聚能射流侵彻钢靶的SPH-FEM数值模拟  

Numerical simulation of shaped charge jet perforating steel target by SPH-FEM coupling method

作　　者：李磊[1] 马宏昊[1] 沈兆武[1] 夏红兵[2] 

机构地区：[1]中国科学技术大学工程科学学院 [2]安徽理工大学土木学院

出　　处：《南京理工大学学报》2013年第2期226-232,共7页Journal of Nanjing University of Science and Technology

基　　金：国家自然科学基金重点项目(51134012);国家自然科学基金面上项目(51174183)

摘　　要：为了探讨光滑粒子-有限元耦合方法(SPH-FEM)在多介质、大变形问题三维数值模拟中的优越性和有效性,以聚能射流侵彻45#钢靶为例进行三维建模,采用LS-DYNA动力学有限元软件进行仿真。通过与流固耦合方法(ALE)仿真结果相比较分析其优越性,通过与理论计算和实验结果相比较分析其有效性。研究表明:SPH-FEM方法计算的变形图像比ALE方法更清晰,计算结果更精确,计算过程更稳定,且计算效率提高1倍;SPH-FEM方法计算的钢靶穿深、孔径的误差均小于5%。该耦合算法对于模拟多介质、大变形问题比ALE方法有效和优越。In order to analyze the validity and the superiority of the smoothed particle hydrodynamics-finite element coupling method(SPH-FEM)applied to multi-material and large deformation problems,an example of shaped charge jet penetrated into target is simulated by the dynamics finite element software LS-DYNA.The superiority and validity of SPH-FEM are certified by comparing the results with the arbitrary Lagrangian-Eulerian method(ALE)results,theoretical and experimental results respectively.Compcred with ALE,SPH-FEM has clearer images,more accurate results,and more stable calculation process.The computational efficiency is improved by about 100%,and the error of the penetration depth and the hole size is less than 5%.Therefore,the coupling method is superior for simulating multi-material and large deformation problems.

关 键 词：光滑粒子-有限元耦合方法 聚能射流 侵彻 钢靶 数值模拟 

分 类 号：O358[理学—流体力学]