Novel Method for Prediction of Nonlinear Aeroelastic Responses.

摘要

The configuration design space and flight regime of new air vehicles is vast. Determination of nonlinear aeroelastic responses, vehicle trim states and vehicle stability is a challenge that must be addressed in an efficient, methodical manner. To accomplish this, we are developing a method for determining and analyzing nonlinear aeroelastic responses using a combination of a continuation method with a variable-fidelity reduced-order model of the flowfield, a nonlinear description of structural response, and a trim model of the air vehicle capturing both rigid body and flexible body motions. This report summarizes the accomplishments made during this funding cycle of the project. These results include new techniques developed for reduced-order modeling using the proper orthogonal decomposition (POD) method, a novel nonlinear beam model, and high-quality grid generator for aircraft with very large wing deformation.