摘要
基于切片理论对一艘新型破冰船的运动响应进行分析,采用计算流体力学(CFD)方法对船体自由横摇衰减进行模拟,得出其无因次衰减系数,进而对船舶在各海况下的典型航态进行耐波性分析和短期预报,比较相关耐波性衡准,确定船舶航行过程中遇到的危险工况和晕船概率,并对比船体加装减摇水舱前后的横摇运动响应。结果表明,该船型线特殊,耐波性较差,在5级海况、横浪条件下,垂荡响应最为明显,且加速度均方根值最大;随着浪向角的改变,横摇有义最大幅值可能达到14.68°,并超出衡准,纵摇有义幅值维持在1.98°以下,且响应变化并不显著;在迎浪状态下航行2 h以上容易出现晕船现象,应尽量避免。此外,加装减摇水舱前后船体的运动响应差异明显,减摇水舱的应用效果显著。
Based on the strip theory,the motion response of a new icebreaker is analyzed.The CFD method is used to simulate the free-roll damping of the ship to obtain the dimensionless roll extinction coefficient.The seakeeping performance analysis and short-term forecast of the typical navigation condition under various sea conditions are carried out while the relevant seakeeping criteria are compared.The dangerous condition in the navigation and motion sickness incidence are determined.The roll motion response before and after the installation of the anti-rolling tank is compared.Results show that the ship has special lines and poor seakeeping performance,in the five-level sea state,the heave response under beam wave conditions is the most obvious and the root mean square value of acceleration is the highest,and as the wave angle changes,the maximum significant number of roll amplitude may reach 14.68°and exceed the criterion,and the significant number of pitch motion response is maintained below 1.98°and the response changes are not significant.Seasickness is likely to occur when sailing for two hours or more in head sea conditions,which should be avoided as much as possible.In addition,the hull motion response contrast is obvious before and after the installation of the anti-rolling tank,the application effect of the anti-rolling tank is significant.
作者
李兴宇
何炎平
刘亚东
陈超
LI Xingyu;HE Yanping;LIU Yadong;CHEN Chao(Shanghai Jiao Tong University,State Key Laboratory of Ocean Engineering,Ocean and Civil Engineering,Shanghai 200240,China;Shanghai Jiao Tong University,Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE),Ocean and Civil Engineering,Shanghai 200240,China;Shanghai Jiao Tong University,School of Naval Architecture,Ocean and Civil Engineering,Shanghai 200240,China)
出处
《船舶工程》
CSCD
北大核心
2021年第7期18-24,93,共8页
Ship Engineering
基金
上海交通大学科技创新专项基金(No.18X150010006)。
关键词
破冰船
切片理论
耐波性
短期预报
icebreaker
strip theory
seakeeping
short term prediction
