WIT Press


Vibroacoustic Loads On Spacecraft Antennae: Analysis And Test Correlations

Price

Free (open access)

Paper DOI

10.2495/AC030251

Volume

69

Pages

10

Published

2003

Size

518.31 kb

Author(s)

J. Santiago-Prowald, G. Rodrigues & J.L. Riobóo-Estripot

Abstract

Vibroacoustic loads on spacecraft antennae: analysis and test correlations J. antia ago-~rowald', G. Rodriguesl & J.L. Riobcio-~stri~ot~ 1 Structures Section, ESA-ESTEC, The Netherlands 2 EADS CASA Espacio, Spain Abstract The acoustic load during launch is one of the dimensioning cases of spacecraft structures, especially demanding for large antenna reflectors. Current specifications rely on the diffuse field idealisation, while tests are actually performed in reverberating chambers, leading to discrepancies between predicted and measured responses. Most of these are due to the limited capabilities of analytical tools for industrial applications and the testing facilities, particularly when dealing with the modelling or control of the acoustic inputs. However, as shown in this paper, some sources of correlation errors are inappropriate signal processing methods, that do not take into account the physical nature of the loads and the fluid-structure coupling. In particular, digital filtering tech

Keywords