Computational Mechanics Approach for Multidisciplinary Nonlinear Sensitivity Analysis

摘要

The primary objective of this research work was to develop preliminary designs of aircraft wing/store configurations to achieve improved flutter performance in the transonic regime. In this research work, a methodology was developed to incorporate the nonlinearities associated with the wing and store in transonic regime into the multidisciplinary environment. Investigated the aeroelastic effects of the wing with and without the inclusion of store aerodynamics. The tip store configurations and underwing store configurations were analyzed independently. The results indicated that the inclusion of tip and underwing store aerodynamics does not have any significant impact on the flutter velocity in the transonic regime for these wing/store configurations. Mathematical optimization techniques were used for redesigning the wing structure. The research work addressed the need for higher fidelity aerodynamic analysis in preliminary design stages of aircraft design. Particularly, these findings are useful for store certification.