考虑风浪流的TLP张力腿张力响应规律分析

摘要

文章研究了张力腿平台在风浪流中的张力腿的张力变化规律.推导了微分方程中的质量矩阵、耦合刚度矩阵、阻尼矩阵和运动坐标系下张力腿平台波浪外荷载.采用微元法对立柱和浮筒进行离散,运用龙格—库塔法对张力腿平台耦合运动微分方程进行了数值求解.对不同海况下和不同浪向角下张力腿平台张力腿张力变化进行了能量谱分析,并在上海交通大学海洋工程国家重点试验室中通过缩尺比为1∶40的模型对数值模拟的结果进行了试验验证.比较了考虑风和流以及不考虑风和流的结果.%The regularity of tendon tension of tension leg platform (TLP) for random waves is investigated.Mass matrix,coupling stiffness matrix and damping matrix in the vibration differential equation and external load of TLP in moving coordinating system are inferred.Infinitesimal method is applied to divide columns and pontoons into small parts.Time domain motion equation is solved by Runge-Kutta integration scheme.The tendon tension in different sea conditions and different wave approach angles is analyzed by Power Spectral Density (PSD).The result is verified by 1:40 scaling factor model test in State Key Laboratory of Ocean Engineering of Shanghai Jiao Tong University.The results of considering and ignoring wind and current are compared.