随机风-浪联合传播数值模拟及分析

Numerical Simulation and Analysis of Random Wind-Wave Joint Propagation

海洋风、浪往往同时传播,同步传播过程中风、浪之间具有显著的相互耦合作用。针对海洋脉动风和随机波浪同步传播的数值仿真需求,基于程序开发平台MATLAB和计算流体动力学(computational fluid dynamics,CFD)软件平台Fluent,提出了一种随机风场和随机波浪联合传播数值模拟方法,基于该数值方法构建了随机风-浪联合传播数值水槽,并对该数值水槽单独随机风、单独随机波浪以及随机风-浪联合传播的数值模拟效果进行了试算和验证分析。结果显示该水槽数值模拟脉动风速与对应理论计算风速相吻合,水槽数值模拟随机波浪与对应理论计算随机波浪相吻合,水槽风-浪联合数值模拟显示了风、浪之间显著耦合作用效应。建立的随机风-浪联合数值水槽在随机风和随机波浪同步传播的数值仿真上具备可靠性及可应用性。研究内容为海上风、浪环境要素耦合效应研究及海洋工程结构风-浪联合作用相关研究提供了平台基础。

The simultaneous propagation of ocean winds and waves is accompanied by significant mutual coupling.In order to meet the numerical simulation requirements of the synchronized propagation of ocean random winds and random waves,a numerical simulation method for joint propagation of pulsating wind and random waves was proposed based on the programming development platform MATLAB and the computational fluid dynamics(CFD)software platform Fluent.Using this numerical method,a numerical wave flume for random wind-wave joint propagation was constructed,and the numerical simulation results of random wind,random waves,and random wind-wave joint propagation in the numerical wave flume were calculated and verified.The results show that the numerical simulation of pulsating wind speed matches well with the theoretical calculation of pulsating wind speed,as well as the numerical simulation of random waves matches well with the theoretical calculation of random waves.The established numerical wind-wave flume for random wind-wave joint propagation has reliability and applicability in the numerical simulation of synchronized propagation of random winds and random waves.The research provides a platform foundation for the study of the coupled effects of wind and waves on offshore wind and wave environment elements and the wind-wave joint action of marine engineering structures.