Interaction of Shock Waves in Ground Burst
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摘要: 为了研究多点同步地面爆炸冲击波的相互作用,通过改变装药质量组合和布局,利用空中爆炸测量系统对2点和3点地面同步爆炸进行了试验研究,并利用冲击波与刚性壁面碰撞理论计算了2个冲击波相互作用的冲击波压力和冲量。结果表明:多个装药同步爆炸时,冲击波超压和冲量都显著增加,大大提高了装药爆炸威力。装药总质量相同时,炸药的组合数量越多,冲击波超压和冲量越高,不同布局的装药,冲击波超压和冲量的增加量也不同。冲击波与刚壁的碰撞模型可以用来近似计算2个同等强度冲击波的相互作用。Abstract: The interaction of shock waves in ground burst was studied by experiment with various experiment layouts.Parameters of shock waves of two or three charges exploding simultaneously were measured using air explosion test system.The results show that the shockwave overpressure and impulse are enhanced greatly, blasting power increased.The change of shockwave parameters was significant for various experiment layouts, where the amount and orientation of explosive source increasingly effected the magnitude of shockwave parameters.Shock waves collision with rigid wall can be used to approximately calculate the interaction of two equal-intensity shock wave.
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Key words:
- explosion mechanics /
- ground burst /
- cylindrical charge /
- shock wave interaction
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表 1 试验工况
Table 1. Experimental condition
Condition Remarks 600 g One charge 2×300 g(90°) Two 300 g charges cross at right angles 2×300 g(180°) Two 300 g charges at an angle of 180° 3×200 g(90°) Three 200 g charges cross at right angles 3×200 g(120°) Three 200 g charges at an angle of 120° 表 2 8#铜雷管的瞬发度
Table 2. 8# detonator instantaneous
No. Instantaneous/(μs) Absolute deviation/(μs) 1 57 -0.5 2 58 0.5 3 57 -0.5 表 3 地面冲击波超压和冲量
Table 3. Shock wave overpressure and impulse on ground surface
Condition Overpressure/(MPa) Gain/(%) Impulse/(Pa·s) Gain/(%) 600 g 0.25 0 77.7 0 2×300 g (90°) 0.37 48 112.2 44.4 2×300 g (180°) 0.33 32 141.6 82.2 3×200 g (90°) 0.45 80 176.7 127.4 3×200 g (120°) 0.57 128 190.9 145.7 表 4 试验值和计算值的对比
Table 4. Experimental data comparison with calculation values
Condition Overpressure/(MPa) Relative error
/(%)Impulse/(Pa·s) Relative error
/(%)Exp. Cal. Exp. Cal. 2×300 g (90°) 0.37 0.32 7.25 112.2 90.5 10.70 2×300 g (180°) 0.33 0.38 -7.04 141.6 155.4 4.65 -
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