Research on rotational dynamics and protective capabilities of variable density flat chambers

To investigate the application of variable density flat charge chambers in safety protection, a novel variable density flat charge was devised. Simulation results revealed that gradient charge density variations, specifically with a high-density charge proportion of 0.4 to 0.6 and a charge density difference of 0.4 g/cm 3 to 0.6 g/cm 3 , are most conducive to enhancing plate rotation after detonation and increasing the deformation angle. For the variable density laminated charge, assigning the layer in contact with the panel as a low-density layer augments the interference time and range of plate bending deformation on the jet. When the laminated charge density varies in two ways, with a density difference of 0.3 g/cm 3 to 0.4 g/cm 3 , the interference effect of the plate on the jet following detonation is optimized. A protective performance test was conducted for flat charges under small inclination angles. Test outcomes indicated that, at a 30° angle, variable density gradient and laminated flat charges decreased jet penetration depth by 18.2% and 20.8%, respectively, compared to equal density flat charges. This suggests that variable density charges effectively mitigate the angle effect of flat charges and significantly enhance jet interference protection. Test and simulation findings align, offering valuable insights for the design and implementation of safety protection schemes using variable density plate chambers in explosion-proof doors, walls, and other equipment.