泡沫材料能够有效地吸收冲击能量且防震效果好，因此被广泛应用于舰船防护领域。本文基于Ls-dyna中的ALE方法，从结构变形和结构各组成部分吸能角度，探究背水夹芯板与背空夹芯板（PVC H100泡沫夹芯板）在近场水下爆炸载荷作用的挠度响应及吸能特性的差异，为船用PVC夹芯结构的应用及舰船的防护结构设计提供参考。结果表明芯层材料可压缩性强，具有良好的吸能特性，金属前面板变形及吸能要大于后面板；相对于背水夹芯板，由于声阻抗不同，背空板减少了透射能量，本身吸能增加，前后金属面板变形均匀化。
Foam material can effectively absorb impact energy and has a good shock-proof effect, so it is widely used in the field of ship protection. Based on the ALE method in Ls-dyna, this paper explores the effect of the water-backed sandwich panel and the hollow-backed sandwich panel (PVC H100 foam sandwich panel) in the near-field underwater explosion load from the perspective of structural deformation and energy absorption of each component of the structure. The difference in deflection response and energy-absorbing characteristics of the ship provides a reference for the application of marine PVC sandwich structures and the design of the protective structure of ships. The results show that the core material is highly compressible and has good energy absorption characteristics. The deformation and energy absorption of the metal front panel are greater than that of the rear panel; compared to the water-back sandwich panel, the backside empty sandwich reduces the transmitted energy due to the difference in acoustic impedance. The energy absorption is increased, and the deformation of the front and rear metal panels is evened.
2022,44(22): 7-12 收稿日期：2021-04-15
DOI：10.3404/j.issn.1672-7649.2022.22.002
分类号：U668.5;O38
作者简介：王嘉捷(1997-),男,硕士研究生,研究方向为水下爆炸和结构跨介质入水
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