3 . 6 System Integration and Simulations

This year’s efforts were devoted to extending the Rocstar version 3 rocket simulation package in several mission-critical areas: time zooming, surface propagation, and mesh modification. These capabilities were verified and applied to several large-scale simulations, including slumping in the Titan, complete propellant burn-out in a tactical motor, and substantial propellant burn-back in the RSRM. Significant effort was also devoted to devising how to reduce the number of lengthy simulations that must be run in order to quantify the effect of uncertainties in input physical parameter values on uncertainties in our simulation results.