椭圆形罩LSC侵彻钢锭试验与三维数值模拟

Test and Three-dimensional Numerical Simulation of Penetrating Steel Ingot by Linear Shaped Charge with Oval Cover

为了获得椭圆形罩线型聚能装药(LSC)射流侵彻钢锭的特点和规律,采用实际切割试验和三维数值模拟(ANSYS/LS-DYNA)相结合的方法对椭圆形罩线性聚能装药射流侵彻钢锭过程的特点和规律进行了研究。结果表明,切割深度随炸高的增加先增加后下降,在一定炸高范围内表现出对炸高的不敏感性,最佳炸高为60 mm;随着炸高的增加,侵彻钢锭横断面形状的底部宽度从55 mm增至75 mm,中间的侵彻深度从70 mm增至84 mm,两端的侵彻深度从40 mm增至70 mm,切口剖面形状更趋于平缓;数值模拟获得的侵彻结果与切割试验获得的结果基本一致。该三维数值计算模型可以用来模拟实际的切割器,获得的切割钢锭的特点和规律能够较好地反映实际切割过程。

To study the characteristics and laws of penetrating steel ingot of linear shaped charge（ LSC）with oval cover,three-di-mensional numerical model was established by ANSYS /LS-DYNA program. A numerical simulation study was performed,and the actual cutting test was implemented on the base of numerical simulation. By using the method of actual cutting experiment and three-dimensional numerical simulation,the characteristics and laws of penetrating steel ingot of LSC with oval cover were stud-yed. Results show that the cutting depth first increases and then decreases with the standoff increasing. The cutting depth showed insensitivity in a standoff range. The best standoff was 60 mm. The cutting cross shape of the steel ingot of different time was obtained under the different condition of standoff. With the standoff increasing,the cross-section bottom width of penetrating steel ingot was from 55 mm to 75 mm,and the medial depth was from 70 mm to 88 mm,and the both sides depth was from 40 mm to 70 mm. The penetration results of numerical simulation were consistent with the cutting test results. The characteristics and laws of penetrating steel ingot from the simulation model can from the simulation model reflect the actual cutting process.