JPH0218191A - Catamarran with hydrofoil - Google Patents

Abstract

PURPOSE:To enable ordinary operation to be carried out even in a high sea by arranging a plurality of hydrofoils at least in the longitudinal front and rear positions of a hull in the vicinity of the ship's bottom of the hull part, and providing a difference in the lift slope to the change of water inlet angle by blade profiles to respective hydrofoils on the bow side and the stern side. CONSTITUTION:Supporting pillars 3 are provided to the ship's bottom in the longitudinal front and rear positions of the hulls 1, 1 of a catamarran, and on the lowee ends thereof, hydrofiols 4, 4', which continuously extend horizontally in the direction perpendicular to the above longitudinal direction and each of which has a cross-section of blade profile t produce a lift, are arranged. And a hydrofoil whose lift slope to the change of water inlet angle has been made larger than that of the hydrofoil 4 positioned on the bow 5 side by the selection of blade profiles, is arranged for the hydrofoil 4' positioned on the stern 6 side. Thus, since the hull is floated up by the lift of hydrofoils 4, 4' at the time of sailing, comparing with the ship in which hydrofoils 4, 4' are not equipped, the freeboard of the tunnel part 2 becomes larger, and the possibility that the waves hit the inner undersurface of the hull in the tunnel part 2 is reduced, enabling stable ordinary operation to be carried out, even in a high sea.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、水中翼付双胴船に関するものである。[Detailed description of the invention] [Industrial application field] The present invention relates to a hydrofoil catamaran.

［従来の技術］ 従来の双胴船は、第９図及び第１Ｏ図に示すように略同
じ形状の２個の船体部ｌをある間隔において並列し、両
開体部ｌの甲板部分で連結して構成されており、甲板を
広くとることができ、横方向に安定し、更に両開体部ｌ
が起こす波を互いに干渉させて造波抵抗を減少させるこ
とができるという利点がある。[Prior Art] As shown in Fig. 9 and Fig. 1O, a conventional catamaran has two hull parts l of approximately the same shape arranged in parallel at a certain distance, and connected at the deck part of both open hull parts l. It is constructed with a wide deck, is stable in the lateral direction, and has both open body parts l.
This has the advantage that the waves generated by the waves can interfere with each other, thereby reducing wave-making resistance.

［発明が解決しようとする課題］ しかしながら、従来の双胴船は、大波浪中を航走する場
合、波が両開体部１間に形成されたトンネル部２内船体
下面を頻繁に打つと、その衝撃で通常の航行ができなく
なるという問題があった。[Problems to be Solved by the Invention] However, when a conventional catamaran sails in large waves, waves frequently hit the lower surface of the hull in the tunnel section 2 formed between both open body sections 1. The problem was that the impact made normal navigation impossible.

又、双胴船の船体部ｌを形成する６胴は長手方向には細
長い単胴船と同様であるので波浪中ではピッチ、ヒープ
運動が大きく乗り心地が悪かった。Furthermore, since the six hulls forming the hull section l of the catamaran are long and narrow in the longitudinal direction, similar to those of a monohull, the pitch and heap motions are large in waves, making the ride uncomfortable.

本発明は、上記実情に鑑み、大波浪中においても安定し
た通常の運航が可能で、且つピッチ、ヒープ運動の小さ
い水中翼付双胴船を提供することを目的としてなしたも
のである。The present invention has been made in view of the above-mentioned circumstances, with the object of providing a hydrofoil-equipped catamaran that is capable of stable normal operation even in large waves and has small pitch and heap motions.

