KR20170134311A - Vessel - Google Patents

Abstract

s=tan­¹[0.5×B/{(1-Cpf)×Lpp}](degree)로 계산되는 각도(

s)로 계산되는 각도

s를, 한쪽 현측의 선수부의 기준 선수각도(

s)로 하고, 이 기준 선수각도(

s)에 대해서 「0＜Rs＜

s+15°」의 범위를 특정 선수각도범위(Rs)로 했을 때에, 선수각도(

)가 연속해서 특정 선수각도범위(Rs) 내에 들어가는 선수부의 특정 상하범위(Ra)가, 만재흘수선(Df)에 일치하는 제 1 하한위치(Ha1)로부터, 만재흘수선(Df)보다도 기준 수두높이(△HS)만큼 높은 제 1 상한위치(Hb1)까지의 제 1 범위(R1)를 포함하여 구성된다. 이것에 의해, 경하흘수로부터 만재흘수까지 전부의 흘수에 있어서 선수조파저항을 작게 한다. In the water-displacement type ship 1 having the spherical bow 5 below the light water line Db,

s = tan [0.5 × B / {(1-Cpf) × Lpp}] (degrees)

s)

s, the reference bow angle of the bow of one side

s), and the reference player angle (

s " 0 < Rs <

s + 15 ° "is defined as a specific bow angle range (Rs), the bow angle (

(Ra) of the forefront portion in which the predetermined upper limit (Ra) of the bow portion in which the predetermined upper limit (Ra) falls within the specific bow angle range Rs is greater than the reference lowered head And a first range R1 up to a first upper limit position Hb1 as high as the first upper limit position Hb1. This reduces the ripple resistance at all drafts from light draft to load draft.

Description

Ship {VESSEL}

The present invention relates to a ship and a ship designing method having a bow shape capable of reducing the bow wave resistance at all drafts from light draft to load draft.

In the displacement type ship, the shape near the front end of the bow, that is, the bow shape, is a shape having a small fusing resistance in order to reduce the energy required for propelling the ship.

When the bow shape is large, the water flowing into the bow is likely to be clogged when the ship moves forward, and the water surface rises due to dynamic pressure, so that a large surface wave is generated and the wave resistance becomes large. In addition, in the wave, the incident wave (incident wave) is remarkably reflected forward, inviting a large resistance increase. Therefore, with respect to the shape of the bow of the ship, the vicinity of the load line and the shape below it are designed so that the vicinity of the fore end of the bow is not too large except for the spherical bow portion.

On the other hand, above the load line, it is required that water is prevented from reaching the exposed deck even in the wave from the viewpoint of prevention of corroded water by the wave, safety deck of the personnel, and prevention of damage to the equipment and cargo on the deck. In addition, the width of the exposed deck is required to be somewhat wide from the viewpoint of arrangement of the mooring machine.

1,

2)가 열려서 예각에서부터 둔각이 되는 형상을 하고 있다. 이 선수각도(

)는, 도 6에서 나타내듯이 워터라인(Lz)과 선체중심선(C. L)이 교차하는 선수부 선단부에서부터 선장(船長)방향에 1m 후방의 부위에서의 워터라인(Lz)의 접선(Lt)과 선체중심선(C.L.)이 이루는 각도로 정의된다.Therefore, in the ship 1X of the prior art shown in Fig. 2 and the prior art ship 1X shown in Fig. 7, the degree to which the draft becomes deeper at the bow portion, that is, the degree to which the hull is submerged and the water surface WL relatively rises. The water lines Lz1 and Lz2 representing the horizontal cross-sectional shape of the water line

One,

2) is opened and forms an obtuse angle from an acute angle. This player angle

The tangent line Lt of the water line Lz at a portion rearward 1 m in the direction of the captain from the leading end portion of the bow portion where the water line Lz and the ship center line C. L intersect with each other as shown in Fig. Is defined as the angle formed by the ship center line (CL).

In addition, when the ship is stopped, the water flow that flows from the front is blocked at the tip end, so the water surface rises by the head pressure (dynamic pressure) at the bow. Therefore, since the water surface of the athlete at the time of Hangzhou becomes higher than the draft at the time of stopping, the bow angle of the water line of the bow portion of the ship in which water actually flows is also an obtuse angle.

