Vibration and dynamic stability of a traveling sandwich beam
| Autor: | Ching-Cheng Wang, Wen-Pei Yang, Lien-Wen Chen |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Acoustics and Ultrasonics
business.industry Mechanical Engineering Stiffness Natural frequency Mechanics Structural engineering Condensed Matter Physics Instability Viscoelasticity Finite element method Vibration Mechanics of Materials Compressibility medicine medicine.symptom business Excitation Mathematics |
| Zdroj: | Journal of Sound and Vibration. 285:597-614 |
| ISSN: | 0022-460X |
| DOI: | 10.1016/j.jsv.2004.08.018 |
| Popis: | The vibration and dynamic stability of a traveling sandwich beam are studied using the finite element method. The damping layer is assumed to be linear viscoelastic and almost incompressible. The extensional and shear moduli of the viscoelastic material are characterized by complex quantities. Complex-eigenvalue problems are solved by the state-space method, and the natural frequencies and modal loss factors of the composite beam are extracted. The effects of stiffness and thickness ratio of the viscoelastic and constrained layers on natural frequencies and modal loss factors are reported. Tension fluctuations are the dominant source of excitation in a traveling sandwich material, and the regions of dynamic instability are determined by modified Bolotin's method. Numerical results show that the constrained damping layer stabilizes the traveling sandwich beam. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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