渔船随浪、尾斜浪下骑浪/横甩直接数值模拟  

Direct numerical simulation of fishing boat riding/broaching in following and oblique waves

作　　者：张宝吉 陈思源 ZHANG Baoji;CHEN Siyuan(College of Ocean Science and Engineering,Shanghai Maritime University,Shanghai 201306,China;Merchant Marine College,Shanghai Maritime University,Shanghai 201306,China)

机构地区：[1]上海海事大学海洋科学与工程学院,上海201306 [2]上海海事大学商船学院,上海201306

出　　处：《华中科技大学学报（自然科学版）》2021年第4期44-49,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51779135)。

摘　　要：为了更加准确地评估船舶在波浪中航行的安全性,以四自由度操纵性方程为基础,研究增加艏向角和浪向角以改变船舶航向、增加舵角控制方程来模拟舵效下降、增加横摇角参数来判断船舶是否倾覆,以及打出最大舵角仍然无法保持航向等典型横甩现象.以国际船模试验池会议船(ITTC ship)A2渔船为例,在波长船长比为1、波陡为1/15的海况下,进行随浪和尾斜浪海况模拟.通过突然改变的理念成功模拟出该船的典型横甩现象,并将部分模拟数据同已有试验值进行了对比,结果符合较好.在此基础上,进行了波浪参数分析,研究了不同波长船长比、不同螺旋桨转速、不同波陡下的船舶运动规律.To evaluate the safety of ships sailing in waves more accurately, based on the 4-DOF(degree of freedom)manoeuvrability equation,studies were carried out to change the ship’s course by increasing the heading angle and wave direction angle,and to simulate the typical broaching phenomena such as the rudder efficiency decreasing by adding the rudder angle control equation,judging whether the ship capsized or not by adding roll angle parameter,and failure to maintain the course even under the maximum rudder angle. By taking International Towing Tank Conference(ITTC) ship A2 fishing boat as an example, the following and oblique wave were simulated under the sea conditions of wave length to ship length ratio of 1 and wave steepness of 1/15.The typical phenomenon of the ship’s broaching was successfully simulated by the concept of sudden change, and part of the simulation data were compared with the existing experiments,showing their good agreement.On this basis,the wave parameters were analyzed,and the law of the ship motion under different wave length to ship length ratio,propeller speed and wave steepness was studied.

关 键 词：二代完整稳性 骑浪 横甩 直接数值模拟 ITTC ship A2渔船 

分 类 号：U661.I1[交通运输工程—船舶及航道工程]