TY - JOUR AU - Shrinivas Bhat AU - Ranjan Ganguli PY - 2004/10/01 Y2 - 2024/03/29 TI - Validation of Comprehensive Helicopter Aeroelastic Analysis with Experimental Data JF - Defence Science Journal JA - DSJ VL - 54 IS - 4 SE - Aeronautical Systems DO - 10.14429/dsj.54.2056 UR - https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/2056 AB - The experimental data for a Cbladed soft-inplane hingeless main rotor is used to validate a comprehensive aeroelastic analysis. A finite element model has been developed for the rotorblade which predicts rotating frequencies quite well, across a range of rotation speeds. The helicopter is trimmed and the predicted trim-control angles are found to be In the range ofmeasured values for a variety of flight speeds. Power predictions over a range of forward speeds also compare well. Finally, the aeroelastlc analysis is used to study the Importance ofaerodynamic models on the vibration predict~onU. nsteady aerodynamics and free-wake models have been investigated. ER -