为分析周边固支效应靶的变形稳健性,结合薄板冲击响应模型,建立薄板变形稳健性的表征方法和极限状态函数,提出了一种基于Monte-Carlo法的薄板变形稳健性分析方法,并探讨抽样次数、载荷参量、几何参量和材料参量对变形稳健性及灵敏度的影响.结果表明:当抽样次数大于30万次时,薄板变形稳健性结果趋于稳定,说明其非线性较强;薄板变形稳健性随半径厚度比、厚度的增大而降低;薄板半径标准差的灵敏度最大,是薄板变形稳健性的主控参量.研究结果为周边固支效应靶的设计与压力测量应用提供了参考.

为明确弹体平动和转动速度对破片场初速分布作用,基于矢量叠加法和SPH数值计算研究了平动与转动速度单独作用下的破片场初速分布变化,开展了平转动作用的耦合影响研究.研究表明:单独作用时,相比转速,平动速度作用效果更强,作用能力对破片静爆飞散方向更敏感;平转动速度作用相互影响,对于静爆飞散方向不同的破片,平动速度对其加速能力存在差异,转速增加使差异降低;平动速度增加会使差异提升.平动速度增加导致破片弹道交叉,施加转速可以缓解该现象.

为了研究壕沟地形对爆炸冲击波传播规律的影响,基于Autodyn-3D仿真软件,建立了不同宽度和深度壕沟地形及平整地面的触地爆炸数值模型,并通过求解获取了不同地形工况下的冲击波超压及冲量数据.结果显示,随着壕沟宽度的增加,壕沟底部测点3位置的首峰压力逐渐降低,当宽度大于0.7 m后,峰值压力保持不变,但冲量值仍降低;随着壕沟深度的增加,壕沟底部测点3位置的首峰压力也逐渐降低,但冲量值反而增加,当深度大于0.6 m时,峰值压力降低的趋势已不明显.相关结论可为炸药装药在壕沟地形爆炸的威力输出和安全防护提供指导.

Linear explosively formed penetrator (LEFP) warhead becomes a spot in research.In order to estimate initial velocity of large length to diameter ratio LEFP, numerical simulation was used to simulate its forming result and initial velocity.Through simulating the initial velocity distribution of LEFP, Gurney formula was corrected to be applicable to estimate initial velocity of LEFP.Based on the corrected Gurney formula, an effective charge model relating to the curve warhead is advanced.The results of the experiment, numerical simulation and formula computing of initial velocity of LEFP were compared to validate the corrected Gurney formula.And, the damage ability of LEFP was tested by experiment.

针对云爆战斗部二次起爆引信静爆试验过程中起爆时间偏差较大的问题,采取提高电路稳压可靠性、增加电缆传输线切断功能及优化电路板布线设计等抗干扰方法,提高了二次起爆引信抗干扰能力,并通过引信系统时序试验、静爆试验验证,结果表明:能够抑制一次起爆所产生的冲击、燃料及爆轰产物叠加产生的复杂场的干扰,解决了时间偏差较大的问题,延时引信时间准确,抗干扰方法有效,提高了起爆引信的作用可靠性.

The characteristics of detonation wave in dual explosive under asymmetrical initiation was studied.The shape of the detonation front,the t vs.d coordinate and the shape distribution of the detonation wave was gained by the slit scan technique of rotating mirror camera. The velocity distribution,the formed reason of the concave detonation front and the spread rule of the detonation convergence wave were analyzed.The detonation front is convergent shape of bow wave and it can accelerate the detonation velocity of the inner explosive.