A Projection and Condensation Method for Aerospace Noise and Vibration Engineering

A condensation method based on the U-vectors from Singular Value Decomposition is applied on aeroacoustics and structural dynamics data. The aim of the condensation is to make the process of cabin noise levels estimates and noise control design more efficient. The suggested method is allowing a reductions of the number of load cases used for vibro-acoustic analyses, and hence significantly reduces the time and efforts for vibration predictions and subsequent cabin noise estimates. Application of the method is made to aeroacoustic predictions for a Contra-Rotating Open Rotor propulsion system, and for structural response data for an aircraft test section available at AIRBUS GmbH, Hamburg, Germany.