KR100241166B1 - Rolling decreasing equipment of floating ocean structure - Google Patents

Abstract

The present invention has the advantage of damping the fluctuation of the floating offshore structure adaptively according to the sea condition and also having a long lifetime. The horizontal moving member is coupled to the groove and the groove formed concavely inwardly on the side of the body, And a horizontal moving mechanism for horizontally moving the horizontal moving member in accordance with the state of the ocean in which the offshore structure is installed.

Description

Floating damping system of floating structure

The present invention relates to a floating damping device for a floating floating structure, and more particularly to a floating damping device for a floating floating structure floating in the sea by a floating body such as a bridge, a floating airport, a petroleum drilling rig.

As the importance of marine resource development increases, various types of offshore structures are being installed on the sea besides ships. Most marine structures are floating in the sea by the opponent. These floating oceanic structures float in the ocean and are affected by waves and winds. Various methods have been researched and developed in order to alleviate the fluctuation of such a floating offshore structure. An example thereof is disclosed in Japanese Patent Laid-Open Publication No. 6-329080 (hereinafter referred to as "prior invention").

FIG. 1 is a partial cross-sectional view of a floating offshore structure to which the prior application is applied, and FIG. 2 is a partial cross-sectional view of a floating offshore structure showing a unfolded first steepness adjustment structure. A lower hull 10 is shown in the first and second views. The lower hull 10 is a portion which is submerged in the water below the water surface 11 and provides buoyancy of a predetermined size. A column 12 is provided on the lower hull 10 substantially perpendicularly. On this column 12, an upper structure such as a deck is installed.

As shown in the figure, the upper and lower sides of the lower hull 10 are provided with a resilient structural member 13 in the form of a letter. The adjustment structural member 13 is provided so as to be horizontally movable as required. That is, when the waves are weak or almost not present, the state as shown in FIG. 1 is maintained. When the waves are severely hit, the adjustment structural member 13 is horizontally moved outward as shown in FIG. When the adjustment structural member 13 maintains the second degree state, the area where the pressure of the water acts becomes wider as the adjustment structural member protrudes laterally, and the upward / downward fluctuation of thelower hull 10 is also suppressed.

In the floating ocean structure to which the present invention as described in the first and second figures is applied, the adjustment structure material 13 is completely exposed to the outside, so that it is easily corroded. Especially, shellfish, seaweed, Is very short. In addition, the prior application does not show any means for horizontally moving the adjustment structural member, and even a person having ordinary skill in the art is not easily able to carry it out.

It is an object of the present invention to provide a vibration damping device for a floating type of offshore structure that adaptively damps the fluctuation of the floating type offshore structure according to the sea condition and also has a long life.

Figure 1 is a partial cross-sectional view of a floating offshore structure to which the present invention is applied.

FIG. 2 is a partial cross-sectional view of a floating offshore structure showing a unfolded first-order adjustment structural member. FIG.

FIG. 3 is a cross-sectional view of a floating offshore structure having a buoyant damping device of a floating offshore structure according to the present invention.

FIG. 4 is a perspective view showing an example of a floating offshore structure to which the present invention is applied.

DESCRIPTION OF THE REFERENCE NUMERALS

110: Reaction 111: Sleep

113: groove 115: watertight bulkhead

120: column 130: superstructure

140: horizontal moving member 142: through hole

150: horizontal movement mechanism 152: cylinder rod

153: Cylinder 154: Bearing

155: Hydraulic motor 156: Tank

157: controller 158: wave detector

An object of the present invention is to provide a floating damping apparatus for a floating structure of an offshore structure having a body having buoyancy of a predetermined size that is submerged in water under water and is coupled to a groove formed inwardly inwardly on the side of the body, And a horizontal movement mechanism for horizontally moving the installed horizontal moving member and the horizontal moving member according to the state of the ocean provided with the offshore structure.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a cross-sectional view of a floating offshore structure in which a floating damping device of a floating offshore structure according to the present invention is installed. FIG. 3 shows the body 110. This body 110 is a portion which is submerged in water under water and provides buoyancy of a predetermined size, and is generally called a lower hull.

A column 120 is provided substantially vertically on the support 110. The upper end of the column 120 protrudes above the water surface 111. The upper structure 130 is installed on the column 120. The superstructure 130 is also commonly referred to as a deck.

As shown in the figure, a groove 113 is formed on one side surface of the supporting body 110 inwardly. It is preferable that the groove 113 has a substantially rectangular cross-sectional shape. A horizontal moving member 140 is coupled to the groove 113. The horizontally moving member 140 is also preferably formed in a hollow rectangular tube shape, and it is preferable to form a plurality of through holes 142 through which water can pass. The horizontal moving member 140 is horizontally movable in a state of being coupled to the groove 113. The horizontally moving member 140 protrudes outwardly from the side of the body 110 according to the state of the sea, thereby alleviating the fluctuation of the offshore structure.

