしながら、単に浮体質量を大きくするのは、コストが嵩むと共に全体構造が大きくなり製造・運搬にも支障を来すことになる。また、水線面二次モーメントを大きくするには、浮体の平面的レイアウトを大きくすることであるが、経済性に劣ることになる。前記水線面二次モーメントが大きくなると基礎構造における連結梁などの部材に大きな応力が作用するので、基礎構造全体をコンパクトにして作用応力を低減させることが好ましい。更に、浮体が平面的に回転すると、係留しているチェーンなどが絡まるおそれがあり、浮体の安全性が損なわれることになる。本発明に係る浮体式洋上風力発電装置の基礎構造は、このような課題を解決するために提案されたものである。   However, in the power generation facility, the nacelle weight is the largest, and the rotational moment accompanying the blade rotation is very large. Accordingly, the floating body is inclined due to the influence of the rotational moment, and thereby the power generation efficiency is lowered. Therefore, the floating body structure must be structured to suppress the inclination. In order to suppress the floating body inclination, a structure that secures a restoring force includes a method of increasing the mass of the floating body or increasing the second moment of water surface around the neutral axis. However, simply increasing the mass of the floating body increases the cost and increases the overall structure, which hinders manufacturing and transportation. In order to increase the water surface secondary moment, it is necessary to increase the planar layout of the floating body, but this is inferior in economic efficiency. When the water surface moment of inertia increases, a large stress acts on a member such as a connecting beam in the foundation structure. Therefore, it is preferable to reduce the acting stress by making the entire foundation structure compact. Furthermore, when the floating body rotates in a planar manner, the moored chain or the like may be entangled, and the safety of the floating body is impaired. The basic structure of the floating offshore wind turbine generator according to the present invention has been proposed in order to solve such problems.

本発明に係る浮体式洋上風力発電装置の基礎構造の上記課題を解決して目的を達成するための要旨は、一つの浮体と、この浮体を中心にしてその周囲に配置される複数個の外周浮体とを互いに剛性を有する部材で連結した状態で洋上に浮かべ、少なくとも前記浮体の一つに風力発電用機材を載置して成る浮体装置と、前記中心部の浮体の下部に接続されるアンカーとでなる洋上風力発電装置の基礎構造において、前記複数個の外周浮体の全てに、前記中心部の浮体を中心とする半径の外側に向けて当該外周浮体部の外部に突出させた復元力補強部が設けられていることである。 The gist for solving the above-mentioned problems of the foundation structure of the floating offshore wind power generator according to the present invention is to achieve one object, and a plurality of outer peripheries arranged around the floating body. A floating body device in which a floating body is floated on the ocean in a state of being connected to each other by members having rigidity, and a wind power generator is mounted on at least one of the floating bodies, and an anchor connected to a lower portion of the floating body in the central portion In the basic structure of the offshore wind power generator, the restoring force reinforcement is projected to the outside of the outer peripheral floating body part toward the outside of the radius centered on the floating body of the central part on all of the plurality of outer peripheral floating bodies Part is provided.

前記復元力補強部は、外周浮体の最大幅よりも狭い幅で、上下方向において前記外周浮体の長さと同じかそれより短い長さの大きさで、全体が矩形状に形成され若しくは平面視する断面形状が略三角形状か半楕円形状のいずれかに形成されていること、；
また、前記外周浮体と復元力補強部とは、その間に隔壁を有して２段以上の構造となっていることを含み、
更に、前記中心部の浮体と復元力補強部と一体になった外周浮体とは、外周浮体間に架設される連結部材である外周連結梁とこれの略中央部に一端が連結され他端が前記中心部の浮体に連結される連結部材である中央連結梁を介して、連結されていることとするのが好ましいものである。 The restoring force reinforcing portion is narrower than the maximum width of the outer peripheral floating body, and has a length that is the same as or shorter than the length of the outer peripheral floating body in the vertical direction, and is entirely formed in a rectangular shape or viewed in plan view The cross-sectional shape is formed in either a substantially triangular shape or a semi-elliptical shape;
Further, the outer peripheral floating body and the restoring force reinforcing portion include a structure having two or more steps having a partition wall therebetween,
Further, the outer peripheral floating body integrated with the central floating body and the restoring force reinforcing portion is an outer peripheral connecting beam that is a connecting member installed between the outer peripheral floating bodies and one end connected to the substantially central portion of the outer peripheral connecting beam. It is preferable to be connected via a central connecting beam which is a connecting member connected to the floating body at the center.

