JP2013014192A - Structure for reducing resistance due to wind pressure of ship - Google Patents

Abstract

A ship wind pressure resistance reduction structure that effectively reduces wind pressure resistance of a ship having a wing portion and a support portion.
A structure for reducing wind pressure resistance of a ship having a wing portion that protrudes in a ship width direction from a residential area and a columnar support portion that supports the wing portion from below. A long box-like support part appendage 10 is attached along the vertical direction on the front side to reduce the wind pressure resistance received by the support part 1 during navigation. The support part appendage 10 is a long box-like body having a narrower width than the support part 1, and the support part appendage 10 is attached so that a step is formed at the left and right edges on the front side of the support part 1.
[Selection] Figure 1

Description

  The present invention relates to a structure for reducing wind pressure resistance of a ship.

  Conventionally, in a ship such as a tanker or a bulk carrier, a residential area having a steering room, a sailor's room, etc. is installed on the upper deck of the hull. Since this residential area receives wind pressure resistance from the front when navigating the ship, it is an increase factor in fuel consumption. In addition, Bridge Wing (hereinafter referred to as “wing part”) protrudes from the residential area in the ship width direction, and this wing part also receives wind resistance.

  On the other hand, the invention which reduces the wind pressure resistance of a wing part is disclosed. For example, Patent Document 1 describes a belt-like plate 8 protruding from a dodger 2 (wing part), and Patent Document 2 describes a current plate 18 attached to the wing part. Further, Patent Document 3 describes a corner cut portion 10 formed in the dodger 2, and Patent Document 4 describes a projecting front surface of the dodger 3 in a horizontal semi-cylindrical shape.

JP-A-11-129976 Japanese Utility Model Publication No. 58-143785 JP-A-11-29090 Japanese Utility Model Publication No. 1-99792

  On the other hand, in large ships such as CAPE (Capesize: Cape-sized large ships), VLCC (Very Large Crude Carrier: large tankers), VLOC (Very Large Ore Carrier: large-sized bulk ships), etc., the wing part is wide. In many cases, a columnar support portion is installed to support the wing portion from below. 6 to 8 show a conventional large-sized ship having such a support part. FIG. 6 is a side view showing the ship, FIG. 7 is a front view showing the residential area of the ship, and FIG. It is a side view which shows a residential area.

  On the upper deck of the ship 100, a residential area 3 having a wheelhouse, a sailor's room, and the like is installed. In the ship width direction from the residential area 3, wings 2 and 2 project toward the port and starboard. Further, in order to support the wing portions 2 and 2 from below, columnar support portions 1 and 1 are installed between the wing portions 2 and 2 and the upper deck. Although the support part shown in FIG. 6 thru | or FIG. 8 is set as the structure which has arrange | positioned two columnar members in the figure of 8 like a stepladder, not only such a structure but the shape is various.

  Such a support is often provided not only for large ships, but also for ships having tower-type residential areas in which the width of the main body of the residential area is reduced to reduce the frontal area in order to enhance the energy saving effect.

  However, in a ship having a support part in addition to the wing part, the wind pressure resistance that the support part receives from the front during navigation of the ship is large, which causes an increase in fuel consumption. It is also necessary to reduce

  On the other hand, the invention described in Patent Documents 1 to 4 is intended to reduce the wind pressure resistance of the wing part, and cannot reduce the wind pressure resistance of the support part.

  Moreover, it is necessary to reduce the wind pressure resistance of a wing part and a support part also about the ship which is already in service not only for a newly built ship.

  The present invention solves the above-described conventional problems and provides a wind pressure resistance reducing structure for a ship that effectively reduces the wind pressure resistance of a ship having a wing portion and a support portion.

  The wind pressure resistance reducing structure for a ship of the invention according to claim 1 is a wind pressure resistance reducing structure for a ship having a wing portion protruding in a ship width direction from a residential area and a columnar support portion for supporting the wing portion from below. Along with the vertical direction on the front side of the support part, a long box-like support part appendage is attached to reduce the wind pressure resistance received by the support part during navigation. .

  The invention according to claim 2 is the wind pressure resistance reduction structure for a ship according to claim 1, wherein the support part appendage is a long box-like body having a narrower width than the support part. Is attached so that a step is formed at the left and right edge portions on the front side of the support portion.

