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Title:
METHOD FOR PREDICTING THE DYNAMIC BEHAVIOUR OF AN AIRCRAFT STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2010/000958
Kind Code:
A3
Abstract:
The invention relates to a method for predicting the dynamic behaviour of an aircraft structure, said aircraft comprising at least one rotary device including at least one rotor (11) guided in rotation by at least one fixed-bracket bearing (17, 18) containing a shock-absorbing fluid film (24), wherein said method comprises using a global digital model of the aircraft structure including a basic digital model of each rotary device, generating a non-linear digital model of each shock-absorbing film (preferably by developing a cavitation-free model and a model with cavitation), integrating the model of each shock-absorbing film with the global model, applying interference to at least one rotor of a rotary device, calculating the vibration frequency of at least one rotor of each rotary device and the corresponding frequency of the vibrations generated in a critical portion of the aircraft structure.

Inventors:
SKELLY JOHN (FR)
VO HOANG THIEN PHU (FR)
Application Number:
PCT/FR2009/000643
Publication Date:
March 03, 2011
Filing Date:
June 03, 2009
Export Citation:
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Assignee:
AIRBUS OPERATIONS SAS (FR)
SKELLY JOHN (FR)
VO HOANG THIEN PHU (FR)
International Classes:
F16C27/04; G01H1/00
Foreign References:
US20040245388A12004-12-09
US5201585A1993-04-13
GB2218751A1989-11-22
Other References:
ASSIS RODRIGUES F.: "Étude de la Dynamique Non Linéaire d'Amortisseurs du Type Squeeze Film", February 2003, ÉCOLE CENTRALE DE LYON, Lyon, XP007916086
BONNEAU O., FRÊNE J.: "Non-linear behavior of a flexible shaft partly supported by a squeeze film damper", WEAR, vol. 206, 1997, pages 244 - 250, XP002612547
ANONYME: "Méthodes Avancées en Ingénierie Mécanique", 8 October 2003 (2003-10-08), pages 1 - 16, XP002612623, Retrieved from the Internet [retrieved on 20101203]
Attorney, Agent or Firm:
SANTARELLI (BP. 388, LABEGE Cedex, FR)
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