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Vibroacoustic ground test campaign on DLRs ISTAR aircraft

The campaign was part of a joint research effort of DLR and Dassault Aviation within the CleanSky2 project AIRFRAME. It was conducted in cooperation with colleagues of the Institute for Composite Structures and Adaptive Systems and supported by DLR’s Flight Experiments Department.

The goal for the campaign was twofold: Getting high-resolution information about the aircraft’s vibro-acoustic behavior in order to later update numerical models for vibration and noise prediction in the mid-frequency range and to analyze the structure-born noise injected by running engines into the fuselage structure. The measurements evaluated the vibration response to both, shaker and engine, excitations at about 1300 positions acquired by a rowing grid of accelerometer sensors. The data was complemented by acoustic measurements taken by our colleagues from within the cabin. 

Literature

• Winter, Rene and Sinske, Julian and Norambuena, Marco and Zettel, Sebastian Florens (2022) High-resolution vibroacoustic measurement and analysis of the DLR ISTAR aircraft to assess engine-induced cabin noise. INTER-NOISE 2022, 21.-24. Aug. 2022, Glasgow, UK. ISBN 978-1-906913-42-7.