  The invention according to claim 3 is the wind pressure resistance reduction structure for a ship according to claim 1, wherein the support part appendage is a long box-like body having the same width as the support part, and is inclined on both sides in the longitudinal direction. A surface is formed.

  A wind pressure resistance reducing structure for a ship according to a fourth aspect of the present invention is a wind pressure resistance reducing structure for a ship having a wing portion protruding in a ship width direction from a residential area and a columnar support portion for supporting the wing portion from below. Along with the vertical direction on the front side of the support part, a support part appendage of a long box-like body is attached to reduce the wind pressure resistance received by the support part during navigation, and the front side of the wing part A wing part appendage of a long box-like body is attached along the horizontal direction on the side to reduce the wind pressure resistance received by the wing part during navigation.

  The invention according to claim 5 is the wind pressure resistance reduction structure for a ship according to claim 4, wherein the support part appendage is a long box-like body having a narrower width than the support part. The wing part appendage is a long box-like body having a narrower width than the wing part, and the wing part appendage is attached to the wing part. It is attached so that a level | step difference may arise in the up-and-down edge part of the front side of a part.

  The invention according to claim 6 is the wind pressure resistance reducing structure of the ship according to claim 4, wherein the support part appendage is a long box-like body having the same width as the support part, and is inclined on both sides in the longitudinal direction. The wing part appendage is a long box-like body having the same width as the wing part, and inclined surfaces are formed on both sides in the longitudinal direction.

  According to the first aspect of the present invention, a long box-shaped support part appendage is attached along the vertical direction on the front side of the support part to reduce the wind pressure resistance received by the support part during navigation. ing. Therefore, for example, like a large tanker or a large bulk carrier, the wind pressure resistance of a ship having a wing portion that protrudes in the width direction of the ship from the residential area and a columnar support portion that supports the wing portion from below is effectively reduced. be able to. Moreover, since the support part attachment to be attached is a long box-like body, the structure is simple and can be easily formed and attached. Moreover, not only a new ship but also a ship already in service can be easily attached.

  According to the second aspect of the present invention, the support part appendage is a long box-like body having a narrower width than the support part, and the support part appendage is stepped at the left and right edges on the front side of the support part. By attaching in this way, the wind pressure resistance which a support part receives at the time of navigation can be reduced by the cornering effect of a level | step difference.

  Moreover, according to the invention which concerns on Claim 3, since a support part addition is a long box-shaped body of the same width as a support part, and the inclined surface is formed in the both sides of a longitudinal direction, a support part is at the time of navigation. The wind pressure resistance to be received can be reduced by the inclined surface.

  Moreover, according to the invention which concerns on Claim 4, along with the up-down direction of the front side of a support part, the support part addition thing of a elongate box-shaped body is attached, and the wind pressure resistance which a support part receives at the time of navigation is reduced. It has become. Furthermore, along with the horizontal direction on the front side of the wing part, a wing part addition of a long box-like body is attached to reduce the wind pressure resistance received by the wing part during navigation. Therefore, for example, like a large tanker or a large bulk carrier, the wind pressure resistance of a ship having a wing portion that protrudes in the width direction of the ship from the residential area and a columnar support portion that supports the wing portion from below is effectively reduced. be able to. Moreover, since the support part addition and the wing part addition to be attached are long box-like bodies, the structure is simple and can be easily formed and attached. Moreover, not only a new ship but also a ship already in service can be easily attached.

  Moreover, according to the invention which concerns on Claim 5, a support part addition is a elongate box-shaped body with a width | variety narrower than a support part, and a level | step difference arises in the right-and-left edge part of the front side of a support part. By attaching in this way, the wind pressure resistance which a support part receives at the time of navigation can be reduced by the cornering effect of a level | step difference. Furthermore, the wing part appendage is a long box-like body having a narrower width than the wing part, and the wing part appendage is attached so that there is a step at the upper and lower edges on the front side of the wing part. The wind pressure resistance received by can be reduced by the cornering effect of the step.

  Moreover, according to the invention which concerns on Claim 6, since a support part addition thing is a long box-shaped body of the same width as a support part, and the inclined surface is formed in the both sides of a longitudinal direction, a support part is at the time of navigation. The wind pressure resistance to be received can be reduced by the inclined surface. Furthermore, since the wing part appendage is a long box-like body having the same width as the wing part, and inclined surfaces are formed on both sides in the longitudinal direction, the wind pressure resistance received by the wing part during navigation should be reduced by the inclined surface. Can do.

