Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Numerical analysis of the detonation characteristicsof cased charges under mass impact
| DOI: | 10.11809/bqzbgcxb2024.07.027 |
| Keywords: | impact detonation; cased charge; large projectile; critical detonation velocity;tilt angle |
| Abstract: | In order to explore the mechanism of the new anti missile protection structure, nonlinear dynamics software LS DYNA was used to establish a large typical projectile on the cylindrical shell charge structure of the impact detonation numerical analysis model. Tungsten alloy projectile of different masses, shapes and tilt angles under the low velocity impacting the shell B charge were calculated to obtain the critical impact velocity, the process of the detonation and the pressure change. The results show that: the larger the mass of the projectile, the wider the surface of the transmitted pressure wave formed inside the charge, and the longer the duration; In the 0.1~30 kg mass range, the projectile impact detonation of shelled charge performance is related to the initial kinetic energy. The critical kinetic energy of B charge with 20 mm, 40 mm and 60 mm end caps under impact initiation is about 250 kJ, 930 kJ and 1 600 kJ respectively; Projectile tilt impact charge detonation orientation with the change in tilt angle φ. As φ≤ 15° , the lowest critical impact velocity is by cylindrical projectile; As φ>15°, the lowest critical impact is by velocity spherical projectile. |
| Published: | 2024-07-26 |