本発明の浮体式洋上風力発電装置の基礎構造によれば、コンパクトな基礎構造に設定できて水線面二次モーメントを大きくすることができるので、経済性に優れた浮体構造を構築できる。外周浮体構造を外向きに２段以上にすることで、復元力を効率的に高めることができて、基礎構造の傾斜を例えば５°以内に抑制して発電効率が向上するとともに、回転に対する抵抗力が大きくなり、浮体を係留するチェーンが絡まるのを防止できる。
また、全体の浮体質量を低減できるので、施工性に優れている。更に、各部材への作用応力を低減することができて、安全性が向上するばかりでなく部材の規格も低減できるものである。 According to the foundation structure of the floating offshore wind power generator of the present invention, a compact foundation structure can be set and the water surface moment can be increased, so that a floating structure excellent in economic efficiency can be constructed. By making the outer peripheral floating structure two or more steps outward, the restoring force can be increased efficiently, and the power generation efficiency is improved by suppressing the inclination of the foundation structure to within 5 °, for example, and resistance to rotation The force is increased, and the chain mooring the floating body can be prevented from being tangled.
Moreover, since the whole floating body mass can be reduced, it is excellent in workability. Furthermore, the acting stress on each member can be reduced, and not only the safety is improved but also the standard of the member can be reduced.

本発明に係る浮体式洋上風力発電装置の基礎構造１は、図１に示すように、一つの浮体２と、この浮体２を中心にしてその周囲に配置される複数個の外周浮体３，３…とを互いに剛性を有する部材４で連結した状態で洋上に浮かべ、少なくとも前記浮体の一つに風力発電用機材５を載置して成る浮体装置６と、前記中心部の浮体２の下部に接続されるアンカー、例えばチェーン７とでなるものである。   As shown in FIG. 1, a basic structure 1 of a floating offshore wind power generator according to the present invention includes a single floating body 2 and a plurality of outer peripheral floating bodies 3, 3 arranged around the floating body 2. Are floated on the ocean in a state of being connected by members 4 having rigidity, and a floating body device 6 in which a wind power generation equipment 5 is placed on at least one of the floating bodies, and a lower part of the floating body 2 at the center. It consists of an anchor to be connected, for example a chain 7.

前記浮体２，外周浮体３は、ともに、コンクリート製である。剛性を有する部材である外周連結梁４は、例えば、鋼管部材である。浮体２、外周浮体３の大きさは、一例として、直径９ｍ〜１０ｍ、高さが３０ｍ〜３２ｍ程度であり、基礎構造１の全体幅は９６ｍ程度である。   Both the floating body 2 and the outer peripheral floating body 3 are made of concrete. The outer peripheral connection beam 4 which is a member having rigidity is, for example, a steel pipe member. The size of the floating body 2 and the outer peripheral floating body 3 is, for example, a diameter of 9 m to 10 m, a height of about 30 m to 32 m, and the entire width of the foundation structure 1 is about 96 m.

前記外周浮体３には、前記中心部の浮体２を中心とする半径の外側に向けて突出させたコンクリート製の復元力補強部８が設けられている。該復元力補強部８は、外周浮体３の最大幅よりも狭い幅で、上下方向において前記外周浮体の長さと同じかそれより短い長さの大きさで、図１で示したものは全体が矩形状に形成されている。   The outer peripheral floating body 3 is provided with a restoring force reinforcing portion 8 made of concrete that protrudes toward the outside of the radius centered on the floating body 2 at the center. The restoring force reinforcing portion 8 is narrower than the maximum width of the outer peripheral floating body 3 and has a length that is the same as or shorter than the length of the outer peripheral floating body in the vertical direction. It is formed in a rectangular shape.

