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Structural Engineering and Mechanics Volume 54, Number 3, May10 2015 , pages 419-432 DOI: https://doi.org/10.12989/sem.2015.54.3.419 |
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AMDM for free vibration analysis of rotating tapered beams |
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Qibo Mao
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| Abstract | ||
| The free vibration of rotating Euler-Bernoulli beams with the thickness and/or width of the cross-section vary linearly along the length is investigated by using the Adomian modified decomposition method (AMDM). Based on the AMDM, the governing differential equation for the rotating tapered beam becomes a recursive algebraic equation. By using the boundary condition equations, the dimensionless natural frequencies and the closed form series solution of the corresponding mode shapes can be easily obtained simultaneously. The computed results for different taper ratios as well as different offset length and rotational speeds are presented in several tables and figures. The accuracy is assured from the convergence and comparison with the previous published results. It is shown that the AMDM provides an accurate and straightforward method of free vibration analysis of rotating tapered beams. | ||
| Key Words | ||
| adomian modified decomposition method; rotating tapered beam; taper ratio; natural frequency; mode shape | ||
| Address | ||
| Qibo Mao: School of Aircraft Engineering, Nanchang HangKong University, 696 South Fenghe Avenue, Nanchang, CN-330063, P.R. China | ||