Modern field fortification systems are very large and cause a logistical burden during setup, thus setting the requirement for their modification. A simulation study was conducted to study the correlation between the compaction of sand and the energy absorbed by it when impacted by a solid steel projectile at 850 m/s. Furthermore, the sandbag was modified by the addition of plates in the system to observe the change in projectile penetration and the energy absorption behaviour of the sand. The factors considered for this study were the plate thickness (15 mm, 25 mm), plate material (aluminium, concrete, plexiglass, polycarbonate, steel) and plate location (226 mm, 236 mm, 256 mm from the point of impact). It was observed that a layer of compressed sand is formed around the projectile, aiding the energy absorption and dissipation process during impact. Upon addition of the plate, it was observed that the modified system (plate and sand) absorbed maximum energy when the plate is placed closest to the point of maximum penetration without the plate. It was also noted that the addition of the plate enhanced energy absorption characteristics of the system compared to conventional sandbags because of increased compaction of sand. From the study, it was observed that the plexiglass and polycarbonate plates had the maximum energy absorption and maximum deformation. The steel plate had the least energy absorption and minimal deformation. Concrete and Aluminium had comparable areal density, energy absorption and lowest deformation, making them the preferred choice of plate material for a modified sandbag. The numerical studies were verified using a gas gun and a modified sandbag with Aluminium plates to show that the addition of a plate improves compaction behaviour of sand.

现代野战防御系统非常庞大，在设置过程中会造成后勤负担，因此需要对其进行修改。进行了一项模拟研究，以研究当以 850 m/s 的速度受到实心钢弹丸撞击时，沙子的压实与其吸收的能量之间的相关性。此外，通过在系统中添加板对沙袋进行了修改，以观察弹丸穿透力的变化和沙子的能量吸收行为。本研究考虑的因素是板厚（15 毫米、25 毫米）、板材料（铝、混凝土、有机玻璃、聚碳酸酯、钢）和板位置（距撞击点 226 毫米、236 毫米、256 毫米）。观察到在弹丸周围形成一层压缩沙子，帮助冲击过程中的能量吸收和消散过程。添加板后，观察到当板放置在最靠近最大穿透点而没有板时，改进的系统（板和沙子）吸收了最大能量。还注意到，由于增加了沙子的压实度，与传统沙袋相比，板的添加增强了系统的能量吸收特性。从研究中可以看出，有机玻璃和聚碳酸酯板具有最大的能量吸收和最大的变形。钢板具有最少的能量吸收和最小的变形。混凝土和铝具有相当的面密度、能量吸收和最低变形，使它们成为改良沙袋的首选板材。