JPH10167163A - High speed boat hull - Google Patents

High speed boat hull

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Publication number
JPH10167163A
JPH10167163A JP33387896A JP33387896A JPH10167163A JP H10167163 A JPH10167163 A JP H10167163A JP 33387896 A JP33387896 A JP 33387896A JP 33387896 A JP33387896 A JP 33387896A JP H10167163 A JPH10167163 A JP H10167163A
Authority
JP
Japan
Prior art keywords
hull
bow
high speed
boat
floating structure
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.)
Granted
Application number
JP33387896A
Other languages
Japanese (ja)
Other versions
JP3294517B2 (en
Inventor
Seiichi Niwa
誠一 丹羽
Mantaro Hirayama
万太郎 平山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SUMIDAGAWA ZOSEN KK
Original Assignee
SUMIDAGAWA ZOSEN KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SUMIDAGAWA ZOSEN KK filed Critical SUMIDAGAWA ZOSEN KK
Priority to JP33387896A priority Critical patent/JP3294517B2/en
Publication of JPH10167163A publication Critical patent/JPH10167163A/en
Application granted granted Critical
Publication of JP3294517B2 publication Critical patent/JP3294517B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

PROBLEM TO BE SOLVED: To carry out stable navigation at the time of high speed by forming a hard chine type floating structure in such a way to project it frontward on a bow part under a static water level and making a surface from a chine of a floating structure to a keel work as a gliding surface as the bow part floats at the time of high speed navigation. SOLUTION: A so-called hard chine type floating structure 12 having a slender shape narrower than a main hull 11 in width and extending in the lengthy direction of the main hull 11 submerging under a water level 13 in a static state of a boat in such a way to project frontward is formed on a lower part of a bow part of the main hull 11. At the time of navigating the high speed boat hull constituted in this way, the bow part floats, a part of the floating structure 12 submerging under the static water level floats above the water level, and a slender surface from a chine 14 of the floating structure 12 to a keel 15 works as a gliding surface. As a result of holding a gliding position in this state, overall resistance of the hull is significantly reduced, and even at the time of high speed or at the time of storm navigation, it is possible to realize stable navigation.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、高速艇船体に係
り、特に高速艇に適する船首部の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hull for a high-speed boat, and more particularly to a bow structure suitable for a high-speed boat.

【０００２】[0002]

【従来の技術】従来の船舶は、図９に示されるように、
舳先１からキールライン２に向かってなだらかに傾斜す
るような側面形状の船首部を有しているが、船体抵抗改
善の余地が大きく、また半滑走状態あるいは滑走状態で
波浪中を航走する高速の船舶では、大きな波しぶきを生
じ、また縦揺れも大きく運航を制限されるという問題が
あった。2. Description of the Related Art As shown in FIG.
It has a bow with a side profile that slopes gently from the bow 1 toward the keel line 2. However, there is a lot of room for improvement of the hull resistance, and a high speed sailing in the waves in a semi-sliding state or a sliding state. There was a problem that the large number of ships generated a large wave splash and the pitching was large, and the operation was restricted.

【０００３】船体抵抗を減じる目的で、図１０〜１２に
示されるように、没水部に断面形状が楕円形または円形
の球状部３を前方に突出して形成した、いわゆる球状船
首構造の使用が知られている。これは、航走中の船首付
近の圧力分布を変えることによって造波抵抗を減じよう
とするものである。しかしながら、この球状船首構造
は、球状部３が常時水面下に位置するように非滑走状態
で航走する大型船の計画状態計画速力においては有効で
あるものの、半滑走状態あるいは滑走状態で航走する高
速艇に球状船首構造を採用すると、もはや上記のような
有利な条件は存在せず、球状部３が水面より上に浮上す
るためにかえって造波抵抗が大きくなってしまうし、大
きな飛沫を発生して操船の妨害を生ずることさえある。In order to reduce the resistance of the hull, as shown in FIGS. 10 to 12, a so-called spherical bow structure in which a spherical part 3 having an elliptical or circular cross section protrudes forward from a submerged part has been used. Are known. This is to reduce the wave-making resistance by changing the pressure distribution near the bow while sailing. However, although this spherical bow structure is effective at the planned speed of a large ship that sails in a non-sliding state so that the spherical portion 3 is always below the water surface, it sails in a semi-sliding state or a sliding state. If a high-speed boat adopts a spherical bow structure, the advantageous conditions described above no longer exist, and the spherical part 3 floats above the water surface, which increases the wave-making resistance and generates large droplets. And may even interfere with maneuvering.

