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Opportunity at Air Force Research Laboratory (AFRL)

Computational Nonlinear Aeroelasticity

Location

Aerospace Systems Directorate, RQ/Aerospace Structures, Aerodynamics, and Flight Controls

RO# Location
13.30.07.B4617 Wright-Patterson AFB, OH 454337542

Advisers

Name E-mail Phone
Beran, Philip S. philip.beran@us.af.mil 937.713.7217

Description

Through computational physics, we are studying the nonlinear, physical interactions that can occur between fluid and structure, and their impact on the performance and reliability of the air-vehicle system. While such interactions are of interest in all speed regimes (low-speed to hypersonic), the highly unsteady interactions between light, deformable flapping wings and surrounding low-Reynolds number flows associated with micro air vehicles (MAVs) are of particular interest. Opportunities to exploit key nonlinear behaviors to enhance system behavior are sought computationally. Another key goal is to be able to quantify uncertainties in the dynamic responses of aeroelastic systems, subject to system and environmental variability (e.g., variable structural properties, flowfield gusts and turbulence spectra, flaws, damage), and to use these quantifications to develop more reliable and robust designs. Topics of specific interest include (1) system modeling of flapping wing MAVs; (2) structural and actuation optimization (including topological optimization) of MAVs to exploit nonlinear behaviors for improved performance and to improve controllability and handling characteristics; (3) development of higher order methods for transient and time-periodic analysis, and their application to multidisciplinary sensitivity analysis, optimal control, and uncertainty quantification; (4) development of educed order modeling methods suitable for nonlinear, dynamic systems; (5) hierarchical (multifidelity) approaches for system modeling and design; (6) propagation, surrogate, and sampling methods for fast uncertainty quantification and reliability-based design of aeroelastic systems; and (7) experimental testing (e.g., in the area of nonlinear structural dynamics) to obtain data for the purpose of model validation.

 

Keywords:
Modeling; Simulation; Aerodynamics; Structures; Flutter; Bifurcation; Computation; Parallel; Oscillation;

Eligibility

Citizenship:  Open to U.S. citizens
Level:  Open to Postdoctoral and Senior applicants
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