Experimental Study on the Influencing Factors of Motion Responses on an Air-Floating Caisson with Multiple Compartments  

作　　者：LIU Xianqing ZHANG Puyang ZHAO Mingjie DING Hongyan LE Conghuan LV Nan LUO Sheng 

机构地区：[1]State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300072,China [2]National Engineering Research Center for Inland Waterway Regulation,Chongqing Jiaotong University,Chongqing 400074,China [3]Department of Military Facilities,Army Logistics University of PLA,Chongqing 401331,China

出　　处：《Journal of Ocean University of China》2022年第1期39-48,共10页中国海洋大学学报（英文版）

基　　金：support pro-vided by the National Science Foundation of China(No.52171274);the National Key Research and Development Project(No.2018YFC0810402);the Chongqing Elite In-novation and Entrepreneurship Demonstration Team(No.CQYC201903204);the Chongqing Special Post-doctoral Science Foundation(No.XM2019);the State Key Laboratory of Hydraulic Engineering Simulation and Safety(Tianjin University)(No.HESS-12).

摘　　要：The structure of an air-floating caisson is suitable for the major structure of caisson-type artificial islands.Thus,it has been rapidly developed and widely used in the exploration and development of oil and gas fields in shallow sea and intertidal zones.Air-floating transportation technology is one of the key technologies employed in this structure.In this paper,the factors influencing the dynamic response characteristics of air-floating caisson with multi-compartments(AFCMC)were studied using model tests.The length and the height of each air-floating structure in the model were 1.0 and 0.1 m,respectively.In addition,the 1:100 models with 6,8,and 10 compartments under regular waves were tested in the wave flume,respectively.In the experiments,the respective water depths were set at 0.2,0.3,and 0.4 m,and the corresponding drafts were 0.05,0.06,and 0.07 m.Results show that with the increase of draft,the heave natural period increased and the maximum amplitude of the heave motion decreased.Meanwhile,the pitch motion decreased at 6 and 8 compartments and increased at 10 compartments.As the water depth increased,the maximum amplitude and amplitude change of heave and pitch motions first increased and then decreased.However,several amplitudes close to the maximum amplitude appeared in the measured period at shallower water depth,thereby indicating the vertical movements of the structure enhanced under shallow water.The increase in the number of compartments reduced the vertical movements under 6.0 m draft,but it increased the vertical movements under 5.0 and 7.0 m draft.Thus,increasing the number of compartments has a limited capacity to improve the motion performance of the structure.

关 键 词：air-floating caisson structure response amplitude operator(RAO) draft water depth COMPARTMENT 

分 类 号：U655.54[交通运输工程—港口、海岸及近海工程] P756.8[交通运输工程—船舶与海洋工程]