Incidencia del tiempo de arribo de onda en la respuesta de tanques sometidos a explosiones externas

MARIANO P. AMEIJEIRAS; LUIS A. GODOY

Buenos Aires

Congreso; PANACM 2015 - Buenos Aires; 2015

AMCA

The stability analysis of shells under step loading has been studied in a number of publications and is currently based on a criterion due to Budiansky, in which the non-linear dynamic response is investigated for several load levels until a large displacement response is obtained for a small load increment. However, there are problems in the identification of dynamic buckling in cases in which pressures alternate their values, such as under seismic loads, or for pressures with very short duration, such as in cases of explosions. This work is motivated by the investigation of the non-linear dynamic response of oil storage tanks under lateral pressures due to an adjacent explosion. Computations of non-linear dynamic response have been carried out using a general purpose finite element code. Numerical studies are presented for a case study under impulses of different durations. Several dynamic buckling criteria are applied, including those reported by Budiansky, Kounadis, Simitses, Lindberg, Virella et al. Following the impact of the pressures exerted by an explosion, the shell restores the elastic energy and does not advance into non-elastic states, thus causing difficulties in the identification of dynamic buckling.