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Dynamic response of articulated towers under correlated wind and waves

机译：铰接塔在相关风浪作用下的动力响应

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This paper deals with the dynamic behavior of a double-hinged articulated tower to wave alone, and correlated wind and waves. The analysis includes the nonlinearities due to nonlinear drag force, fluctuating buoyancy, variable added mass and instantaneous tower orientation. The fluctuating wind load is modeled by Ochi and Shin spectrum, while the wave load is characterized by Pierson-Moskowitz (P-M) spectrum. The nonlinear dynamic equation of motion is derived by Hamilton's principle. The equations of motion are solved in time domain by using Wilson-theta method. Power spectral density function (PSDF) of surge, tilting motion, hinge shear and bending moment are presented under high, moderate and low sea states. Studies of correlated wind and waves are found to be imperative for double hinged articulated towers to serve and survive in the extreme ocean environment. The response PSDF highlights the wind induced dynamic responses of the tower.
机译：本文讨论了双铰链铰接式塔架单独振动时的动力特性，并将风和波浪关联起来。分析包括由于非线性拖曳力，波动浮力，可变附加质量和瞬时塔方位引起的非线性。波动的风荷载由Ochi和Shin光谱建模，而波荷载则由Pierson-Moskowitz（P-M）光谱表征。运动的非线性动力学方程是根据汉密尔顿原理得出的。使用Wilson-theta方法在时域中求解运动方程。在高，中，低海状态下，给出了喘振，倾斜运动，铰链剪切和弯矩的功率谱密度函数（PSDF）。对于双铰链铰接式塔架在极端海洋环境中服务和生存，必须研究相关的风浪关系。 PSDF的响应突出显示了风引起的塔架动态响应。

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