نوع مقاله : مکانیک جامدات
نویسندگان
1 دانشجوی دکتری، دانشکده مهندسی مکانیک، دانشگاه تبریز، تبریز، ایران
2 دانشیار، دانشکده مهندسی مکانیک،دانشگاه افسری امام علی، تهران، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In this research, the free vibrations of a sandwich beam with a viscoelastic core and carbon nanotube-reinforced polymer face sheets, under simply supported boundary conditions and using the three-layer sandwich beam theory, have been investigated. Given the fundamental application of sandwich structures with viscoelastic cores in critical industries such as military and aerospace, they are of significant importance for vibration reduction and noise control. The Kelvin-Voigt model has been used to model the viscoelastic core, and using the aforementioned theory and Hamilton's principle, the governing equations of the sandwich structure are derived. The obtained equations are in the form of partial differential equations, and to solve these equations of motion, the analytical Navier method in the spatial domain has been employed. To ensure the validity and accuracy of the numerical results, a comparative approach with reputable published articles has been presented. Finally, the effects of various material and geometric parameters on the natural frequency of the system have been examined. The results indicate that as the structural loss factor increases, the damping of the sandwich beam also increases, consequently reducing the natural frequency of the system.
کلیدواژهها [English]
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