A fundamental objective of the Army's research and development efforts is to increase the reliability of the Army's airmobility force, which consists primarily of rotary-wing aircraft. Excessive vibrations have always been a problem for helicopters due to the vibratory airloads generated by the main rotor as it moves edgewise through the air. Maintenance and part replacement costs require that potential vibration problems be diagnosed as early as possible in the helicopter development and fielding cycle. A methodology known as Force Determination which was developed in the early 1970's is applicable to early diagnosis of vibration-induced problems. The objective of this program was to evaluate the limitations and accuracy of the Force Determination method. Controlled laboratory experiments and numerous sensitivity studies were performed to assess the validity of this method.
Force Determination Sensitivities Study for Full-Scale Helicopter Ground Vibration Testing
1989
63 pages
Report
Keine Angabe
Englisch
Aircraft , Structural Mechanics , Laboratory & Test Facility Design & Operation , Helicopters , Vibration , Test methods , Shaking , Moments , Ground motion , Dynamics , Mechanical impedance , Calibration , Force determination , Vibration test , Ground flying , Vibratory loads , Dynamic modelling , OH-58A Helicopter , Test results , SBI1 , Fiscal Year 90
Full Scale Helicopter Crash Testing
NTIS | 1988
|Developments in helicopter ground vibration testing
Tema Archiv | 1986
|Full Scale Helicopter Crash Testing
NTIS | 1988
|Engineering Index Backfile | 1952