As a result, the deeper the draft, the larger the wave generated at the forefront and the greater the wave resistance.

As one of countermeasures against the increase in the ripple resistance, for example, as disclosed in Japanese Patent Application Laid-Open No. 2000-142553, the profile of the fore end is sloped forward from the maximum waterline in the forward direction, and the vicinity of the front end of the water line above the maximum waterline A non-presidential election with an acute angle has been proposed. Also, as described in Japanese Patent Application Laid-Open No. 2000-335478, for example, a non-preselected line has been proposed in which the distance from the waterline to the forefront of the ship is short and all the waterlines above the maximum waterline have an acute angle near the waterline . However, in this non-preselected line, the deck area on the upper part of the forehead located above the maximum waterline is limited, and there is a problem that the wave resistance is not considered from the light state to the full state.

Prior art literature

Patent literature

Patent Document 1: Japanese Patent Application Laid-Open No. 2000-142553

Patent Document 2: Japanese Patent Application Laid-Open No. 2000-335478

Summary of the Invention

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a ship having a bow shape and a designing method capable of reducing a bow wave resistance at a total draft from a light draft to a load draft.

s=tan­¹[0.5×B/{(1-Cpf)×Lpp}](degree)로 계산되는 각도

s를 한쪽 현측의 선수부의 기준선수각도

s로 하고 또한 그 기준선수각도

s에 대해서 「0＜Rs＜

s+15°」의 범위 Rs를 특정선수각도범위 Rs로 했을 때에 선수각도

이 연속해서 상기 특정선수각도범위(Rs) 내에 들어가는 선수부의 특정 상하범위 Ra가 만재흘수선(Df)에 일치하는 제 1 하한(下限)위치(Ha)로부터 상기 만재흘수선(Df)보다도 상기 기준 수두높이(△Hs)만큼 높은 제 1 상한(上限)위치(Hb1)까지의 제 1 범위(R1)을 포함하고 있도록 구성된다. In order to achieve the above-mentioned object, a ship has a spherical bow (5), a ship having a planar line speed of Vs, a ship water length of Lpp, a form width of B, In the ship 1,? Hm calculated by? Hm = V2 / (2g) is defined as a maximum head height? Hm and? Hs = 0.3 占 Hm, Is made the reference head height? Hs

s = tan [0.5 × B / {(1-Cpf) × Lpp}] (degrees)

s is the reference bow angle of the bow of one side

s and the reference player's angle

s " 0 < Rs <

s + 15 ° " is defined as a specific bow angle range Rs,

(Ha) from the first lower limit (Ha) at which the specific upper and lower range Ra of the forefront portion falling within the specific bow angle range Rs coincides with the load line (Df) And a first range Rl up to a first upper limit position Hb1 that is as high as the first predetermined range? Hs.

은 도 6에서 나타내듯이 워터라인(Lz)과 선체중심선(C. L.)이 교차하는 선수부 선단부(Pf)로부터 선장(船長)방향에 1m 후방의 부위(Pa)에서의 워터라인(Lz)의 접선(Lt)과 선체중심선(C. L.)이 이루는 각도로 정의된다.This player angle

The tangent line Lt of the water line Lz at a site Pa 1 m backward from the forefront portion Pf at which the waterline Lz intersects the ship centerline CL as shown in Fig. ) And the ship's center line (CL).

Further, in the profile showing the side surface shape of the bow of the ship, the profile above the spherical bow (5) is divided into the first vertical portion (10a) and the straight inclined portion (10b) And a second vertical portion 10c located at a front end of the first vertical portion 10c and a second vertical portion 10c located at a front end of the second vertical portion 10c, The first point P1 is higher than the lower end position Ha of the specific upper and lower range Ra and a part of the front inclined portion 10b is included in the first range R1, And the second point P2 is located above the first point P1.

