Loads and Dynamic Response Characteristic on FPSO Under Internal Solitary Waves  

作　　者：ZHANG Rui-rui LI Cui PU Chun-rong LIU Qian YOU Yun-xiang 

机构地区：[1]School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212100,China [2]China Resources(Nanjing)Municipal Design Co.,Ltd.,Nanjing 315100,China [3]State Key Laboratory of Ocean Engineering,Shanghai Jiaotong University,Shanghai 200240,China

出　　处：《China Ocean Engineering》2024年第5期785-796,共12页中国海洋工程（英文版）

基　　金：supported by JUST start-up fund for science research,the Jiangsu Natural Science Foundation(Grant No.BK20210885).

摘　　要：According to the established prediction model of internal solitary wave loads on FPSO in the previous work,the lumped mass model and the movement equations of finite displacement in time domain,the dynamic response model of interaction between internal solitary waves and FPSO with mooring lines were established.Through calculations and analysis,time histories of dynamic loads of FPSO exerted by internal solitary waves,FPSO’s motion and dynamic tension of mooring line were obtained.The effects of the horizontal pretension of mooring line,the amplitude of internal solitary wave and layer fluid depth on dynamic response behavior of FPSO were mastered.It was shown that the internal solitary waves had significant influence on FPSO,such as the large magnitude horizontal drift and a sudden tension increment.With internal solitary wave of −170 m amplitude in the ocean with upper and lower layer fluid depth ratio being 60:550,the dynamic loads reached 991.132 kN(horizontal force),18067.3 kN(vertical force)and−5042.92 kN·m(pitching moment).Maximum of FPSO’s horizontal drift was 117.56 m.Tension increment of upstream mooring line approached 401.48 kN and that of backflow mooring line was−140 kN.Moreover,the loads remained nearly constant with different pretension but increased obviously with the changing amplitude and layer fluid depth ratio.Tension increments of mooring lines also changed little with the pretension but increased rapidly when amplitude and layer fluid depth ratio increased.However,FPSO’s motion increased quickly with not only the horizontal pretension but also the amplitude of internal solitary wave and layer fluid depth ratio.

关 键 词：internal solitary wave(ISW) dynamic response FPSO dynamic loads tension increment 

分 类 号：P731.2[天文地球—海洋科学] P75[交通运输工程—船舶及航道工程] U674.38[交通运输工程—船舶与海洋工程]