Yazar "Civalek, Omer" seçeneğine göre listele

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    Differential quadrature method for frequency analysis of membranes having irregular domains using an eight-node curvilinear element
    (TECHNO-PRESS, 2009) Ersoy, Hakan; Ozpolat, Lutfiye; Civalek, Omer; Ozturk, Baki
    [Abstract Not Available]
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    Discrete singular convolution algorithm for non-linear transient response of circular plates resting on Winkler-Pasternak elastic foundations with different types of dynamic loading
    (NATL INST SCIENCE COMMUNICATION, 2009) Civalek, Omer; Ozturk, Baki
    Nonlinear dynamic analysis of circular plates on two parameter elastic foundations is studied. Winkler and Pasternak models of elastic foundation are used. The nonlinear partial differential equations obtained from von Karman's large deflection plate theory have been solved by using the discrete singular convolution (DSC) in the space domain and the harmonic differential quadrature (HDQ) method in the time domain. The influence of stiffness of Winkler (K) and Pasternak (G) foundation on geometrically nonlinear dynamic response of plates is investigated. The influence of damping on the nonlinear dynamic response has also been studied. Numerical results obtained by the application of present technique compare well with the results available in literature.
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    Free vibration analysis of tapered beam-column with pinned ends embedded in Winkler-Pasternak elastic foundation
    (TECHNO-PRESS, 2010) Civalek, Omer; Ozturk, Baki
    The current study presents a mathematical model and numerical method for free vibration of tapered piles embedded in two-parameter elastic foundations. The method of Discrete Singular Convolution (DSC) is used for numerical simulation. Bernoulli-Euler beam theory is considered. Various numerical applications demonstrate the validity and applicability of the proposed method for free vibration analysis. The results prove that the proposed method is quite easy to implement, accurate and highly efficient for free vibration analysis of tapered beam-columns embedded in Winkler- Pasternak elastic foundations.
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    Vibration analysis of plates with curvilinear quadrilateral domains by discrete singular convolution method
    (TECHNO-PRESS, 2010) Civalek, Omer; Ozturk, Baki
    A methodology on application of the discrete singular convolution (DSC) technique to the free vibration analysis of thin plates with curvilinear quadrilateral platforms is developed. In the proposed approach, irregular physical domain is transformed into a rectangular domain by using geometric coordinate transformation. The DSC procedures are then applied to discretization of the transformed set of governing equations and boundary conditions. For demonstration of the accuracy and convergence of the method, some numerical examples are provided on plates with different geometry such as elliptic, trapezoidal having straight and parabolic sides, sectorial, annular sectorial, and plates with lour curved edges. The results obtained by the DSC method are compared with those obtained by other numerical and analytical methods. The method is suitable for the problem considered due to its generality, simplicity, and potential for further development.