s=tan­¹[0.5×B/{(1-Cpf)×Lpp}](degree)로 계산되는 각도

s를 한쪽 현측의 선수부의 기준 선수각도

s로 하고 또한 그 기준 선수각도

s에 대해서「0＜Rs＜

s+15°」의 범위 Rs를 특정 선수각도범위 Rs로 했을 때에 그 특정 선수각도범위 Rs 내에 선수각도

이 연속해서 들어가는 선수부의 특정 상하범위 Ra를 만재흘수선(Df)에 일치하는 제 1 하한위치(Ha1)에서부터, 만재흘수선(Df)보다도 상기 기준 수두높이(△Hs)만큼 높은 제 1 상한위치(Hb1)까지의 제 1 범위(R1)를 포함하도록 선수부 형상을 설계하는 것을 특징으로 하는 방법이다. In order to achieve the above object, the ship designing method has a spherical bow (5), in which the planned line speed is set to Vs, the water line length is set to Lpp, the width is set to B and the casting coefficient of the front half of the ship is set to Cpf When the gravity acceleration is g in the designing method of the type vessel, ΔHm calculated by ΔHm = V² / (2g) is set as the maximum head height ΔHm and ΔHs calculated by ΔHs = 0.3 × ΔHm The height of the head height? Hs

s = tan [0.5 × B / {(1-Cpf) × Lpp}] (degrees)

s is the reference bow angle of the bow of one side

s and the reference player's angle

s " 0 < Rs <

s + 15 ° " is defined as the specific bow range of angles Rs, the bow angle < RTI ID = 0.0 >

(Hb1) higher than the load water line (Df) by the reference head height (Hs) from the first lower-limit position (Ha1) corresponding to the load water line (Df) ) Of the first region (R1).

In the above-described method of designing a ship, a profile showing the side surface shape of the bow is provided. The profile above the spherical bow (5) is divided into a first vertical portion (10a) and a straight or curved front inclined portion And the second vertical portion 10c positioned at the front end of the forehead and the upper end of the first vertical portion 10a as a first point P1 and the lower end of the second vertical portion 10c as a second point The first point P1 is higher than the lower end position Ha of the specific upper and lower range Ra and a part of the front inclined portion 10b is included in the first range R1 , And the forward portion shape is designed such that the second point (P2) is above the first point (P1).

In addition, the linear form is represented by a bow entry section and a stern run section called a parallel part. Further, the cubic mold coefficient Cbf of the front part of the ship is defined as (Amid x (Lpp / 2)) where Vp is the volume of the front half of the ship when the width of the ship is B and the waterline length of the ship is Lpp and the center cross- (Cpf = Vf / (Amid x (Lpp) / 2)).

s+15°」로 하는 것에 관해서는 수면 아래의 선수비대도를 나타내는 식으로서 하기의 (1)식이 있다. Then, the range of the bow angle is defined as " 0 < Rs &

s + 15 占 "is the expression of the skewness under the water surface as the following equation (1).

S = (Lpp / B) X (1-Cpf) (1/2) (1)

In this S, a width of the ship (B) in the front part of the ship front than the center of the ship (midshoot) is defined as a preliminary curve in which the length of the unit length and the length of the ship are set to the scale of Lpp / B (the area in each cross- (S = S1-S2) between the rectangle S1 including the rectangle S1 representing the distribution of the captain's direction divided by the inclination S1, and the bow entrance S2.

s를 설정하고 있다. The angle of the bow below the water surface (equation (1)) is estimated by the following equation (2)

s.

s= tan­¹[B/{2(1-Cpf)Lpp}] (2)

s = tan [B / {2 (1-Cpf) Lpp}] (2)

s보다 조금 크던가 혹은 그 이하로 하는 것으로, 수면 아래와 동등하거나 혹은 그 이하의 선수각도로 하는 것이 가능해서 적절하게 조파를 억제하는 것이 가능하다. Even if the bow angle from the load line to the head height is large

s or less, it is possible to set the angle of inclination to be equal to or lower than that of the water surface, so that it is possible to suppress the wave appropriately.

According to the ship of the present invention, it is possible to minimize the ripple wave due to the interference between the wave generated by the spherical athlete and the wave generated by the hull in a light state.

을 크게 해도 예각의 각도

s보다 조금 크던가 혹은 그 이하의 각도로 하고 있기 때문에 선수부에서의 조파를 최소한으로 억제하는 것이 가능하다. In addition, when the draft is deeper than the light condition in which the cargo is loaded, the angle (bow angle) between the tangent of the forward part of the bow surface and the center line of the ship,

The angle of the acute angle

s or slightly lower than s, it is possible to minimize the ripple at the bow.

