Based on the gridless SPH numerical technique of Ls-dyna hydrocode,the characteristics of debris clouds originating from impact of spherical projectile on the plate at different velocities were simulated.
给出由于碰撞速度不同,而引起的不同的碎片云图像,以及不同的靶板破碎孔的尺寸。
The variations of the diameter of holes,the debris clouds width,the cumulative percentage of fragments,the dimensionlcss momentum,the residual velocity and the velocity vectors of debris clouds are discussed.
采用光滑粒子流体动力学(SPH)方法对空间碎片超高速碰撞问题作了模拟分析,给出了靶孔直径和碎片云宽度随碰撞速度的变化、累积碎片分布、碎片云无量纲向前总动量随膨胀距离的变化、碎片云前端速度的变化规律以及碎片云速度矢量等。
The numerical simulation of the penetration and debris clouds is performed that columnar bar of high velocity impacts on thin steel plates with this method,and the problem is solved that how to found the SPH element model of the columnar bar,and the mechanism of forming process is analysed.
探讨了SPH算法的基本原理及该方法的优缺点;采用该算法对柱形杆高速冲击钢制薄靶板的击穿、粒子飞溅及碎片云的形成过程进行了数值模拟;解决了四棱柱形钢杆SPH粒子单元模型的建立问题,分析了作用过程的物理机理;表明SPH算法可以用于解决高速冲击动力学问题,模拟和预测材料在高速碰撞下的瞬态响应。
Characteristics of debris cloud produced by normal impact of spherical projectile on thin plate shield;
球形弹丸正撞击薄板防护屏碎片云特性研究
Laser shadowgraph for the visualization of hypervelocity impact debris cloud;
超高速碰撞碎片云的激光阴影照相技术
The rules of debris cloud produced by AL sphere normal impacting into AL thin target plate were analyzed and some relationships between penetration holes,radiation angle and,debris cloud characteristics and impact velocity,t/d were presented.
70)在3~6km/s的正向撞击速度下产生的碎片云规律。