波流作用下导管架码头结构浮运模拟数学模型及验证

提出了一种导管架浮运稳定性数学模型．模型中，将导管架看作刚体，主要考虑波流荷载及拖缆对导管架的作用；依据刚体运动学相关理论，建立了导管架运动方程；波浪水流荷载用莫里森公式计算，控制方程采用4阶龙格一库塔方法进行求解．模拟了导管架浮运过程中波浪作用下6个自由度的位移响应和拖缆力，与水槽试验得到的拖缆力实测结果进行了对比，二者符合较好．对不同波浪入射角度和水流流向条件下导管架拖航情况进行了数值模拟，发现逆向入射30。浪的拖缆力最大，大于正逆向浪的情况．分析了缆绳与拖航方向的平衡角随横纵向流速比的变化趋势，得出比值越大，拖缆与航向的平衡角越大的结论．

Numerical Model and Its Validation for Floating Simulation of Jacket-Type Wharf Under Waves and Currents

A mathematical model is proposed for the simulation of floating jacket. In the model, the jacket is consid- ered as a rigid body, and waves, currents and the towing line are the main loads. The governing equations are estab- lished for the movement of the jacket based on the rigid body dynamics, in which the wave and current loads are esti- mated by Morison theory. The governing equations are solved by the 4th order Runge-Kutta method. The displace- ments in 6 degrees of freedom and the tension of the mooring rope are simulated. The calculated tension of the line is compared with the result measured in a wave flume, which shows good agreement. The results of displacement in the towing process under waves and currents are analyzed according to the results of numerical calculation, and it is found that the tension of the line reaches its largest value if wave incident angle is around inverse 30~, which is greater than that in the case of normally inverse-incident wave. The variation of the balance angle between towing direction and towing line with the ratio of the current velocity in the traverse direction to that in the longitudinal direction is ana- lyzed, and it is found that the bigger the ratio, the bigger the angle is.