를 예각의 각도

s 근방으로 억제하고 있기 때문에 경하흘수선 근방의 특정 상하범위(Ra)의 하단위치로부터 만재흘수선보다 위쪽의 특정 상하범위(Ra)의 상단위치까지는, 어떤 흘수가 되어도 수선면의 선수각도

은 크게 해도 예각의 각도

s 보다 조금 크던가 혹은 그 이하의 각도가 되기 때문에, 통상의 재하상태라면 항주할 때의 조파저항을 작게 하는 것이 가능하다. At this time, considering the player's wave at the time of Hangzhou,

Angle of acute angle

s from the lower end position of the specific upper and lower range Ra near the light waterline to the upper end of the specific upper and lower range Ra above the load waterline,

The angle of the acute angle

s or an angle less than or equal to the angle s, it is possible to reduce the wave resistance at the time of hanging in a normal load state.

As a result, it is possible to efficiently flow backward the water flow below the player flare in the forward part provided with the player flare, so that the increase in the wave resistance can be reduced. Further, It is possible to provide a wide weather deck.

Further, according to the configuration of the bow profile, it is easy to constitute a linear shape satisfying the above-described configuration by a configuration in which the profile of the bow is increased forward.

In addition, when the bow profile is formed in a shape not provided with the second vertical portion only from the upper inclined portion above the conception player and the draft is made deeper, if the front end side of the water line is to be made thinner, The shape becomes a T shape and a slamming problem arises. However, as in the case of this configuration, by increasing the bow profile in the forward direction, slamming is less likely to occur even if the configuration satisfies the configuration of the bow angle described above.

Therefore, according to the method of designing a ship and a ship of the present invention, it is possible to reduce the forward wave resistance at all the drafts from the light draft to the load draft. In addition, since the wave resistance and the resistance increase during the wave are smaller than those of the prior art vessels, the energy consumption in the case of navigating the actual sea area is smaller than that of the prior art.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side view schematically showing a relationship between a first range and a specific upper and lower range in a ship according to an embodiment of the present invention. Fig.
Fig. 2 is a side view schematically showing a profile of a bow of a ship according to an embodiment of the present invention compared with the conventional example. Fig.
3 is a sectional view taken along the line Za-Za in Fig. 2 schematically showing the shape of the hull at the horizontal cross-section in the ship of Fig. 2 compared with the prior art.
4 is a front view schematically showing the shape of a hull at a cross section of the ship in forward and backward directions in the ship according to the embodiment of the present invention.
5 is a plan view schematically showing the shape of a hull at two horizontal cross-sections in which the height of a ship in a conventional linear ship is different.
6 is a view for explaining the definition of a bow angle.
7 is a front view schematically showing an example of a hull shape in a transverse section of each ship in the forward and backward directions in the prior art.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a ship according to an embodiment of the present invention will be described with reference to the drawings. The ship of this embodiment is a displacement type vessel in which Vs is the planned line speed, Lpp is the waterline length, B is the width, and Cpf is the casting coefficient of the front portion of the ship.

s=tan­¹[0.5×B/{(1-Cpf)×Lpp}](°:도: degree)로 계산되는 각도

s를 기준선수각도

s로 한다.Under this condition,? Hm calculated by? Hm = V2 / (2g) is the maximum head height? Hm when the gravitational acceleration is g, and? Hs calculated by? Hs = 0.3 占? Hm is the reference head height? Hs. Also

the angle calculated by s = tan [0.5 × B / {(1-Cpf) × Lpp}] (°: degree: degree)

s to base angle

s.

s에 대해서 「0＜Rs＜

s+15°」의 범위 Rs를 특정선수각도범위 Rs로 한다. 또한 선수각도(

)가 연속해서 특정선수각도범위(Rs) 내에 들어가는 범위를 선수부의 특정상하범위 Ra로 한다. 1 and 2, the ship 1 according to the first embodiment of the present invention is constructed to have the spherical prongs 5 below the light water line Db,

s " 0 < Rs <

s + 15 占 "is defined as a specific bow angle range Rs. Also,

) Falls within a specific bow angle range Rs is defined as a specific upper and lower range Ra of the bow.

