JP2010228503A5 - - Google Patents

Description

In order to solve the above-described problem, a floating offshore structure rocking device according to the present invention corresponding to claim 1 is mounted on a floating offshore structure, and the floating body reduces vibration of the floating offshore structure. a swinging motion reducing apparatus of formula marine structures, up and down direction upper side opening which serves as an air inlet and outlet are formed on the upper end side to the co the lower end opening serving as a water inlet and outlet at the lower end side is formed and open down rocking tank extends, provided with driving means for driving the open-type down rocking tank, said open-type down rocking tank is movably supported in the vertical direction, vertical in front Stories drive means The position of the direction can be controlled. The open-type anti-vibration tank is disposed on both sides of the open-type anti-vibration tank, for example, and has a pair of guide bars extending in the vertical direction and an opening through which the guide bar passes, and is formed on both sides of the open-type anti-vibration tank. Each of the fixed guide pieces can be supported so as to be movable in the vertical direction. Moreover, as a drive means, it can comprise with the crane which hangs an open type anti-vibration tank and raises / lowers.

Furthermore, in the rocking device for a floating offshore structure according to the present invention, the open-type rocking tank can adjust the water depth at which the lower end side opening is positioned by the driving means .

According to a sixth aspect of the present invention, there is provided a floating offshore structure rocking device according to the present invention, which is mounted on a floating offshore structure and reduces the fluctuation of the floating offshore structure. an apparatus, lower end open, down swinging of the upper end-side opening which serves as an air inlet and outlet on end co the lower end opening serving as the water entrance is formed extending in the up and down direction is formed in the a tank, provided with an internal water control means for controlling the state of the internal water in the open, down rocking tank, according to the size of the internal water control means, the natural period of the open down rocking tank It is controllable. The internal water control means can be constituted by a float member arranged in an open type anti-vibration tank.

According to a eighth aspect of the present invention, there is provided a floating offshore structure rocking apparatus according to the present invention, which is mounted on a floating offshore structure and reduces the fluctuation of the floating offshore structure. A telescopic device having a lower anti-vibration tank having a lower end opening functioning as a water inlet / outlet on the lower end side and an upper anti-vibration tank having an upper end opening functioning as an air inlet / outlet on the upper end side An open type anti-vibration tank having a structure, and a driving means for driving the lower anti-vibration tank, wherein the lower end side opening is in an underwater state, and the lower end side opening is withdrawn from the water surface. The lower agitating tank can be moved by the driving means.

Claims (11)

A floating marine structure vibration reduction device that is mounted on a floating marine structure and reduces the fluctuation of the floating marine structure,
And open down rocking tank upper side opening extending in up and down direction is formed which functions as an air inlet and outlet on end co the lower end opening is formed on the lower side functions as a water entrance,
Driving means for driving the open type anti-vibration tank,
The open down rocking tank is movably supported in the vertical direction, the swinging motion reducing apparatus floating offshore structure, characterized in that in front SL drive means can control the position in the vertical direction.   2. The apparatus for reducing a floating offshore structure according to claim 1, further comprising an opening area adjusting means for adjusting an area of the opening on the lower end side of the open type anti-vibration tank.   3. The apparatus for reducing a floating offshore structure according to claim 1, further comprising resistance means for imparting frictional resistance to water in the open type anti-vibration tank.   The open-type anti-vibration tank is movable by the driving means between an operating state in which the lower end opening is located in water and a retracted state in which the lower end opening is lifted from the water surface. 4. A rocking device for a floating offshore structure according to any one of 1 to 3. 5. The vibration reduction of the floating offshore structure according to claim 1, wherein the open-type anti- vibration tank is capable of adjusting a water depth at which the lower end side opening is located by the driving means. apparatus. A floating marine structure vibration reduction device that is mounted on a floating marine structure and reduces the fluctuation of the floating marine structure,
And open down rocking tank upper side opening extending in up and down direction is formed which functions as an air inlet and outlet on end co the lower end opening is formed on the lower side functions as a water entrance,
An internal water control means for controlling the state of the internal water in the open type anti-vibration tank,
Depending on the size of the internal water control means, the swinging motion reducing apparatus floating offshore structure, characterized in that the natural period is controllable in the open, down rocking tank.   7. The apparatus for reducing a floating offshore structure according to claim 6, wherein the internal water control means is controlled to move in the vertical direction in the open type anti-vibration tank. A floating marine structure vibration reduction device that is mounted on a floating marine structure and reduces the fluctuation of the floating marine structure,
  Open-type reduction of a telescopic structure having a lower anti-vibration tank having a lower end opening functioning as a water inlet / outlet on the lower end side and an upper anti-vibration tank having an upper end opening functioning as an air inlet / outlet on an upper end side Comprising a rocking tank and driving means for driving the lower anti-shake tank,
The floating marine structure, wherein the lower rocking tank can be moved by the driving means between an operating state in which the lower end opening is located in water and a retracted state in which the lower end opening is lifted from the water surface. Thing attenuator.   9. The reduction of the floating offshore structure according to any one of claims 1 to 5, wherein the position of the open type anti-vibration tank is controlled by the driving means according to draft or sea conditions. Rocking device. A floating marine structure vibration reduction device that is mounted on a floating marine structure and reduces the fluctuation of the floating marine structure,
A float board that absorbs the energy of waves by facing the water surface,
Driving means for driving the float plate,
The floating plate is supported so as to be movable in a vertical direction or a rotational direction with one end as an axis, and the position relative to the water surface can be controlled by the driving means according to the situation. Thing attenuator.   The said float board is movable to the operation state which faces the water surface with the said drive means, and the retracted state pulled up from the water surface, The rocking | fluctuation apparatus of the floating type marine structure of Claim 10 characterized by the above-mentioned.