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True damping and frequency prediction for aeroelastic systems: The PP method

Haddadpour, H ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jfluidstructs.2009.06.006
  3. Publisher: 2009
  4. Abstract:
  5. This paper presents a numerical scheme for stability analysis of the aeroelastic systems in the Laplace domain. The proposed technique, which is called the PP method, is proposed for when the aerodynamic model is represented in the Laplace domain and includes complicated transcendental expressions in terms of the Laplace variable. This method utilizes a matrix iterative procedure to find the eigenvalues of the system and generalizes the other methods such as the P and PK methods for prediction of the flutter conditions. The major advantage of this technique over the other approximate methods is true prediction of subcritical damping and frequency values of the aeroelastic modes. To examine the present technique for stability analysis, some typical examples are used which illustrate its applicability and advantages. © 2009 Elsevier Ltd. All rights reserved
  6. Keywords:
  7. Aeroelastic stability ; Iterative procedure ; Laplace domain ; Aerodynamic models ; Aeroelastic modes ; Aeroelastic stability ; Aeroelastic system ; Approximate methods ; Eigenvalues ; Frequency prediction ; Iterative procedure ; Iterative procedures ; Laplace domain ; Laplace domains ; matrix ; Numerical scheme ; Stability analysis ; Convergence of numerical methods ; Damping ; Eigenvalues and eigenfunctions ; Laplace transforms ; Pumping plants ; System stability
  8. Source: Journal of Fluids and Structures ; Volume 25, Issue 7 , 2009 , Pages 1177-1188 ; 08899746 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S088997460900070X