Novel Aspect of Composite Sandwich Fairing Structure Optimization of a Two Stages Launch Vehicle using MDO Independent Subspace Approach

Abstract: In this paper, a novel composite sandwich structure analysis of Launch Vehicle (LV) fairing is considered and proposed by a new Multidisciplinary Design Optimization (MDO) for a two-stage launch vehicle. Accordingly, “Multidisciplinary Design Optimization based on Independent Subspaces” (MDOIS) is employed using the “Fixed Point Iteration” (FPI) method to achieve the best convergence at system level (SL) to segregate the disciplines. Therefore, two proposed subspaces overcome difficulties of common mentioned MDO of LVs. By considering variables as propulsion, trajectory and also composite sandwich fairing structure design regarding to the variables of designing and the performing optimization process, the fairing mass has been reduced more and considerably with respect to the common two stages LVs.