Rolling reduction apparatus of floating structure

Abstract

A rolling reduction apparatus includes a pair of plate members attached to both ends in a width direction on a bottom of a floating structure. Each of the plate members has a plurality of through-holes arranged in a longitudinal direction of the floating structure. The rolling motion of the floating structure is reduced because eddies are formed to consume energy when water passes through the through-holes.

1 . A rolling reduction apparatus comprising:
 a pair of plate members attached to both ends in a width direction on a bottom of a floating structure,   wherein each of said plate members comprises a plurality of through-holes arranged in a longitudinal direction of said floating structure.   
     
     
         2 . The rolling reduction apparatus according to  claim 1 , wherein an upper end of each of the pair of plate members is firmly attached to the bottom of said floating structure. 
     
     
         3 . The rolling reduction apparatus according to  claim 1 , wherein the pair of plate members is attached to said floating structure by a support member to form a space between each of said plate members and said floating structure. 
     
     
         4 . The rolling reduction apparatus according to  claim 1 , further comprising:
 a control unit which controls an opening area of said plurality of through-holes.   
     
     
         5 . The rolling reduction apparatus according to  claim 4 , wherein each of said plate members comprises:
 a first plate; and   a second plate fixed on said floating structure,   wherein said first plate and said second plate overlaps with each other such that a first through-hole of through-holes formed in said first plate and a second through-hole of through holes formed in said second plate overlap with each other, and   wherein said control unit slides said first plate along said second plate.   
     
     
         6 . A floating structure comprising the rolling reduction apparatus which comprises:
 a pair of plate members attached to both ends in a width direction on a bottom of a floating structure,   wherein each of said plate members comprises a plurality of through-holes arranged in a longitudinal direction of said floating structure.   
     
     
         7 . The floating structure according to  claim 6 , wherein an upper end of each of the pair of plate members is firmly attached to the bottom of said floating structure. 
     
     
         8 . The floating structure according to  claim 6 , wherein the pair of plate members is attached to said floating structure by a support member to form a space between each of said plate members and said floating structure. 
     
     
         9 . The floating structure according to  claim 6 , further comprising:
 a control unit which controls an opening area of said plurality of through-holes.   
     
     
         10 . The floating structure according to  claim 9 , wherein each of said plate members comprises:
 a first plate; and   a second plate fixed on said floating structure,   wherein said first plate and said second plate overlaps with each other such that a first through-hole of through-holes formed in said first plate and a second through-hole of through holes formed in said second plate overlap with each other, and   wherein said control unit slides said first plate along said second plate.