超高速撞击蜂窝夹芯板的弹丸形状效应数值模拟研究  

Numerical Simulation of Projectile Shape Effect on Honeycomb Sandwich Panels Impacted at Ultra-high Velocity

作　　者：李鑫冰 赵翼飞 吴彼 LI Xinbing;ZHAO Yifei;WU Bi(School of Mechanical and Power Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China)

机构地区：[1]沈阳化工大学机械与动力工程学院,沈阳110142

出　　处：《装备环境工程》2024年第7期112-123,共12页Equipment Environmental Engineering

摘　　要：目的通过数值模拟研究不同形状弹丸在超高速垂直撞击下对蜂窝夹芯板的能量传递和损伤机制。方法采用固定FEM-SPH耦合方法,并将数值模拟结果与NASA的试验数据进行对比验证。经验证的模型被用于比较圆锥形、立方体和球形弹丸对蜂窝夹芯板能量吸收效率及损伤分布的影响。结果随着撞击速度的增加,前后面板的损伤面积以及蜂窝核心层的能量吸收和损伤面积均有所增加。D/H值的增加会降低前后面板的能量吸收效率,而提高蜂窝核心层的吸收效率。撞击位置的变化直接影响弹丸碎片在蜂窝核心内的分布,从而改变碎片云的膨胀区域和后面板的损伤形态。结论弹丸形状、撞击位置和速度等因素对蜂窝夹芯板损伤特征、能量吸收效率和损伤分布具有显著影响。The work aims to conduct numerical simulation to study the energy transfer and damage mechanism of honey-comb sandwich panels under the impact of hypervelocity vertical incidence of projectiles with different shapes.The fixed FEM-SPH coupling method was used.The numerical simulation model was verified by comparing with the NASA experimental results.The verified model was used to further study and compare the effects of conical,cubic and spherical projectiles on the energy absorption efficiency and damage distribution of honeycomb sandwich panels.The damage area of the front and rear panels increased with the increase of the impact velocity,and the energy absorption and damage area of the honeycomb core layer also increased with the increase of the impact velocity.The increase of the aspect ratio D/H led to the decrease of the en-ergy absorption efficiency of the front panel and the rear panel,while the absorption efficiency of the honeycomb core layer in-creased.The change of the impact position directly affected the mass distribution of the projectile fragments in the honeycomb core,the expansion area of the debris cloud and the damage morphology of the rear panel.The results show that factors such as projectile shape,impact location and velocity have significant effects on the damage characteristics,energy absorption efficiency and damage distribution of honeycomb sandwich panels.

关 键 词：AUTODYN 蜂窝夹芯板 FEM-SPH耦合 超高速撞击 弹丸形状效应 数值模拟 

分 类 号：O385[理学—流体力学]