［課題を解決するための手段］ 本発明は、船体部の船底近傍における少なくとも船体部
長手方向前後位置に、前記長手方向と略直角方向に延び
断面が略翼形状をなして揚力を生じるようにした複数の
水中翼を配設し、船首側に位置した前記水中翼と船尾側
に位置した前記水中翼とに、翼形状により水の流入角の
変化に対する揚力傾斜の差をもたせたことを特徴とする
ものである。[Means for Solving the Problems] The present invention provides a structure that extends in a direction substantially perpendicular to the longitudinal direction and has a substantially wing-shaped cross section to generate lift at least at longitudinal positions in the longitudinal direction of the hull in the vicinity of the bottom of the hull. A plurality of hydrofoils are arranged, and the hydrofoils located on the bow side and the hydrofoils located on the stern side are provided with a difference in lift force inclination with respect to changes in water inflow angle depending on the shape of the wing. That is.

［作　　　用］ 水中翼の揚力により船体が浮上して船体部間のトンネル
部内船体下面の波打ち現象が減少し、前後の各水中翼の
翼形状を異ならせることで揚力傾斜に差をもたせたこと
により船体を自己安定化してピッチ、ヒープ運動を減少
させ、波浪中でも通常航行を可能にすると共に乗り心地
を良くする。[Function] The hull rises due to the lifting force of the hydrofoils, reducing the waving phenomenon on the underside of the hull in the tunnel between the hull sections, and by making the front and rear hydrofoils have different blade shapes, a difference in lift slope is created. This self-stabilizes the hull, reduces pitch and heap motion, enables normal navigation even in waves, and improves riding comfort.

［実　施　例］ 以下本発明の実施例を添付図面を参照しつつ説明する。[Example] Embodiments of the present invention will be described below with reference to the accompanying drawings.

第１図及び第２図は本発明の一実施例を示し、双胴船船
体部１．１の長手方向前後部の船底下に、下方に突出し
た支持柱３を設け、該支持柱３の下端に、前記長手方向
と直角方向に水平に連続して延び断面が翼形状を有して
揚力を生じるようにした水中翼４．４°を配設し、又、
該前後の水中翼４，４°の中、船首５側に位置した水中
翼４よりも船尾θ側に位置した水中翼４°の方を翼形状
の選定によって水の流入角の変化に対して揚力傾斜を大
きくしたものを配設する。−例として、前方間４は円弧
翼断面で後方翼４°は航空機翼断面のものを用いたり、
又翼の縦横比を変えることでこの目的を達成できる。1 and 2 show an embodiment of the present invention, in which a support column 3 protruding downward is provided under the bottom of the front and rear portions of the catamaran hull 1.1 in the longitudinal direction. At the lower end, a 4.4° hydrofoil is disposed that extends horizontally in a direction perpendicular to the longitudinal direction and has a wing-shaped cross section to generate lift, and
Among the front and rear hydrofoils 4, 4°, the 4° hydrofoil located on the stern θ side is more sensitive to changes in the water inflow angle by selecting the wing shape than the hydrofoil 4 located on the bow 5 side. Install one with a large lift slope. - For example, the front wing 4 is an arcuate wing cross section and the rear wing 4° is an aircraft wing cross section,
This objective can also be achieved by changing the aspect ratio of the wing.

水中翼４．４°を装備することにより、航走時に水中翼
４．４°の揚力により船体が浮上するために、水中ｇ４
．４’を装備していない船に比べてトンネル部２の乾舷
が大きくなるので大波浪中でも波がトンネル部２内船体
下面を打つ確率が小さくなり安定した通常航行を可能に
する。By being equipped with 4.4° hydrofoils, the hull floats up due to the lift of the 4.4° hydrofoils when sailing, so underwater G4
．． Since the freeboard of the tunnel section 2 is larger than that of a ship not equipped with 4', the probability of waves hitting the lower surface of the hull inside the tunnel section 2 is reduced even during large waves, making stable normal navigation possible.

