JP2001130480A - Offshore structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an offshore structure capable of effectively reducing, with a simple device, a rolling caused by ocean waves and wind. SOLUTION: This offshore structure comprises an upper structure 4 having an underwater structural body 5 projected from a bottom surface to the underside and a floating body 3 having an outer shell body 6 extending to an underwater and filled with water therein. The upper structure 4 is installed on the floating body 3 with the underwater structural body 5 inserted into the outer shell body 6, and supported by an attitude control device 7 operated by a signal from a controller. The attitude control device 7 comprises an actuator 16 for vertical control and an actuator 17 for horizontal control. A motion detecting sensor 19 installed on the floating body 3 is connected electrically to the controller 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an offshore structure.

[0002]

2. Description of the Related Art Floating marine structures such as marine airports and marine buildings are susceptible to wind and waves, and the resulting shaking has a great effect on the habitability of people living there. Therefore, in order to reduce such fluctuation, a marine structure 22 having an active control device 21 as shown in FIG. 6 has been developed. This is because the upper structure 23 has vertical and horizontal hydraulic cylinders 2.
The hydraulic cylinders 24, 25 are installed on the floating body 26 through 4, 25, and reduce the sway of the upper structure 23 by expansion and contraction of the hydraulic cylinders 24, 25.

[0003]

However, in the above-mentioned marine structure, since the vertical load of the building is borne by the vertical hydraulic jack, the size of the apparatus becomes large and the hydraulic jack is adapted to the size of the building. The control system became complicated because of the increase. Further, the above-mentioned marine structure requires more complicated control in consideration of the deformation of the floating body due to waves.

[0004] The present invention has been made in view of the above problems, and an object of the present invention is to provide a marine structure capable of effectively reducing sway with a simple device.

[0005]

Means for achieving the above object are achieved by the invention according to claim 1 which comprises an upper structure having an underwater body projecting downward from the bottom surface, And a floating body having an outer shell filled with water.The upper structure is installed on the floating body with the underwater body inserted into the outer shell, and is operated by a signal from a controller. It is supported by a posture control device, the posture control device is composed of a vertical control actuator and a horizontal control actuator, and the controller is electrically connected to a motion detection sensor installed on a floating body. .

According to the first aspect of the present invention, since the upper structure is installed on the floating body with the underwater body inserted into the outer shell, the vertical load applied to the support control device is reduced. In addition, when the motion detection sensor detects the rotational motion of the floating body, such as roll or pitch, the controller calculates the expansion / contraction length of the vertical control actuator in accordance with the detected motion, and based on the calculated value, the vertical control actuator is used. To reduce the rotational movement. Similarly, when a translational motion such as swaying of the floating body from side to side or back and forth is detected by the motion detection sensor, the controller calculates the expansion and contraction length of the horizontal control actuator in accordance with the detection, and based on the calculated value, The rotational motion is reduced by expanding and contracting the control actuator.

According to a second aspect of the present invention, there is provided an upper structure having an underwater body protruding downward from a bottom surface, and a floating body having an outer shell extending in water and filled with water inside. The upper structure is installed on a floating body with the underwater body inserted into the outer shell, and is supported by a support controller and a posture controller operated by a signal from a controller,
The support control device includes a plurality of support devices each having a hydraulic cylinder installed on a seismic isolation isolator, and a hydraulic control device that controls expansion and contraction of each of the hydraulic cylinders. The attitude control device includes a vertical control actuator. And a horizontal control actuator, wherein the controller is electrically connected to a motion detection sensor installed on the floating body.

