基于虚拟原点概念的连续射流侵彻计算

The Calculation of Penetration of a Continuous Shaped Charge Jet Based on The Virtual Origin Concept

对于沿射流长度方向具有线性分布速度的连续射流,经典的基于虚拟原点理论的射流侵彻关系式能很好的描述其侵彻行为。但对于非线性速度分布的连续射流,存在的虚拟原点不是唯一的。本文从对非线速度分布的射流的有限段线性近似和射流的应变率两个方面出发,讨论了虚拟原点概念在具有非线性速度分布的连续射流对目标侵彻深度计算中的推广问题。

The classical penetration equation based on the virtual origin theory can well describe the penetration behaviour of the continuous jet with linear velocity distribution. But for the continuous jet which velocity gradient is not linear, it has not only one virtual origin. From two aspects which are finite segments linear approximation for the nolinear velocity distribution and jet's strain rate, the issue that whether the virtual origin concepts can extend to the penetration calculation of the continuous jet with a nolinear velocity gradient.