AH-1G flight vibration correlation using NASTRAN and the C81 rotor/airframe coupled analysisAnalytical results are presented bearing on the accuracy of state-of-the-art NASTRAN FEM modeling techniques and rotor/airframe coupling methods for the prediction of flight vibrations; these results have been studied by NASA and industry experts in order to ensure scientific control of the analysis/correlation exercise. The rotor loads predicted by the dynamically coupled rotor/airframe analysis showed good agreement between calculated and experimental blade loads, as did the predominant excitation frequency vibration levels predicted by NASTRAN.
Document ID
19870031931
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Dompka, R. V. (Bell Helicopter Co. Fort Worth, TX, United States)
Corrigan, J. J. (Bell Helicopter Textron Fort Worth, TX, United States)