高压逃生艇吊放过程结构碰撞损伤研究  

Analysis on Collision Damage of Hyperbaric Lifeboat Structure during Launching Process

作　　者：吕文亚 杨启[1,2,3] 陈新权[1,2] 张鑫 LüWenya;YANG Qi;CHEN Xinquan;ZHANG Xin(State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;School of Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Jiao Tong University Underwater Engineering Institute Co.,Ltd.,Shanghai 200231,China;Marine Design and Research Institute of China,Shanghai 200011,China)

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200240 [2]上海交通大学船舶海洋与建筑工程学院,上海200240 [3]上海交通大学海洋水下工程科学研究院有限公司,上海200231 [4]中国船舶及海洋工程设计研究院,上海200011

出　　处：《中国造船》2024年第6期78-91,共14页Shipbuilding of China

摘　　要：以饱和潜水用高压逃生艇艇体结构为研究对象,使用显式分析数值法对其碰撞响应进行研究。基于内聚力模型建立了适用于描述分层损伤的渐进损伤模型,基于VUMAT程序开发了适用于正交编织铺层层内损伤的渐进损伤数值模型。建立了多层实体单元艇体外壳层合板结构有限元模型,利用整船有限元模型计算分析了艇体结构的碰撞损伤,并研究了高压氧舱系统质量对碰撞损伤的影响。计算结果表明,分层是艇体碰撞损伤的主要形式;随着碰撞初速度的增加,艇体结构分层面积、与母船之间的碰撞力、艇体碰撞减速时间都会增加,但损伤耗散能占系统总能量的比例会趋于稳定。随着艇内高压氧舱系统质量的增加,艇体结构分层面积和艇体碰撞力都会增加,但是损伤耗散能占系统总能量的比例不断下降。所建立的多层实体单元数值模型可以准确计算层间方向的应力、应变分量,相比传统壳单元和连续壳单元都更加准确。相比于局部结构模型,所使用的全船模型虽然增加了计算时间,但省去了对相邻结构进行数值近似的过程,可以更直观、更完整地展现结构整体响应特征。The structural performance of a hyperbaric lifeboat under low-velocity collision loads is studied based on explicit analysis method in this paper.A progressive damage model of bi-directional orthogonal woven fiber reinforced composite layers is developed based on subroutine VUMAT.Another progressive damage model describing delamination damage based on cohesive zone model is established as well.The finite element model of lifeboat laminated hull structure is modelled by multi-layer solid elements.Based on explicit analysis,the finite element model of whole lifeboat structure is used to investigate the collision damage of the lifeboat structure,and the influence of the weight of hyperbaric chamber system on structural performance and damage during collisions.The results show that delamination is the main form of damage during lifeboat collisions.As the initial collision velocity increases,the delamination area of the hull structure,the impact force and the deceleration time will increase.However,the proportion of the damage dissipated energy in the total energy will be stabilized gradually.As the mass of hyperbaric chamber system increases,the delamination area of the hull structure and the impact force will increase,while the proportion of the damage dissipated energy in the total energy will decrease.The multi-layer solid element numerical model employed in this paper can accurately calculate interlayer stress and strain components,offering greater precision and superiority compared to traditional shell elements and continuum shell elements.Unlike partial structure models,the finite element model of whole lifeboat structure used in this paper,although increasing computation time,eliminates the need for numerical approximation of adjacent structures,thereby providing a more intuitive and comprehensive representation of the overall structural response characteristics.

关 键 词：高压逃生艇 吊放 复合材料 碰撞 分层损伤 

分 类 号：U661.43[交通运输工程—船舶及航道工程]