火炸药学报

为了获得杀爆战斗部对目标作用时破片和冲击波两种毁伤元耦合作用机理,分析了作用时序对耦合作用的影响,并通过量纲分析给出了以有孔平板相对于无孔平板在爆炸冲击波载荷下的中心点挠度增益表征的耦合作用系数。利用AUTODYN软件对爆炸冲击波作用下预制孔及无孔平板的塑性变形进行了数值模拟并进行了试验验证,以模拟结果为数据支撑构建了耦合作用模型,提出了杀爆战斗部对典型目标的耦合毁伤计算公式。应用建立的公式针对某杀爆战斗部对典型目标的毁伤进行了评估。结果表明,当穿孔密度较低时,平板中心点挠度变化并不明显,随着破片穿孔密度的增加和直径的增大,平板中心点挠度增益与孔密度和直径呈正相关的变化规律。采用联合毁伤模型较独立毁伤模型杀伤半径提高,提高幅度最大可达9.5%。

In order to comprehend the coupling mechanism of fragments and shock wave when the blast-fragmentation warhead acts on the target, the influence of action time sequence on coupling was analyzed, and the coupling coefficients of the deflection gain of the plate central point with holes relative to the plate without holes under the blast loading were given through dimensional analysis. The plastic deformation of flat plate with prefabricated hole and without hole under the action of blast wave was simulated by AUTODYN software, and was verified by experiments. Based on the results of numerical simulation, a coupling action model was constructed, and the coupling damage calculation formula of the warhead to typical targets was also proposed. The established formula was used to evaluate the damage of the typical target in a blast warhead. The results show that the deflection of the central point of the plate changes unobviously in the premise of low perforation density. However, with the increase of the perforation density and diameter of the fragments, the deflection gain of the central point of the plate also increases, and the deflection gain of the plate central point is positively correlated with the hole density and diameter. The killing radius of the combined damage model is higher than that of the independent damage model, and the maximum increase can reach 9.5%.

引言
1 模型及量纲分析
2 数值模拟及试验验证
3 破片冲击波耦合作用模型
4 应用算例
5 结论

图1 物理模型示意图<br/>Fig.1 Diagram of the physical model

图1 物理模型示意图
Fig.1 Diagram of the physical model

图2 数值计算模型
Fig.2 Simulation model

图3 典型时刻靶板应力状态<br/>Fig.3 Stress state of the target plate at typical time

图3 典型时刻靶板应力状态
Fig.3 Stress state of the target plate at typical time

图4 典型工况Q235靶板中心点挠度模拟曲线<br/>Fig.4 Deflection simulation curves of Q235 target center point under typical working condition

图4 典型工况Q235靶板中心点挠度模拟曲线
Fig.4 Deflection simulation curves of Q235 target center point under typical working condition

图5 试验现场布置[7]<br/>Fig.5 Layout of the test site

图5 试验现场布置[7]
Fig.5 Layout of the test site

图6 部分靶板试验结果<br/>Fig.6 Part of the plate experiment results

图6 部分靶板试验结果
Fig.6 Part of the plate experiment results

表1 2A12铝靶板中心点挠度的试验值与模拟值对比<br/>Table 1 Comparison of experimental and numerical deflection values of 2A12 aluminum target central point

表1 2A12铝靶板中心点挠度的试验值与模拟值对比
Table 1 Comparison of experimental and numerical deflection values of 2A12 aluminum target central point

表2 Q235钢靶板中心点挠度的试验值与数值模拟值对比<br/>Table 2 Comparison of experimental and numerical deflection values of Q235 steel target Central point

表2 Q235钢靶板中心点挠度的试验值与数值模拟值对比
Table 2 Comparison of experimental and numerical deflection values of Q235 steel target Central point

图7 Kf的三元函数拟合曲线<br/>Fig.7 Fitting curves of the ternary function of Kf

图7 Kf的三元函数拟合曲线
Fig.7 Fitting curves of the ternary function of Kf

图8 Q235钢板及2A12铝板的Kf二元函数拟合曲线<br/>Fig.8 Fitting curves of the binary function of Kf Q235 and Kf 2A12

图8 Q235钢板及2A12铝板的Kf二元函数拟合曲线
Fig.8 Fitting curves of the binary function of Kf Q235 and Kf 2A12

图9 不同工况下不同毁伤模型毁伤半径计算结果<br/>Fig.9 Calculation results of the damage radius under different damage models and different working conditions

图9 不同工况下不同毁伤模型毁伤半径计算结果
Fig.9 Calculation results of the damage radius under different damage models and different working conditions

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备注

引言

1 模型及量纲分析

2 数值模拟及试验验证

3 破片冲击波耦合作用模型

4 应用算例

5 结论

期刊信息

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