【０００４】[0004]

【発明が解決しようとする課題】このように、従来の船
舶は、半滑走状態あるいは滑走状態における船体抵抗改
善の余地が大きく、また波浪中では安定した高速航走を
することが困難であるという問題点があった。本発明は
このような問題点を解消するためになされたもので、高
速時であっても安定した航走を行うことができる高速艇
船体を提供することを目的とする。As described above, the conventional ship has a large room for improving the hull resistance in a semi-sliding state or a sliding state, and it is difficult to perform a stable high-speed sailing in waves. There was a problem. The present invention has been made to solve such a problem, and an object of the present invention is to provide a high-speed boat hull capable of performing stable sailing even at high speed.

【０００５】[0005]

【課題を解決するための手段】本発明に係る高速艇船体
は、静止水面下の船首部分に前方に突出するようにハー
ドチャイン型の浮舟構造物が形成され、高速航走時には
船首部分が浮上して浮舟構造物のチャインからキールに
至る面が滑走面として作用するものである。高速艇が双
胴を有して、そのそれぞれの船首部分に浮舟構造物を備
えることもできる。また、高速艇が多胴を有し、多胴の
うちの一部の船首部分に浮舟構造物を備えることもでき
る。In the hull of the high-speed boat according to the present invention, a hard-chine type floating boat structure is formed so as to protrude forward at a bow portion below the stationary water surface, and the bow portion floats during high-speed cruising. The surface from the chine to the keel of the floating boat structure acts as a gliding surface. It is also possible that the high-speed boat has a catamaran and has a floating structure at each of its bows. Further, the high-speed boat may have a multi-hull, and a part of the multi-hull may be provided with a floating structure at a bow portion.

【０００６】[0006]

【発明の実施の形態】以下、本発明の実施の形態を添付
図面に基づいて説明する。図１〜３に本発明の実施の形
態に係る高速艇船体の船首部を示す。高速艇船体は、図
９に示した従来の船舶とほぼ同様の船型を有する主船体
１１を有し、この主船体１１の船首部分の下部に前方に
突出するように浮舟構造物１２が形成されている。浮舟
構造物１２は、艇の静止状態における水面１３の下に没
水しており、主船体１１より狭い幅で主船体１１の長さ
方向に延びる細長い形状を有している。また、浮舟構造
物１２は、いわゆるハードチャイン型の浮舟であって、
その側部には従来の船体側部に採用されているものと同
様のチャイン１４が形成されている。Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 show the bow of a high-speed boat hull according to an embodiment of the present invention. The high-speed boat hull has a main hull 11 having substantially the same hull form as the conventional boat shown in FIG. 9, and a floating boat structure 12 is formed at a lower part of a bow portion of the main hull 11 so as to protrude forward. I have. The floating boat structure 12 is submerged under the water surface 13 when the boat is at rest, and has an elongated shape that is narrower than the main hull 11 and extends in the length direction of the main hull 11. The floating boat structure 12 is a so-called hard chin floating boat,
On its side, a chine 14 similar to that employed in the conventional hull side is formed.

【０００７】図４及び図５に、それぞれ高速艇船体の詳
細な断面形状を示す。図４における船体の幅方向の切断
面ａ〜ｉによる船体の正面断面形状が図５にＡ〜Ｉで示
され、同様に図５における船体の長さ方向の切断面ｊ〜
ｐによる船体の側面断面形状が図４にＪ〜Ｐで示されて
いる。なお、図５には、比較のため、図９に示した従来
の船体の正面断面形状が点線で示されている。FIGS. 4 and 5 show detailed sectional shapes of the hull of the high-speed boat, respectively. The front cross-sectional shapes of the hull along the cross-sections a to i in the width direction of the hull in FIG. 4 are indicated by A to I in FIG. 5, and similarly, the cross-sections j to j in the length direction of the hull in FIG.
The side cross-sectional shape of the hull by p is shown by JP in FIG. In FIG. 5, for comparison, the front sectional shape of the conventional hull shown in FIG. 9 is indicated by a dotted line.

