Accession Number:

ADA109181

Title:

Structural System Identification Technology Verification

Descriptive Note:

Final rept.

Corporate Author:

KAMAN AEROSPACE CORP BLOOMFIELD CT

Report Date:

1981-11-01

Pagination or Media Count:

218.0

Abstract:

Structural system identification is the method of obtaining structural and dynamic mathematical models and improving existing mathematical models using ground vibration test data. The purpose of the subject program was to perform experimental, development, and research work to verify the concepts of structural system identification technology. To accomplish this, system identification techniques were applied to a U. S. Army AH-1G helicopter fuselage to create a mathematical model from ground vibration test data, to improve a reduced model of an existing NASTRAN model of the AH-1G using shake test data, and to test the effectiveness of these new mathematical models in predicting the effects of stiffness and mass changes to the airframe. The results of the program indicate that system identification is a viable and cost-effective technique for developing new models and for improving existing finite-element models of an airframe using ground vibration test data. Author

Subject Categories:

  • Helicopters
  • Numerical Mathematics
  • Structural Engineering and Building Technology
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE