Technical Note: Exploratory Investigation of Time‐Finite‐Element and Fast‐Floquet Methods for Trim and Stability Analysis
Abstract:A numerical technique based on combining time‐finite‐element and fast‐Floquet methods is presented for linearized perturbation equations about the steady‐state solution. Numerical results for a two‐bladed horizontal‐axis wind turbine show that this combination reduces the number of equations and unknowns in the discretized equations, thus leading to a reduction in computational effort for finding the Floquet transition matrix. Because the approach leads to an improvement over a straightforward use of time‐finite elements for wind‐turbine problems, a similar level of improvement may be expected for rotorcraft problems.
Document Type: Research Article
Affiliations: Georgia Institute of Technology Atlanta, GA
Publication date: April 1, 2005
The Journal of the American Helicopter Society is the world's only scientific journal dedicated to vertical flight technology. It is a peer-reviewed technical journal published quarterly by AHS International and presents innovative papers covering the state-of-the-art in all disciplines of rotorcraft design, research and development. (Please note that AHS members receive significant discounts on articles and subscriptions.)
Journal subscribers who are AHS members log in here if you are not already logged in.
Authors can find submission guidelines and related information on the AHS website.