【０００８】次に、この実施の形態に係る高速艇船体の
航走時の作用について説明する。艇が航走すると、その
速力に応じて船首部分が浮上する。これにより、高速時
においては、静止水面下に没していた浮舟構造物１２の
一部が水面の上に浮上し、浮舟構造物１２のチャイン１
４からキール１５に至る細長い面が滑走面として作用し
て、この状態で滑走姿勢が保持される。その結果、船体
の全抵抗が著しく減少する。Next, the operation of the high-speed boat hull according to this embodiment at the time of traveling will be described. As the boat sails, the bow rises according to its speed. Thereby, at the time of high speed, a part of the floating boat structure 12 submerged under the stationary water surface floats above the water surface, and the chine 1 of the floating boat structure 12
An elongated surface from 4 to the keel 15 acts as a sliding surface, and the sliding posture is maintained in this state. As a result, the overall resistance of the hull is significantly reduced.

【０００９】図１〜５に示した本発明の船体と図９に示
した従来の船首部形状を有する船体とについて、水線長
３３．５０ｍ、排水量１１０トンの船の縮尺１／１５の
模型をそれぞれ作成して水槽実験を行った。これら両者
の船体は、図４における切断面ｈより前方、すなわち水
線長の１５％に相当する最前部の静止水面下の形状が異
なるのみで、その他は同一の形状を有している。このよ
うな模型船体を水槽内で航走させて速力Ｆｎに対する船
首浮上量ｄｉｐ及び全抵抗値Ｒｍを計測したところ、図
６のような結果が得られた。速力Ｆｎは、実速度ｖ［ｍ
／ｓ］、水線長Ｌ［ｍ］、重力加速度ｇ［ｍ／ｓ2］を
用いて、Ｆｎ＝ｖ／（ｇ・Ｌ）1/2で表され、例えばＦ
ｎ＝０．８２６が３０ノットに相当している。また、船
首浮上量ｄｉｐとしては、図４における切断面ｃにおけ
る浮上量が計測されている。The hull of the present invention shown in FIGS. 1 to 5 and the hull having the conventional bow shape shown in FIG. 9 are scaled 1/15 scale of a ship having a water line length of 33.50 m and a displacement of 110 tons. Were prepared, and an aquarium experiment was performed. These two hulls have the same shape except for the shape in front of the cut surface h in FIG. 4, that is, the shape under the foremost stationary water surface corresponding to 15% of the water line length. When such a model hull was made to sail in a water tank and the bow floating amount dip and the total resistance Rm with respect to the speed Fn were measured, the results as shown in FIG. 6 were obtained. The speed Fn is the actual speed v [m
/ S], water line length L [m], and gravitational acceleration g [m / s 2 ], expressed as Fn = v / (g · L) 1/2 , for example, F
n = 0.826 corresponds to 30 knots. Further, as the bow floating amount dip, the floating amount at the cut surface c in FIG. 4 is measured.

【００１０】図６からわかるように、速力が同一の場
合、本発明の船体では、従来の船体に比べて船首浮上量
が少なく（これは正しい姿勢で航走していることを意味
する）、全抵抗が小さくなっている。例えば、Ｆｎ＝
０．８５２（３０ノット）における模型船体の全抵抗
は、従来の船体が４．１５Ｋｇであるのに対して本発明
の船体は３．７５Ｋｇであり、従来の９０．４％まで減
少している。これを水線長３３．５０ｍ、排水量１１０
トンの実船の大きさに換算して有効馬力ＥＨＰの比較を
行った結果を図７に示す。低速から高速に至る広い速力
範囲で本発明の船体の方が従来の船体より有効馬力が小
さくなっており、例えばＦｎ＝０．８５２において、従
来の船体が２２６５Ｐｓであるのに対して本発明の船体
は２０００Ｐｓと約８８％にまで減少している。As can be seen from FIG. 6, when the speed is the same, the hull of the present invention has a smaller head floating amount than the conventional hull (this means that the ship is sailing in the correct posture). Total resistance is low. For example, Fn =
The total resistance of the model hull at 0.852 (30 knots) is 4.15 Kg for the conventional hull while 3.75 Kg for the hull of the present invention, which is reduced to 90.4% of the conventional hull. . The water line length is 33.50m and the drainage amount is 110
FIG. 7 shows the results of comparison of the effective horsepower EHP in terms of the size of an actual tonnage ship. The hull of the present invention has a smaller effective horsepower than the conventional hull in a wide speed range from low speed to high speed. For example, at Fn = 0.852, the conventional hull has 2265 Ps, whereas the conventional hull has 2265 Ps. The hull has been reduced to about 2000% at 2000Ps.