前記復元力補強部８は、図２（Ａ）に示す上記実施例に限定されず、例えば、図２（Ｂ）に示すように、平面視する断面形状が略三角形状か、同図（Ｃ）に示すように、半楕円形状のいずれかに形成されているものでもよい。   The restoring force reinforcing portion 8 is not limited to the above-described embodiment shown in FIG. 2A. For example, as shown in FIG. ), It may be formed in any of a semi-elliptical shape.

前記外周浮体３と復元力補強部８とは、一体にして形成され、若しくは別体にして形成されるものであり、図３（Ａ）に示すように、その間に隔壁１０を有して２段以上の構造となっている。図示したものは２段であるが、３段以上でも良い。尚、外周浮体３の形状は、円筒状に限らず、図４（Ａ）に示すように、２段の矩形構造とすることもできる。   The outer peripheral floating body 3 and the restoring force reinforcing portion 8 are formed integrally or separately, and have a partition wall 10 between them as shown in FIG. It has a structure with more than steps. Although the illustrated one has two stages, it may have three or more stages. In addition, the shape of the outer periphery floating body 3 is not limited to a cylindrical shape, but may be a two-stage rectangular structure as shown in FIG.

また、他の実施例として、図４（Ｂ）に示すように、剛性を有する部材である外周連結梁４と外周浮体３との接合位置を変えて外側寄りに連結したり、図４（Ｃ）に示すように、矩形状の外周浮体３の側壁面に直交して外周連結梁４が接続されて、その外周浮体３に角部に矩形状の復元力補強部８を設けるようにしたり、図４（Ｄ）に示すように、外周連結梁４の端部４ｃを折り曲げて外周浮体３と連結するようにすることもできる。   As another embodiment, as shown in FIG. 4B, the outer peripheral connecting beam 4 which is a rigid member and the outer peripheral floating body 3 are connected at the outer side by changing the joining position, or FIG. ), The outer peripheral connecting beam 4 is connected orthogonally to the side wall surface of the rectangular outer floating body 3, and the outer peripheral floating body 3 is provided with a rectangular restoring force reinforcing portion 8 at the corner, As shown in FIG. 4D, the end 4c of the outer peripheral connection beam 4 can be bent and connected to the outer peripheral floating body 3.

前記外周浮体３が復元力補強部８と一体になることで、図５（Ａ），（Ｂ）に示すように、風力で浮体構造６が傾斜した場合、その復元力は、Ｆ＝ＧＭ×Ｗsinθであり、（ＧＭ：メタセンター高さｍ、以下アンダーラインで長さを表す）、各要素は、Ｇ重心、Ｍ傾心、Ｗ浮体質量（ｔｆ）、θ傾斜角度（ｄｅｇ）である。そこで、前記ＧＭを大きくすることが出来れば、浮体質量Ｗをその分小さくしても、同等の復元力が得られる。前記ＧＭを大きくするために、ＧＭ＝Ｉ／Ｖ−ＣＧ から水線面二次モーメントを大きくするものである（Ｉ：水線面の長軸に対する断面二次モーメントｍ４、Ｖ：排水容積ｍ３、Ｃ：浮心）。前記復元力補強部８により、外側に張り出させることで前記Ｉが大きくなるものである。これによって、復元力が大きくなり浮体装置６の傾斜を５°以内に抑えて、外周浮体３の質量も従来の浮体の質量よりも小さくすることができる。 As shown in FIGS. 5A and 5B, when the outer peripheral floating body 3 is integrated with the restoring force reinforcing portion 8, when the floating structure 6 is inclined by wind force, the restoring force is F = GM × Wsinθ ( GM : metacenter height m, hereinafter, the length is represented by an underline), each element is G center of gravity, M tilt, W floating body mass (tf), and θ tilt angle (deg). Therefore, if the GM can be increased, an equivalent restoring force can be obtained even if the floating body mass W is decreased accordingly. In order to increase the GM, the secondary moment of the water line surface is increased from GM = I / V- CG (I: secondary moment of inertia m 4 with respect to the long axis of the water line surface, V: drainage volume m. 3 , C: buoyancy). The I is increased by projecting outward by the restoring force reinforcing portion 8. As a result, the restoring force is increased, the inclination of the floating body device 6 is suppressed to within 5 °, and the mass of the outer peripheral floating body 3 can be made smaller than the mass of the conventional floating body.

