DYNABlast 1.1 – Development of an educational software to simulate blast loads in plates

Resumo

Explosions, such as the one in the port of Beirut (Lebanon), have become increasingly frequent, highlighting the need for more in-depth studies on the dynamic behavior of structures subjected to blast loads. In this context, DYNABlast 1.1 was developed in Matlab® environment as an analytical software to simulate the behavior of Kirchhoff plates under explosive loads, evaluating displacements, strains, stresses, and natural frequencies. The software uses a SDOF (Single Degree of Freedom) model based on von Karman's theory, which is viable for simplified structures since most of the energy from an explosion is concentrated in the fundamental mode of the structure. This study focuses on simply supported plates subjected to explosive loading, considering geometric nonlinearity and the immovable membrane condition. DYNABlast was validated by comparing its results with numerical simulations performed by the Finite Element software ABAQUS 6.14-1, focusing on the positive, negative, and extended positive phases of the explosion.