You're invited to attend

“A Novel Aeroelastic Stability Method that Provides
Highly-Informative Spatially Resolved Damping”

by

Nicolas Reveles
Sr. Project Manager | ATA Engineering

Thursday, September 21
3:30 - 4:30 p.m.
Weber SSTIII Classroom 1

About the Seminar: 
ATA Engineering, Inc., (ATA) has pursued development of a new method for obtaining stability data, especially while leveraging prescribed time-domain simulations, such as computational fluid dynamics (CFD). The approach utilizes a known eigenvector of interest that may be derived from classical methods to solve for the corresponding eigenvalue, generally with enhanced right hand side aerodynamic forcing. Whereas typical eigenvalue methods and time-domain perturbation approaches provide only frequency and damping information, this new method is also capable of providing finely detailed surface stability data. The ability to spatially localize contributions to damping is shown to be highly informative and useful to understanding the underlying rationale for a given vehicle’s stability. Additionally, this method is directly compatible with adjoint methods, enabling future aeroelasticians to more readily enhance stability and perform aeroelastic tailoring. This technical seminar will provide a brief derivation of the methodology and then demonstrate its use on multiple aeroelastic stability problems.

About the Speaker:
Dr. Reveles focuses on aeroelastic methods development and rotor aeromechanic analysis at ATA Engineering. His interest in stability analysis was engendered during graduate school at the Georgia Institute of Technology when, in 2010, his research utilizing tightly coupled computational fluid dynamics (CFD) and computational structural dynamics (CSD) fortuitously intersected with an area of exigent importance being examined by the Army at Moffett Field (then the Aeroflightdynamics Directorate [AFDD]): lead-lag stability of rotary wing vehicles. This provided him the opportunity to help Bell Helicopter bring these tightly coupled perturbation stability analysis tools in-house, where they were put to immediate use. Nonetheless, the associated high computational costs of these tools combined with the relatively limited insights the perturbation method provided left the strong impression that a new approach was needed. After completing his dissertation, Dr. Reveles joined ATA, where he continued to be involved in stability analyses for a wide variety of vehicles and structures, prompting the gradual development of the new stability analysis approach that is the focus of his talk today.