Within the context of a vibro-acoustic test program to study cabin noise reduction technology in a twin-engine turboprop commuter aircraft, results of a modal analysis are presented. A single input frequency response function method is used to perform the analysis in a ATR-42 aircraft. The test program includes three different measurement configurations for a total of 182 pick-ups, different frequency ranges of analysis up to 500 Hz, with and without a 5 PSI pressurization. The principal modes related either to the global structure or to its parts (frame, stringer and skin-panel) are identified.
Analisi Modale Sperimentale di UN Tronco di Fusoliera di UN Velivolo Turboprop (Experimental Modal Analysis of a Partial Full-Scale Fuselage of Turboprop Aircraft)
1983
17 pages
Report
Keine Angabe
Englisch