The floating damping apparatus for floating structure according to the present invention includes a horizontal moving mechanism 150 for horizontally moving the horizontal moving member 140. The horizontal movement mechanism 150 is composed of a cylinder rod 152, a cylinder 153, and the like, which will be described below.

As shown in the figure, a cylinder rod 152 is connected to the inner surface of the horizontal moving member 140. The cylinder rod 12 protrudes through the side wall of the support body 110 and is connected to a cylinder 153 provided on the inner side wall of the support body 110. An inner wall of the body 110 through which the cylinder rod 152 penetrates is provided with a bearing 154 for guiding the movement of the cylinder rod 152 and preventing water from penetrating into the cylinder rod 152. A watertight partition wall 115 is provided inside the bearing 154. This watertight partition 115 is for preventing water from penetrating into the body 110 in a double manner.

A hydraulic motor 155 for supplying a predetermined pressure of fluid to the inside of the cylinder 153 or discharging the fluid inside the cylinder 153 is provided above the cylinder 153. A tank 156 .

The hydraulic motor 155 is connected to the controller 157 installed on the inner wall of the column 120 and the controller 157 is connected to the wave detector 158 installed on the outer wall of the column 120. The wave detector 158 is for detecting the state of the sea in which the offshore structure is installed, that is, the wave size, and the controller 157 controls the drive of the hydraulic motor 155 in accordance with the signal applied from the wave detector 158 .

That is, the wave detector 158 detects the wave state and applies a predetermined signal to the controller 157. Then, the controller 157 drives the hydraulic motor 155 to move the cylinder rod 152 horizontally. For example, if the waves are small or almost absent, the cylinder rod 152 is moved inward, and if the waves are floating, the floating structure moves outward. Accordingly, the horizontal moving member 140 moves inward or outward while being coupled to the groove 113.

That is, in the water-free purified water, the horizontally moving member 140 is held in the groove 113 completely without protruding to the side of the body 110. Accordingly, various shellfish, seaweed, etc. are not attached to the surface of the horizontal moving member 140. In this state, if the wave gradually increases, the degree of protrusion of the horizontal shifting member 140 is adjusted according to the size of the wave, and if the wave is very severe, the horizontal shifting member 140 is protruded to the maximum extent.

When the horizontally-moving member 140 protrudes to the side surface of the supporting body 110, the surface area to which the water pressure acts is widened, so that the fluctuation is suppressed. The details of this can be found in detail in FIG. In addition, the water present inside the horizontally moving member 140 acts as an added mass of the body 110, so that the fluctuation of the floating ocean structure is further attenuated.

When the horizontal moving member 140 is disposed so as to protrude from the side surface of the supporting body 110 for a long period of time, various shellfish, seaweeds, etc. stick to the surface of the horizontal moving member 140, Is hooked on the edge of the supporting body 110 when it moves inward.

FIG. 4 is a perspective view showing an example of a floating offshore structure to which the present invention is applied. As shown in FIG. 4, the floating offshore structure includes a pair of supports 110 having a predetermined length. On the body 110, a plurality of columns 120 are arranged before and after a predetermined interval, and are connected to each other by a connecting member 122. On the column 120, an upper structure 130 is installed, and various crane 132 and the like are installed thereon.

As shown in the drawing, a groove 113 described in FIG. 3 is formed on a side surface of the supporting body 110, and a horizontally moving member 140 is horizontally movably installed in the groove 113. A plurality of wave detectors 158 are attached to the surface of the column 120, respectively. Of course, the wave detector 158 may use an accelerometer or the like which can sense the fluctuation of the floating offshore structure, if necessary.

That is, by detecting the sea condition by the wave detector 158 and operating the horizontal moving member 140 according to the detected sea condition, the buzzing of the floating ocean structure can be effectively damped.

As described above, the floating damping system of a floating offshore structure according to the present invention not only dampens the fluctuation of an offshore structure effectively, but also has an advantage over a conventional lifelong lifetime.

Claims (4)

A floating damping device for a floating ocean structure having a buoyancy of a predetermined magnitude that is submerged in water under water, a groove recessed inwardly on a side surface of the floating body; A horizontal moving member coupled to the groove to be horizontally movable; And a horizontally moving mechanism for horizontally moving the horizontally moving member in accordance with the state of the ocean in which the offshore structure is installed. The apparatus of claim 1, wherein the horizontally moving member has a hollow cylindrical shape and has a plurality of through holes through which water can pass. The horizontal movement mechanism according to claim 1, wherein the horizontal movement mechanism includes a cylinder rod connected to a side surface of the horizontally moving member and horizontally protruding through the side surface of the body, a horizontal rod disposed horizontally on the inner wall of the body, A hydraulic motor for supplying a predetermined fluid into the cylinder or discharging a fluid inside the cylinder; a wave detector for detecting a wave condition of the ocean provided with the offshore structure; And a controller for operating the hydraulic motor according to an input signal from the wave detector. The floating structure as claimed in claim 1, wherein a watertight bulkhead is further provided on an inner wall of the body through which the cylinder rod passes.