  As mentioned above, according to this invention, the wind pressure resistance reduction structure of a ship which reduces effectively the wind pressure resistance of the ship which has a wing part and a support part can be provided.

It is a front view which shows the residential area of a ship by the wind pressure resistance reduction structure of the ship which concerns on embodiment of this invention. It is a side view which shows the residential area of a ship by the wind pressure resistance reduction structure of the ship which concerns on embodiment of this invention. It is (a) XX expanded sectional view of FIG. 1, (b) YY expanded sectional view. It is a cross-sectional view showing an appendage. It is a front view which shows an addition thing. It is a side view which shows a ship. It is a front view which shows the residential area of a ship. It is a side view which shows the residence area of a ship.

  Next, with reference to FIG. 1 thru | or FIG. 5, the wind pressure resistance reduction structure of the ship which concerns on embodiment of this invention is demonstrated. FIG. 1 is a front view showing a residential area 3 of the ship according to the wind pressure resistance reducing structure of the ship according to the present embodiment, and FIG. 2 is a side view showing the residential area 3. 3 is (a) XX enlarged sectional view of FIG. 1, and (b) YY enlarged sectional view of FIG.

  On the upper deck of the ship 100, a residential area 3 having a wheelhouse, a sailor's room, and the like is installed. In the ship width direction from the residential area 3, wings 2 and 2 project toward the port and starboard. Further, in order to support the wing portions 2 and 2 from below, columnar support portions 1 and 1 are installed between the wing portions 2 and 2 and the upper deck. Although the support part shown in FIG.1 and FIG.2 is set as the structure which has arrange | positioned two columnar members in the figure of 8 like a stepladder, not only such a structure but the shape is various.

  A support part appendage 10 is attached to the front side of the support part 1 (the side that receives wind pressure during vessel navigation). The support portion appendage 10 is attached between the vicinity of the upper end portion and the vicinity of the lower end portion along the vertical direction of the support portion 1.

  The support part appendage 10 is a long box-like body, and its width is slightly narrower than the width of the support part 1. And as shown to Fig.3 (a), the support part addition 10 is attached to the position which leaves the both right and left sides of the width direction of the support part 1 left. Thereby, a level | step difference arises in the right-and-left edge parts A and B of the front side of the support part 1, and there exists a corner cutting effect with respect to the wind pressure received at the time of ship navigation. As will be described later, depending on the cross-sectional shape of the appendage, the width of the support portion appendage 10 may be the same as the width of the support portion 1.

  On the other hand, a wing part appendage 20 is attached to the front side of the wing part 2 (the side that receives wind pressure during vessel navigation). The wing part appendage 20 is attached between the vicinity of the base end part and the vicinity of the front end part along the horizontal direction of the wing part 2.

  The wing portion appendage 20 is a long box-like body, and its width is slightly narrower than the width of the wing portion 2. And as shown in FIG.3 (b), the wing part addition 20 is attached to the position which leaves the upper and lower sides of the width direction of the wing part 2 left. Thereby, a level | step difference arises in the up-and-down edge parts C and D of the front side of the wing part 2, and there exists a corner cutting effect with respect to the wind pressure received at the time of ship navigation. As will be described later, depending on the cross-sectional shape of the appendage, the width of the wing portion appendage 20 may be the same as the width of the wing portion 2.

  As the members of the support part appendage 10 and the wing part appendage 20, it is preferable to use a member having a specific gravity smaller than iron, which is a member constituting most of the ship, such as FRP (fiber reinforced plastic). Moreover, as an attachment method, the method with few new heavy loads, such as bolt connection, is preferable. Generally, since the wing part and the support part are likely to generate vibrations by resonating with the rotation speed of the propeller or the engine, the structural design is performed in consideration of the natural frequency in advance. Therefore, it is possible to make it difficult to change the vibration characteristics by using a lightweight member.

  The support part appendage 10 and the wing part appendage 20 shown in FIG. 1 to FIG. 3 have a rectangular cross-sectional shape, but it is only necessary to reduce the wind pressure resistance received during navigation. Various cross-sectional shapes are possible as shown. FIG. 4 shows the support part appendage 10, but the same applies to the wing part appendage 20.

