Nonlinear numerical simulation for wave-current interaction with floating elastic plate over variable depth sea-bottom

Yong Chenga1, Chunyan JI1, Gangjun Zhai2

Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (12) : 112-121.

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PDF(2044 KB)
Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (12) : 112-121.

Nonlinear numerical simulation for wave-current interaction with floating elastic plate over variable depth sea-bottom

  • Yong Chenga1, Chunyan JI1, Gangjun Zhai2
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Abstract

Hydroelastic analysis of wave-current nonlinear interaction with floating elastic plate is a complex task, especially when water waves propagate along the uneven sea-bottom. Therefore, the fully nonlinear analysis techniques are widely recognized as the unique approach to predict the accurate hydroelastic responses. A 2D (two-dimensional) time domain fully nonlinear numerical tank using higher-order boundary element method is devoted to solve such a problem. The fourth-order Runge-Kutta time stepping integration scheme with the Mixed Eulerian-Lagrangian approach is applied to update the instantaneous free and plate surface. An Euler-Bernoulli-von karman nonlinear beam model is introduced to determine the fluid pressure imposed on the fluid-structure interface. In order to obtain derivatives of plate surface, the plate displacement is interpolated using a series of modal functions, and the modal amplitudes are solved by applying the Galerkin scheme. The numerical solutions are validated against existing meshless numerical results. Further calculations are then conducted to examine the effects of currents and the uneven topography on the displacement nonlinearity of the plate. Finally, the higher harmonic displacements are investigated with the various current velocities.

Key words

 floating elastic plate / higher-order boundary element method / time domain fully nonlinear / hydroelastic responses / wave-current interaction / uneven sea-bottom

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Yong Chenga1, Chunyan JI1, Gangjun Zhai2. Nonlinear numerical simulation for wave-current interaction with floating elastic plate over variable depth sea-bottom[J]. Journal of Vibration and Shock, 2017, 36(12): 112-121

References

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