Research On The Ship’s Forces And Mooring Forces Under Wind Load

In recent years,due to the impact of strong winds in the port,ship safety accidents have occurred frequently.It has become the focus of every country’s attention to prevent the ship safety accidents caused by sudden strong wind.At the same time,the establishment of marine meteorological forecast and early warning system has become the focus of all countries.Using ship simulation model to calculate wind load is the key link of this research.The accuracy of simulation calculation will directly affect the accuracy of ship condition forecast in the wind field.In order to study the wind load of port ships,this paper selects Panamax bulk carrier,which is widely used in the world,to analyze the ship’s force and mooring force.In this paper,CFD method is used to simulate the wind load model of the ship.Firstly,the ship model is built by Solid Works,then the wind load model is built by ANSYS fluent,and the calculation domain is divided into hexahedral meshes.According to the conditions and factors of software numerical simulation,the mathematical model and boundary conditions are established.In this paper,the Realizable k-ε turbulence model is used to simulate the state of full and no-load ships in different wind stages and wind directions.Finally,the wind load coefficient data is obtained in a targeted manner to observe the wind field around the ship.In this paper,APDL is used to simulate the ship mooring model.Firstly,the ship mooring model is established by using the parametric method,and the selected fluctuating wind speed spectrum is transformed into the wind speed time history curve.Then,the parametric design method is used to simulate the response of the ship’s cables to the fluctuating wind.At last,Finally,the cable is sampled at different positions to extract the time history curve and deformation time curve of the sampling unit.Through the analysis of the results,the wind load coefficient obtained by the simulation is consistent with the calculated value of the theoretical formula.Combined with the response results of the cable to the fluctuating wind,it can help to establish a professional and reliable marine meteorological forecast and early warning system.