Moreover, as the long box-like body of the support part appendage 10 and the wing part appendage 20, both those having no cavity and those having a cavity can be used. In FIG. 4, the support part additions 10 a ₁ , 10 b ₁ , 10 c ₁ , 10 d ₁ , and 10 e ₁ shown on the left side are clogged to the inside, and the support part additions 10 a ₂ , shown on the right side, 10b ₂ , 10c ₂ , 10d ₂ , and 10e ₂ are those in which the inside is hollow. Further weight reduction can be achieved by making the inside hollow like the support part addition shown on the right side.

  The appendage 10a in FIG. 4A has a rectangular cross-sectional shape, and its width is slightly narrower than the width of the support portion 1. And a level | step difference arises in the right-and-left edge part A and B of the front side of the support part 1, and the wind pressure resistance received at the time of ship navigation is reduced by the cornering effect of a level | step difference.

  The additive 10b in FIG. 4B has a trapezoidal cross-sectional shape, and its width is the same as the width of the support portion 1. And an inclined surface is formed so that the both sides of the longitudinal direction of an appendage are chamfered, and the wind pressure resistance received at the time of ship navigation is reduced by an inclined surface.

  The appendage 10c in FIG. 4C is a kamaboko shape with a flat cross-sectional shape on the upper surface, and the width thereof is the same as the width of the support portion 1. And the R-shaped inclined surface is formed in the both sides of the longitudinal direction of an appendage, and the wind pressure resistance received at the time of ship navigation is reduced by an inclined surface.

  The adduct 10d shown in FIG. 4 (d) has a flat kamaboko shape in which the cross-sectional shape is flat on both sides, and its width is slightly narrower than the width of the support portion 1. And a level | step difference arises in the right-and-left edge part A and B of the front side of the support part 1, and the wind pressure resistance received at the time of ship navigation is reduced by the cornering effect of a level | step difference. Moreover, the wind pressure resistance reduction effect by the swelling of the upper surface can also be expected.

  The additive 10e shown in FIG. 4 (e) has a dome shape in cross section, and its width is the same as the width of the support portion 1. And the R-shaped inclined surface is formed in the both sides of the longitudinal direction of an appendage, and the wind pressure resistance received at the time of ship navigation is reduced by an inclined surface. Moreover, the wind pressure resistance reduction effect by the swelling of the upper surface can also be expected.

  Note that the adduct 10a in FIG. 4A is considered to be inferior to the other adducts 10b to 10e in terms of the wind resistance reduction effect, but because the structure is the simplest, the manufacturing cost, weight, It is thought that it is excellent in terms of mounting work burden.

  Moreover, as shown in FIG. 5, the support part addition 10 and the wing part addition 20 can also be comprised from several units. A support part appendage 10 shown in FIG. 5A is composed of a plurality of support part appendage units 11. Further, the wing part appendage 20 shown in FIG. 5B is composed of a plurality of wing part appendage units 21. As a result, the attachment work becomes easy, and it is possible to cope with support portions and wing portions of various lengths.

  Hereinafter, the result of the wind tunnel experiment by the wind pressure resistance reducing structure of the ship according to the present embodiment will be described. In the experiment, a model (1/50 of the actual ship size) of the living area of a ship having a wing part and a support part was used, and the fluid force in the longitudinal direction of the hull was measured while changing the wind direction. The difference in wind resistance coefficient with and without presence was calculated.

The wing part appendage is a long box-like body narrower than the wing part as shown in FIGS. 1 to 3, and has a slightly shorter length than the wing part. Similarly, the support part appendage is a long box-like body narrower than the support part, and has a slightly shorter length than the support part. The sizes of the wing part appendage and the support part appendage are as follows.
Wing part adjunct: width 20mm, length 252mm, thickness 10mm
Support part addition: width 16mm, length 216mm, thickness 5mm

Table 1 shows the results of the wind tunnel experiment. In Table 1, the horizontal axis indicates the wind direction (degree), and the vertical axis indicates the wind pressure resistance coefficient (Cfx). Note that the wind direction (degree) indicates an angle with respect to the hull longitudinal direction (x-axis) (0 degree = frontal wind). The wind pressure resistance coefficient (Cfx) is a numerical value obtained by the following mathematical formula.
Cfx = Fx / {(1/2) ρV ² S}
Fx: Fluid force in the x-axis direction ρ: Air density V: Wind speed S: Representative area (projected area)

  As shown in Table 1, the wind pressure resistance coefficient was reduced in the half range of the wind direction of 0 to 40 degrees in the case of “with additive” than in the case of “without additive”, and an effect of reducing the wind pressure resistance was seen. The reduction effect is about 10% at a wind direction of 0 degrees (however, it is a reduction effect for the residential area alone and not 10% for the entire hull).

