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Study on Nonlinear Characteristics of Freak-Wave Forces with Different Wave Steepness |
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| Authors: | Deng Yan-fei Tian Xin-liang Li Xin |
| Institution: | 1.State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China ;2.CIMC Offshore Co. Ltd., Shenzhen, 518000, China ; |
| Abstract: | The nonlinear wave forces on vertical cylinders induced by freak wave trains were experimentally investigated. A series of freak wave trains with different wave steepness were modeled in a wave flume. The corresponding wave forces on vertical cylinders of different diameters were measured. The experimental wave forces were also compared with the predicted results based on Morison formula. Particular attentions were paid to the effects of wave steepness on the dimensionless peak forces, asymmetry characteristics of the impact forces and high-frequency force components. Wavelet-based analysis methods were employed in revealing the local energy structures and quadratic phase coupling in the freak wave forces. |
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