随机波作用下半潜式超大型海上浮式基地时域动力响应简化计算方法

发布时间：2018-05-21 18:24

本文选题：半潜式超大型浮式结构 + 移动式海上基地　；参考：《海洋通报》2017年02期

【摘要】：基于半潜式超大型浮式结构"刚性模块-柔性连接构件"计算模型,以其中典型的移动式海上基地(Mobile Offshore Base,MOB)作为对象,研究该结构时域动力响应的简化计算方法。经理论推导得到D'Alembert动力学平衡方程中MOB运动的各水动力系数矩阵、波浪激励力矩阵及连接构件约束力矩阵内各系数的简易计算公式。以"三模块模型"MOB为例,探讨其在6级海况浪向角在0°~90°变化时,各模块的动力响应位移随时间的变化规律,并统计其最大值与文献资料中的实测结果进行对比。经研究表明:运用本文理论模型和简化算法的数值计算结果与文献中的实测数据能够相互吻合,可验证本算法的正确性、可行性与合理性,研究成果可为半潜式超大型浮式结构动力响应分析提供一定的理论支撑。
[Abstract]:Based on the calculation model of "rigid module-flexible connection member" of semi-submersible super-large floating structure, a simplified method for calculating the time-domain dynamic response of the structure is studied, in which the typical mobile Offshore base MOB is used as an object. Based on the theoretical derivation of the hydrodynamic coefficient matrix of the MOB motion, the wave excitation matrix and the simple formulas of the coefficients in the binding matrix of the connecting members in the D'Alembert dynamic equilibrium equation, the formulas are obtained. Taking the "three-module model" MOB as an example, the dynamic response displacement of each module is discussed when the wave angle of the 6-level sea condition changes at 0 掳~ 90 掳, and the maximum value is compared with the measured data in the literature. The research shows that the numerical results of the theoretical model and the simplified algorithm are consistent with the measured data in the literature, and the correctness, feasibility and rationality of the algorithm can be verified. The research results can provide some theoretical support for the dynamic response analysis of semi-submersible super-large floating structures.
【作者单位】：天津大学水利工程仿真与安全国家重点实验室高新船舶与深海开发装备协同创新中心;重庆交通大学河海学院;
【基金】：国家自然科学基金(51679166);国家自然科学基金创新研究群体科学基金(51321065) 交通运输部交通建设科技项目(2014326224040)
【分类号】：P751

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