Numerical research on the response of sandwich plate subjected to explosion based on the random distribution of fragments
In order to study the damage characteristics of sandwich panels under the combined action of shock wave and randomly distributed fragments under airburst load,this paper realizes the structural response analysis of sandwich pan-els under the combined action of shock wave and fragments based on the simulated random fragmentation field.Structural response of the folded metal sandwich plate under air explosion is studied using the explicit finite element package LS-DYNA.According to the quantity of explosive and the thickness of the shell,a fragment field whose area distribution meets the requirements of the probability function is generated,a series of simulations are carried out to analyze the damage of the metal sandwich plate structure on the premise of verifying the effectiveness of the simulation method.The results show that the damage patterns of sandwich panels are similar in the case of random fragmentation with different distributions at the same density.Under different densities,the overall fracture area of the sandwich panel decreases with the increase of frag-ment density,and the energy absorption effect decreases.The research work has reference significance for the anti-blast design of ship structures.
joint actionthe random distribution of fragmentssandwich plate
万方数据
维普
