A method for the prediction of wing response to non-stationary buffet loads

Title

A method for the prediction of wing response to non-stationary buffet loads

 Author

Lee, B.H.K.

Institution

National Research Council Canada, National Aeronautical Establishment, High Speed Aerodynamics Laboratory

 Date

1980-07-31

 Abstract

A method for the prediction of the response of a wing to nonstationary buffet loads is presented. The time history of the applied load is segmented into a number of time intervals. In each time segment, the nonstationary load is represented by the product of a deterministic shaping function and a statistically stationary random function. An approximate modelling of the load on the wing is given. The wing is divided into panels or elements, and the load is computed from measured or estimated pressure fluctuations at the centre of each panel. A series representation, with terms of the correlated noise type, is used to curve fit the experimentally determined complex buffet pressure power spectral densities. Using the correlated noise form of power spectral density for the random part of the applied load, analytic expressions are derived for the mean square displacement and acceleration response of the wing. An illustration using data available for the F-4E aircraft is included.

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 Publisher

National Research Council Canada

 Access restriction

Campus only

 Source

National Research Council Aeronautical Report LR 601

 Part of collection

Aerospace Engineering Reports

 Document type

report

 Rights

(c)1980 National Research Council Canada
Files
PDF LR-601.pdf 8.94 MB
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