Classification and Comparison of Wave Impact Modes on Semi-Submersibles  

作　　者：GUO Ying-hao XIAO Long-fei WEI Han-di LI Xin LI Lei DENG Yan-fei 

机构地区：[1]State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [2]SJTU-Sanya Yazhou Bay Institute of Deepsea Technology,Hainan 572024,China [3]CIMC Offshore Co.Ltd.,Shenzhen 518000,China

出　　处：《China Ocean Engineering》2021年第2期161-175,共15页中国海洋工程（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Grant No.51879158);the 7th Generation Ultra Deep Water Drilling Unit Innovation Project by the Ministry of Industry and Information Technology of China.

摘　　要：Semi-submersibles for offshore oil exploration and exploitation often suffer from severe wave impacts in extreme ocean environments.Owing to the complex wave interactions among structural components of semi-submersibles,in-depth analyses on the characteristics of wave impact events are of significance for both industry and academia.An experimental study was carried out to investigate the local wave impact loads on a semi-submersible,with focus on understanding the wave impacts by identifying typical impact modes.Quantitative criteria are proposed to classify major wave impacts on the semi-submersible into six modes and two types.The results show that the classification is reasonable and provides valuable information for studying wave impacts on semi-submersibles.The incident wave characteristics at the fore column of the semi-submersible have important influence on the wave impact mode.The fore-column dominating wave impacts exert the most intense loads on the fore column and feature well-developed breaking waves or slightly breaking waves at the fore column.However,the aft-column dominating wave impacts exert the most intense loads on the aft column or the deck bottom and feature non-breaking waves at the fore column.Energy loss during the fore-column impact weakens the impact severity on the aft column in the fore-column dominating wave impacts.The shoaling effect of the submerged pontoon and different motion configurations of the platform result in higher occurrence rate of the aft-column dominating wave impacts.Different impact modes are also distinguished by different spatial distributions of wave impact loads.

关 键 词：wave impact load SEMI-SUBMERSIBLE wave breaking energy loss shoaling effect 

分 类 号：P75[天文地球—海洋科学] TE95[石油与天然气工程—石油机械设备]