  According to the wind pressure resistance reducing structure for a ship according to the present embodiment, a support portion appendage 10 having a long box-like body is attached along the vertical direction on the front side of the support portion 1 so that the support portion 1 receives during navigation. Wind pressure resistance is reduced. Furthermore, along the horizontal direction of the front side of the wing part 2, the wing part addition 20 of a long box-shaped body is attached, and the wind pressure resistance which the wing part 2 receives at the time of navigation is reduced. Therefore, for example, like a large tanker or a large bulk carrier, the wind pressure resistance of the ship 100 having the wing part 2 protruding in the width direction of the ship from the residential area 3 and the columnar support part 1 supporting the wing part 2 from below is obtained. It can be effectively reduced. Moreover, since the support part addition 10 and the wing part addition 20 to be attached are long box-like bodies, the structure is simple and can be easily formed and attached. Moreover, not only a new ship but also a ship already in service can be easily attached.

  Further, when the support part appendage 10 is a long box-like body having a narrower width than the support part 1, the support part appendage 10 has steps A and B at the left and right edges on the front side of the support part 1. By attaching, the wind pressure resistance which the support part 1 receives at the time of navigation can be reduced by the corner cutting effect of the steps A and B. Further, when the wing part appendage 20 is a long box-like body narrower than the wing part 2, the wing part appendage 20 has steps C and D at the upper and lower edges on the front side of the wing part 2. By attaching, the wind pressure resistance which the wing part 2 receives at the time of navigation can be reduced by the corner cutting effect of the steps C and D.

  Further, when the support part appendage 10 is a long box-like body having the same width as the support part 1 and inclined surfaces are formed on both sides in the longitudinal direction, the wind pressure resistance received by the support part 1 during navigation is expressed by the inclined surface. Can be reduced. Further, when the wing part appendage 20 is a long box-like body having the same width as the wing part 2 and inclined surfaces are formed on both sides in the longitudinal direction, the wind pressure resistance received by the wing part 2 during navigation is Can be reduced.

  As mentioned above, according to the wind pressure resistance reduction structure of the ship which concerns on this embodiment, the wind pressure resistance reduction structure of a ship which reduces effectively the wind pressure resistance of the ship which has the wing part 2 and the support part 1 can be provided. .

  The long box-like body used as the support part appendage 10 and the wing part appendage 20 is not limited to the cross-sectional shape shown in FIG. 4 as long as the wind pressure resistance received during navigation can be reduced.

  Moreover, in this embodiment, although the attachment was attached to both the support part 1 and the wing part 2, even if it attached to either one, it is possible to reduce wind pressure resistance. However, it is preferable to attach to both.

  Moreover, by reducing the wind pressure resistance of the support part 1 and the wing part 2, the air flow field around the support part and the wing part is rectified, and the effect of reducing the vibration of the ship can be expected.

DESCRIPTION OF SYMBOLS 1 Support part 2 Wing part 3 Residential area 10 Support part addition 11 Support part addition unit 20 Wing part addition 21 Wing part addition unit 100 Ship

According to a third aspect of the present invention, in the wind pressure resistance reducing structure for a ship according to the second aspect, a cross-sectional shape of the support portion appendage is a rectangle .

The invention according to claim 6 is the wind pressure resistance reducing structure for a ship according to claim 5 , wherein the support section appendage and the wing section appendage have a rectangular cross-sectional shape .

According to the invention of claim 3, since the cross-sectional shape of the support part appendage is rectangular, the structure is simple, and the manufacturing cost, weight, and mounting work burden are excellent.

According to the invention according to claim 6, since the cross-sectional shape of the support part appendage and the wing part appendage is rectangular, the structure is simple, and it is excellent in terms of manufacturing cost, weight, and mounting work load. ing.

