Simulation and Analysis of Failure and Rupture of Spherical Pressure Vessel Under the Effect of Blast Load

The performance of energy infrastructure under extreme loading conditions, especially under blast conditions, is of great importance despite the low probability of such events occurring. Due to the catastrophic consequences of foundation failure, it is very important to improve the resistance of energy infrastructure against blast effects. The TNT equivalence method was used to simulate the explosion of crude oil gas vapor cloud when analyzing the dynamic response of the spherical Pressure vessel under the pressure of external explosion loads. The pressure distribution on the surface of a ۱۰۰۰ cubic meter spherical Pressure vessel has been investigated. The dynamic response of the Pressure vessel, such as effective stress distribution, structural displacement, failure modes and energy distribution under blast loads, was studied and the simulation results showed that the pressure reflected on the spherical Pressure vessel gradually decreased from the equator to the poles of the sphere. finds However, the effects of turbulent wave reflection on the plume are not obvious. The structural damage in the Pressure vessel under the blast load includes partial foundation failure at the turning point of the deformation and the center of significant stress, which can be seen in the connection between the column and the spherical bottom shell. The main reason for significant deformation and structural damage is caused by the initial internal energy that the Pressure vessel has gained from the blast wave. The liquid inside the reservoir absorbs the energy of the impact loads and reduces the response in the initial stage of damage after the impact of the explosion.

کلیدواژه ها:

Spherical Vessel ، TNT ، Explosion ، Failure ، Rupture