Akademik Veri Yönetim Sistemi
Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji, cilt.13, sa.1, ss.330-340, 2025 (TRDizin)
Thanks to the perfect combination of mechanical properties such as high strength and rigidity, along with functional properties like thermo-acoustic insulation and vibration damping, foam structures are becoming increasingly attractive in engineering applications. While most research has focused on the mechanical properties of foams. On the other hand, understanding the vibration behavior of foams is vital since most failures in engineering applications are associated with violent vibrations. This research focused on the vibration analysis of foams with different types and configurations. In the context of vibration, modal analysis is a highly preferred method for fully understanding the structural behavior of materials. The Finite Element Method is commonly employed for numerical modal analysis to reveal the vibration characteristics of structures, including natural frequencies and corresponding mode shapes. With this objective, the natural frequencies and mode shapes of hybrid foams have been revealed under both clampedfree and free-free boundary conditions. The effects of material application and boundary conditions were investigated. The changes in the stiffness of the structure, occurring under different vibration modes of the system and depending on the volume fraction, have also been investigated. Since closed-cell aluminum foam and EPS-filled syntactic foam have different mechanical properties, the changes in the structural stiffness of the material are revealed as the volume fraction changes. For the second and third modes, there was no significant change in structural stiffness in the volume ratio ranges of 0-0.2 and 30-1000, while a decrease in structural stiffness was observed in the volume ratio range of 0.2 to 30. The findings and results obtained can provide valuable information to researchers and engineers for optimum design conditions.