Review of parametric optimization design for solid rocket motors

Parametric optimization serves as a crucial means for addressing the multi-dimensional, multidisciplinary, nonlinear, and strongly coupled optimization challenges in solid rocket motor design. This research first reviews the application of parametric optimization methods in motor design across five aspects: grain structural design, nozzle contour design, casing design, overall motor design, and motor optimization considering overall rocket performance. Common technical challenges and general technical routes are summarized. Second, the technical characteristics of motor parametric optimization are discussed from three perspectives: parametric structural optimization, engineering practice constraints, and aerospace digitization. Finally, it identifies five existing technical challenges in parametric optimization design for solid motor and proposes four future research directions. The development of parametric optimization design technology is of great significance for enhancing performance limits, shortening development cycles, and promoting technological innovation.