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Stochastic response of an axially loaded composite Timoshenko beam exhibiting bending–torsion coupling

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Abstract

A spectral finite element method is proposed to investigate the stochastic response of an axially loaded composite Timoshenko beam with solid or thin-walled closed section exhibiting bending–torsion materially coupling under the stochastic excitations with stationary and ergodic properties. The effects of axial force, shear deformation (SD) and rotary inertia (RI) as well as bending–torsion coupling are considered in the present study. First, the damped general governing differential equations of motion of an axially loaded composite Timoshenko beam are derived. Then, the spectral finite element formulation is developed in the frequency domain using the dynamic shape functions based on the exact solutions of the governing equations in undamped free vibration, which is used to compute the mean square displacement response of axially loaded composite Timoshenko beams. Finally, the proposed method is illustrated by its application to a specific example to investigate the effects of bending–torsion coupling, axial force, SD and RI on the stochastic response of the composite beam.

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Authors and Affiliations

  1. Key Laboratory of High Performance Ship Technology of Ministry of Education, School of Transportation, Wuhan University of Technology, Wuhan, China

    Li Jun, Shi Chaoxing, Kong Xiangshao, Li Xiaobin & Wu Weiguo

Authors
  1. Li Jun
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  2. Shi Chaoxing
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  3. Kong Xiangshao
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  4. Li Xiaobin
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  5. Wu Weiguo
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Correspondence to Li Jun.

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Jun, L., Chaoxing, S., Xiangshao, K. et al. Stochastic response of an axially loaded composite Timoshenko beam exhibiting bending–torsion coupling. Arch Appl Mech 84, 109–122 (2014). https://doi.org/10.1007/s00419-013-0787-9

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  • DOI: https://doi.org/10.1007/s00419-013-0787-9

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