又、各水中翼４．４°の揚力傾斜に差をもたせることに
より、定常航走時の状態の場合には、第７図及び第８図
（イ）（０）に示すように流入角に対して船首５側及び
船尾６側水中翼４，４°でもって船体を定常航走状態に
保つが、何らかの原因で船が第８図（Ａ＞のように定常
航走状態より船尾トリムを生じたとすると、第８図に）
のように水中翼への水の流入角が大きくなるが、第７図
に示すように船尾６側水中翼４°の方が船首５側水中翼
４よりも大きな揚力を生じるために船尾６を持ち上げる
方向に回転モーメントが生じ船を元の姿勢に復原させる
。In addition, by creating a difference in lift inclination of 4.4° for each hydrofoil, the inflow angle is adjusted as shown in Figures 7 and 8 (A) (0) in the case of steady cruising conditions. On the other hand, the ship is kept in a steady running state by using the 4.4 degree hydrofoils on the bow 5 side and the stern 6 side, but for some reason the ship trims the stern from the steady sailing state as shown in Figure 8 (A>). If so, in Figure 8)
As shown in FIG. A rotational moment is generated in the lifting direction, causing the ship to return to its original position.

逆に、第８図（ホ）のように船首トリムを生じたとする
と、第８図ぐ＼）のように水中翼への水の流入角が小さ
くなるが、第７図に示すように船首５側水中翼４の方が
船尾６側水中翼４°よりも大きな揚力を生じて船首５を
持ち上げる方向に回転モーメントが生じ船を元の姿勢に
復原させる。On the other hand, if the bow trim occurs as shown in Figure 8 (e), the inflow angle of water to the hydrofoil will become smaller as shown in Figure 8 (g\), but the bow 5 trim as shown in Figure 7 will decrease. The side hydrofoils 4 generate a larger lifting force than the stern 6 side hydrofoils 4°, and a rotational moment is generated in the direction of lifting the bow 5, thereby restoring the ship to its original attitude.

従って、船体はトリムに対し自己安定的特性を示し、波
浪中でもピッチング運動が減少し、更に水中翼４，４°
が船体運動に対し抵抗しダンピングの役目を果たすので
ピッチ、ヒープ等の運動も減少し乗り心地が改善される
。Therefore, the hull exhibits self-stabilizing properties with respect to trim, pitching motion is reduced even in waves, and hydrofoils 4,4°
Since it acts as a damper by resisting the hull motion, motions such as pitch and heap are also reduced, improving ride comfort.

第３図及び第４図は本発明の他の実施例を示し、水中翼
７．７°を各船体部ｌの船底近傍に船の長手方向と略直
角方向両側に突設したものである。FIGS. 3 and 4 show another embodiment of the present invention, in which hydrofoils of 7.7° are protruded from each hull portion 1 near the bottom on both sides in a direction substantially perpendicular to the longitudinal direction of the ship.

又、第５図及び第６図は本発明の更に他の実施例を示し
、水中翼８，８°を、各船体部ｌの船底下にそれぞれ下
方に突設した支持柱９に、船の長手方向と略直角方向両
側に突設したものである。Further, FIGS. 5 and 6 show still another embodiment of the present invention, in which hydrofoils 8 and 8° are attached to support columns 9 that project downward under the bottom of each hull section l, respectively. It protrudes from both sides in a direction substantially perpendicular to the longitudinal direction.

上記各実施例共前述の実施例と同様に、水中翼７．７°
、８，８°は船の長手方向に沿い、船首５側よりも船尾
６側の方を水の流入角の変化に対して揚力傾斜を大きく
したものが配設されており、安定した通常航走を可能に
すると共に船体をトリムに対して自己安定的に保持させ
ピッチ、ヒープ等の運動を減少させて乗り心地を改善さ
せる。In each of the above embodiments, the hydrofoil is 7.7° as in the previous embodiment.
, 8, 8° is along the longitudinal direction of the ship, and the lift slope is larger on the stern 6 side than on the bow 5 side in response to changes in the water inflow angle, and this ensures stable normal navigation. This enables the hull to maintain its self-stability relative to the trim, thereby reducing motions such as pitch and heap, thereby improving riding comfort.

