TY - JOUR
T1 - Experimental investigation of vibration localization in disordered multi-span beams
AU - Bouzit, D.
AU - Pierre, C.
PY - 1995/11/9
Y1 - 1995/11/9
N2 - 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.
AB - 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.
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U2 - 10.1006/jsvi.1995.0550
DO - 10.1006/jsvi.1995.0550
M3 - Article
AN - SCOPUS:0029640453
SN - 0022-460X
VL - 187
SP - 649
EP - 669
JO - Journal of Sound and Vibration
JF - Journal of Sound and Vibration
IS - 4
ER -