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| Study on Wave Loads Characteristic of Pentamaran and the Influence of Sponsons’ Layout |
| WEN Jun-Hua, CHEN Zhen |
| (School of Naval Architecture ,Ocean and Civil Engineering, Shanghai Jiaotong University,Shanghai 200240, China) |
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Abstract Based on the threedimensional potential theory, the waveinduced loads response RAO of the pentamaran, including the vertical shear force, vertical bending moment and torsion moment at the main hull and the crossstructure sections, was studied. The dangerous sections were derived by the analyses of the distribution of the RAO’s maximum value and the influence of the wave direction. Considering the nonlinear factors, the time history of the wave loads at the dangerous sections with respect to different sponsons’ layouts in irregular wave was calculated, then the significant values of the wave loads amplitude were compared to analyze the influence of the sponsons’ layouts on the wave loads at the dangerous sections, and the optimal arrangement of the sponsons was achieved. Meanwhile, the wave loads were compared with Trimaran. The results demonstrate that the wave loads both on the main hull and crossstructure are smaller when the after sponsons lying at aft quarter length, while the transverse location of the sponsons and the vertical location of the front sopnsons mainly affect the wave loads on the crossstructure, and the existence of the front sponsons can efficiently decrease the wave loads on the crossstructure of the after sponsons.
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Received: 16 August 2011
Published: 31 August 2012
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