Sensitivity Analysis in Vehicle NVH Involving Trim Parts (online)

* Presenting author
Day / Time: 23.03.2022, 09:00-09:20
Room: 47-02
Typ: Regulärer Vortrag
Online-access: Bitte loggen Sie sich ein, damit weitere Inhalte sichtbar werden (bspw. der Zugang zur Onlinesitzung).

In the automotive industry the acoustic comfort is key in vehicle development. With the electrification of the vehicle fleets the frequency of interest is growing, reaching 10 kHz or more. Thus the sensitivity and variability of results are increasing. This variability is a risk for production if not evaluated in early stage. If uncertainties are not considered, certain vehicles might not meet the defined targets during production.The impact of the vehicle trims on the interior noise is increasing with the frequency. Especially when porous materials are involved, the sensitivity and variability of those parts need to be evaluated. Besides of the behavior due the material properties, mass and boundary conditions have an impact on the results. While masses are mainly well controlled, boundary conditions are uncertain when it comes to trim attachments (clips or snaps), or zone of contact between trim and the vehicle structure. This article proposes a method that evaluates the sensitivity of acoustic trims on interior noise and structure vibrations due to different sources of uncertainties on an industrial model. Considered uncertainties are due to material data, attachments, mass distribution and contact zones of trims with the structure.