Geometrically Exact Aeroelastic Stability Analysis of Composite Helicopter Rotor Blades in Hover by Updated VABS

Accurate methods for geometrically exact aeroelastic stability analysis of composite helicopter rotor blades in hover have been proposed in this paper. The aeroelastic model is established by using the geometrically exact beam theory and the updated variational asymptotic beam sectional (VABS) analysis which can cover the effect of initial twist and curvatures and calculate accurately the structural properties of the blade cross section with arbitrary shape and material distribution. The Peters finite state airloads theory and Peters-He finite state dynamic wake model are adopted to calculate the three-dimensional unsteady airloads. To ensure the calculation accuracy of the geometrically exact aeroelastic stability of the blades, the time domain method based on the finite element spatial discretization, Newmark numerical integration and Newton-Raphson methods to calculate the aeroelastic responses of blades and the moving-block analysis to extract the regressive lag mode damping from the blade transient responses are established. The accuracy of the proposed methods is verified by experimental results. The investigation results indicate that the transverse shear deformation and initial curvatures of the blades have significant effects on the aeroelastic stability of the hingeless composite rotors in hover.

• Record URL:
  • https://doi.org/10.1061/JAEEEZ.ASENG-5259
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08931321
• Supplemental Notes:
  • © 2023 The Authors.
• Authors:
  • Shang, Lina
  • Xia, Pinqi
• Publication Date: 2024-3

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Pagination: 04023113
• Serial:
  • Journal of Aerospace Engineering
  • Volume: 37
  • Issue Number: 2
  • Publisher: American Society of Civil Engineers
  • ISSN: 0893-1321
  • EISSN: 1943-5525
  • Serial URL: http://ascelibrary.org/journal/jaeeez

Subject/Index Terms

• TRT Terms: Aeroelasticity; Geometric distributions; Ground effect; Rotor blades; Stability analysis
• Subject Areas: Aviation; Design; Vehicles and Equipment;

Filing Info

• Accession Number: 01903198
• Record Type: Publication
• Files: TRIS, ASCE
• Created Date: Dec 22 2023 4:52PM