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논문 기본 정보

자료유형
학술저널
저자정보
Pan, Danguang (Department of Civil Engineering, University of Science and Technology Beijing) Chen, Genda (Department of Civil, Architectural, and Environmental Engineering, Missouri University of Science and Technology) Lou, Menglin (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University)
저널정보
테크노프레스 Structural engineering and mechanics : An international journal Structural engineering and mechanics : An international journal 제40권 제5호
발행연도
2011.1
수록면
689 - 703 (15page)

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A new perturbation method is introduced to study the undamped free vibration of a non-prismatic Timoshenko beam for its natural frequencies and vibration modes. For simplicity, the natural modes of vibration of its corresponding prismatic Euler-Bernoulli beam with the same length and boundary conditions are used as Ritz base functions with necessary modifications to account for shear strain in the Timoshenko beam. The new method can transform two coupled partial differential equations governing the transverse vibration of the non-prismatic Timoshenko beam into a set of nonlinear algebraic equations. It significantly simplifies the solution process and is applicable to non-prismatic beams with various boundary conditions. Three examples indicated that the new method is more accurate than the previous perturbation methods. It successfully takes into account the effect of shear deformation of Timoshenko beams particularly at the free end of cantilever structures.

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