三种算法在侵彻模拟中的对比研究

Study on Comparison of Three Algorithms in Penetration Simulation

文中利用LS-DYNA软件,分别采用有限元算法(FEM)、光滑粒子流体动力学法(SPH)及耦合算法(FEM-SPH)对弹体侵彻装甲钢板问题进行了数值仿真,对各种算法的优缺点进行了讨论及对比。结果表明,与FEM相比、SPH和FEM-SPH耦合法可以获得更好结果和更加形象的变形图像,计算大变形冲击动力学问题,同时耦合法还集中了FEM和SPH的优点,可以提高计算效率,节省计算时间。结果表明FEM-SPH耦合法是一种更有发展潜力的模拟方法。

The finite element method（FEM）, smoothed particle hydrodynamics（SPH） and coupling method（FEM-SPH） were adopted for numerical simulation of armored steel plate penetration by projectiles using LS-DYNA3D, and advantages and disadvantages of the three algorithms were compared and analyzed. It is demonstrated that compared with FEM, the SPH and the coupling method （FEM-SPH） are more efficient in simulation of large deformation problems of impact dynamics. By gathering the advantages of FEM and SPH, the coupling method （FEM-SPH） can greatly increase computation efficiency and save time. It is concluded that the coupling method （FEM-SPH） is a new potential numerical method.