【００１１】さらに、模型船体を航走させてそれぞれの
縦揺れの度合いを測定した結果を図８に示す。図８にお
いて、横軸は船体の水線長Ｌに対する波浪の波長λの比
λ／Ｌを示し、縦軸は縦揺係数ｋを示している。縦揺係
数ｋはその値が大きいほど、縦揺れの度合いが大きいこ
とを表している。図８からわかるように、各波長に対し
て本発明の船体の方が従来の船体より縦揺れが少なく、
乗り心地に優れている。これは、本発明の船体において
は、浮舟構造物の幅の狭い滑走面が波浪の衝撃を受ける
ために衝撃による最大加速度が小さくなり、また反跳に
あたっては浮舟構造物が抵抗して反跳高さを小さく抑
え、これにより衝撃エネルギーを小さくしているからで
ある。従って、荒天航行時であっても波浪衝撃を緩和し
て安定した航走を行うことができる。FIG. 8 shows the results of measuring the degree of pitching of each of the model hulls while the model hull was running. In FIG. 8, the horizontal axis represents the ratio λ / L of the wavelength of the wave to the water line length L of the hull, and the vertical axis represents the pitch coefficient k. The higher the value of the pitch coefficient k, the greater the degree of pitch. As can be seen from FIG. 8, the hull of the present invention has less pitching for each wavelength than the conventional hull,
Excellent ride comfort. This is because, in the hull of the present invention, the maximum acceleration due to the impact is reduced because the narrow running surface of the floating structure receives the impact of waves, and the floating structure resists the recoil, and the recoil height is increased. Is kept small, thereby reducing the impact energy. Therefore, even during rough weather navigation, it is possible to mitigate the wave impact and perform stable voyage.

【００１２】このように、ハードチャイン型の浮舟構造
物を船首部分に設けることにより、広い速力範囲で船体
抵抗を減少させて有効馬力及び縦揺れを小さく抑えるこ
とができる。As described above, by providing a hard-chine type floating boat structure at the bow portion, the hull resistance can be reduced over a wide speed range, and the effective horsepower and pitching can be suppressed to a small value.

【００１３】なお、図１に示した船体においては、浮舟
構造物１２の全てが静止水面１３の下に没水している
が、これに限るものではなく、浮舟構造物１２の一部が
静止水面１３の上に露出していてもよい。In the hull shown in FIG. 1, all of the floating boat structure 12 is submerged under the stationary water surface 13, but the present invention is not limited to this. It may be exposed on the water surface 13.

【００１４】また、上記の実施の形態においては、図１
〜５に示したような単胴の船体について説明したが、双
胴船体のそれぞれの船首部分に浮舟構造物を備えても同
様の効果が得られる。さらに、多胴船体のうちの一部の
船首部分に浮舟構造物を設けることもできる。Further, in the above embodiment, FIG.
Although a single-hull hull as shown in FIGS. 1 to 5 has been described, a similar effect can be obtained by providing a floating structure at each bow of the catamaran hull. Further, a floating structure may be provided at a part of the bow of the multihull.

【００１５】[0015]

【発明の効果】以上説明したように、この発明によれ
ば、低速から高速に至る広い速力範囲で船体抵抗を減少
させることができ、高速時であっても、また荒天航行時
であっても安定した航走を実現することが可能となる。As described above, according to the present invention, the hull resistance can be reduced in a wide speed range from a low speed to a high speed. Stable sailing can be realized.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の実施の形態に係る高速艇船体の船首部
を示す側面図である。FIG. 1 is a side view showing a bow of a high-speed boat hull according to an embodiment of the present invention.

