Accident Simulation and Event Reconstruction


Accident Simulation and Event Reconstruction

The tradition and vocation to modeling and simulation applied to the Safety realm drove the PSE-Lab to build two computer programs AXIM and DETONIM.

This is the hierarchical structure of the Accident Simulation and Event Reconstruction section:

  • Accident Simulation
    • Dynamic simulation of industrial accidents
    • Dynamic simulation of transportation accidents
    • Coupling of accident simulator and process simulator
    • 3D virtual environments for accident simulation
    • AXIM
      • Features
        • Capability of simulating events whose conditions (e.g., emission, weather, triggering events) are continuously varying and not defined a priori
        • Weather dependency
          • Cloud coverage
          • Wind velocity
          • Wind direction
          • Air humidity
          • Air temperature
          • Solar radiation
          • Latitude
          • Hour, day, month of the year
        • Ground dependency
          • Water
          • Soil
            • Terrain
            • Peeble
            • Asphalt
        • Liquid and gas emission
          • From industrial equipment
          • From tanks, vessels, …
        • Liquid spreading
          • Pool formation on different grounds
            • Soil, terrain, asphalt
            • Water
        • Gas dispersion
          • Dense gas
          • Neutral/buoyant gas
          • Spray
        • Ignition
        • Pool fire
        • Flash fire
        • Jet fire
        • Fireball
      • DLL structure and interaction with external programs through a server/client architecture
    • Consequence analysis and quantification of industrial and transportation accidents
      • Gas profile concentration
        • IDLH, LC01, LC50, LC99, LD01, LD50, LD99
        • AEGL, ERPG, TEEL
      • Radiation
        • On equipment
        • On human beings
          • Burns
          • Lethal threshold
      • Overpressure
        • After deflagration
        • After detonation
    • Consequence analysis and quantification of detonation of solid explosives
      • Solid explosive analysis and TNT equivalence
        • RDX, ANFO, PDL, PETN, HMX, TORP, PCLA
        • Ammonium nitrate
        • Rockets propellant
      • Solid explosive
        • Loose explosive
        • Munition explosive in metal casing
          • Bullets
          • Bombs
          • Grenades
          • Missiles
      • Analytic evaluation of overpressure and impulse
        • Solution of direct and inverse problems
          • Direct problem: overpressure at a given distance and given amount of solid explosive
          • Indirect problem: determine the maximum amount of solid explosive (either loose or munitions)  to produce a threshold limit of overpressure/impulse at a given distance
      • Consequences and design for safety
        • Overpressure
        • Impulse
        • Fireball
        • Heat radiation
        • Seismic wave
        • Gas concentration of burnt substances
        • Production of fragments
          • Density of fragments
          • Energy of fragments
          • Fragments distribution
          • Range of fragments
          • Probability of impact with still and moving targets
      • Role of safety walls and embankments
        • Heavy- and Light-weight concrete
        • Composite materials for roofs
        • Other mitigation barriers
      • Over-the-ground and under-the-ground depots

 

  • Accident Event Reconstruction
    • BP explosion and fire at Texas City Refinery on March 23rd, 2005
    • Viareggio LPG railway accident on June 29th, 2009
    • Consequences analysis