Structural modification to achieve antiresonance in helicopters
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A design method is developed to create an antiresonance (by modifying structural properties) of a vibrating system under sinusoidal loading. A local modification method in which appendant systems are added to the original structure is used to analyze such systems. Since the original system and added systems are treated entirely separately, this method allows for efficient repetitive searching until the appendant system produces a meaningful reduction in vibration. Finally, the direct design of appendant structures to create antiresonance is presented. These methods are illustrated by numerical results obtained for a 44-degree-of-freedom elastic line helicopter model. © 1982 American Institute of Aeronautics and Astronautics, Inc., All rights reserved.
author list (cited authors)
Wang, B. P., Kitis, L., Pilkey, W. D., & Palazzolo, A.