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On linear modeling of interface damping in vibrating structures
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Structural and vibroacoustics.ORCID iD: 0000-0003-1855-5437
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
2012 (English)In: Journal of Sound and Vibration, ISSN 0022-460X, E-ISSN 1095-8568, Vol. 331, no 19, 4299-4312 p.Article in journal (Refereed) Published
Abstract [en]

Dissipation of mechanical vibration energy at contact interfaces in a structure, commonly referred to as interface damping, is an important source of vibration damping in built-up structures and its modeling is the focus of the present study. The approach taken uses interface forces which are linearly dependent on the relative vibration displacements at the contact interfaces. The main objective is to demonstrate a straightforward technique for simulation of interface damping in built-up structures using FE modeling and simple, distributed, damping forces localized to interfaces where the damping occurs. As an illustration of the resulting damping the dissipated power is used for evaluation purposes. This is calculated from surface integrals over the contact interfaces and allows for explicit assessment of the effect of simulated interface forces for different cases and frequencies. The resulting loss factor at resonance is explicitly evaluated and, using linear simulations, it is demonstrated that high damping levels may arise even though the displacement differences between contacting surfaces at damped interfaces may be very small.

Place, publisher, year, edition, pages
2012. Vol. 331, no 19, 4299-4312 p.
Keyword [en]
As interfaces, At resonance, Built-up structures, Contact interface, Contacting surfaces, Damping forces, Dissipated power, FE modeling, High damping, Interface damping, Interface forces, Linear modeling, Linear simulation, Loss factor, Straightforward techniques, Surface integrals, Vibrating structures, Vibration-damping
National Category
Applied Mechanics
URN: urn:nbn:se:kth:diva-101734DOI: 10.1016/j.jsv.2012.03.036ISI: 000306884200007ScopusID: 2-s2.0-84862223447OAI: diva2:549056
TrenOp, Transport Research Environment with Novel Perspectives

QC 20120903. QC 20160212

Available from: 2012-09-03 Created: 2012-09-03 Last updated: 2016-02-12Bibliographically approved

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