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Mode based prediction of vibrations in highly damped structures
Dovstam Innovat.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Numerical acoustics.ORCID iD: 0000-0003-1855-5437
2006 (English)In: Proceedings of ISMA2006: International Conference on Noise and Vibration Engineering, 2006, 1029-1038 p.Conference paper, Published paper (Refereed)
Abstract [en]

Traditionally, mode based techniques are used for prediction of sound and vibrations. This is motivated by the possibility of using reduced modal models instead of very detailed FE models. For highly damped, composite structures the effect of reduced model size on the accuracy of predicted sound and vibration levels is often not known. Problems connected with application of modal methods towards highly damped materials, systems and multilayer treatments using conventional modal vibration theory have recently been highlighted by the authors. In the present paper a simple, damped Oberst beam example is presented, not hitherto satisfactorily treated by modal techniques. It is pointed out that the contact forces at internal interfaces between different materials have to be treated in order for a modal solution to be found. It is also shown that non-physical tractions at free unloaded boundary surfaces have to be eliminated.

Place, publisher, year, edition, pages
2006. 1029-1038 p.
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-82479ISI: 000246669501036Scopus ID: 2-s2.0-84897085544OAI: oai:DiVA.org:kth-82479DiVA: diva2:498275
Conference
International Conference on Noise and Vibration Engineering (ISMA2006), Louvain, BELGIUM, SEP 18-20, 2006
Note
QC 20120308Available from: 2012-02-11 Created: 2012-02-11 Last updated: 2012-03-08Bibliographically approved

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Göransson, Peter

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