船首外飘砰击载荷的数值预报  

Numerical prediction of bowflare slamming loads

作　　者：于鹏垚 卢雷 甄春博[1] 王天霖[1] YU Peng-yao;LU Lei;ZHEN Chun-bo;WANG Tian-lin(Transportation Equipment and Ocean Engineering College, Dalian Maritime University, Dalian 116026, China;China Ship Design and Research Center Corporation, Dalian 116001, China)

机构地区：[1]大连海事大学交通运输装备与海洋工程学院,辽宁大连116026 [2]中船重工船舶设计研究中心有限公司,辽宁大连116001

出　　处：《舰船科学技术》2018年第3期35-41,共7页Ship Science and Technology

基　　金：中央高校基本科研业务费资助项目(3132017032);国家重点研发计划重点专项资助项目(2016YFC0301500)

摘　　要：本文采用显式有限元方法预报船首外飘砰击载荷。通过对比小尺度外飘模型的自由落体砰击试验值和相应的数值模拟结果,验证了该方法在预报船首外飘砰击载荷方面的可行性。针对2种不同结构形式的实船尺度的外飘剖面,预报了剖面在船体与波浪相对运动规律下的砰击载荷,研究了流动分离后的二次砰击现象,并进一步探讨了网格密度和接触刚度参数对不同剖面形式外飘砰击载荷的影响。An explicit finite element method is adopted to forecast bowflare slamming loads. By comparing the free falling test values of a small-scale bowflare model with the corresponding numerical simulation results, the numerical method proves reliable to forecast bowflare slamming loads. Through simulating the slamming process of two different bowflare sections of real ship scale, on the condition that the track of the sections is consistent with the relative movement between the hull and the wave, the secondary slamming phenomenon after flow separation is studied and the effects of mesh density and contact stiffness parameters on bowflare slamming loads are further explored.

关 键 词：显示有限元 外飘砰击载荷 流动分离 二次砰击 

分 类 号：U661[交通运输工程—船舶及航道工程]