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New Method for Analyzing the Flutter Stability of Hingeless Blades with Advanced Geometric Configurations in Hovering
Joint Authors
Han, Jinglong
Yun, Haiwei
Wang, Si-wen
Chen, Quan-long
Chen, Xiao-mao
Source
International Journal of Aerospace Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-02-17
Country of Publication
Egypt
No. of Pages
16
Abstract EN
A new method used to analyze the aeroelastic stability of a helicopter hingeless blade in hovering has been developed, which is especially suitable for a blade with advanced geometric configuration.
This method uses a modified doublet-lattice method (MDLM) and a 3-D finite element (FE) model for building the aeroelastic equation of a blade in hovering.
Thereafter, the flutter solution of the equation is calculated by the V-g method, assuming blade motions to be small perturbations about the steady equilibrium deflection.
The MDLM, which is suitable to calculate the unsteady aerodynamic force of nonplanar rotor blade in hovering, is developed from the doublet-lattice method (DLM).
The structural analysis tool is the commercial software ANSYS.
The comparisons of the obtained results against those in the literatures show the capabilities of the MDLM and the method of structural analysis.
The flutter stabilities of swept tip blades with different aspect ratios are analyzed using the new method developed in this work and the usual method on the basis of the unsteady strip theory and beam model.
It shows that considerable differences appear in the flutter rotational velocities with the decrease of the aspect ratio.
The flutter rotational velocities obtained by the present method are evidently lower than those obtained by the usual method.
American Psychological Association (APA)
Wang, Si-wen& Han, Jinglong& Chen, Quan-long& Yun, Haiwei& Chen, Xiao-mao. 2020. New Method for Analyzing the Flutter Stability of Hingeless Blades with Advanced Geometric Configurations in Hovering. International Journal of Aerospace Engineering،Vol. 2020, no. 2020, pp.1-16.
https://search.emarefa.net/detail/BIM-1167964
Modern Language Association (MLA)
Wang, Si-wen…[et al.]. New Method for Analyzing the Flutter Stability of Hingeless Blades with Advanced Geometric Configurations in Hovering. International Journal of Aerospace Engineering No. 2020 (2020), pp.1-16.
https://search.emarefa.net/detail/BIM-1167964
American Medical Association (AMA)
Wang, Si-wen& Han, Jinglong& Chen, Quan-long& Yun, Haiwei& Chen, Xiao-mao. New Method for Analyzing the Flutter Stability of Hingeless Blades with Advanced Geometric Configurations in Hovering. International Journal of Aerospace Engineering. 2020. Vol. 2020, no. 2020, pp.1-16.
https://search.emarefa.net/detail/BIM-1167964
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1167964