VIBRATION CHARACTERISTICS OF PERIODIC SANDWICH BEAMS

Document Type : Original Article

Authors

1 Egyptian Air-force, Cairo, Egypt.

2 Mechanical Engineering Department, British University in Egypt, Cairo, Egypt.

3 Aerospace Engineering Department, Cairo University, Cairo, Egypt.

Abstract

ABSTRACT
Periodic Structures have been in the focus of research for their useful characteristics
and ability to attenuate vibration in frequency bands called “stop-bands”. In the previous
studies, periodic changes in the geometry of beams were introduced to create the
periodicity; then the vibration characteristics were studied accordingly. In this study, for
the first time, we are analyzing the vibration characteristics of a sandwich beam with the
periodic change in the sandwich material. The new technique preserves the external
geometry of the beam structure and depends on changing the material of the sandwich
material. The periodic analysis and the vibration response characteristics of the model
are investigated using finite element model for a sandwich beam. The response to
bending excitation has shown promising results for periodic sandwich beams, that may
encourage further study of the problem with more practical configurations.

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