基于Ls-dyna的ALE算法，对排水量为5890t的船体梁在315 kg TNT水下近距爆炸下的鞭状运动进行数值模拟，分析船体梁鞭状运动过程和药深对船体梁鞭状运动的影响，探究了船体梁鞭状运动与水下爆炸气泡脉动过程在时间上的同步性。研究表明：船体梁的第一次中拱、中垂运动与炸药的第一次膨胀、收缩过程在时间上基本同步，而船体梁的后续中拱、中垂运动与炸药的后续膨胀、收缩过程在时间上稍有延迟；随着药深增大，船体梁的第二次中拱、中垂运动逐渐增大，并在时间上逐渐延迟。
Whipping motions of a5890t hull girder subjected to near-field underwater explosion of 315 kg TNT was numerically researched by using ALE method of Ls-dyna soft. Process of whipping motions of the hull girder and effect of charge sink depth change on whipping motions of the hull girder was analyzed. Results shows that, first hogging and sagging motions of the hull girder happen approximately in the meantime with first expansion and constriction of the charge, but following hogging and sagging motions of the hull girder are little late the following expansion and constriction of the charge. With charge sink depth adding, second hogging and sagging motions of the hull girder are increasing and happen lately.
2023,45(2): 8-12 收稿日期：2022-01-13
DOI：10.3404/j.issn.1672-7649.2023.02.002
分类号：O383；U661.7
基金项目：国家自然科学基金资助项目（51679244）
作者简介：吴林杰(1987-),男,博士,讲师,研究方向为舰船抗爆抗冲击
