极限海况下多连通域浮式平台内域水体运动特性研究  

Research on Inner Water Movement of Floating Platform with Multi Connected Underwater Domain under Extreme Sea State

作　　者：凌宏杰[1] 王志东[1] 刘永涛[1] LING Hongjie;WANG Zhidong;LIU Yongtao(College of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China)

机构地区：[1]江苏科技大学船舶与海洋工程学院,镇江212003

出　　处：《中国造船》2022年第3期179-190,共12页Shipbuilding of China

摘　　要：若浮式平台内存在多个大尺度、形状不规则的连通水域,在波浪作用下可能出现驻波及水体共振现象。基于黏性流理论,采用动网格技术,耦合求解平台运动方程,构建了平台运动响应的数值预报方法。分析极限海况下平台内域流体非线性运动特性,探讨平台运动自由度对内域中流体运动的影响。研究表明:当波陡超过0.083时,会出现驻波现象;当波陡小于0.083时,会出现水体共振现象。内域中波高分布呈非对称形态,G域后缘区域波高约为前缘区域的2.8倍,比波高的最大值为1.16。与垂荡运动相比,平台纵摇运动对内域波高及其分布的影响最大。研究成果对多连通域浮式平台的设计具有指导意义。There are many large scale and irregularly connected water areas in the floating platform with multiconnected underwater domain,where wave system is complex.Standing wave and water body resonance may occur,which makes the wave surface in the internal area increasing sharply so as to threaten the safety of the platform.Based on the theory of viscous flow,the dynamic grid technology is used to solve motion equations of the platform,and a numerical method of predicting response of the platform motion is constructed.Nonlinear motion of fluid in the platform under extreme sea conditions is analyzed,and the influence of degrees of freedom of the platform motion on the fluid motion in the platform is discussed.The results show that when wave steepness is greater than 0.083,the standing wave phenomenon appears;when wave steepness is less than 0.083,resonance of water body occurs.The wave height at the trailing edge in Gregion is about2.8 times that at the leading edge,and maximum specific wave height at the trailing edge is 1.16.Compared with the heave motion,pitch motion of the platform has greater influence on the wave height and its distribution in the inner domain.The research results have instructional significance for the design of a floating platform with multi-connected domain.

关 键 词：多连通域平台 驻波 共振现象 运动响应 

分 类 号：U674.38[交通运输工程—船舶及航道工程]