Abstract
To improve the anti-explosion performance of blast wall in offshore platforms, an auxetic re-entrant blast wall (ARBW) was proposed and designed based on the indentation resistance effect of an auxetic structure. Based on the numerical nonlinear dynamic analysis method verified by the explosion experiment of a conventional steel corrugated blast wall (CBW), the failure mechanisms of ARBW, steel honeycomb sandwich blast wall (HSBW) and CBW were investigated under distributed impulse loads. Computational results demonstrated the excellent anti-explosion performance of the proposed ARBW design. Concerning the minimal deformation at the mid-point of the proposed protective structures, the ARBW performed best. As regards the minimal deformation at the connection, both ARBW and HSBW worked well. The stress distribution of the connection illustrated the different energy absorption and transmission modes of the three blast walls.
Highlights
Studies on impulse destruction are an important part of marine engineering protective design
The analysis method in the design guidance of protective structures has developed from single degree of freedom (SDOF) to nonlinear finite element analysis (NLFEA) [3,4,5], the typical design scheme in the guidance is a blast wall made by a corrugated plate
Christian W. et al [8] carried out an investigation into the influence of inclined angle of a Vee stiffener used on a blast wall structure
Summary
Studies on impulse destruction are an important part of marine engineering protective design. Different protective structures lead to disparate anti-explosion performances under the same impulse loading. A popular form of protective structures is corrugated blast wall (CBW), which has been applied to offshore platforms due to its considerable blast-resistant performance and easy availability. The results showed that the alteration of the inclined angle had a considerable effect on the dynamic response of the blast wall structure. These methods offer a certain reinforcement to the CBW, but the reinforcement is somewhat limited. New shapes of blast wall with high anti-explosion performance need to be studied. New shapes of blast wall with high anti-expl2osoifo1n2 performance need to be studied. RThBeWfaailnudreHmSBecWhahnaisvme eoxfctehlrleenetkeinnedrsgoyfabblsaostrpwtiaolnl apreerrfeovrmeaalendc.e.The computational results showed that both the ARBW and HSBW have excellent energy absorption performance
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