深海环境下带球封头钛合金耐压壳碰撞特性研究  

Collision characteristics of TC4 cylindrical pressure shell with semi-spherical heads in deep sea

作　　者：俞白兮 余越 司马灿[1,2] YU Bai-xi;YU Yue;SIMA Can(China Ship Scientific Research Center,Wuxi 214082,China;TaiHu Laboratory of Deep Sea Technology and Science,Wuxi 214082,China)

机构地区：[1]中国船舶科学研究中心,江苏无锡214082 [2]深海技术科学太湖实验室,江苏无锡214082

出　　处：《船舶力学》2022年第7期1019-1028,共10页Journal of Ship Mechanics

摘　　要：深海装备在大潜深环境航行时存在碰撞的可能。本文基于Abaqus仿真软件模拟大深度、中低航速情况下带球封头钛合金环肋圆柱壳耐压结构与玄武岩的碰撞过程,考察结构的撞击变形、应力响应,从失稳破坏和强度破坏的角度分析耐压壳的撞击安全性。结果表明,球封头碰撞残余应力对耐压壳极限承载能力有提升作用,评估封头撞击对失稳模式和承载能力的影响时只需考虑塑性变形;考察钛合金耐压壳球封头碰撞的破坏模式时应优先考虑结构的强度破坏。There exist some possibilities of collision for a submersible cruising in the deep sea. In this paper the numerical simulation of the impact process between a TC4 cylindrical pressure hull with semi-spherical heads and basalt was carried out by using Abaqus, in which both medium and low speeds were considered in the condition of deep sea. The impact safety of the pressure hull, which was dependent on structural instability destruction and strength failure, was analyzed with observation of structural deformation and stress response.The results of practical engineering interest suggest that the ultimate loading capacity of the pressure hull could be enhanced by the residual stress resulting from the impact, so that only the plastic impact deformation is required in evaluating the influence of impact on structure’s instability pattern and in evaluating ultimate loading capacity. The damage mode necessitates prior consideration of strength failure that substantially affects the impact characteristics between TC4 cylindrical pressure hull with semi-spherical heads and basalt.

关 键 词：深海潜器 深海碰撞 数值仿真 碰撞特性 

分 类 号：U674.941[交通运输工程—船舶及航道工程]