Strain-Gage Loads Calibration Parametric Study (Paperback) (ISBN-13: 9781287288237)

This paper documents a parametric study of various aircraft wing-load test features that affect the quality of the resultant derived shear, bending-moment, and torque strain-gage load equations. The effect of the following on derived strain-gage equation accuracy are compared: single-point loading compared with distributed loading, variation in applied test load magnitude, number of applied load cases, and wing-box-only compared with control-surface loading. The subject of this study is an extensive wing-load calibration test of the Active Aeroelastic Wing F/A-18 airplane. Selected subsets of the available test data were used to derive load equations using the linear regression method. Results show the benefit of distributed loading and the diminishing-return benefits of test load magnitudes and number of load cases. The use of independent check cases as a quality metric for the derived load equations is shown to overcome blind extrapolating beyond the load data used to derive the load equations.

Author: Nasa Technical Reports Server (Ntrs)
ISBN-10: 1287288235
ISBN-13: 9781287288237
Publisher: Bibliogov
Language: English
Published: 08/06/2013
Pages: 32
Format: Paperback
Weight: 0.17lbs
Size: 9.69h x 7.44w x 0.07d