含预制孔容器内爆问题的FEM-SPH耦合算法模拟

考虑带预制孔容器内空气的影响,采用三维FEM-SPH自适应耦合算法程序对含预制孔容器在内爆载荷作用下的动态响应过程进行了模拟,与实验所得到的破坏特征参量吻合。同时也用LS-DYNA软件中ALE算法得到的计算结果与FEM-SPH自适应耦合算法得到的结果进行比较,进一步分析了FEM-SPH自适应耦合算法的有效性。FEM-SPH自适应耦合算法能够稳定再现内爆载荷作用下含预制孔容器的爆炸鼓包过程、预制孔毁伤破坏过程以及容器内空气运动过程,可以为容器内爆问题的数值模拟研究提供有效途径。

Simulation for dynamic response of a vessel with a preformed hole under internal explosion using FEM-SPH coupled algorithm

Dynamic response of a vessel with a preformed hole under inner explosion was simulated using the 3D adaptive FEM-SPH coupled algorithm considering the effect of air inside the container. Failure characteristic parameters obtained with simulation agreed well with those gained in tests. Moreover, the results obtained using the ALE algorithm in LS-DYNA software were compared with those using the adaptive FEM-SPH coupled algorithm. It was shown that the adaptive FEM-SPH coupled algorithm can effectively reproduce the process of vessel’s inner explosion bulges, the process of preformed hole failure and air movement in vessel under internal explosion load; it provides an effective study way for the numerical simulation of internal explosion problems of vessels.