JPH08127387A - Buoy - Google Patents
BuoyInfo
- Publication number
- JPH08127387A JPH08127387A JP34298093A JP34298093A JPH08127387A JP H08127387 A JPH08127387 A JP H08127387A JP 34298093 A JP34298093 A JP 34298093A JP 34298093 A JP34298093 A JP 34298093A JP H08127387 A JPH08127387 A JP H08127387A
- Authority
- JP
- Japan
- Prior art keywords
- ring
- buoy
- float
- drag
- force
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B22/00—Buoys
- B63B22/16—Buoys specially adapted for marking a navigational route
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は水流中でも波浪中でも姿
勢安定性をよくした航路標識用灯浮標や給餌用浮標等の
浮遊係留式の浮標に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating mooring type buoy, such as a traffic light buoy or a feeding buoy, which has improved posture stability in a water stream and in waves.
【0002】[0002]
【従来の技術】潮流等の流れに対して浮標の傾斜を小さ
くする構造として、 (a)浮体形状を円盤型にする。(図4参照) (b)水流に対する抵抗体を設けたもので、垂直板の組
合せによる十字状抵抗板を浮体下部に設けたり(図5参
照)、あるいは短円筒状の抵抗リングを浮体下方に支持
するのが(図6参照)一般的である。2. Description of the Related Art As a structure for reducing the inclination of a buoy with respect to a current such as a tidal current, (a) the shape of a floating body is a disk. (Refer to Fig. 4) (b) A resistance element against water flow is provided. A cross-shaped resistance plate formed by combining vertical plates may be provided at the bottom of the floating body (see Fig. 5), or a short cylindrical resistance ring may be provided below the floating body. It is generally supported (see FIG. 6).
【0003】[0003]
【発明が解決しようとする課題】(a)の場合、(1)
浮体下面の前縁に生じる揚力L(下向き)を利用して復
原モーメントを得る方式のため、流れが速くなるにつ
れ、浮標が沈下する。(2)浮体直径が大きくなり、浮
力の体積効率が悪い(同じ浮力を得るのに多くの材料が
必要)。(3)転覆の可能性がある。(4)動揺感度が
敏感すぎて乗り心地が悪い。平穏なのに不規則に小刻み
に揺れるなど欠点がある。In the case of (a), (1)
Since the lift moment L (downward) generated at the front edge of the lower surface of the floating body is used to obtain the restoring moment, the buoy sinks as the flow becomes faster. (2) The diameter of the floating body becomes large, and the volume efficiency of buoyancy is poor (many materials are required to obtain the same buoyancy). (3) There is a possibility of capsizing. (4) The vibration sensitivity is too sensitive and the riding comfort is poor. Although it is calm, it has the drawback of swaying irregularly.
【0004】(b)の場合、抗力を利用して、浮体に働
く傾斜モーメントとの逆のモーメントを抵抗板あるいは
抵抗リングの抗力Drで発生させる方式のため、抵抗体
分だけ抗力が増加し、浮標の水平荷重が大きくなり、浮
標の沈下や係留装置が大形化する。[0004] In the case of (b), by utilizing the drag, for the method to generate a reverse moment of the tilting moment acting on the floating body in the drag D r of the resistance plate or resistor rings, only resistor component increases drag The horizontal load on the buoy increases, and the buoy sinks and the mooring device becomes larger.
【0005】本発明は、水流中においては、浮体に働く
抗力による傾斜モーメントを打ち消すように作用する復
元モーメントが大きく、しかも抗力が少く、波浪中にあ
っても動揺減衰力が大きい安定性の高い浮標である。According to the present invention, in a water flow, a restoring moment acting to cancel a tilting moment due to a drag force acting on a floating body is large, a drag force is small, and a vibration damping force is large even in a wave, and stability is high. It is a buoy.
【0006】[0006]
【課題を解決するための手段】この目的を達成するた
め、本発明では、断面形状が中心方向に迎え角(鋭角
の)を持つ偏平なリングを浮体下方に支持した浮標であ
る。In order to achieve this object, the present invention provides a buoy in which a flat ring whose cross-sectional shape has an attack angle (acute angle) in the central direction is supported below a floating body.
