The issues of significant stress and strain concentration within the prop-rotor blades caused by large negative twist and swept tips were addressed herein.By 3D structural dynamics mod-el,rotor aerodynamics model,and rotor trim methods,a comprehensive model of composite prop-rotor was developed,and the aeroelastic loads of composite prop-rotor were analyzed,and the accura-cy of the synthesis model was validated through hover experiments.The analysis of aero-elastic char-acteristics was performed for rotor blades with zero twist,large negative twist,and large negative twist with swept tips.The results indicate that the large negative twist enlarges the stress concentra-tion area,while the swept tip makes the stress concentration at the swept transition area larger and the degree of concentration worsens.
维普
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