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

Alexandria Engineering Journal

Mobin Kavyanpoor¹  Ibrahim Mahariq²  Mohammad Alhuyi Nazari³  Mohammad Ghalandari³  Dieu Tien Bui⁴ 

[1] Corresponding authors.;College of Engineering and Technology, American University of the Middle East, Kuwait;Department of Aerospace Engineering, Sharif University of Technology, Tehran, Iran;Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran;

关键词: Nonlinear identification;    Vibration;    Helicopter;    Blade;   

DOI  :  

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown