A multidisciplinary sensitivity analysis of rotorcraft simulations involving tightly coupled high-fidelity computational fluid dynamics and comprehensive analysis solvers is presented and evaluated. A sensitivity-enabled fluid-dynamics solver and a nonlinear flexible multibody-dynamics solver are coupled to predict aerodynamic loads and structural responses of helicopter rotor blades. A discretely consistent adjoint-based sensitivity analysis available in the fluid-dynamics solver provides sensitivities arising from unsteady turbulent flows and unstructured dynamic overset meshes, whereas a complex-variable approach is used to compute structural sensitivities with respect to aerodynamic loads. The multidisciplinary sensitivity analysis is conducted through integrating the sensitivity components from each discipline of the coupled system. Sensitivities of lift computed by the multidisciplinary sensitivity analysis are verified by comparison with the sensitivities obtained by complex-variable simulations. The multidisciplinary sensitivity analysis is applied to a constrained gradient-based design optimization for a HART-II rotorcraft configuration.


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    Title :

    High-Fidelity Multidisciplinary Sensitivity Analysis and Design Optimization for Rotorcraft Applications


    Contributors:

    Published in:

    AIAA Journal ; 57 , 8 ; 3117-3131


    Publication date :

    2019-08-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English








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