带球封头的钛合金耐压结构深海碰撞动屈曲研究  

Deep sea collision dynamic buckling of titanium alloy pressure-resistant structure with ball head

作　　者：郭桐桐 赵延杰 刘平[3] 朱凌[4] 刘建湖[1,2] GUO Tongtong;ZHAO Yanjie;LIU Ping;ZHU Ling;LIU Jianhu;无(China Ship Scientific Research Center,Wuxi 214000,China;Tai Lake Lab of Deep-sea Technology Science,Wuxi 214000,China;College of Civil Engineering and Architecture,Jiangsu University of Science and Technology,Zhenjiang 212000,China;College of Ship,Oceanography and Energy Power,Wuhan University of Technology,Wuhan 430000,China)

机构地区：[1]中国船舶科学研究中心,江苏无锡214000 [2]深海技术科学太湖实验室,江苏无锡214000 [3]江苏科技大学土木工程与建筑学院,镇江212000 [4]武汉理工大学船舶海洋与能源动力学院,武汉430000

出　　处：《振动与冲击》2024年第17期246-253,共8页Journal of Vibration and Shock

摘　　要：钛合金深海装备在水下作业时可能会与海山、礁石等海底固定物发生碰撞,这种在高应力状态下发生的冲击碰撞可能会对钛合金结构稳定性造成很大的影响。目前,学术界对于这种在双重载荷环境下发生的结构稳定性问题并没有太多的研究,也没有可供参考的经验公式。在钛合金材料动态力学性能试验的基础上,结合理论分析和大量数值模拟,建立在碰撞力集中载荷和均布压力共同作用下钛合金球柱组合结构的动屈曲判断准则,所得结果可以为深海装备水下航行安全性提供重要参考。Titanium alloy deep-sea equipment may collide with seafloor fixed objects of seamounts and reefs during underwater operations,and such impact collisions under high stress conditions may have a significant impact on the stability of titanium alloy structures.At present,there is not much study on this problem of structural stability under dual load environments,and there are no empirical formulas available for reference.Here,on the basis of dynamic mechanical performance tests of titanium alloy materials,combining theoretical analysis and a large number of numerical simulations,a dynamic buckling judgment criterion for titanium alloy ball-column composite structures under combined action of collision force concentrated load and uniformly distributed pressure was established.It was shown that the obtained results can provide important references for underwater navigation safety of deep-sea equipment.

关 键 词：深海碰撞 耐压结构 TC4钛合金 动屈曲 判断准则 

分 类 号：O313.4[理学—一般力学与力学基础]