A Finite Element Analysis of the Dynamic Response of A Thick Uniform Elastic Circular Plate Subjected to an Exponential Blast Loading

Abstract

The result of the study of dynamic response of an elastic circular plate to blast load is presented in this research work. Finite element method is used to derive the equation of motion for the circular plate element under the influence of exponential impulse forces. System stiffness and mass matrices were drive. The effects of transverse shear deformation and rotatory inertia were included. From the numerically simulated results it is observed that the amplitude dies out quickly due to the effect of damping. The pulse duration is also one of the most important parameter because it gives serious influence to the vibration amplitude. It gives rise to the vibration amplitude on any small decrease on the pulse duration. It is also observed that the exponential blast loading brings faster rate of amplitude decay than those of triangular and sinusoidal blast loading.

Blast Valve Design and Related Studies : A Review

“…The key findings of this analytical solution were the time in which the plate comes to rest and the central deflection of plate at the instant. FEM was employed to analyse dynamic behaviour of circular plate under the influence of exponential impulsive forces 51 . Vibration characteristics of damped circular plate were obtained for different loading conditions.…”