Damping Modelling in Complex Built-up Structures
(English)In: Journal of Sound and Vibration, ISSN 0022-460X, E-ISSN 1095-8568Article in journal (Other academic) Submitted
Damping in a given structure can be characterized and attributed to mechanisms like internal material dissipation and non material damping. While material damping is well understood and rather straightforward to model, the losses occurring at interfaces are less accessible and representable in simulations of realistic built-up body structures. Here, an approach based on linear modelling is discussed. The main objective of the work is to investigate the modelling of interface damping in a spot-welded structure by numerical simulations. Damping due to surface contact and movement of air through unsealed gaps is included. The results are promising in terms of the losses predicted for a realistic structure.
Interface damping, Surface contact damping, Structural damping, Air damping, Air pumping, Loss factor, Built-up structures, Finite element modelling.
Other Mechanical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-93779OAI: oai:DiVA.org:kth-93779DiVA: diva2:523828
QS 20122012-04-262012-04-262012-04-26Bibliographically approved