基于正交数值试验的反应装甲干扰射流参数敏感性研究

Parametric sensitivity of explosive reactive armor disturbance jet based on orthogonal numerical tests

基于炸药冲击起爆的Lee-Tarver模型,利用AUTODYN有限差分程序对射流侵彻引爆"三明治"爆炸反应装甲,爆轰压力驱动飞板切割射流过程进行了三维数值模拟。针对反应装甲飞板厚度、夹层装药厚度及射流入射角厚度三个影响因素,确定了射流干扰效率的评估指标,采用正交统计试验方法,对射流干扰效率的评估指标进行了参数敏感性研究。结果表明,射流入射角度对射流评估指标横向动量、头部速度及穿透背板时间均具有显著性的影响,呈正比关系,是最主要的影响因素;飞板厚度对射流评估指标均有较大的影响,是第二主要影响因素;夹层装药厚度对射流头部速度影响无明显规律性,对射流穿透背板时间无显著影响。

Based on the shock initiation of explosive—Lee-Tarver ignition and growth model,a three-dimensional numerical model was developed using the finite difference code AUTODYN to simulate the processes of jet penetrating and detonating a 'sandwich'ERA( explosive reactive armor),and an explosive pressure driven flyer plate incising a jet.Aiming at three influence factors in-cluding flyer plate thickness,interlayer charge thickness and jet inclined angle,the evaluating indicators of jet disturbing efficiency were determined. By means of the orthogonal statistical test method,the parametric sensitivity of the evaluating indicators of jet disturbing efficiency was studied. Results demonstrated that jet inclined angle is the main influence factor,jet's lateral momentum,jet tip velocity and the time of jet penetrating back plate are significantly affected by jet inclined angle,the relationship between jet inclined angle and evaluating indicators is positively correlated; flyer plate thickness is the second main influence factors,it affects all evaluating indicators evidently; interlayer charge thickness' s influence on jet tip velocity has no obvious regularity,and has also few influence on the time of jet penetrating back plate.