前記中心部の浮体２と、復元力補強部８と一体になった外周浮体３とは、図１乃至図３（Ａ）に示すように、外周浮体３，３間に架設される外周連結梁４とこれの略中央部に一端が連結され他端が前記中心部の浮体２に連結される中央連結梁９を介して、連結されている。尚、従来例では、図３（Ｂ）に示すように、中心部の浮体２と、外周浮体３とを、直接的に連結梁４ｂで連結していて、１浮体当たり３点で連結梁４ａ，４ｂとの接合部がある。   The floating body 2 at the center and the outer peripheral floating body 3 integrated with the restoring force reinforcing portion 8 are an outer peripheral connecting beam constructed between the outer peripheral floating bodies 3 and 3, as shown in FIGS. 4 and a substantially central portion thereof are connected to each other via a central connecting beam 9 whose one end is connected to the floating body 2 in the central portion. In the conventional example, as shown in FIG. 3B, the floating body 2 at the center and the outer floating body 3 are directly connected by the connecting beam 4b, and the connecting beam 4a is connected at three points per floating body. , 4b.

上記本発明に係る浮体装置６とすることにより、外周浮体３には、外周連結梁４との接合部が２点となり、作用応力が低減される。また、中心部の浮体２から張り出す中央連結梁９の長さを短くすることにより、この中央連結梁９への作用応力を小さくすることができて部材の規格を低減することができる。   By setting it as the floating body apparatus 6 which concerns on the said invention, in the outer periphery floating body 3, the junction part with the outer periphery connection beam 4 becomes two points, and an action stress is reduced. Further, by shortening the length of the central connecting beam 9 protruding from the floating body 2 at the center, the acting stress on the central connecting beam 9 can be reduced, and the standard of the member can be reduced.

以上の様にして、本発明に係る浮体式洋上風力発電装置の基礎構造１によれば、連結梁や浮体の所要質量が、従来に比較して１０〜２０％程度低減されて、制作費としても２０〜２５％程度削減されるものである。   As described above, according to the foundation structure 1 of the floating offshore wind power generator according to the present invention, the required mass of the connecting beam and the floating body is reduced by about 10 to 20% compared to the conventional case, and the production cost is reduced. Is also reduced by about 20 to 25%.

本発明に係る浮体式洋上風力発電装置の基礎構造１の概略全体斜視図である。1 is a schematic overall perspective view of a foundation structure 1 of a floating offshore wind power generator according to the present invention. 同本発明の浮体式洋上風力発電装置の基礎構造１の平面図（Ａ）と、復元力補強部８の他の実施例を示す平面視した断面図（Ｂ），（Ｃ）である。They are the top view (A) of the foundation structure 1 of the floating offshore wind power generator of the same invention, and sectional views (B) and (C) in plan view showing another embodiment of the restoring force reinforcing portion 8. 同浮体式洋上風力発電装置の基礎構造１の使用状態を示す縦断面図及び平面図（Ａ）と、従来例に係る風力発電装置の基礎構造の使用状態を示す縦断面図及び平面図（Ｂ）とである。A longitudinal sectional view and a plan view (A) showing the usage state of the foundation structure 1 of the floating offshore wind turbine generator, and a longitudinal sectional view and a plan view showing a usage state of the foundation structure of the wind turbine generator according to the conventional example (B) ). 本発明に係る浮体式洋上風力発電装置の基礎構造１における浮体装置６の他の実施例に係る平面図（Ａ）〜（Ｄ）である。It is the top views (A)-(D) which concern on the other Example of the floating body apparatus 6 in the foundation structure 1 of the floating body type offshore wind power generator concerning this invention. 浮体式洋上風力発電装置の基礎構造１の浮体装置６における復元の様子を示す説明図（Ａ），（Ｂ）である。It is explanatory drawing (A) which shows the mode of restoration in the floating body apparatus 6 of the foundation structure 1 of a floating body type offshore wind power generator.

