Study on the influence of the preformed hole size characteristics on the dynamic response of the cylindrical shell under blast loading

The structural response of a cylindrical shell with pre-formed holes subjected to explosive impact loading can be efficiently modeled using the ALE coupling model. The damage process and measurement of point deflection were analyzed based on the results of simulation. Results demonstrated that the pre-formed holes on cylindrical shells will destroy their structural strength. This finding will easily lead to stress concentration, which may affect the damage process and decrease the anti-blast ability of cylindrical shells subjected to explosive impact loading. The pre-formed holes can reduce the load area and weaken the effect of impact loading. Change in hole spacing will influence these factors and affect the deformation of cylindrical shell. The location of the break is different when the distance between the holes is different.