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目的 建立水下爆炸性冲击波实验模型并分析其应力分布特性。方法 根据爆炸性冲击波的理论应力分布特性 ,建立水下爆炸性冲击波实验模型。将培养的内皮细胞放入特制的无菌薄层塑料袋内模拟细胞致伤模型 ,用 80mg电雷管致伤后观察细胞损伤情况。结果 爆炸性冲击波在水中的衰减速度较空气中缓慢 ,水的深度对冲击波压力峰值有显著影响 ,对于同一爆源 ,水越深 ,压力值越小。不同层数的滤膜覆盖与压力感应呈线性衰减 ,8层滤膜覆盖致伤时可见内皮细胞有明显的皱缩脱落现象。结论 冲击波在不同介质中的传播速度与衰减幅度与介质的密度密切相关 ;水下冲击波的压力值不仅与爆源的距离有关 ,而且与水深有关。
Objective To establish an experimental model of underwater explosive shock wave and analyze its stress distribution characteristics. Methods Based on the theoretical stress distribution of explosive shock wave, an experimental model of underwater explosive shock wave was established. The cultured endothelial cells into a special sterile plastic bags simulated cell injury model, with 80mg electric detonator injury observed after cell injury. Results The explosive shock wave in water decay more slowly than the air. The depth of water has a significant impact on the peak pressure of shock wave. For the same explosive source, the deeper the water, the lower the pressure value. Different layers of filter coverage and pressure sensing showed a linear attenuation, 8 layers covered with membrane injury showed endothelial cells obvious shrinkage shedding phenomenon. Conclusion The propagation velocity and attenuation amplitude of shock wave in different media are closely related to the density of media. The pressure value of underwater shock wave is not only related to the distance of the explosion source but also to the depth of water.