光滑粒子流体动力学是一种纯 Lagrangian 的无网格数值计算方法，可以很好地处理动态载荷下材料大变形问题。采用SPH方法对射流成形和拉伸进行初步研究，给出求解爆炸和射流成形的力学模型和离散格式，针对一定锥角药型罩射流成形进行数值研究。结果表明，对爆炸、射流成形等瞬态动力学问题，SPH方法是行之有效的，但在计算过程中也存在数值断裂和应力不稳定等问题。
Smoothed particle hydrodynamics,as a total Lagrangian meshfree numerical simulation method,can solve large deformation problems under dynamic loading. Mechanics model and discrete formula were presented. Numerical simulation of shaped charge jet forming process with a certain cone angle was studied. The study shows that SPH is a valid method to simulate transient dynamics problems,such as exploding,shaped charge jet,and so on,but some numerical flaws,like numerical fracture and tensile instability,will coexist.
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