Structural power as an acoustic design criterion for the early phase of product design

摘要

The vibroacoustic assessment and optimization of vehicle components at the early stage of complete vehicle development is an essential. This is because only at the early phase it is possible to change concepts. Therefore, it is necessary to focus on analysis methods which can work with a limited set of information in contrast to the high-fidelity methods. Hence a representative and robust physical structural key performance indicator is needed as sound pressure levels at the passenger ears are not available at the early stage of the design process. A performance comparison of accelerations, forces and powers is performed within this work. A numerical model where the transfer functions form the excitation, over to the structural component, then over to the sound pressure level is available forms the basis for the presented study. The applicability of different structural key performance acoustic indicators (e.g. accelerations, forces and powers) for this model is discussed. We will present the significance of each indicator for the conceptual design phase.