In order to characterize the lift-off acoustic environment of launch vehicles, EADS has developed an inverse method via a time domain boundary integral equation approach using an optimal control method. An industrial application of the method is presented via the identification of acoustic sources of ARIANE 5 from lift-off in-flight measurements. As the lift-off acoustic field is random in nature, the optimization process is performed using the cross-correlation functions matrix measurement. After having characterized the sources from pressure measurements, the complete environment is rebuilt by an acoustic direct computation from the obtained acoustic sources. We finally estimate the loads created by the acoustic field by integrating the resulting pressures over all surfaces of the launchers.
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April 2011
Research Papers
A Time Domain Inverse Method for Identification of Random Acoustic Sources at Launch Vehicle Lift-Off
B. Troclet,
B. Troclet
Department of Missile Structural Analysis,
EADS ASTRIUM Space Transportation
, 78133 Les Mureaux, France
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S. Alestra,
S. Alestra
Department of Simulation Information Technology Systems Engineering,
EADS Innovation Works
, 92152 Suresnes, France
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V. Srithammavanh,
V. Srithammavanh
Department of Simulation Information Technology Systems Engineering,
EADS Innovation Works
, 92152 Suresnes, France
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I. Terrasse
I. Terrasse
Department of Simulation Information Technology Systems Engineering,
EADS Innovation Works
, 92152 Suresnes, France
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B. Troclet
Department of Missile Structural Analysis,
EADS ASTRIUM Space Transportation
, 78133 Les Mureaux, France
S. Alestra
Department of Simulation Information Technology Systems Engineering,
EADS Innovation Works
, 92152 Suresnes, France
V. Srithammavanh
Department of Simulation Information Technology Systems Engineering,
EADS Innovation Works
, 92152 Suresnes, France
I. Terrasse
Department of Simulation Information Technology Systems Engineering,
EADS Innovation Works
, 92152 Suresnes, FranceJ. Vib. Acoust. Apr 2011, 133(2): 021010 (11 pages)
Published Online: March 22, 2011
Article history
Received:
November 2, 2008
Revised:
June 11, 2010
Online:
March 22, 2011
Published:
March 22, 2011
Citation
Troclet, B., Alestra, S., Srithammavanh, V., and Terrasse, I. (March 22, 2011). "A Time Domain Inverse Method for Identification of Random Acoustic Sources at Launch Vehicle Lift-Off." ASME. J. Vib. Acoust. April 2011; 133(2): 021010. https://doi.org/10.1115/1.4002124
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