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Identification of nonlinear model for rotary high aspect ratio flexible blade using free vibration response

Mahariq, I ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1016/j.aej.2020.01.029
  3. Publisher: Elsevier B. V , 2020
  4. Abstract:
  5. Nonlinear identification of a narrow cantilever blade undergoing free vibration was studied. In the absence of forced excitation and because of general data deficiency of this system, the current identification methods cannot be applied with sufficient accuracy. A new identification approach was introduced in the present study based on nonlinear free vibration decay. Nonlinear free response of the presented system is determined by the coupling of generalized variation iteration and the modified differential transformation methods. The comparisons between the experiments and calculations is highlighted the good accuracy of the identified nonlinear model. © 2020 Faculty of Engineering, Alexandria University
  6. Keywords:
  7. Blade ; Helicopter ; Aspect ratio ; Helicopters ; Iterative methods ; Nonlinear systems ; Differential transformation methods ; Free vibration response ; Generalized variation ; Identification approach ; Non-linear free vibration ; Nonlinear identifications ; Vibration ; Mathematical transformations
  8. Source: Alexandria Engineering Journal ; Volume 59, Issue 4 , August , 2020 , Pages 2131-2139
  9. URL: https://www.sciencedirect.com/science/article/pii/S1110016820300302