As shown in Fig. 1, in the ship 1 according to the first embodiment of the present invention, the reference head height Hs (Hf) is lower than the load water line Df at the first lower limit position Ha1 that coincides with the load line Df. The first range R1 is set to include the specific upper and lower range Ra when the range up to the first upper limit position Hb1 as high as the first range R1 is set as the first range R1.

As shown in Fig. 2, in the profile showing the side surface shape of the forward portion of the ship 1, the profile above the spherical forehead 5 is referred to as the first vertical portion 10a, the front inclined portion 10b, And a vertical portion 10c. The first point P1 is a point where the upper end of the first vertical section 10a is the first point P1 and the lower end of the second vertical section 10c is the second point P2, A part of the front slope part 10b is included in the first range R1 and the second point P2 is higher than the first point P1 . The position of the second point P2 is preferably set to a position lower than " DF + DELTA Hm x 1.5 ".

s를 이용하여 이 기준선수각도

s에 대해서「0＜Rs＜

s+15°」의 범위 Rs를 특정 선수각도범위 Rs로 하고, 이 특정 선수각도범위 Rs 내에 선수각도

이 연속해서 들어가는 선수부의 특정상하범위 Ra를 만재흘수선(Df)에 일치하는 제 1 하한위치(Ha1)로부터 만재흘수선(Df)보다도 기준수두 높이 △Hs 만큼 높은 제 1 상한위치(Hb1)까지의 제 1 범위(R1)를 포함하도록 선수부 형상을 설계하는 방법이다. 이 방법에 의하면 제 1의 실시의 형태의 선박(1)을 설계하는 것이 가능하다. The design method of the ship according to the first embodiment of the present invention has the spherical prime 5, the planned line speed is Vs, the water line length is Lpp, the width is B, the preform is Cpf In this method, the reference head height Hs calculated in the above manner and the reference player's angle < RTI ID = 0.0 >

s < / RTI >

s " 0 < Rs <

s + 15 ° " is defined as a specific bow angle range Rs, and the bow angle < RTI ID = 0.0 >

From the first lower limit position Ha1 corresponding to the load water line Df to the first upper limit position Hb1 which is higher than the load water line Df by the reference water head height DELTA Hs, Lt; RTI ID = 0.0 > R1. ≪ / RTI > According to this method, it is possible to design the vessel 1 of the first embodiment.

In the method of designing a ship according to the above embodiment, in the profile showing the side surface shape of the bow, the profile above the spherical bow 5 is referred to as a first vertical portion 10a and a straight or curved front inclined portion 10b And a second vertical portion 10c. When the upper end of the first vertical portion 10a is defined as the first point P1 and the lower end of the second vertical portion 10c is defined as the second point P2, Is set to be higher than the lower end position Ha of the upper and lower range Ra and a part of the front slope portion 10b is included in the first range R1 and the second point P2 is higher than the first point P1. Design the shape. The position of the second point P2 is preferably set to a position lower than "Df + DELTA Hm x 1.5".

)를 가능한 한 예각으로 하고 있기 때문에 조파를 억제하는 것이 가능하다. 이 때 주행시의 선수조파를 고려하면 경하흘수로부터 만재상태의 수두 높이까지는 수선면의 선수각도(

)가 예각인 채로 계속되기 때문에 어떤 흘수가 되어도 수선면은 기준선수각도(

s)에 가까운 최소의 선수각도(

)를 채택하는 것이 가능하게 된다. According to the ship 1 and the method of designing a ship having the above-described configuration, when the draft is deeper than the light state, the bow angle of the waterline of the bow

) Is made as acute as possible, it is possible to suppress the ripples. In this case, from the light draft to the head height of the full load condition,

) Continues at an acute angle, so that at any draft,

s) at a minimum player angle (

) Can be adopted.

Further, by increasing the profile of the bow portion to the front side, ) Can be easily formed. Also, according to this configuration, if the angle of the forward waterline surface is maintained at an acute angle while maintaining the conventional linear bow profile, the hull shape at the cross section of the ship in the fore and aft direction of the ship becomes T shape, It is possible to avoid the formation of the T shape by making the angle of the leading water surface to an acute angle so as to avoid occurrence of slamming even in a linear shape satisfying the configuration of the bow angle.

