VIBRATION CHARACTERISTICS OF PERIODIC SANDWICH BEAMS | ||||
| The International Conference on Applied Mechanics and Mechanical Engineering | ||||
| Article 18, Volume 13, 13th International Conference on Applied Mechanics and Mechanical Engineering., May 2008, Page 34-48 PDF (265.68 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/amme.2008.38995 | ||||
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| Authors | ||||
| BADRAN H.1; TAWFIK M.2; NEGM H.3 | ||||
| 1Egyptian Air-force, Cairo, Egypt. | ||||
| 2Mechanical Engineering Department, British University in Egypt, Cairo, Egypt. | ||||
| 3Aerospace 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. | ||||
| Keywords | ||||
| Vibration; Sandwich beam; Finite Element; Periodic core; Stop bands; Kinetic energy; Strain energy; Hamilton’s principle and Transfer matrix | ||||
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