なお、本発明の他の実施例の第４図及び第６図に示した
水中翼７．７°、８，８°は両側船体部ｌの内側部のみ
設けたり、又内側を連続させるなどして外側には突設さ
せないようにしてもよく、更に水中翼を３ケ所以上設け
るようにしてもよく、その他本発明の要旨を逸脱しない
範囲内で種々変更を加え得ることは勿論である。Note that the hydrofoils 7.7°, 8, and 8° shown in FIGS. 4 and 6 in other embodiments of the present invention may be provided only on the inner sides of the hull portions 1 on both sides, or may be continuous on the inner sides. Of course, the hydrofoils may not be provided protruding outwardly, or the hydrofoils may be provided at three or more locations, and various other changes may be made without departing from the gist of the present invention.

［発明の効果］ 本発明の水中翼付双胴船によれば、大波浪中でも安定し
た通常の運航を可能にし、ピッチ、ヒープ運動を減少さ
せて乗り心地が向上する等積々の優れた効果を奏し得る
。[Effects of the Invention] The hydrofoil-equipped catamaran of the present invention has many excellent effects, such as enabling stable normal operation even in large waves, and improving ride comfort by reducing pitch and heap movements. can be played.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例の説明図、第２図は第１図の
Ａ−Ａ矢視図、第３図は本発明の他の実施例の説明図、
第４図は第３図のＢ−Ｂ矢視図、第５図は本発明の更に
他の実施例の説明図、第６図は第５図のＣ−Ｃ矢視図、
第７図は各水中翼の流入角に対する揚力の関係図、第８
図０）（ロ）は定常航走状態の場合の説明図、第８図１
／Ｌ）＜−）は船尾トリムの場合の説明図、第８図（ホ
）（へ）は船首トリムの場合の説明図、第９図は従来の
双胴船の説明図、第１Ｏ図は第９図のＤ−Ｄ矢視図であ
る。 図中１は船体部、４，４°、７，７°、８．８°は水中
翼、５は船首、６は船尾を示す。FIG. 1 is an explanatory diagram of one embodiment of the present invention, FIG. 2 is a view taken along the line A-A in FIG. 1, and FIG. 3 is an explanatory diagram of another embodiment of the present invention.
FIG. 4 is a view taken along the line B-B in FIG. 3, FIG. 5 is an explanatory diagram of still another embodiment of the present invention, and FIG. 6 is a view taken along the line C-C in FIG.
Figure 7 is a diagram of the relationship between the lift force and the inflow angle of each hydrofoil, and Figure 8
Figure 0) (b) is an explanatory diagram for the case of steady sailing condition, Figure 8 1
/L)<-) is an explanatory diagram for the stern trim, Figures 8 (e) and (f) are explanatory diagrams for the bow trim, Figure 9 is an explanatory diagram of a conventional catamaran, and Figure 1O is an explanatory diagram for the bow trim. FIG. 9 is a view taken along the line DD in FIG. 9; In the figure, 1 indicates the hull, 4, 4°, 7, 7°, and 8.8° indicate hydrofoils, 5 indicates the bow, and 6 indicates the stern.

Claims (1)

【特許請求の範囲】[Claims] １）船体部の船底近傍における少なくとも船体部長手方
向前後位置に、前記長手方向と略直角方向に延び断面が
略翼形状をなして揚力を生じるようにした複数の水中翼
を配設し、船首側に位置した前記水中翼と船尾側に位置
した前記水中翼とに、翼形状により水の流入角の変化に
対する揚力傾斜の差をもたせたことを特徴とする水中翼
付双胴船。1) A plurality of hydrofoils extending in a direction substantially perpendicular to the longitudinal direction and having a substantially wing-shaped cross section to generate lift are disposed near the bottom of the hull at least in front and rear positions in the longitudinal direction of the hull. A catamaran with hydrofoils, characterized in that the hydrofoils located on the sides and the hydrofoils located on the stern side are provided with a difference in lifting force inclination with respect to changes in water inflow angle depending on the shape of the wings.