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Modelling the vibration of sandwich beams using frequency dependent parameters
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
2007 (English)In: Journal of Sound and Vibration, ISSN 0022-460X, E-ISSN 1095-8568, Vol. 300, no 3-5, 589-611 p.Article in journal (Refereed) Published
Abstract [en]

Various types of sandwich beams with foam or honeycomb cores are currently used in the industry, indicating the need for simple methods describing the dynamics of these complex structures. By implementing frequency-dependent parameters, the vibration of sandwich composite beams can be approximated using simple fourth-order beam theory. A higher-order sandwich beam model is utilized in order to obtain estimates of the frequency-dependent bending stiffness and shear modulus of the equivalent Bernoulli-Euler and Timoshenko models. The resulting predicted eigenfrequencies and transfer accellerance functions are compared to the data obtained from the higher-order model and from measurements.

Place, publisher, year, edition, pages
2007. Vol. 300, no 3-5, 589-611 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-5942DOI: 10.1016/j.jsv.2006.07.048ISI: 000243561200010Scopus ID: 2-s2.0-33846007399OAI: oai:DiVA.org:kth-5942DiVA: diva2:10482
Note
QC 20100630Available from: 2006-06-02 Created: 2006-06-02 Last updated: 2017-12-14Bibliographically approved
In thesis
1. Vibration of sandwich beams
Open this publication in new window or tab >>Vibration of sandwich beams
2006 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

Some aspects and properties of the lateral vibration of sandwich beams are investigated, including the concept of apparent bending stiffness and shear modulus, allowing the sandwich beam dynamics to be approximately described by classical beam theory. A sixth order beam model is derived including boundary conditions, and the free and forced response of some beam configurations analyzed. The possibility of computing material parameters from measured eigenfrequencies, i. e. inverse analysis, is considered. The higher order model is also utilized for investigation of the energy propagation through sandwich composite beams and the transmission over different junctions.

Place, publisher, year, edition, pages
Stockholm: KTH, 2006
Series
Trita-AVE, ISSN 1651-7660
National Category
Fluid Mechanics and Acoustics
Identifiers
urn:nbn:se:kth:diva-4030 (URN)91-7178-395-4 (ISBN)
Public defence
2006-06-15, E2, Lindstedtsvägen 3, KTH, Stockholm, 14:00
Opponent
Supervisors
Note
QC 20100630Available from: 2006-06-02 Created: 2006-06-02 Last updated: 2010-06-30Bibliographically approved

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