According to the second aspect of the present invention, since the upper structure is installed on the floating body with the underwater body inserted into the outer shell, the vertical load applied to the support control device is reduced. In addition, since the upper structure is installed on the floating body in a state where it can be rotated in the vertical direction and the horizontal direction by the support control device, the rotational motion of the floating body, such as horizontal or vertical swing, is prevented by the expansion and contraction of each hydraulic cylinder. The superstructure is always kept horizontal.
In addition, translational movements such as swaying of the floating body and side-to-side sway are reduced by the seismic isolation isolators. In addition, when a rotational motion such as a horizontal or vertical swing of the floating body is detected by the motion detection sensor, the controller calculates the expansion / contraction length of the vertical control actuator in accordance with the detected motion, and the vertical control actuator is calculated based on the calculated value. To reduce the rotational movement. Similarly, when a translational motion, such as swaying of the floating body from side to side or back and forth, is detected by the motion detection sensor, the controller calculates the expansion and contraction length of the horizontal control actuator in accordance with the detection, and based on the calculated value, The rotational motion is reduced by expanding and contracting the control actuator. As described above, the sway of the floating body is attenuated by the support control device and the attitude control device, so that the upper structure is always kept horizontal and the amount of sway (displacement) is reduced.

According to a third aspect of the present invention, in the first aspect, the outer shell is an aquarium for a marine organism, and the underwater body is provided with a view window through which the marine organism can be viewed, so that the outer shell can also enjoy underwater. It is characterized by having a viewing window.

According to the third aspect of the present invention, fish and the like in the outer shell can be viewed from the viewing window provided in the underwater body, and fish in the water can be viewed through the viewing window provided in the outer shell. be able to.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an offshore structure will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view of the marine structure according to the first embodiment, and FIG. 2 is a plan view of the marine structure. The marine structure 1 has a floating body 3 floating on a sea surface 2 and a floating body 3 installed on the floating body 3. And an upper structure 4.

The upper structure 4 has an underwater body 5 protruding downward from the bottom surface inserted into an outer shell 6 on the bottom surface of the floating body.
It is supported by a posture control device 7 operated by a signal from a controller. Since the outer shell 6 is filled with the seawater 2a, the buoyancy acting on the underwater skeleton 5 reduces the vertical load of the upper structure 4 applied to the attitude control device 7. The marine structure 1 can be used as an aquarium by using the outer shell 6 as an aquarium for marine organisms such as fish, and the fish and the like in the outer shell 6 can be viewed from the view window 5a provided in the underwater skeleton 5. In addition to this, it is possible to view underwater fish and the like through a viewing window 6a provided in the outer shell 6.

The attitude control device 7 includes a vertical control actuator 8 installed between the upper structure 4 and the floating body 3.
And a horizontal control actuator 9 installed between the upper structure 4 and the side wall 3a. Each of the cylinders 8, 9 is provided with a controller 10 mounted on the upper structure 4.
The motion detection sensor 11 mounted on the floating body 3 is electrically connected to the controller 10. Note that the motion detection sensors 11 can be provided at the four corners of the upper structure 4.

Therefore, when the rotational motion of the floating body 3 such as the rolling and pitching is detected by the motion detecting sensor 11,
In response, the controller 10 calculates the length of expansion and contraction of the vertical control actuator 8, and based on the calculated value, the vertical control actuator 8 is expanded and contracted to reduce the rotational movement. Similarly, when the translational motion such as the lateral sway and the forward / backward sway of the floating body 3 is detected by the motion detection sensor 11, the controller 10 calculates the expansion / contraction length of the horizontal control actuator 9 in response thereto, and calculates the calculated value. , The horizontal control actuator 9 expands and contracts to reduce the rotational movement.

FIG. 3 is a sectional view of the marine structure 12 according to the second embodiment, and FIG. 4 is a plan view of the same. The upper structure 4 is supported by a support control device 13 in addition to the attitude control device 7. Only the point is different from the offshore structure 1 of the first embodiment.

The support control device 13 includes a plurality of support devices 1.
The upper structure 4 is supported by a plurality of support devices 14 provided between the floating body 3 and the upper structure 4 and is kept horizontal. The support device 14 has a hydraulic cylinder 1 on a seismic isolation isolator 16 in which rubber plates and steel plates are alternately overlapped.
7 are installed and support the upper structure 4 in a state where it can rotate vertically and horizontally. The hydraulic control device 15 includes a hydraulic tank 18 and a hydraulic pump 19. Each hydraulic cylinder 17 is connected to the hydraulic tank 18 by a hydraulic hose 20. When the oil is fed to the cylinder 17, the upper structure 4 separates from the floating body 3, but when the oil is collected, the upper structure 4 approaches the floating body 3 to be in a state as shown in FIG.

