由于软质夹层结构在防护结构中运用较为广泛，针对软质芯层在大变形情况下易出现负体积等问题，本文建立SPH-FEM耦合方法，并以泡沫铝软质芯层夹层结构为例，开展了试验和SPH-FEM耦合数值仿真分析，研究泡沫铝夹层结构在两种弹体作用下的抗侵彻性能。通过对比试验与数值仿真的弹道极限和结构变形，验证了本文提出的SPH-FEM耦合方法的可行性和准确性。然后基于SPH-FEM耦合方法，开展泡沫铝夹层板结构的抗侵彻性能影响因素分析，重点分析了面板和芯层厚度对弹道极限的影响。研究方法与结果可为舰船结构防护设计与安全提供参考。
Since soft sandwich structure is widely used in protective structures, aiming at the problem that soft core layer is prone to negative volume under large deformation, this paper established SPH-FEM coupling method, and took aluminum foam soft core layer sandwich structure as an example to carry out the test and SPH-FEM coupling numerical simulation analysis. The anti-penetration performance of the aluminum foam sandwich structure under the action of two kinds of projectiles is studied. The feasibility and accuracy of the SPH-FEM coupling method proposed in this paper are verified by comparing the ballistic limit and structural deformation of the test and numerical simulation. Then, based on the SPH-FEM coupling method, the influencing factors of the penetration resistance of the aluminum foam sandwich plate structure are analyzed, and the influence of the thickness of the panel and core layer on the ballistic limit is analyzed. The research methods and results can provide a reference for ship structure protection design and safety.
2023,45(21): 13-19 收稿日期：2022-9-26
DOI：10.3404/j.issn.1672-7649.2023.21.003
分类号：U661.7
基金项目：国家自然科学基金资助项目(52001145)
作者简介：杨文龙（1996-），男，硕士研究生，研究方向为高速冲击
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