An evaluation of the effects of flexibility on wing strains in rough air for a large swept-wing airplane by means of experimentally determined frequency-response functions with an assessment of random-process techniques employed

Thomas L. Coleman, Harry Press, May T. Meadows
naca-tn-4291
Jul 1958

Power spectral methods of analysis are applied to flight test measurements of the strain responses of a large swept-wing bomber airplane in rough air in order to determine the effects of airplane structural dynamics on the strain responses. Power spectra and frequency-response functions of the strain responses are determined and compared with the estimated results for a quasi-static reference airplane condition.

An Adobe Acrobat (PDF) file of the entire report:
http://naca.central.cranfield.ac.uk/reports/1958/naca-tn-4291.pdf