When the clockwise rotational movement as shown in FIG. 5B occurs in the floating body 3, one hydraulic cylinder 17a contracts and the other hydraulic cylinder 17b expands to cancel the rotational movement. Thereby, the upper structure 4 is always kept horizontal. Also, as shown in (3) of the figure, when a rotational movement counterclockwise occurs, the hydraulic cylinders 17a and 17b expand and contract to cancel the rotational movement as described above.
Further, when a translational motion such as swaying from side to side and swaying back and forth occurs in the floating body 3, this is reduced by the seismic isolation isolator 16 so as not to be transmitted to the upper structure 4.

Therefore, the marine structure is attenuated by the attitude control device 7 and the support control device 13 to attenuate the motion of the floating body 3 caused by wind, waves, etc., so that the upper structure 4 is always kept horizontal and its motion (displacement) is maintained. ) The amount is reduced.

[0019]

According to the present invention, since the upper structure is installed on the floating body with the underwater body inserted in the outer shell, the vertical load applied to the attitude control device or the support control device can be reduced.

The superstructure can be installed on a floating body so as to be rotatable vertically and horizontally.

Since the hydraulic cylinder of the support control device that bears the load of the upper structure and the vertical control actuator and the horizontal control actuator of the attitude control device are independent of each other, the vertical control actuator and the horizontal control of the attitude control are provided. Actuator can be made smaller.

The upper structure can be rotated vertically and horizontally by a supporting device in which a hydraulic cylinder is installed on a seismic isolation isolator in which rubber plates and steel plates alternately overlap.

The fish in the outer shell can be viewed through the viewing window provided in the underwater body, and the fish in the water can be viewed through the viewing window provided in the outer shell.

[Brief description of the drawings]

FIG. 1 is a sectional view of a marine structure according to a first embodiment.

FIG. 2 is a plan view of the marine structure according to the first embodiment.

FIG. 3 is a cross-sectional view of a marine structure according to a second embodiment.

FIG. 4 is a plan view of an offshore structure according to a second embodiment.

FIGS. 5 (1) to (3) are conceptual diagrams showing the operation of the support control device.

FIG. 6A is a cross-sectional view of a conventional offshore structure, and FIG. 6B is a plan view of the same.

[Explanation of symbols]

 1, 12, 22 Marine structure 2, Sea surface 3, 26 Floating body 4, 23 Upper structure 5 Underwater body 6 Outer shell 7 Attitude control device 8 Vertical control actuator 9 Horizontal control actuator 10 Controller 11 Motion detection sensor 13 Support control Device 14 Support device 15 Hydraulic control device 16 Isolation isolator 17, 24, 25 Hydraulic cylinder 18 Hydraulic tank 19 Hydraulic pump 20 Hydraulic hose 21 Active control device

Claims (3)

[Claims] 1. An upper structure comprising an underwater body projecting downward from a bottom surface, and a floating body having an outer shell extending into water and filled with water therein. Is installed on a floating body with the underwater body inserted into the outer shell, and supported by a posture control device operated by a signal from a controller, the posture control device includes a vertical control actuator and a horizontal control actuator. Composed of
A marine structure, wherein a motion detection sensor mounted on a floating body is electrically connected to the controller. 2. The upper structure, comprising: an upper structure having an underwater body projecting downward from a bottom surface; and a floating body having an outer shell body that extends into the water and is filled with water therein. Is installed on a floating body with the underwater body inserted in the outer shell, and is supported by a support control device and an attitude control device operated by a signal from the controller, and the support control device is a seismic isolation isolator. It is composed of a plurality of support devices having a hydraulic cylinder installed thereon, and a hydraulic control device that controls expansion and contraction of each of the hydraulic cylinders, and the attitude control device is composed of a vertical control actuator and a horizontal control actuator. A marine structure, wherein a motion detection sensor installed on a floating body is electrically connected to the controller. 3. The outer shell is an aquarium for marine organisms, an underwater body is provided with a viewing window through which the marine organisms can be viewed, and the outer shell is also provided with a viewing window through which water can be viewed. Item 3. An offshore structure according to item 1.