Additional Los Alamos RAGE Hydrocode Simulations of Effective Mitigation of Porous PHO Objects

Details Additional Los Alamos RAGE Hydrocode Simulations of Effective Mitigation of Porous PHO Objects Additional Los Alamos RAGE Hydrocode Simulations of Effective Mitigation of Porous PHO Objects

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21822405w&link_type=abstract

American Astronomical Society, AAS Meeting #218, #224.05; Bulletin of the American Astronomical Society, Vol. 43, 2011

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In this presentation we show new RAGE hydrocode simulations of the effective disruption and mitigation of Earth bound asteroids and other Potentially Hazardous Objects (PHOs) by a strong explosion. This is just one possible method of impact-hazard mitigation. We present RAGE hydrocode models of the shock-generated disruption of PHOs by surface/subsurface nuclear bursts using scenario-specific models from realistic RADAR shape models. The RAGE code has been extensively verified and validated (V&V) We will show 2D models for the disruption by a large energy source at various depths-of-burial on such PHO models ( 100 kton - 10 Mton), specifically for the shape of the asteroid 25143 Itokawa. We study the effects of non-uniform composition (rubble pile), porosity, effective source energy, and the optimal depth of burial from the surface explosion to the central explosion. The results of our actual hydrocode modeling shows that the resultant asteroid fragments are given sufficient velocity to escape gravitational recombination and results in effective mitigation of the hazard for 300 m size objects.

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