１ 浮体式洋上風力発電装置の基礎構造、
２ 中心部の浮体、
３ 外周浮体、
４ 外周連結梁、 ４ａ，４ｂ 連結梁、
４ｃ 端部、
５ 風力発電用機材、
６ 浮体装置、
７ チェーン、
８ 復元力補強部、
９ 中央連結梁、
１０ 隔壁。 1 Basic structure of floating offshore wind power generator,
2 Floating body in the center,
3 outer floating body,
4 outer connecting beam, 4a, 4b connecting beam,
4c end,
5 Wind power equipment,
6 Floating device,
7 Chain,
8 Restoring force reinforcement,
9 Center connecting beam,
10 Bulkhead.

Claims (4)

一つの浮体と、この浮体を中心にしてその周囲に配置される複数個の外周浮体とを互い
に剛性を有する部材で連結した状態で洋上に浮かべ、少なくとも前記浮体の一つに風力発
電用機材を載置して成る浮体装置と、前記中心部の浮体の下部に接続されるアンカーとで
なる洋上風力発電装置の基礎構造において、
前記複数個の外周浮体の全てに、前記中心部の浮体を中心とする半径の外側に向けて当該外周浮体部の外部に突出させた復元力補強部が設けられていること、
を特徴とする浮体式洋上風力発電装置の基礎構造。 One floating body and a plurality of outer peripheral floating bodies arranged around the floating body are connected to each other by members having rigidity, and at least one of the floating bodies is equipped with wind power generation equipment. In the basic structure of an offshore wind power generator composed of a floating body device mounted and an anchor connected to the lower part of the floating body at the center,
All of the plurality of outer peripheral floating bodies are provided with a restoring force reinforcing portion that protrudes outside the outer peripheral floating body portion toward the outside of the radius centered on the floating body of the central portion,
The basic structure of a floating offshore wind turbine generator. 復元力補強部は、外周浮体の最大幅よりも狭い幅で、上下方向において前記外周浮体の
長さと同じかそれより短い長さの大きさで、全体が矩形状に形成され若しくは平面視する
断面形状が略三角形状か半楕円形状のいずれかに形成されていること、
を特徴とする請求項１に記載の浮体式洋上風力発電装置の基礎構造。 The restoring force reinforcing portion has a width that is narrower than the maximum width of the outer peripheral floating body, and has a size that is the same as or shorter than the length of the outer peripheral floating body in the vertical direction and is formed in a rectangular shape as a whole or viewed in plan view The shape is formed in either a substantially triangular shape or a semi-elliptical shape,
The basic structure of the floating offshore wind turbine generator according to claim 1. 外周浮体と復元力補強部とは、その間に隔壁を有して２段以上の構造となっていること
、
を特徴とする請求項１乃至２のいずれかに記載の浮体式洋上風力発電装置の基礎構造。 The outer peripheral floating body and the restoring force reinforcing part have a partition between them and have a structure of two or more stages,
The basic structure of the floating offshore wind turbine generator according to any one of claims 1 to 2. 中心部の浮体と復元力補強部と一体になった外周浮体とは、外周浮体間に架設される連
結部材である外周連結梁とこれの略中央部に一端が連結され他端が前記中心部の浮体に連
結される連結部材である中央連結梁を介して、連結されていること、
を特徴とする請求項１乃至３のいずれかに記載の浮体式洋上風力発電装置の基礎構造。 The outer floating body integrated with the central floating body and the restoring force reinforcing portion is an outer peripheral connecting beam that is a connecting member laid between the outer peripheral floating bodies and one end connected to the substantially central portion thereof, and the other end is the central portion. Being connected via a central connecting beam which is a connecting member connected to the floating body of
The basic structure of the floating offshore wind turbine generator according to any one of claims 1 to 3.
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