【図２】図１の船首部を示す底面図である。FIG. 2 is a bottom view showing the bow of FIG. 1;

【図３】図１の船首部を示す正面図である。FIG. 3 is a front view showing a bow of FIG. 1;

【図４】図１の船首部の側面断面形状を示す図である。FIG. 4 is a view showing a side cross-sectional shape of a bow of FIG. 1;

【図５】図１の船首部の正面断面形状を示す図である。FIG. 5 is a diagram showing a front cross-sectional shape of a bow of FIG. 1;

【図６】本発明に係る船体模型及び従来の船体模型を用
いて計測した速力Ｆｎに対する船首浮上量ｄｉｐ及び全
抵抗値Ｒｍを示す図である。FIG. 6 is a diagram showing a bow flying height dip and a total resistance value Rm with respect to a speed Fn measured using a hull model according to the present invention and a conventional hull model.

【図７】図６の結果から換算した実船の有効馬力ＥＨＰ
を示す図である。FIG. 7 shows the effective horsepower EHP of the actual ship converted from the results of FIG.
FIG.

【図８】本発明に係る船体模型及び従来の船体模型を用
いて計測した縦揺係数ｋを示す図である。FIG. 8 is a view showing a pitch coefficient k measured using a hull model according to the present invention and a conventional hull model.

【図９】従来の船舶の船首部を示す側面図である。FIG. 9 is a side view showing a bow of a conventional ship.

【図１０】従来の他の船舶の船首部を示す側面図であ
る。FIG. 10 is a side view showing a bow of another conventional ship.

【図１１】図１０の船首部を示す底面図である。FIG. 11 is a bottom view showing the bow of FIG. 10;

【図１２】図１０の船首部を示す正面図である。FIG. 12 is a front view showing the bow of FIG. 10;

【符号の説明】[Explanation of symbols]

１１ 主船体 １２ 浮舟構造物 １３ 水面 １４ チャイン １５ キール 11 Main Hull 12 Floating Structure 13 Water Surface 14 Chine 15 Keel

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 静止水面下の船首部分に前方に突出する
ように形成されたハードチャイン型の浮舟構造物を備
え、高速航走時に船首部分が浮上して浮舟構造物のチャ
インからキールに至る面が滑走面として作用することを
特徴とする高速艇船体。A hard-chine type floating boat structure formed so as to protrude forward at a bow portion below a stationary water surface, and the bow portion floats up at high speed traveling from the chine to the keel of the floating boat structure. A high speed boat hull characterized in that the surface acts as a planing surface. 【請求項２】 双胴を有すると共に双胴のそれぞれの船
首部分に前記浮舟構造物を備えたことを特徴とする請求
項１に記載の高速艇船体。2. The high-speed boat hull according to claim 1, wherein the hull has a catamaran and the floating structure is provided at each bow portion of the catamaran. 【請求項３】 多胴を有すると共に多胴のうちの一部の
船首部分に前記浮舟構造物を備えたことを特徴とする請
求項１に記載の高速艇船体。3. The high-speed boat hull according to claim 1, wherein the hull has a multi-hull, and the floating structure is provided at a part of a bow of the multi-hull.
JP33387896A 1996-12-13 1996-12-13 High-speed boat hull Expired - Lifetime JP3294517B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33387896A JP3294517B2 (en) 1996-12-13 1996-12-13 High-speed boat hull

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33387896A JP3294517B2 (en) 1996-12-13 1996-12-13 High-speed boat hull

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JP3294517B2 JP3294517B2 (en) 2002-06-24

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KR20170096052A (en) * 2014-12-22 2017-08-23 라스무쎈 마리타임 디자인 아에스 Design of the front of ship

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KR102573611B1 (en) * 2021-09-29 2023-09-01 유한회사 케이조선앤특수선 Bulbous bow part for reducing wave resistance of ships

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170096052A (en) * 2014-12-22 2017-08-23 라스무쎈 마리타임 디자인 아에스 Design of the front of ship

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