Vibrational behavior of rotating helicopter blades incorporating adaptive capabilities

Ohseop Song; Liviu I. Librescu

doi:10.1117/12.152773

8 September 1993 Vibrational behavior of rotating helicopter blades incorporating adaptive capabilities

Ohseop Song, Liviu I. Librescu

Proceedings Volume 1917, Smart Structures and Materials 1993: Smart Structures and Intelligent Systems; (1993) https://doi.org/10.1117/12.152773
Event: 1993 North American Conference on Smart Structures and Materials, 1993, Albuquerque, NM, United States

Abstract

An integrated distributed actuator design methodology based upon the converse piezoelectric effect and aimed at actively controlling the in-vacuo eigenvibration characteristics of rotating helicopter blades is presented. The system of piezoelectric actuators bonded or embedded into the structure produces a localized strain field in response to an applied voltage and, as a result, it yields an adaptive change of dynamic response characteristics. The helicopter blade is modeled as a thin/thick walled closed cross-section untwisted cantilevered beam rotating with constant angular velocity. The considered numerical illustrations reveal the power of the adaptive technology to control the dynamic characteristics of rotating blade structures and, as a result, to avoid their structural resonance as well as any of their dynamic instabilities.

Citation Download Citation

Ohseop Song and Liviu I. Librescu "Vibrational behavior of rotating helicopter blades incorporating adaptive capabilities", Proc. SPIE 1917, Smart Structures and Materials 1993: Smart Structures and Intelligent Systems, (8 September 1993); https://doi.org/10.1117/12.152773

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