【0007】[0007]
【作用】水流中においては、上流側のリングは水流に対
し負の迎え角となり、下向きの揚力Lと抗力Dr(Drは
Lより小さい)が働く。また下流側のリングは水流に対
し正の迎え角となり、上向きの揚力Lと抗力Drが働
き、いづれも浮標の抗力Dbによる傾斜モーメントMを
打ち消す逆のモーメントとして作用する。従って、リン
グの位置、形状を適宜にすれば、両モーメントは水流の
遅速にかかわらず、バランスがとれ、直立を保つことが
できる。In the water flow, the ring on the upstream side has a negative angle of attack with respect to the water flow, and the downward lift force L and the drag force D r (D r is smaller than L) act. Further, the ring on the downstream side has a positive angle of attack with respect to the water flow, an upward lift L and a drag force D r work, and both act as opposite moments that cancel out the tilt moment M due to the drag force D b of the buoy. Therefore, by appropriately adjusting the position and shape of the ring, both moments can be balanced and kept upright regardless of the slowness of the water flow.
【0008】また、リングの水流中における抗力は揚力
よりかなり小さく、従って浮標全体の抗力もリングによ
る増加分は少なく、係留力、従って係留装置に対する負
担は少くてすみ、浮標のリングの抗力による沈下は殆ど
なく、浮体も従来より小形でよい。さらにリング断面の
中心線の延長線が浮標の重心(動揺中心)により近い位
置を通るため、浮標の波浪等による動揺に対する抵抗板
として有効に働き、動揺を少くする。Further, the drag force of the ring in the water flow is much smaller than the lift force, and therefore the drag force of the buoy as a whole does not increase much due to the ring. The floating body may be smaller than before. Furthermore, since the extension line of the center line of the ring cross section passes closer to the center of gravity (center of sway) of the buoy, it effectively works as a resistance plate against the sway caused by waves of the buoy and reduces the sway.
【0009】[0009]
【実施例】図1は本発明を実施した浮標の1例を示し水
流中におけるリングの作用説明である。1は断面形状が
中心方向に迎え角を持つ偏平なリングである。2は支
柱、3は浮体、4は係留環、5は係留索である。θは迎
え角、、矢印は水流の方向である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a buoy embodying the present invention and is an explanation of the action of a ring in a water stream. Reference numeral 1 is a flat ring whose cross-sectional shape has an angle of attack toward the center. 2 is a pillar, 3 is a floating body, 4 is a mooring ring, and 5 is a mooring line. θ is the angle of attack, and the arrow is the direction of water flow.
【0010】浮標には水流による抗力Dbが働き傾斜モ
ーメントMが作用し傾斜させようとする。リング1の上
流部分は水流に対し負の迎え角となり、鉛直下向の揚力
Lこれより小さい抗力Drが働き共に浮標の傾斜を打ち
消す方向の復原モーメントとなる。またリング1の下流
部分は水流に対し正の迎え角となり上向の揚力Lとこれ
より小さい抗力Drが働き共に浮標の傾斜を打ち消す復
原モーメントとして作用する。従ってリングを適宜な寸
法に選べば、抗力は小さく復原力が大きい効率的な潮流
用姿勢安定効果が得られる。The drag D b due to the water flow acts on the buoy, and the tilt moment M acts to try to tilt it. Upstream portion of the ring 1 becomes a negative angle of attack to the water flow, the direction of the restoration moment counteracting together inclination of buoy work is lift L is smaller than this drag D r of vertical downward. The downstream portion of the ring 1 acts as a restoration moment counteract both inclination of the buoy serves small drag D r than the positive and attack angle becomes the upward lift L contrast flow. Therefore, if the ring is selected to have an appropriate size, an effective tidal current posture stabilizing effect with a small drag force and a large restoring force can be obtained.
【0011】図2は波浪に対するリングの作用説明図で
ある。波浪がある場合、浮標は重心Gを中心とし動揺す
る。リング断面の中心線の延長は迎角θを持つため重心
Gの近くを通ることになり、リングの動揺方向への投影
面積は大きく、かつ動揺の中心より一番離れた位置にあ
り、動揺の抵抗板として作用し減衰効果および付加質量
効果が生じ、動揺の抑制力は大きい。FIG. 2 is an explanatory view of the action of the ring on the waves. When there are waves, the buoy sways about the center of gravity G. Since the extension of the center line of the ring cross section has an angle of attack θ, it passes near the center of gravity G, the projected area in the wobbling direction of the ring is large, and it is located farthest from the center of the wobbling. It acts as a resistance plate and produces a damping effect and an additional mass effect, and has a great effect of suppressing shaking.
