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Determination of subcritical frequency and damping from B-1 flight flutter test data

Steven K. Dobbs, C. H. Hodson

Abstract

The application of the time-lag products correlation/frequency analysis procedure to determine subcritical frequency and damping from structural response measurements made during flight flutter test of the B-1 prototype airplane is described. The analysis procedure, the test airplane, and flight test procedures are discussed. Summary frequency and damping results are presented for six transonic flight conditions. Illustrative results obtained by applying various options and variations of the analysis method are included for one flight condition.

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Key concepts: Flutter, Airplane, Transonic, Flight test, Engineering, Frequency response, Structural engineering, Control theory (sociology)