JPS6237174B2 - - Google Patents
Info
- Publication number
- JPS6237174B2 JPS6237174B2 JP58197878A JP19787883A JPS6237174B2 JP S6237174 B2 JPS6237174 B2 JP S6237174B2 JP 58197878 A JP58197878 A JP 58197878A JP 19787883 A JP19787883 A JP 19787883A JP S6237174 B2 JPS6237174 B2 JP S6237174B2
- Authority
- JP
- Japan
- Prior art keywords
- wave
- waves
- dissipating
- cylindrical structure
- dissipating device
- 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.)
- Expired
Links
- 230000000694 effects Effects 0.000 description 12
- 239000013535 sea water Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/06—Moles; Piers; Quays; Quay walls; Groynes; Breakwaters ; Wave dissipating walls; Quay equipment
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Revetment (AREA)
Description
【発明の詳細な説明】
この発明は海洋の波を減少させる消波装置に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wave dissipating device for reducing ocean waves.
従来の消波装置は、海洋中に連続した構造体を
配置し、構造体の複雑な機構による波浪に対する
抵抗、入射波・反射波の相殺等による消波効果を
得るようにしたものであり、構造体単体による消
波効果はあまり期待せず、またその波周期への依
存性も少なくないものであつた。 Conventional wave-dissipating devices have a continuous structure placed in the ocean, and the structure's complex mechanism provides wave-dissipating effects such as resistance to waves and cancellation of incident waves and reflected waves. We did not expect much wave-dissipating effect from the structure alone, and its dependence on the wave period was also considerable.
この発明は以上の点を考慮してなされたもの
で、構造体単体に大きな消波機能をもたせた消波
装置を提供すると共に、その配置により消波効果
の波周期への依存性を少なくすることを目的とす
る。 This invention was made in consideration of the above points, and provides a wave dissipating device in which a single structure has a large wave dissipating function, and its arrangement reduces the dependence of the wave dissipating effect on the wave period. The purpose is to
以下、この発明の内容を図面を参照して説明す
る。 Hereinafter, the content of this invention will be explained with reference to the drawings.
この発明の消波装置は、第１図、第２図に一例
を示すように、波浪の発生する海洋Ｍ中に、上下
両端が開放された円筒状構造体１を、その上端を
海面Ｐ上に出しかつその下端を海底面Ｅから若干
の距離をおいた海面Ｐ下に位置させて、直立させ
て設置したものである。 As an example of the wave dissipating device of the present invention is shown in FIGS. 1 and 2, a cylindrical structure 1 with both upper and lower ends open is placed in an ocean M where waves are generated, and the upper end is placed above the sea surface P. It is installed upright with its lower end positioned below the sea surface P at a certain distance from the seabed surface E.
そして、このように構成された消波装置によれ
ば、波がこの消波装置を通過するとき、海水が構
造体１の下端開口部から流入し、円筒状構造体１
の内部で海水が上下動し、これにより波エネルギ
が消費させられ、構造体１周囲の波が減少し、構
造体１の後側の海域が静穏に保たれるのである。 According to the wave-dissipating device configured in this manner, when waves pass through the wave-dissipating device, seawater flows in from the lower end opening of the structure 1, and the seawater flows into the cylindrical structure 1.
Seawater moves up and down inside the structure, thereby consuming wave energy, reducing waves around the structure 1, and keeping the sea area behind the structure 1 calm.
この場合、円筒状構造体１の直径Ｄ、海面Ｐ上
に出た高さh1、海面Ｐ下に没した高さh2を、卓越
周期の波（その海域において最も多く観測される
周期の波）の波長Ｌに対して次のように設定すれ
ば、円筒状構造体１内部の波高は理論上入射波高
の数数倍に達し、逆に円筒状構造体１周囲の波高
は数分の一に低減する。ここにΔｈは潮位変動量
である。 In this case, the diameter D of the cylindrical structure 1, the height h 1 above the sea surface P, and the height h 2 submerged below the sea surface P are the waves of the predominant period (the period most often observed in the sea area). If the wavelength L of the cylindrical structure 1 is set as follows, the wave height inside the cylindrical structure 1 will theoretically reach several times the incident wave height, and conversely, the wave height around the cylindrical structure 1 will be several times the incident wave height. Reduce to one. Here, Δh is the amount of tidal level fluctuation.
Ｄ／Ｌ＝0.1〜0.3 h1≧0.5H h2＝（0.5〜0.8）Ｈ＋Δｈ これは、次のような理論から導き出される。D/L=0.1-0.3 h 1 ≧0.5H h 2 = (0.5-0.8)H+Δh This is derived from the following theory.
すなわち、円筒外部と内部の流体の速度ポテン
シヤルを、その接続面上で、圧力および運動量を
保つように定めることにより内外部の水面変動を
解析すると外部の波エネルギが内部の水柱エネル
ギへの変換される状況を示すことができる。 In other words, by setting the velocity potentials of the fluids inside and outside the cylinder so as to maintain pressure and momentum on their connecting surfaces, we can analyze the fluctuations in the water level inside and outside the cylinder. be able to show the situation in which
したがつて、そのようにＤ，h1，h2の各値を設
定することにより、特に卓越周期の波に対する消
波効果が極めて高くなる。 Therefore, by setting the values of D, h 1 , and h 2 in this manner, the wave-dissipating effect particularly for waves with a dominant period becomes extremely high.