In the case where the bulb 5 is disposed below the light water line Db, it is possible to suppress the blast wave due to the interference between the wave generated by the bulb 5 and the wave generated by the bullet .

Therefore, it is possible to reduce the ripple resistance at the entire draft from the light draft to the load draft. In addition, since the wave resistance and the resistance increase during the wave are smaller than those of the prior art vessels, the energy consumption in the case of navigating the actual sea area is smaller than that of the prior art, while securing the required width in the upper deck which becomes the deck of the deck.

Industrial availability

According to the present invention, it is possible to reduce the resistance of the fore-and-aft wave at the overall draft from the light load draft to the load draft, so that it can be used for many ships.

선수각도

s 기준선수각도
△Hm 최대수두높이
△Hs 기준수두높이1, 1X vessel
2 bottoms
3 Side shell
4 Exposed deck (upper deck)
5 design players
10a First vertical section
10b front inclined portion
10c Second vertical section
Db waterline
Df load line
Ha Lower position of specific upper and lower range
Ha1 first lower limit position
Hb1 first upper limit position
P1 1st point
P2 point 2
R1 1st range
Ra specific up and down range
Rs specific player angle range

Player angle

s standard player angle
△ Hm Maximum head height
△ Hs Reference head height

Claims (4)

In a ship 1 of a displacement type having a spherical athlete 5, a planned line speed of Vs, a water line length of Lpp, a width of B, and a casting factor Cpf of a front portion of the ship,
Hm calculated as DELTA Hm = V2 / (2g) is set as the maximum head height DELTA Hm and DELTA Hs calculated as DELTA Hs = 0.3 DELTA Hm is set as the reference head height DELTA Hs when the power acceleration is g ,

s = tan [0.5 × B / {(1-Cpf) × Lpp}] (degrees)

s), the reference bow angle of the bow of one side

s)
The reference player angle (

s " 0 < Rs <

s + 15 DEG " is defined as a specific bow angle range Rs,
Player angle (

(Ra) from the first lower limit position (Ha1) at which the specific upper and lower range (Ra) of the forefront portion that falls within the specific bow angle range (Rs) coincides with the full load line (Df) And a first range (R1) up to a first upper limit position (Hb1) as high as? Hs. The method according to claim 1,
In the profile showing the side profile of the bow, the profile on the upper side of the spherical bow (5) is divided into a first vertical portion (10a) and a straight or curved front inclined portion (10b) (10a) and a lower end of the second vertical section (10c) is a second point (P2), the upper end of the first vertical section (10a) The first point P1 is higher than the lower end position Ha of the specific upper and lower range Ra and a part of the front slant portion 10b is included in the first range R1, Is located above the first point (P1). In a ship design method of a displacement type having a spherical athlete (5), a plan speed Vs, a water column length Lpp, a width B, and a casting factor Cpf in the front half of the ship,
Hm calculated by DELTA Hm = V2 / (2g) is the maximum head height DELTA Hm when the gravity acceleration is g, and DELTA Hs calculated by DELTA Hs = 0.3 DELTA Hm is the reference head height DELTA Hs together,

s = tan [0.5 × B / {(1-Cpf) × Lpp}] (degrees)

s), the reference bow angle of the bow of one side

s)
The reference player angle (

s " 0 < Rs <

s + 15 DEG " is defined as a specific bow angle range Rs,
(Rs) within that particular bow range (Rs)

(Ra) which is higher than the load water line (Df) by the reference head height (Hs) from the first lower-limit position (Ha1) corresponding to the load line (Df) Wherein the bow shape is designed to include a first range (R1) up to a position (Hb1). The method of claim 3,
In the profile representing the side profile of the bow, the profile above the spherical bow (5) is divided into a first vertical portion (10a) and a straight or curved front inclined portion (10b) (10a) and a lower end of the second vertical section (10c) is a second point (P2), the upper end of the first vertical section (10a) The first point P1 is higher than the lower end position Ha of the specific upper and lower range Ra and a part of the front slant portion 10b is included in the first range R1 and the second point P2 ) Is designed to be higher than the first point (P1).

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