【0012】また、浮標の設置が多い浅海域では波の水
分子運動軌跡は、図2の矢印で示すように海底の影響で
水平方向に長い楕円となるため、波力の水平成分は鉛直
成分より大きくなるが、リング1は水平方向の投影面積
は少いため、波力(波強制力)は小さくなる。従ってこ
のリングは、動揺抑制力(動揺に対する抗力)は大き
く、波による動揺強制力(起揺力)の小さい効率的な姿
勢安定装置となり、浮標は潮流中でも傾かない、波浪中
でも動揺が少い安定した浮標となる。Also, in shallow water where many buoys are installed, the water molecule motion trajectory of the wave becomes an ellipse that is long in the horizontal direction due to the influence of the seabed as shown by the arrow in FIG. 2, so the horizontal component of the wave force is the vertical component. Although larger, the ring 1 has a smaller horizontal projected area, and thus the wave force (wave forcing force) is smaller. Therefore, this ring is an efficient posture stabilizer that has a large sway suppression force (drag resistance) and a small sway compulsion force (oscillation force), and the buoy does not tilt even during tidal currents and has little sway during waves. It will be a buoy.
【0013】本実施例では、リング(1)の断面は板状
としたが、図3のように断面翼状としてもよいことは勿
論である。In the present embodiment, the ring (1) has a plate-shaped cross section, but it goes without saying that it may have a blade-shaped cross section as shown in FIG.
【0014】図4〜図6は従来例の浮標の説明図で、図
4は円盤型浮標、図5は十字状抵抗板を有する浮標、図
6は短円筒状の抵抗リングを有する浮標である。4 to 6 are explanatory views of a conventional buoy, FIG. 4 is a disk type buoy, FIG. 5 is a buoy having a cross resistance plate, and FIG. 6 is a buoy having a short cylindrical resistance ring. .
【0015】[0015]
【効果】本発明の浮標を用いれば、水流中では水流によ
る浮体に働く抗力による傾斜モーメントを打ち消すよう
に作用する復原モーメントが大きく、しかも抗力が小さ
く、浮標の沈下や係留力が小さくてすみ、従って浮体は
小さく、係留装置も小形化でき、波浪中にあっては、動
揺抑制力が大きく、波による動揺強制力(起揺力)の小
さい、従って波浪中でも動揺が少い安定した浮標とな
り、航路標識用灯浮標や給餌用浮標では灯火の遠達がは
かれ、乗心持のよい、作業性のよい安定した経済的な浮
標を提供する効果がある。[Effect] When the buoy of the present invention is used, the restoring moment that acts to cancel the tilting moment due to the drag force acting on the floating body due to the water flow is large, the drag force is small, and the sinking and mooring force of the buoy is small. Therefore, the floating body is small, the mooring device can be made small, and the sway suppression force is large in the waves, and the sway force (oscillating force) due to the waves is small. The light buoys for traffic signs and feeding buoys have the effect of providing a stable and economical buoy that has a long range of lighting and is comfortable to ride on, has good workability.
【図1】本発明の1実施例の水流中における作用説明
図。FIG. 1 is an explanatory view of the action of a first embodiment of the present invention in a water stream.
【図2】本発明の1実施例の波浪中における作用説明
図。FIG. 2 is an explanatory view of the operation of the first embodiment of the present invention in waves.
【図3】リングの他の実施例の断面図。FIG. 3 is a sectional view of another embodiment of the ring.
【図4】従来例の円盤型浮標FIG. 4 Disk-type buoy of a conventional example
【図5】従来例の十字状抵抗板のある浮標。FIG. 5 is a conventional buoy with a cross-shaped resistance plate.
【図6】従来例の短円筒状抵抗リングを有する浮標。FIG. 6 is a buoy having a conventional short cylindrical resistance ring.
