JP3752539B2 - Hull motion reduction device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hull motion reduction device that reduces the occurrence of pitching of a hull caused by waves arriving at the bow of a marine vessel.
[0002]
[Prior art]
Conventionally, as a means for reducing hull movement such as pitching of the hull, it has been considered that a fin is projected horizontally from the hull under the water surface of the bow, but in such a means, the fin is always below the water surface. Therefore, there is a problem that the hull resistance is increased.
[0003]
[Problems to be solved by the invention]
The present invention, in the bow, the hull plate surface of the above the load line, by appropriately forming the collision force to be cod also an increase in wave-damping force in interaction with seawater, the ship motion It is an object of the present invention to provide an apparatus that can achieve reduction efficiently.
[0004]
[Means for Solving the Problems]
To attain the above object, ship motion reduction apparatus of the present invention, in the ship neck, the hull plate surface of the above the load line, a large number of blocks, densely while spaced vertically and back and forth to each other is mounted, the blocks are configured so as to shift in the longitudinal direction and Rutotomoni includes a pointed edge which is formed in the horizontal direction, the upper of the block spacing, and the block mutual spacing in the lower right below the It is characterized by being.
[0005]
In the above-described ship motion reduction apparatus of the present invention, in the above the load line, a large number of blocks are densely mounted while spaced vertically and back and forth to each other hull plate surface of the bow, the upper of the block Since the distance between each other and the distance between the blocks in the lower stage immediately below it are configured to deviate in the front-rear direction, the structure caused by the interaction with the seawater in the blocks when navigating in the waves. By increasing the wave damping force, it is possible to obtain an effect of efficiently suppressing hull motion such as pitching and heaving of the hull.
[0006]
Moreover, since the said block brings about the crushing diffusion effect with respect to the wave which arrives at a bow part at the time of the navigation in a wave, the effect which reduces the amount of seawater driven on a ship deck is also acquired.
[0007]
And since the said block is provided in the hull outer plate | board surface above a full load water line, when navigating a calm sea area, the increase of resistance which a conventional underwater fin brings is not caused.
[0008]
Further, since the block is provided with a pointed edge which is formed in the horizontal direction, crushing diffusion effect to the above wave comes to be further enhanced.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, as for ship motion reduction apparatus according to an embodiment of the present invention will be described with reference to the drawings, FIG. 1 is the bow-side view, FIG. 2 is taken along line C-C sectional view of FIG.
[0010]
As shown in FIGS. 1 and 2, in ship motion reduction equipment of the real施形condition, in the bow section 1, above the outer hull plate surface 1a than load line 2, a large number of blocks 5, mutual It is mounted densely with a gap in the top and bottom and front and back.
Each block 5 has a distance Rutotomoni, the upper block 5 each other with a pointed edge 5a formed in the horizontal direction, the block 5 mutual spacing in the lower right below the configured to be shifted in the longitudinal direction ing.
[0011]
In ship motion reduction apparatus implementation described above, the load line number of the block 5 to the outer hull plate surface 1a of the bow portion 1 in the above the 2 is densely mounted while spaced vertically and back and forth to each other, In addition, since the interval between the upper blocks 5 and the interval between the blocks 5 immediately below it are configured to deviate in the front-rear direction, when navigating in the waves, the interaction between the block 5 and the seawater As a result of the increase in the wave-making damping force caused by the above, an effect of efficiently suppressing hull motion such as pitching and heaving of the hull can be obtained.
[0012]
Further, since each block 5 brings about a crushing and diffusion effect on the waves arriving at the bow 1 when navigating in the waves, an effect of reducing the amount of seawater to be driven onto the hull deck can be obtained.
And since each block 5 is provided with the pointed edge 5a formed in the horizontal direction, the crushing diffusion effect with respect to said wave is further heightened.
[0013]
Furthermore, since the block 5 is provided on the hull outer plate surface 1a above the full-length water line 2, when navigating in a calm sea area, the increase in resistance that a conventional underwater fin brings is not caused.
[0014]
【The invention's effect】
As described above in detail, according to the ship motion reduction apparatus of the present invention, densely mounted while spaced vertically and back and forth a number of blocks to each other hull plate surface of the bow in the above the full mounting waterline is the upper of the block mutual spacing by Rukoto is configured to be shifted in the longitudinal direction and the block mutual spacing in the lower right below them, when navigating in waves is a sea of the block As a result, the wave-damping force is increased and the hull movement such as pitching and heaving of the hull can be effectively suppressed.
Moreover, since the said block brings about the crushing diffusion effect with respect to the wave which arrives at the bow part at the time of the navigation in a wave, the effect which reduces the amount of seawater to be driven on the hull deck is also acquired.
And since the said block is provided in the hull outer plate | board surface above a full load water line, when navigating a calm sea area, the increase of resistance which the conventional underwater fin brings is not caused. Moreover, since the said block is provided with the pointed edge formed in the horizontal direction, the crushing spreading | diffusion effect with respect to said wave is further heightened.
[Brief description of the drawings]
FIG. 1 is a side view of a bow portion provided with a hull motion reducing device as one embodiment of the present invention.
2 is a taken along line C-C sectional view of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bow part 1a Hull outer plate surface 2 Full load water line 5 Block 5a Pointed edge

Claims (1)

At the bow, a large number of blocks are densely mounted on the hull outer plate surface above the full load water line with a space between each other in the vertical and longitudinal directions, and the blocks are pointed edges formed in the horizontal direction. the provided Rutotomoni, the upper of the block mutual spacing, characterized in that it is configured to be shifted in the longitudinal direction and the block mutual spacing in the lower right below the hull motion reduction apparatus.

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