系泊船舶动力学特性的计算机仿真研究

以三阶操纵运动方程为基础，引入定常的风力、潮流作用力和二阶波浪力，建立了系泊系统三自由度的运动微分方程。在此数学模型的基础上．建立了系泊系统的多自由度的计算机仿真模型。在潮流作用、潮流和风作用以及风浪流联合作用等三种情形下，对系泊船舶的动力学响应分别进行了仿真研究。研究表明，系泊系统的动力学行为具有强烈的非线性特征。对于单点系泊船舶而言，在定常的风浪流作用下．顶风顶浪顶流状态并不一定是最为危险的工况。

Computer Simulation Research on the Dynamic Characteristics of Moored Vessels

Introducing uniform tidal current forces, wind forces and steady second order wave forces, motion mathematical model of three degree-of-freedom (3-DOF) of mooring systems is established based on a nonlinear three order vessel maneuvering mathematical model, which includes the surge, sway and yaw motions of the moored vessels. Computer simulation models of 3-DOF motions of mooring systems are built using the motion mathematical model. Time domain simulations are carried out with three ships exposed to current, a tanker exposed to current and wind and a tanker exposed to wind, waves, and current, respectively. It is found that there are strong nonlinear characteristics in motion responses of moored ships. It is also shown that the case in which the moored vessels are exposed to head wind, waves and current is perhaps not the most dangerous for single point mooring vessels.