爆炸与冲击2025，Vol.45Issue(9)：1-15,15.DOI:10.11883/bzycj-2024-0232
航行体高速入水时多孔泡沫的缓冲降载特性
Study on load reduction characteristics of porous foam buffer for high-speed water entry vehicle
摘要
Abstract
Applicable buffer-head covers and various open-cell foam buffer configurations were designed to meet the buffering and load reduction challenges during high-speed water entry vehicles.In the arbitrary Lagrangian-Euler method,the grid can move as the material flows within the spatial grid.This unique feature allows the arbitrary Lagrangian-Euler method to harness the advantages of both the Lagrangian and Euler methods.It not only overcomes numerical calculation challenges stemming from element distortion but also facilitates accurate computation of large deformations and displacements in solids and fluids.This makes it particularly well-suited for addressing high-speed water buffer load reduction problems.Based on the arbitrary Lagrangian-Euler method and considering the large deformation of the buffer foam and the hood,a numerical calculation model for buffering and load reduction during high-speed water entry of navigational bodies was established.Through numerical simulations,an in-depth study was conducted on the load reduction performance of buffer foams with different open-cell patterns.The results indicate that open-cell buffer foam exhibits significant advantages in dispersing the impact force and absorbing impact energy during water entry of navigational bodies,offering better buffering effects.Simultaneously,the buffer head cover experiences local progressive fragmentation upon water entry.The deformation and rupture of the outer wall surface of the buffer head cover at the connector between the buffer shell and the navigational body are caused by the stress concentration distribution generated during water impact.When the open-cell foam contacts the water surface,the front part enters the collapse stage,absorbing a large amount of energy and undergoing plastic deformation,resulting in a reduction of pores.This stage is the primary energy absorption phase for the buffer foam.In comparison,closed-cell foam exhibits poorer load reduction performance.Therefore,the adoption of open-cell foam represents a superior solution for buffering and load reduction during high-speed water entry of navigational bodies.关键词
高速入水/缓冲降载/能量吸收/多孔泡沫Key words
high-speed water entry/buffer and load reduction/energy absorption/porous foam分类
数理科学引用本文复制引用
原凯,吴琪衡,孙铁志,杨娜娜..航行体高速入水时多孔泡沫的缓冲降载特性[J].爆炸与冲击,2025,45(9):1-15,15.基金项目
基础科研计划项目(JCKY2021203B003) （JCKY2021203B003）