1 リング 2 支柱 3 浮体 4 係留環 5 係留索 θ 迎え角 Db 水流による浮標の抗力 Dr 水流によるリングの抗力又は十字状抵抗板の抗力 L 揚力 T 係留力1 Ring 2 Strut 3 Floating body 4 Mooring ring 5 Mooring line θ Angle of attack D b Drag force of buoy by water flow D r Drag force of ring or cross resistance plate by water flow L Lifting force T Mooring force
Claims (1)
なリングを浮体下方に支持したことを特徴とする浮標。1. A buoy which is characterized in that a flat ring having a cross-sectional shape having an attack angle in the central direction is supported below a floating body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP34298093A JPH08127387A (en) | 1993-12-14 | 1993-12-14 | Buoy |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP34298093A JPH08127387A (en) | 1993-12-14 | 1993-12-14 | Buoy |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH08127387A true JPH08127387A (en) | 1996-05-21 |
Family
ID=18358006
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP34298093A Pending JPH08127387A (en) | 1993-12-14 | 1993-12-14 | Buoy |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH08127387A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005206010A (en) * | 2004-01-22 | 2005-08-04 | Ihi Marine United Inc | Floating body structure |
JP2009192318A (en) * | 2008-02-13 | 2009-08-27 | Yokogawa Denshikiki Co Ltd | Float and flow rate measurement method |
KR101505781B1 (en) * | 2014-07-03 | 2015-03-26 | 포항공과대학교 산학협력단 | Position control type wave power generating apparatus |
JP2016040145A (en) * | 2014-08-12 | 2016-03-24 | 公立大学法人大阪府立大学 | Spar buoy equipped with posture stabilizer |
CN111924045A (en) * | 2020-08-18 | 2020-11-13 | 苏州金丝港智能发展股份有限公司 | Anticollision navigation buoy group |
CN114872833A (en) * | 2022-05-10 | 2022-08-09 | 中国船舶重工集团公司第七一五研究所 | Big dipper location survey wave buoy |
-
1993
- 1993-12-14 JP JP34298093A patent/JPH08127387A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005206010A (en) * | 2004-01-22 | 2005-08-04 | Ihi Marine United Inc | Floating body structure |
JP4490123B2 (en) * | 2004-01-22 | 2010-06-23 | 株式会社アイ・エイチ・アイ マリンユナイテッド | Floating structure |
JP2009192318A (en) * | 2008-02-13 | 2009-08-27 | Yokogawa Denshikiki Co Ltd | Float and flow rate measurement method |
KR101505781B1 (en) * | 2014-07-03 | 2015-03-26 | 포항공과대학교 산학협력단 | Position control type wave power generating apparatus |
US9752552B2 (en) | 2014-07-03 | 2017-09-05 | Postech Academy-Industry Foundation | Position-controlled wave power generating apparatus |
JP2016040145A (en) * | 2014-08-12 | 2016-03-24 | 公立大学法人大阪府立大学 | Spar buoy equipped with posture stabilizer |
CN111924045A (en) * | 2020-08-18 | 2020-11-13 | 苏州金丝港智能发展股份有限公司 | Anticollision navigation buoy group |
CN114872833A (en) * | 2022-05-10 | 2022-08-09 | 中国船舶重工集团公司第七一五研究所 | Big dipper location survey wave buoy |
CN114872833B (en) * | 2022-05-10 | 2024-08-13 | 中国船舶重工集团公司第七一五研究所 | Beidou positioning wave measurement buoy |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6180385B2 (en) | Spur buoy with posture stabilizer and design method thereof | |
US5168824A (en) | Foil suspended watercraft | |
JPH08127387A (en) | Buoy | |
JP6966393B2 (en) | Mooring system | |
JP2514487B2 (en) | Floating structure with legs | |
JP2002285952A (en) | Floating type foundation structure for marine wind power generation | |
JPS62292587A (en) | Underwater floating body for semi-submerged marine structure | |
US3585952A (en) | Self righting vessel | |
JP2007033359A (en) | Structure of buoy for measuring wave crest value | |
KR20190054289A (en) | Apparatus for suppression of vertical motion of net in the fishing farm | |
JPH0415184A (en) | Device for damping oscillation of spar buoy | |
JP3208544B2 (en) | Semi-submerged catamaran | |
JPS6040676Y2 (en) | Oil fence device | |
JP2020082776A (en) | Mooring system | |
TW201615489A (en) | Hydrofoil | |
JPS5920516B2 (en) | light buoy | |
JPH0631893Y2 (en) | Single point mooring floating structure | |
JPH04237694A (en) | Floating light and its buoyancy adjusting method | |
US20130277984A1 (en) | Hydrodynamic stabilization of a floating structure | |
JP3070654U (en) | Fishing float | |
JP2660678B2 (en) | Floating seawater exchange device | |
JP6727594B1 (en) | Underwater floating power generator and water current power generation system | |
JP3789626B2 (en) | Fishing underwater float | |
JPH11171086A (en) | Mooring method of floating body base isolation structure | |
JP2001211794A (en) | Float for fishing |