Wind resistance reduction structure of the ship of the invention according to claim 1, the wing portion projecting from the living quarters in the ship width direction, in a ship having a columnar support portion for supporting the wing portion from below, of the support portion along the vertical direction of the front side, by attaching the support part adduct of elongated box-like body, a wind resistance reducing structure of a ship which is adapted the support portion is reduced wind resistance experienced during sailing, the support The part addition is a long box-like body having the same width as the support part, the cross-sectional shape is trapezoidal, and inclined surfaces are formed on both sides in the longitudinal direction.

A wind pressure resistance reducing structure for a ship according to a second aspect of the present invention is a ship having a wing portion that protrudes in a ship width direction from a residential area, and a columnar support portion that supports the wing portion from below. A wind pressure resistance reducing structure for a ship in which a long box-like support part appendage is attached along the vertical direction on the front side so as to reduce the wind pressure resistance received by the support part during navigation. The part appendage is a long box-like body having a narrower width than the support part, and the support part appendage is attached so that a step is generated at the left and right edges on the front side of the support part. .

Wind resistance reduction structure of the ship of the invention according to claim 4, the wing portions projecting from living quarters in the ship width direction, in a ship having a columnar support portion for supporting the wing portion from below, of the support portion Along with the vertical direction on the front side, attach a support part appendage of a long box-like body to reduce the wind pressure resistance received by the support part during navigation, along the horizontal direction on the front side of the wing part A wind pressure resistance reducing structure for a ship, to which a wing portion appendage of a long box-like body is attached to reduce the wind pressure resistance received by the wing portion during navigation , wherein the support portion appendage and the support portion A long box-like body having the same width, the cross-sectional shape is trapezoidal, inclined surfaces are formed on both sides in the longitudinal direction, and the wing part appendage is a long box shape having the same width as the wing part. Body Te, cross-sectional shape is trapezoidal, characterized in that the inclined surfaces on both sides of the longitudinal direction are formed.

A wind pressure resistance reducing structure for a ship according to a fifth aspect of the present invention is a ship having a wing portion that protrudes in a ship width direction from a residential area, and a columnar support portion that supports the wing portion from below. Along with the vertical direction on the front side, attach a support part appendage of a long box-like body to reduce the wind pressure resistance received by the support part during navigation, along the horizontal direction on the front side of the wing part A structure for reducing wind pressure resistance of a ship to which a wing part appendage of a long box-like body is attached to reduce the wind pressure resistance received by the wing part during navigation, wherein the support part appendage is more than the support part. Is a long box-like body having a narrow width, and the support part appendage is attached so that a step is formed at the left and right edges on the front side of the support part, and the wing part appendage is attached to the wing part. A narrow elongated box-like body having Rimohaba, characterized in that attached as a step is formed in the upper and lower edge portions of the front side of the wing portion adduct the wing portion.

According to the first aspect of the present invention, a long box-shaped support part appendage is attached along the vertical direction on the front side of the support part to reduce the wind pressure resistance received by the support part during navigation. ing. Therefore, for example, like a large tanker or a large bulk carrier, the wind pressure resistance of a ship having a wing portion that protrudes in the width direction of the ship from the residential area and a columnar support portion that supports the wing portion from below is effectively reduced. be able to. Moreover, since the support part attachment to be attached is a long box-like body, the structure is simple and can be easily formed and attached. Moreover, not only a new ship but also a ship already in service can be easily attached. In addition, the support part appendage is a long box-like body having the same width as the support part, the cross-sectional shape is trapezoidal, and inclined surfaces are formed on both sides in the longitudinal direction. Wind pressure resistance can be reduced by the inclined surface.

Moreover, according to the invention which concerns on Claim 2, along with the up-down direction of the front side of a support part, the support part addition thing of a elongate box-shaped body is attached, and the wind pressure resistance which a support part receives at the time of navigation is reduced. It has become. Therefore, for example, like a large tanker or a large bulk carrier, the wind pressure resistance of a ship having a wing portion that protrudes in the width direction of the ship from the residential area and a columnar support portion that supports the wing portion from below is effectively reduced. be able to. Moreover, since the support part attachment to be attached is a long box-like body, the structure is simple and can be easily formed and attached. Moreover, not only a new ship but also a ship already in service can be easily attached. In addition, the support part appendage is a long box-like body having a narrower width than the support part, and the support part appendage is attached so that there are steps on the left and right edges on the front side of the support part. The wind pressure resistance received by can be reduced by the cornering effect of the step.

