Abstract
The river-to-sea ship structure tends to be flat due to limited draft of river channels. Its weakened vertical stiffness may cause slamming and wave induced vibrations. In this paper, in order to investigate the vertical bending moment (VBM) in this kind of ship, a segmented elastic model test was carried out. For comparison, numerical simulations based on three dimension (3D) potential theory and 3D hydroelastic theory were performed. And rule-based results were also given. Results indicate that, wave induced vibrations, springing and whipping would contribute more than 50% to the composed VBM in this ship. Considering effects of hydroelasticity, long term forecast of VBM based on 3D potential theory are larger than rule-based results.
Keywords:
vibration,
high frequency vbm,
ship,
simulation,
nonlinear,
forecast,
wide-flat ship,
transfer function,
test result,
time history
Subjects:
Information Management and Systems
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2015. International Society of Offshore and Polar Engineers
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