Master Degree / Yüksek Lisans Tezleri

Permanent URI for this collectionhttps://hdl.handle.net/11147/3008

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2016 - 20174

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Author: search.filters.author.Yardımoğlu, BülentSubject: search.filters.subject.Curved beams

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Now showing 1 - 4 of 4
  • Master Thesis
    Vibration Control of a Smart Curved Beam With Variable Curvature
    (Izmir Institute of Technology, 2017) Kavuncu, Ali Vâlâ; Yardımoğlu, Bülent
    In 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.
  • Master Thesis
    Dynamic Analysis of Non-Circular Curved Beam Subjected To Moving Loads
    (Izmir Institute of Technology, 2017) Emre, Melih; Yardımoğlu, Bülent
    In this thesis, analysis of the dynamic responses of non-circular curved beams subjected to moving loads is studied by using ANSYS which is Finite Element software. An APDL (ANSYS Parametric Design Language) code is developed for a parabolic curved beams having fixed-fixed boundary conditions. The moving load is acted on the curved beam as a single load with constant speed during the movement of the load. First of all, the proper number of finite element used in the developed APDL code for curved beam is determined by convergence test. In order to verify the mass and stiffness matrices of the curved beam, natural frequencies are found and compared with the results available in the literature. Then, moving load algorithm used in the developed APDL code is validated by using a straight beam model which has exact solution. After validations, static deflections of curved beam under slowly moving load and dynamic deflections under moving load are presented. Finally, discussion of numerical results are given.
  • Master Thesis
    Out-Of Plane Displacements of Curved Beams With Variable Curvature
    (Izmir Institute of Technology, 2016) Uyar, Ahmet Serhend; Yardımoğlu, Bülent
    The differential equations of out-of-plane displacements of curved beams with variable curvature have variable coefficients. Selection of the solution method is based on the curvature function of the curved beam. In this study, Differential Quadrature Method (DQM) and Finite Element Method (FEM) are used to find the out-of-plane displacements of curved beams with variable radius of curvature. Since the parabola is very famous and known curve, it is selected as the form of curved beam. To test and validate the computer codes developed based on DQM in Matlab and based on FEM by APDL (ANSYS Parametric Design Language) in ANSYS, some typical examples are considered. As first step, convergence studies are performed to determine the number of sampling points in DQM and number of elements in FEM. After having information about aforementioned modeling parameters, comparisons between DQM and FEM results are given. The effects of variable curvature parameter of the curved beam on out-of-plane displacements are obtained. The practical application of the present model is discussed.
  • Master Thesis
    In Plane Vibrations of Curved Timoshenko Beams With Variable Curvature
    (Izmir Institute of Technology, 2016) Cin, Uğur; Yardımoğlu, Bülent
    In this study, in-plane vibrations of curved Timoshenko beams with variable curvature is studied by Finite Element Method. In the selected method, it is known that generalized differential eigenvalue problem are solved by reducing the equations from continuous to discrete domain. Catenary form is used as the axis of curved beam. An APDL (ANSYS Parametric Design Language) code is developed for the geometric and finite element models of the curved beam. The computer code is validated by the data available in the literature. After validation of developed computer code, the effects of parameters, which are related to shape of the curved beam, on the natural frequencies and mode shapes are studied.