Internal fuselage noise: comparison of computations and tests on a Falcon airframe |
| |
Authors: | Laurent Guillaumie Jean-Michel David Olivier Voisin-Grall |
| |
Affiliation: | ONERA, 29 avenue de la Division Leclerc, 92322 Châtillon cedex, France |
| |
Abstract: | An unequipped Falcon 2000 airframe, a complex heterogeneous structure reduced to the fuselage alone, was subjected to vibro-acoustic characterization within the framework of a cooperative effort by Aerospatiale, Dassault-Aviation, and Onera. Onera's Structural Dynamics and Coupled Systems Department measured the structure's vibro-acoustic responses for four mechanical excitation configurations, and analysed three structural configurations: fuselage alone without floor, with floor, and with floor and internal wall. The resulting database of vibratory and acoustic level measurements is used for validating numerical models in the low- and medium-frequency range, as well as statistical energy analysis (SEA) models in the medium- and high-frequency range.The database was analysed by Dassault-Aviation and Onera. We present here the computation/test comparisons and the limitations of the methods in use. All of the data and comparisons validate the predictive vibro-acoustic response models and methods for a Falcon fuselage subjected to a mechanical excitation. |
| |
Keywords: | vibro-acoustic characterization statistical energy analysiscaracté risation vibro-acoustique analyse statistique é nergé tique |
本文献已被 ScienceDirect 等数据库收录! |
|