Moreover, according to the invention which concerns on Claim 4, along with the up-down direction of the front side of a support part, the support part addition thing of a elongate box-shaped body is attached, and the wind pressure resistance which a support part receives at the time of navigation is reduced. It has become. Furthermore, along with the horizontal direction on the front side of the wing part, a wing part addition of a long box-like body is attached to reduce the wind pressure resistance received by the wing part during navigation. Therefore, for example, like a large tanker or a large bulk carrier, the wind pressure resistance of a ship having a wing portion that protrudes in the width direction of the ship from the residential area and a columnar support portion that supports the wing portion from below is effectively reduced. be able to. Moreover, since the support part addition and the wing part addition to be attached are long box-like bodies, the structure is simple and can be easily formed and attached. Moreover, not only a new ship but also a ship already in service can be easily attached. In addition, the support part appendage is a long box-like body having the same width as the support part, the cross-sectional shape is trapezoidal, and inclined surfaces are formed on both sides in the longitudinal direction. Wind pressure resistance can be reduced by the inclined surface. Furthermore, the wing part appendage is a long box-like body having the same width as the wing part, the cross-sectional shape is trapezoidal, and inclined surfaces are formed on both sides in the longitudinal direction, so that the wing part receives during navigation. Wind pressure resistance can be reduced by the inclined surface.

Moreover, according to the invention which concerns on Claim 5, along with the up-down direction of the front side of a support part, the support part addition thing of a elongate box-shaped body is attached, and the wind pressure resistance which a support part receives at the time of navigation is reduced. It has become. Furthermore, along with the horizontal direction on the front side of the wing part, a wing part addition of a long box-like body is attached to reduce the wind pressure resistance received by the wing part during navigation. Therefore, for example, like a large tanker or a large bulk carrier, the wind pressure resistance of a ship having a wing portion that protrudes in the width direction of the ship from the residential area and a columnar support portion that supports the wing portion from below is effectively reduced. be able to. In addition, the support part appendage is a long box-like body having a narrower width than the support part, and the support part appendage is attached so that there are steps on the left and right edges on the front side of the support part. The wind pressure resistance received by can be reduced by the cornering effect of the step. Furthermore, the wing part appendage is a long box-like body having a narrower width than the wing part, and the wing part appendage is attached so that there is a step at the upper and lower edges on the front side of the wing part. The wind pressure resistance received by can be reduced by the cornering effect of the step.

Claims (6)

A wind pressure resistance reducing structure for a ship having a wing part protruding in a ship width direction from a residential area, and a columnar support part for supporting the wing part from below,
A wind pressure of a ship is characterized by attaching a long box-like support portion appendage along the vertical direction on the front side of the support portion to reduce the wind pressure resistance received by the support portion during navigation. Resistance reduction structure.   The support part appendage is a long box-like body having a narrower width than the support part, and the support part appendage is attached so that a step is formed at the left and right edge parts on the front side of the support part. The wind pressure resistance reducing structure for a ship according to claim 1.   The wind pressure resistance reduction of the ship according to claim 1, wherein the support part appendage is a long box-like body having the same width as the support part, and inclined surfaces are formed on both sides in the longitudinal direction. Construction. A wind pressure resistance reducing structure for a ship having a wing part protruding in a ship width direction from a residential area, and a columnar support part for supporting the wing part from below,
Along with the vertical direction on the front side of the support part, attach a support part appendage of a long box-like body so as to reduce the wind pressure resistance received by the support part during navigation,
A wind pressure of a ship, wherein a wing portion appendage of a long box-like body is attached along the horizontal direction on the front side of the wing portion to reduce the wind pressure resistance received by the wing portion during navigation. Resistance reduction structure. The support part appendage is a long box-like body having a narrower width than the support part, and the support part appendage is attached so that a step is generated at the left and right edge parts on the front side of the support part,
The wing part appendage is a long box-like body having a narrower width than the wing part, and the wing part appendage is attached so that a step is generated at the upper and lower edges on the front side of the wing part. The structure for reducing wind pressure resistance of a ship according to claim 4. The support part appendage is a long box-like body having the same width as the support part, and inclined surfaces are formed on both sides in the longitudinal direction.
The wind pressure resistance reduction of a ship according to claim 4, wherein the wing part appendage is a long box-like body having the same width as the wing part, and inclined surfaces are formed on both sides in the longitudinal direction. Construction.

Images