基于ALE的充气式海上围栏系统气囊单元优化设计  

Optimization design of airbag unit forinflated offshore fender system based on ALE

作　　者：卢正起 李楷[1] 常松亮 苑志江[2] 蒋晓刚[2] LU Zhengqi;LI Kai;CHANG Songliang;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》2023年第3期282-290,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：针对充气式海上围栏系统的气囊单元选型,在单层单气室气囊的基础上提出单层多气室气囊、双层多气室气囊两种改进型,建立静水海域中小艇以10、20、30 m/s的初速度垂直撞击气囊中部3种典型拦截场景.基于任意拉格朗日-欧拉(ALE)算法,应用有限元软件LS-DYNA进行数值模拟,通过小艇的最大碰撞力、最大反向加速度、单元失效比等数据,分析单层单气室气囊、单层多气室气囊、双层多气室气囊3种气囊单元对来袭小艇的拦截效果,发现双层多气室气囊的拦截能力最强.借助正交试验进一步优化双层多气室气囊的设计参数.通过优化后的结果发现,优化后的双层多气室气囊的最大碰撞力相比原设计方案提高了9%,显著提高了气囊的拦截能力.Aiming at type selection of airbag unit for inflated offshore fender system, two improved types of single-layer multi-chamber airbag and double-layer multi-chamber airbag are proposed on the basis of single-layer single-chamber airbag, and three typical interception scenarios of small boat with initial speeds of 10, 20 and 30 m/s vertically impacting the middle of the airbag are built. Based on arbitrary Lagrange-Euler (ALE) algorithm, numerical simulation is conducted by using FE software LS-DYNA to compare interception effects of three types of airbag units, which are single-layer single-chamber airbag, single-layer multi-chamber airbag and double-layer multi-chamber airbag, via the data including the maximum impact force, the maximum deceleration and element failure ratio of the boat. Double-layer multi-chamber airbag turns out to be with the strongest interception ability. The design parameters of the double-layer multi-chamber airbag are further optimized by means of orthogonal test. The results of the optimization reveal that the maximum impact force of the optimized double-layer multi-chamber airbag is increased by 9% compared to the original design, so the interception capacity of the airbag is significantly improved.

关 键 词：充气式海上围栏系统 气囊优化 ALE算法 正交试验 

分 类 号：U662.2[交通运输工程—船舶及航道工程]