深吃水半潜式平台参数共振研究

发布时间：2018-04-02 07:18

本文选题：深吃水半潜式平台　切入点：参数共振　出处：《海洋工程》2016年01期

【摘要】：深吃水半潜式平台(deep draft semi-submersible,DDS)作为一种新型海洋结构物,既继承了传统半潜式平台的优点,又改善了传统半潜式平台垂荡运动性能差的不足。但随着吃水的增加,DDS纵摇运动参数共振也成为一个不容忽视的问题。当DDS纵摇运动固有周期和垂荡运动周期满足一定关系时,纵摇运动将发生参数共振,纵摇角度将会显著增大。研究推导了DDS纵摇运动方程,并简化为标准的马修方程,运用希尔无穷行列式法求解马修方程,得到了含阻尼的马修稳定性图谱,并结合具体算例讨论了不同参数对DDS纵摇运动参数共振问题的影响。研究表明:深吃水半潜式平台的参数共振,是设计人员在设计之初必须考虑的问题;通过合理选取平台的系统参数,可以有效避免纵摇运动参数共振现象的发生。
[Abstract]:As a new type of ocean structure, deep draught semi-submersible platform (DDS) inherits the advantages of traditional semi-submersible platform. But with the increase of draught, the resonance of pitching motion parameters is also a problem that can not be ignored. When the inherent period of DDS pitching motion and the period of sagging motion satisfy a certain relationship, The pitching motion will have parametric resonance and the pitch angle will increase significantly. The DDS pitching motion equation is deduced and simplified to the standard Mathieu equation. The Hill infinite determinant method is used to solve the Mathieu equation. The stability diagram of DDS with damping is obtained, and the influence of different parameters on the resonance of DDS pitching motion parameters is discussed. The results show that the parametric resonance of deep draught semi-submersible platform is obtained. It is a problem that designers must consider at the beginning of design, and the resonance phenomenon of pitching motion parameters can be effectively avoided by reasonably selecting the system parameters of the platform.
【作者单位】：上海交通大学船舶海洋与建筑工程学院海洋工程国家重点实验室;
【基金】：国家自然科学重点基金资助项目(50739004) 国家自然科学基金资助项目(51379005)
【分类号】：P751

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