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Dynamic Gust Load Analysis for Rotors
Joint Authors
Yang, Chao
Wang, Linpeng
Zhang, Xintan
Dai, Yuting
Source
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-01-10
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
Dynamic load of helicopter rotors due to gust directly affects the structural stress and flight performance for helicopters.
Based on a large deflection beam theory, an aeroelastic model for isolated helicopter rotors in the time domain is constructed.
The dynamic response and structural load for a rotor under the impulse gust and slope-shape gust are calculated, respectively.
First, a nonlinear Euler beam model with 36 degrees-of-freedoms per element is applied to depict the structural dynamics for an isolated rotor.
The generalized dynamic wake model and Leishman-Beddoes dynamic stall model are applied to calculate the nonlinear unsteady aerodynamic forces on rotors.
Then, we transformed the differential aeroelastic governing equation to an algebraic one.
Hence, the widely used Newton-Raphson iteration algorithm is employed to simulate the dynamic gust load.
An isolated helicopter rotor with four blades is studied to validate the structural model and the aeroelastic model.
The modal frequencies based on the Euler beam model agree well with published ones by CAMRAD.
The flap deflection due to impulse gust with the speed of 2m/s increases twice to the one without gust.
In this numerical example, results indicate that the bending moment at the blade root is alleviated due to elastic effect.
American Psychological Association (APA)
Dai, Yuting& Wang, Linpeng& Yang, Chao& Zhang, Xintan. 2016. Dynamic Gust Load Analysis for Rotors. Shock and Vibration،Vol. 2016, no. 2016, pp.1-12.
https://search.emarefa.net/detail/BIM-1119355
Modern Language Association (MLA)
Dai, Yuting…[et al.]. Dynamic Gust Load Analysis for Rotors. Shock and Vibration No. 2016 (2016), pp.1-12.
https://search.emarefa.net/detail/BIM-1119355
American Medical Association (AMA)
Dai, Yuting& Wang, Linpeng& Yang, Chao& Zhang, Xintan. Dynamic Gust Load Analysis for Rotors. Shock and Vibration. 2016. Vol. 2016, no. 2016, pp.1-12.
https://search.emarefa.net/detail/BIM-1119355
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1119355