The finite element method is employed in this paper to investigate free-vibration problems of a spinning stepped Timoshenko beam consisting of a series of uniform segments. Each uniform segment is considered a substructure which may be modeled using beam finite elements of uniform cross section. Assembly of global equation of motion of the entire beam is achieved using Lagrange’s multiplier method. The natural frequencies and mode shapes are subsequently reduced with the help of linear transformations to a standard eigenvalue problem for which a set of natural frequencies and mode shapes may be easily obtained. Numerical results for an overhung stepped beam consisting of three uniform segments are obtained and presented as an illustrative example. [S00021-8936(01)00101-5]
Free Vibration of a Spinning Stepped Timoshenko Beam
Contributed by the Applied Mechanics Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF APPLIED MECHANICS. Manuscript received and accepted by the ASME Applied Mechanics Division, Sept. 1, 1999; final revision, Apr. 10, 2000. Associate Technical Editor: N. C. Perkins.
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Yu , S. D., and Cleghorn , W. L. (April 10, 2000). "Free Vibration of a Spinning Stepped Timoshenko Beam ." ASME. J. Appl. Mech. December 2000; 67(4): 839–841. https://doi.org/10.1115/1.1331282
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