A2.3 - Psychoacoustic cabin noise assessment under parameter uncertainties and stochastic loads

Motivation

The application of wave-resolving vibroacoustic models for passenger cabin noise predictions during early design stages allows assessing new technology and aircraft configurations as aimed within SE²A and holds a high potential for the investigation of sound reduction measures. The further development of these wave-resolving approaches is therefore an important step in closing the design loop with regard to acoustics and potentially enabling an iterative design in the future. A major challenge is an extension of deterministic vibroacoustic models to account for a) stochastic sources (e.g. from aeroacoustics) and b) uncertain design parameters. Especially the last point often challenges an early application of wave-resolving models as the interior sound pressure level is significantly influenced by certain design parameters, which are only known much later in the design process. Moreover, incorporating uncertainties into the model predictions is crucial for model validation and comparison of simulations and experiments.