Master Degree / Yüksek Lisans Tezleri
Permanent URI for this collectionhttps://hdl.handle.net/11147/3008
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Master Thesis Vibration Analysis of a Plate With Piezoelectric Layers(Izmir Institute of Technology, 2018) Ağar Demir, Nuriye; Yardımoğlu, Bülent; Yardımoğlu, Bülent; 03.10. Department of Mechanical Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyIn this thesis, vibration analyses of a rectangular plate with piezoelectric layers are studied by using ANSYS. Computer codes for various cases related with the geometry of the piezoelectric layers are developed by using ANSYS Parametric Design Language (APDL) in ANSYS with SOLID5 and SOLID45 for piezoelectric patches and plate, respectively. The effect of the piezoelectric layer on active control of vibrations of plate is investigated.Master Thesis Effects of Stiffeners on Vibrations of Fiber-Reinforced and Laminated Composite Shells(Izmir Institute of Technology, 2018) Sarı, Tansel; Yardımoğlu, Bülent; Yardımoğlu, Bülent; 03.10. Department of Mechanical Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyVibration characteristics of fiber-reinforced and laminated composite paraboloidal shells with stiffeners are studied by Finite Element Method. The effects of stiffeners on natural frequencies are investigated by using a developed code in ANSYS. The developed code is verified by using several case studies on special cases of the present problem due to the lack of the present case in the reachable literature. Case studies are related with determination of natural frequencies of composite square plate, composite cylindrical shell, stiffened isotropic square plate, and isotropic paraboloidal shell of revolution. Aftervalidation of the developed computer code, effects on number of stiffener and cross-section of the stiffener on natural frequencies of fiber-reiforced and laminated composite paraboloidal shells are presented.Master Thesis Vibration Control of a Smart Curved Beam With Variable Curvature(Izmir Institute of Technology, 2017) Kavuncu, Ali Vâlâ; Yardımoğlu, Bülent; Yardımoğlu, Bülent; 03.10. Department of Mechanical Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyIn this study, vibration control of smart curved beam with variable curvature under in plane vibration is studied. The current problem is mathematically represented by differential eigenvalue problem with variable coefficients. Since the solution of these types of problem is based on the functions of the variable coefficients, Finite Element Method is used to reduce the differential eigenvalue problem to discrete eigenvalue problem. A computer code is developed in ANSYS to model the geometry and solve the vibration control problem by using APDL (ANSYS Parametric Design Language). Vibration control is performed by displacement feed-back algorithm. The effects of control parameters on time response are investigated.