基于流固耦合的救生筏海锚阻力性能分析  

Analysis on resistance performance of sea anchor of life raft based on fluid-solid interaction

作　　者：王浙 李楷[1] 董立佳 张璐琦 王运龙[1] WANG Zhe;LI Kai;DONG Lijia;ZHANG Luqi;WANG Yunlong(School of Naval Architecture and Ocean Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学船舶工程学院,辽宁大连116024

出　　处：《大连理工大学学报》2024年第6期606-614,共9页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(51509033);中央高校基本科研业务费专项资金资助项目(DUT19JC51).

摘　　要：救生筏是提高航行安全的海上救生设备.作为救生筏附件,海锚能有效降低恶劣海况下救生筏的漂移速度,提高其稳定性.为对海锚进行阻力性能分析,基于Star-CCM+与LS-DYNA软件对其水中工作过程及阻力性能进行研究,建立了可透气柔性体海锚的流固耦合动力学模型与不考虑救生筏受风影响变形的刚性体模型.对救生筏在海上典型风速条件下的漂移速度及海锚的减速效果进行了数值模拟,对不同救生筏漂移速度下海锚的阻力性能和结构变形进行了综合分析.修正了救生筏筏体总阻力的前体尾流影响与刚-柔性体海锚转换影响.柔性体海锚的阻力拟合公式与文献中的相似性证明了数值模拟的可靠性.结果表明海锚可有效降低救生筏的漂移速度,提高救生筏被捕救的可能性.The life raft is used as life-saving equipment at sea to improve navigation safety.As the attachment of the life raft,the sea anchor can effectively reduce the drift velocity of the life raft in rough sea conditions and also improve its stability.To analyze the resistance performance of the sea anchor,the underwater working process and resistance performance of sea anchors are investigated by using Star-CCM+and LS-DYNA softwares.A fluid-solid coupled dynamics model of a permeable flexible body sea anchor and a rigid body model without considering the deformation of the life raft after being affected by wind are developed.The drift velocity of the life raft and the deceleration effect of the sea anchor under typical wind speed conditions at sea are numerically simulated.The resistance performance and structural deformation of the sea anchor under different drift velocities of the life raft are comprehensively analyzed.The influence of forebody wake and rigid-flexible body sea anchor conversion on the total resistance of the life raft body is corrected.The similarity of the resistance fitting equations for flexible body sea anchors with those in the literatures proves the reliability of the numerical simulations.The results show that sea anchor can lower the drift velocity of the life raft effectively,which enhances the possibility of being rescued.

关 键 词：海锚 救生筏 流固耦合 阻力性能 任意拉格朗日-欧拉(ALE)算法 

分 类 号：U663[交通运输工程—船舶及航道工程]