随着船舶主尺度的增加，在进行船舶运动与波浪载荷分析时，为了考虑船体弹性变形与流体运动的相互作用，有必要采用水弹性分析方法。采用中国船舶科学研究中心开发的三维水弹性软件THAFTS对大型散货船的水弹性响应进行研究。首先，采用有限元方法分析了船体在真空中的固有频率和振型；然后基于模态叠加原理，计算了船体在波浪中的运动和水弹性响应，并讨论了航速对波浪载荷的影响；最后探讨了波激振动对船体结构疲劳损伤的影响，所得结论对于大型船舶的结构设计具有重要的参考价值。
With the dramatic increase of ship size, in the prediction of seakeeping and wave loads of ships, it is necessary to use hydroelastic analysis method to take the fluid and structure interaction into account. In the present paper, THAFTS (Three-dimensional Hydroelastic Analysis of Floating and Translating Structure) software, developed by China Ship Scientific Research Center, was utilized to study the hydroelastic response of a large bulk carrier. At first, the natural frequency and dry mode of the hull in vacuum was analyzed based on FEA method. Then the motions and hydroelastic responses of the ship in the waves were calculated using modal summation theory. The influences of forward speed effects on wave loads were also discussed. Finally, the effects of springing on the fatigue damage of the ship structure were investigated and the conclusions drawn from the results are of great reference value in the structural design of large ships.
2018,40(12): 37-43,48 收稿日期：2018-01-31
DOI：10.3404/j.issn.1672-7649.2018.12.008
分类号：U661.1
基金项目：国家自然科学青年基金资助项目（51709242）；工信部高技术船舶科研项目资助项目（工信部联装[2016]22）
作者简介：田超(1978-),男,博士,研究员,研究方向为船舶水弹性力学
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