Analysis of Explosion Load in a Cylindrical Container With Sand Bottom

Abstract

Explosion containment vessels are widely used in many fields. Here the detonation impact load of explosives in a cylindrical closed explosion containment vessel partially filled with sandy soil was studied. A three-dimensional numerical model of the explosion containment vessel was established by using finite element code LS-DYNA. To calibrate this numerical model, we carried out an explosion loading experiment of the explosion containment vessel. Then the experimental data and the numerical simulation results were compared, and a good agreement between them was obtained. The calibrated numerical model was used to investigate the explosive impact load generated by explosives in a cylindrical explosion containment vessel. The results reveal the attenuation law of shock wave overpressure and the distribution characteristics of the maximum peak overpressure of the shock wave on the inner wall of the cylindrical explosion containment vessel.

Theoretical and Numerical Analysis of Blasting Pressure of Cylindrical Shells under Internal Explosive Loading

“…Although the propagation process of explosion shockwaves in cylindrical shells is complex, it is generally believed that the first shockwave plays a crucial role in the process of the cylindrical shell's deformation [8,23]. The explosion load on the inner wall of the cylindrical shell decreases with the increase in the radius of the cylindrical shell; if the explosion is at the axis, the load can be simplified as a spindle-shaped load.…”

“…In 1958, Baker and Allen [7] first established a general response theory for spherical shells of arbitrary thickness, showing that even "thin-shell" equations of motion can accurately describe relatively thick shells. In 1960, Baker [8] proposed a theory for predicting the elastic-plastic response of thin spherical shells subjected to transient loads. Duffey et al [9] studied the approximate expression of the ultimate circumferential strain (or radial displacement) versus the axial coordinates of a cylindrical shell, when a spherical explosive charge was loaded at the center.…”