Method for predicting the dynamic behavior of an aircraft structure

A method for predicting dynamic behavior of an aircraft structure, the aircraft including at least one rotary device including at least one rotor guided in rotation by at least one fixed-bracket bearing containing a shock-absorbing fluid film. The method includes using a global digital model of the...

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Bibliographische Detailangaben
Hauptverfasser:	SKELLY JOHN, VO HOANG THIEN PHU
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGUE COMPUTERS BEARINGS BLASTING CALCULATING COMPUTING COUNTING ELEMENTS OR CRANKSHAFT MECHANISMS ENGINE PLANTS IN GENERAL ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES MEASURING MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES PHYSICS ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS STEAM ENGINES TESTING THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A method for predicting dynamic behavior of an aircraft structure, the aircraft including at least one rotary device including at least one rotor guided in rotation by at least one fixed-bracket bearing containing a shock-absorbing fluid film. The method includes 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 (for example 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, and 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.