爆炸复合边界效应SPH方法的数值模拟（英文）

发布时间：2018-11-11 20:44

【摘要】：利用LS-DYNA软件采用无网格的光滑粒子流体动力学(SPH)方法对爆炸复合的边界效应进行了二维数值模拟研究。结果表明,金属射流现象和边界效应与爆炸复合生产实践一致。爆炸复合边界效应产生原因并非是由于边界的冲击能量过剩而造成基复板碰撞时边界处的打伤打裂,在基复板碰撞之前,断裂已经产生,认为爆炸复合边界效应的产生是由于稀疏波对边界处爆轰产物的影响,导致复板边界处与内部存在速度差,从而使复板边界处的碰撞角变大,在爆轰产物压力的作用下发生断裂。此外,采用蜂窝结构炸药及双面爆炸复合方法可以使得边界效应得到有效控制。
[Abstract]:A two-dimensional numerical simulation of the boundary effect of explosive composite was carried out by using LS-DYNA software using a smooth particle hydrodynamic (SPH) method without meshes. The results show that the metal jet phenomenon and boundary effect are consistent with the practice of explosive compound production. The explosive composite boundary effect is not caused by the excess energy of the impact of the boundary, which results in the injury and crack at the boundary during the collision of the base composite plate, and the fracture has already occurred before the collision of the composite plate. It is considered that the effect of explosive composite boundary is due to the effect of sparse wave on the detonation product at the boundary, which leads to the velocity difference between the boundary and the interior of the composite plate, thus increasing the collision angle at the boundary of the composite plate. Fracture occurs under the pressure of the detonation product. In addition, the boundary effect can be effectively controlled by using the composite method of honeycomb explosive and double-sided explosion.
【作者单位】：安徽理工大学力学与光电物理学院;安徽理工大学化学工程学院;中国科学技术大学近代力学系;
【基金】：Natural Science Foundation of China(11502001,11602001) the Foundation for Ph D in Anhui University of Science and Technology(11146) the Key project of Natural Science Foundation of Anhui Province(KJ2017A089) Anhui Science&Technology Department(1608085QA15;1708085QA17;1708085QE123)
【分类号】：TG456.6

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