舱室模型内爆炸载荷下预制孔板的变形规律

In order to investigate the dynamic response of plates with preformed holes under internal blast load in the cabin model,the deformations of the plates with offset preformed holes and the plates with uniform preformed holes in the cabin model were experimentally investigated.The results are also compared with that of the plates with non-preformed holes.The numerical calculation of the internal blast load was carried out by using established simulation model of cabin.The distribution of internal blast shock waves at typical gauge points was analyzed and the deformation rules of plates with preformed holes were studied as well.The research results indicate that the effect of gain of deflection deformation obtained from decreasing local strength due to the preformed holes is greater than that of the blast venting.The shock wave exhibits the reflection and convergence phenomena inside the cabin model and a quasi-static feature during the late stage of milliseconds.The simulation results are consistent with the experimental ones.At the same time,there are differences between the thinning rates in different areas of the plates with preformed holes.The current research can provide reference for the analysis of the mechanism of coupling damage between shock wave and fragments in the cabin.