Experimental investigation of vibration localization in disordered multi-span beams

D. Bouzit, C. Pierre

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

The results of an experimental investigation of the effects of span length disorder on the dynamics of mono-coupled, multi-span beam are reported. Two experimental specimen are considered: a nominally periodic 12-span beam with equal spacing between simple supports, and the corresponding disordered beam which features randomly spaced supports. Experimental results demonstrate that the transmission of vibration which takes place within the frequency passbands of the periodic beam is greatly hindered when span length randomness is introduced. The spatial localization of both the mode shapes and the steady state harmonic response to an end excitation is observed in the disordered 12-span beam, especially for frequencies which lie within the second passband. Very good quantitative agreement is obtained between experimental results and theoretical findings for both ordered and disordered configurations. Furthermore, an experimental estimation of the localization factor yields satisfactory agreement with the theoretical result for an infinite multi-span beam. This work reports one of the first systematic experiments carried out to demonstrate the occurrence of vibration localization in nearly periodic structures.

Original languageEnglish
Pages (from-to)649-669
Number of pages21
JournalJournal of Sound and Vibration
Volume187
Issue number4
DOIs
StatePublished - 9 Nov 1995

Fingerprint

Dive into the research topics of 'Experimental investigation of vibration localization in disordered multi-span beams'. Together they form a unique fingerprint.

Cite this