Theoretical Analysis and Numerical Simulation for Projectile Penetrating into Water at High Speed
Theoretical Analysis and Numerical Simulation for Projectile Penetrating into Water at High Speed
复制标题
弹丸高速入水理论分析与数值模拟
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
M. Le
中科院分区：
文献类型：
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作者：
M. Le
水中高速弹丸的运动涉及复杂的流固耦合（FSI）和多相流的流体动力学问题。高速弹丸入水研究取得重要突破。通过理论分析,给出了高速弹丸侵彻水中的理论分析模型。采用ANSYS/LS-DYNA软件和多材料Arbifrary Lagrange Euler(ALE)模拟其高速侵彻过程。结果表明，该模型可解决流体入水变形引起的流固耦合（FSI）数值计算困难。其冲击速度越大，在水下速度减小得越快，变形也越大。衰减系数和阻力系数随着冲击速度的增大而增大。为其入水渗透的理论分析和数值模拟研究提供了有价值的参考。
The movement of high speed projectile in the water involves complex fluid-structure interaction( FSI) and fluid dynamics of multiphase flow problems. An important breakthrough is made in the study for high speed projectile penetrating into water. Through theoretical analysis,its theoretical analysis model of high speed projectile penetration into water is given out. The software ANSYS /LS-DYNA and mulfi-material Arbifrary Lagrange Euler( ALE) are used to simulate the process of its penetration at high speed. The results show that the model can be used to solve the difficulty in numerical calculation of fluid-structure interaction( FSI) caused by fluid deformation when it penetrates into water. The higher its impact velocity is,the faster the velocity reduces under the water,and the more its deformation is. The attenuation coefficient and drag coefficient increases with the increase of impact velocity. It can be provides the valuable reference for theoretical analysis and numerical simulation studies of its penetration into water.