基于SPH方法的不同材质射流毁伤性能研究

为研究不同材质射流的毁伤性能，使用AUTODYN有限元软件，采用光滑粒子流体动力学（SPH）方法对Cu、PTFE、PTFE-Cu三种材料药型罩形成射流的成型及侵彻靶板过程进行了数值仿真，并通过实验进行验证.研究结果表明:Cu材料药型罩在爆轰波的作用下形成凝聚的射流，而PTFE和PTFE-Cu材料药型罩则形成飞散的粒子流；三种材料射流侵彻靶板过程中，Cu射流头部速度最低，侵彻深度最深，开孔最小；PTFE粒子流头部速度最高，侵彻深度最浅，开孔大小居中；PTFE-Cu射流的头部速度和侵彻深度都居中，而开孔最大；PTFE-Cu射流克服了PTFE射流侵彻性能不足的缺点，其开孔能力较之铜射流有所提高. 

Study on Damage Characteristics of Different Jets Based on SPH Method

In order to study the damage performance of different jets,the AUTODYN finite element software was used,and the smoothed particle hydrodynamics (SPH) method was adopted,to simulate the formation of jets and penetrating targets of different jets by copper,PTFE and PTFE-Cu materials,and experiments were carried out.The results show that the liner of Cu material form a condensed jet under the effect of detonation wave,while PTFE and PTFE-Cu liner form scattering particle jets.The processes of three kinds of jets penetrating the target plate show that the copper jet head has the lowest speed,deepest penetration depth,and the smallest openings;the head speed of PTFE jet is the highest,the penetration depth is the shallowest and the opening is intermediate.The head speed and penetration depth of the PTFE-Cu jet are intermediate and the openings are the largest.PTFE-Cu jet overcomes the shortcomings of penetration performance of PTFE jet,and its ability of opening is higher than that of the copper jet.