高速自锐侵彻战斗部引信动力学响应与磁场特征研究

Research on Fuze Dynamic Response and Magnetic Field Features for High Speed Self-Sharpening Penetration Warhead

摘要:

在当今军事技术的快速发展中，高速自锐侵彻战斗部在毁伤深埋高价值硬目标与多层建筑时，具有巨大的战略价值。本文通过建立动力学响应和磁场分析模型，深入研究自锐战斗部侵彻6m C40混凝土靶板和多层钢筋混凝土靶板时引信的力学与磁场响应特性，为提高侵彻自锐战斗部毁伤精度提供支撑。在引信动力学响应的研究中，战斗部侵彻混凝土靶板历程，侵蚀后的靶板呈现出漏斗形状，随着战斗部侵彻的深入，应力波的稀疏效应逐渐减弱，战斗部的速度线性衰减，并在最终进入稳定侵彻模式的过程中，速度下降约52%。由于应力波在战斗部内部的传递与叠加导致引信位置检测的过载信号较为震荡。在引信磁场分析的研究中，地磁倾角为90°、地磁偏角为0°（即地磁场垂直于靶板中心线）时，X、Y轴磁通密度幅值小、信号无规律、穿层特征不明显；Z轴磁通密度幅值大、信号规则、穿层特征明显。地磁场强度越大，钢筋半径越大，地磁倾角越大，侵彻靶板层信号特征越明显。而Z轴磁通密度不受地磁偏角影响。

Abstract:

n the rapid development of military technology today, high-speed self piercing warheads have enormous strategic value in destroying deep buried high-value hard targets and multi-layer buildings. This article establishes dynamic response and magnetic field analysis models to deeply study the mechanical and magnetic field response characteristics of the fuze when self piercing warheads penetrate 6mC40 concrete targets and multi-layer reinforced concrete targets, providing support for improving the damage accuracy of self piercing warheads. In the study of the dynamic response of fuses, during the process of the warhead penetrating a concrete target, the eroded target presents a funnel shape. As the warhead penetrates deeper, the sparse effect of stress waves gradually weakens, and the velocity of the warhead linearly decays. In the final process of entering a stable penetration mode, the velocity decreases by about 52%. Due to the transmission and superposition of stress waves within the warhead, the overload signal detected by the fuse position is more oscillating. In the study of fuse magnetic field analysis, when the geomagnetic inclination angle is 90 ° and the geomagnetic declination angle is 0 ° (i.e. the geomagnetic field is perpendicular to the centerline of the target plate), the amplitude of the X and Y axis magnetic flux density is small, the signal is irregular, and the interlayer characteristics are not obvious; The Z-axis magnetic flux density has a large amplitude, regular signal, and obvious interlayer characteristics. The stronger the geomagnetic field, the larger the radius of the steel bar, the greater the geomagnetic inclination angle, and the more obvious the signal characteristics of penetrating the target layer. The Z-axis magnetic flux density is not affected by the geomagnetic declination angle.