An Estimation of Internal Soliton Forces on a Pile in the Ocean  

作　　者：DU Tao SUN Li ZHANG Yijun BAO Xianwen FANG Xinhua 

机构地区：[1]Physical Oceanography Laboratory, Ocean University of China, Qingdao 266003, P. R. China [2]National Marine Data and Information Service, Tianjin 300171, P. R. China [3]Shanghai Flood Risk Information Center, Shanghai 200050 ,P R. China

出　　处：《Journal of Ocean University of China》2007年第2期101-106,共6页中国海洋大学学报（英文版）

基　　金：This study is supported by the National Natural Science Foundation of China(Projects under contract Nos.40506007,49676275 and 49976002);the Natural Science Foundation of Shandong Province(No.Y2000E04);Microwave Imaging National Key Laboratory Foundation(No.51442020103JW1002).

摘　　要：Internal soliton forces on oil-platform piles in the ocean are estimated with the Morison Formula. Different from sur- face wave forces, which change only in magnitude along a pile, internal soliton forces can be distributed over the entire pile in the water and they change not only in magnitude but also in direction with depth. Our calculations show that the maximum total force caused by a soliton with its associated current of 2.1 m s-1 is nearly equal to the maximum total force exerted by a surface wave with a wavelength of 300 m and a wave-height of 18 m. The total internal soliton force is large enough to affect the operations of marine oil platforms and other facilities. Therefore, the influence of internal solitons should not be neglected in the design of oil platforms.Internal soliton forces on oil-platform piles in the ocean are estimated with the Morison Formula. Different from sur face wave forces, which change only in magnitude along a pile, internal soliton forces can be distributed over the entire pile in the water and they change not only in magnitude but also in direction with depth. Our calculations show that the maximum total force caused by a soliton with its associated current of 2.1 ms-1 is nearly equal to the maximum total force exerted by a surface wave with a wavelength of 300 m and a wave-height of 18 m. The total internal soliton force is large enough to affect the operations of marine oil platforms and other facilities. Therefore, the influence of internal solitons should not be neglected in the design of oil platforms.

关 键 词：oceanic internal wave internal soliton internal soliton force ocean oil platform 

分 类 号：TE95[石油与天然气工程—石油机械设备]