Abstract
OFFSHORE INSTALLATIONS ACTIVITIES ENTAIL THE HAZARD OF EXPLOSION ACCIDENTS WITH POTENTIALLY SEVERE CONSEQUENCES TO SAFETY OF WORKERS, INTEGRITY OF SYSTEM, POLLUTION OF THE ENVIRONMENT, AND ECONOMIC LOSSES. BLAST WALLS ARE GENERALLY USED FOR THE PURPOSE OF REDUCING THE EXPLOSION CONSEQUENCES. THIS STUDY INTRODUCE A NEW CONCEPT OF BLAST WALL (PERFORATED BLAST WALL) WHICH CAN DISRUPT LOAINDG PRESSURE DURING THE EXPLOSION. A DYNAMIC FINITE ELEMENT ANALYSIS WAS PERFORMED TO INVESTIGATE THE EFFECTS OF THE GEOMETRIC CHARACTERISTICS ON THE PERFORMANCE OF PERFORATED BLAST WALLS. A SERIES OF COMPUTATIONS WERE PERFORMED VARYING WITH OPENING SIZE, PLATE THICKNESS AND OPENING LAYOUT ASSOCIATED WITH BLOCKAGE RATIO. A PROPOSAL FORMULA WAS DERIVED AS A FUNCTION OF THOSE DESIGN PARAMETERS FOR EASILY EXPECTING THE DYNAMIC STRUCTURAL RESPONSE CHARACTERISTICS.
Highlights
During the installation or operation, offshore installations can be threatened extreme or accidental events in association with site-specific met-ocean, operational conditions, or other factors
It is observed that more sensitive change is shown at the thinner plate while effect of Blockage Ratio (BR) is negligible at the thicker plate
This paper analyzed the effect of geometric characteristics on the dynamic structural response of the perforated blast walls
Summary
During the installation or operation, offshore installations can be threatened extreme or accidental events in association with site-specific met-ocean, operational conditions, or other factors. These events sometimes have catastrophic consequences that lead to heavy casualties, property damage, and pollution. Hydrocarbon explosions can occur on all platforms because they are usually related to the release of hydrocarbon. To reduce the significant loss of structural integrity against the explosion, a substantial amount of effort have been directed towards mitigation system which can reduce the effect of accidents on the exposed structure (API, 2006; DNVGL 2010&2014; ABS, 2013; LR, 2014; ISSC, 2015; Oil & Gas, 2007). Passive mitigation systems are preferred as they do not rely on the detection and deployment mechanisms, but they are always activated. There are four approaches in the passive mitigation system including impedance mismatching, sacrificial cladding, blast deflection and blast and shockwave disruption (Langdon et al, 2010)
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