充气式海上围栏系统中气囊单元对冲击小艇拦截仿真分析  

Simulation analysis of boat intercepting of airbag unit in inflated offshore fender system

作　　者：鲍嘉伟 李楷[1] 卢正起 苑志江[2] 蒋晓刚[2] BAO Jiawei;LI Kai;LU Zhengqi;YUAN Zhijiang;JIANG Xiaogang(School of Naval Architecture and Ocean Engineering,Dalian University of Technology,Dalian 116024,China;Department of Navigation,Dalian Naval Academy,Dalian 116018,China)

机构地区：[1]大连理工大学船舶工程学院,辽宁大连116024 [2]海军大连舰艇学院航海系,辽宁大连116018

出　　处：《大连理工大学学报》2022年第6期609-617,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：充气式海上围栏系统是一种易于部署和安装的低成本港口安全防护系统.为了分析充气式海上围栏系统对冲击小艇的拦截效果,促进高效率设计,建立了充气式海上围栏系统中气囊单元和小艇的有限元模型,并基于任意拉格朗日-欧拉(ALE)算法对小艇撞击充气式海上围栏系统过程进行数值模拟.设置小艇以10、20、30m/s的初速度垂直撞击气囊中部这3种典型拦截场景,通过数值模拟,从碰撞前后的小艇速度、加速度、单元失效比、能量转化等碰撞特性分析充气式海上围栏系统对小艇的拦截效果.仿真结果表明,在3种场景下充气式海上围栏系统都具有良好的拦截效果,小艇前进方向速度分别降至2.02、4.20、4.45m/s,小艇最大加速度分别达到70.56、121.43、189.29m/s^(2),小艇单元失效比分别为0%、12.1%、20.6%.所提方法可为港口安全防护系统的设计提供一定参考.Inflated offshore fender system(IOFS) is a type of port security barrier system, which is easy to deploy and cost-effective. In order to analyze the boat intercepting effect of IOFS and facilitate the efficient design, the finite element models of airbag unit in IOFS and boat are established, and the process of boat intercepting of IOFS is simulated based on arbitrary Lagrange Euler(ALE) algorithm. Through numerical simulations of 3 typical interception scenarios of boat with initial speeds of 10, 20 and 30 m/s vertically impacting the middle of the airbag, the boat intercepting effect of IOFS is analyzed based on the investigation of the data including velocity, acceleration, element failure ratio and energy transformation of boat before and after the collision. The results show that IOFS has a good interception effect in all 3 scenarios. The forward speed of the boat is reduced to 2.02, 4.20 and 4.45 m/s respectively, the maximum acceleration of the boat is 70.56, 121.43 and 189.29 m/s~2 respectively, and the element failure ratio of the boat is 0%, 12.1% and 20.6% respectively. The proposed method can provide some reference for port security barrier system design.

关 键 词：充气式海上围栏系统 气囊 港口安全防护系统 ALE 

分 类 号：U662.2[交通运输工程—船舶及航道工程]