The horizontal and vertical motions of a nonlinear spherical buoy, excited by synthetic ocean waves within a wave flume, is numerically and experimentally investigated. First, fluid motion in the wave tank is described using Airy's theory, and the forces on the buoy are determined using a modified form of Morison's equation. The system is then studied statically in order to determine the effects of varying system parameters. Numerical simulations then use the governing equations to compare predicted motions with experimentally observed behavior. Additionally, a commonly used linear formulation is shown to be insufficient in predicting buoy motion, while the nonlinear formulation presented is shown to be accurate.
Two-Dimensional Nonlinear Analysis of an Untethered Spherical Buoy Due to Wave Loading
Contributed by the Design Engineering Division of ASME for publication in the Journal of Computational and Nonlinear Dynamics. Manuscript received September 22, 2011; final manuscript received June 23, 2013; published online July 29, 2013. Assoc. Editor: Hiroshi Yabuno.
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Ballard, Z., and Mann, B. P. (July 29, 2013). "Two-Dimensional Nonlinear Analysis of an Untethered Spherical Buoy Due to Wave Loading." ASME. J. Comput. Nonlinear Dynam. October 2013; 8(4): 041019. https://doi.org/10.1115/1.4024887
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