Propeller Blade Vibration:Nature and Severity of Vibration at Edgewise Resonance as Influenced by Coupling Effects due to Blade Twist

摘要

Information was required as to the stress distribution in propeller blades occurring at edgewise resonance, and the importance of this vibration relative to the other modes.nTests were carried out on a duralumin-bladed propeller so mounted that the dynamical system was equivalent to an engine and propeller subjected to engine torsional oscillation. The fundamental edgewise vibration and its interaction with the adjacent second overtone flapping vibration was investigated for non-rotating conditions.