なお、上記図示例においては、円筒状構造体１
の上端には内鍔部２が形成されている。これは、
海水が円筒状構造体１内部を上昇し、あふれ出る
ときに、縮流作用によりエネルギ消費を促進させ
るためのものであり、これを設けることにより消
波効果がより高まる。また、図中３は円筒状構造
体１を所定の高さに支持するための支柱である。 Note that in the illustrated example above, the cylindrical structure 1
An inner flange portion 2 is formed at the upper end. this is,
This is to promote energy consumption by contraction action when seawater rises inside the cylindrical structure 1 and overflows, and by providing this, the wave-dissipating effect is further enhanced. Further, numeral 3 in the figure is a support for supporting the cylindrical structure 1 at a predetermined height.
次に、この発明の消波装置の設置例について簡
単に述べる。 Next, an installation example of the wave dissipating device of the present invention will be briefly described.
前述のように、この発明の消波装置によれば、
円筒状構造体１単位で十分大きな消波効果をあげ
ることができるため、消浪の必要のある特定の海
域に単独で設けてもよく、また第３図に示す如く
複数を群配置してもよい。 As mentioned above, according to the wave dissipating device of the present invention,
Since a single cylindrical structure can achieve a sufficiently large wave-dissipating effect, it can be installed singly in a specific sea area where surfing is required, or multiple cylindrical structures can be arranged in groups as shown in Figure 3. good.
第３図においては、複数の円筒状構造体１を海
岸線Ｓに平行に一列に配置した場合を示してい
る。この場合、適切な間隔で円筒状構造体１を配
置することにより、それら各構造体１単体による
消波作用に加え、それら相互の位置関係による全
体としての消波作用が働くため、極めて高い消波
効果を奏することができる。 FIG. 3 shows a case where a plurality of cylindrical structures 1 are arranged in a row parallel to the coastline S. In this case, by arranging the cylindrical structures 1 at appropriate intervals, in addition to the wave-dissipating effect of each structure 1 alone, the wave-dissipating effect as a whole is exerted due to their mutual positional relationship, resulting in an extremely high wave-dissipating effect. It can create a wave effect.
なお、第３図は一列配置の場合であるが多列に
配置してもよく、その場合一列目と二列目の円筒
状構造体の直径Ｄを変えておくことにより、消波
可能な周波数の範囲が拡大され、波浪の不規則性
に対応できる。 Although Fig. 3 shows the arrangement in one row, it may be arranged in multiple rows, and in that case, by changing the diameter D of the cylindrical structures in the first and second rows, the frequencies that can be dissipated can be adjusted. The range has been expanded to accommodate wave irregularities.
また、単独で用いる例としては、第４図に示す
ように港湾入口に設ける場合がある。港湾におい
ては、防波堤Ｔの外側で、入射波と反射波が重複
し、小型船舶の航行に支障をきたす場合がある。
したがつて、その防波堤Ｔの外側に円筒状構造体
１を設置することにより、その海域の波を減少さ
せることができ、小型船舶の航行の安全が図れ
る。 Further, as an example of using it alone, it may be installed at a port entrance as shown in FIG. In a port, incident waves and reflected waves overlap outside the breakwater T, which may impede the navigation of small vessels.
Therefore, by installing the cylindrical structure 1 outside the breakwater T, it is possible to reduce waves in the sea area, and safety of navigation of small ships can be ensured.
以上説明したように、この発明の消波装置によ
れば、構造体単体で大きな消波効果が得られるの
で、単独で用いることができる。したがつて、複
数を群配置する場合に、互いの間隔を大きくとつ
ても全体としての消波効果が低下することはな
く、コスト的にも有利となる。 As explained above, according to the wave-dissipating device of the present invention, a large wave-dissipating effect can be obtained with a single structure, so it can be used alone. Therefore, when arranging a plurality of devices in a group, even if the distance between them is increased, the overall wave-damping effect does not deteriorate, and this is advantageous in terms of cost.
第１図および第２図はそれぞれこの発明の消波
装置の側断面図および平面図、第３図および第４
図はそれぞれ同消波装置の設置例を示す平面図で
ある。
１……円筒状構造体、２……内鍔部、３……支
柱、Ｍ……海洋、Ｅ……海底面、Ｐ……海面。
FIGS. 1 and 2 are a side sectional view and a plan view, respectively, of the wave absorbing device of the present invention, and FIGS.
Each figure is a plan view showing an installation example of the same wave dissipating device. 1... Cylindrical structure, 2... Inner flange, 3... Strut, M... Ocean, E... Seabed surface, P... Sea surface.
Claims (1)
た円筒状構造体を、その上端を海面上に出しかつ
その下端を海底面から若干の距離をおいた海面下
に位置させて、直立させて設置したことを特徴と
する消波装置。1. A cylindrical structure with both upper and lower ends open is placed upright in the ocean where waves are generated, with the upper end above the sea surface and the lower end located below the sea surface at a certain distance from the seabed. A wave dissipating device characterized by having been installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58197878A JPS6088707A (en) | 1983-10-22 | 1983-10-22 | Wave-breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58197878A JPS6088707A (en) | 1983-10-22 | 1983-10-22 | Wave-breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6088707A JPS6088707A (en) | 1985-05-18 |
| JPS6237174B2 true JPS6237174B2 (en) | 1987-08-11 |
Family
ID=16381815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58197878A Granted JPS6088707A (en) | 1983-10-22 | 1983-10-22 | Wave-breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6088707A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6305877B1 (en) * | 2000-03-06 | 2001-10-23 | The United States Of America As Represented By The Secretary Of The Navy | Breakwater/attenuation device for high speed vessel wake |
-
1983
- 1983-10-22 JP JP58197878A patent/JPS6088707A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6088707A (en) | 1985-05-18 |
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