Research On Modeling And Visualization Of Navigable Environment And Mountain Rivers

Based on the rapid development of inland waterways and the complicated terrain and hydrological conditions of mountainous areas,some inland waterways become more and more crowded.When the ship is sailing on the natural channel of mountain area,the force is unbalanced,the resistance and the difficulty of operation increase.At the same time,the shallow water effect and the shore wall effect have bad influence on ships sailing in mountainous rivers,all of which lead to the navigation safety facing more challenges.In this paper.According to the typical mountain river and its shore buildings and the landforms on the shore,a three-dimensional vision is made,the visualization of the ship movement and the visualization of the ship maneuvering motion are carried out,based on the plane two-dimensional flow mathematical model,taking the shallow water effect and the shore wall effect into consideration,Therefore,do relevant research of the Ship manoeuvring numerical simulation,simulation and visualization about mountain rivers.The main conclusions are as follows.Firstly,by analyzing the three-dimensional softs of Auto CAD Civil 3D,3d Max Design,Arcgis,and osgearth and making use of their advantages,a three-dimensional model of mountainous rivers was established,and the visualization of a two-dimensional flow field isometric surface provides environmental basis of the modeling and visualization research of mountain river navigable environments.Secondly,in this paper,combining a three-dimensional river model with a two-dimensional flow mathematical model,a mathematical model of ship maneuvering is established,which provides accurate two-dimensional flow field related information for the study of ships in actual mountain waterway maneuvers.meanwhile,considing the shallow water effect and the shore wall effect.It can be applied to real-time simulation of ship manoeuvring movements in mountainous rivers,which provides effective maneuvering parameters for ship manoeuvring motions and offers professional data for the mathematical model of professional ship maneuvers.Thirdly,based on the mathematical model of ship maneuvering in shallow waters,combined with ship navigation simulation and visualization in the mountain channel environment,the Fortran language was used to compile the calculation program considering the shallow water effect,and the ship manoeuvring motionsimulation platform was built.Based on the river section of mann-proc in the lancang river,In the case of the two-dimensional flow field and surrounding environment under the flow of Q= 1635m3/s in the beach section,Considering the effects of shallow or deep water conditions,analyse ship motion relevant datas,study the influence of shallow water effect on ship maneuvering in the three dimensional environment of mountainous rivers.Lastly,based on the river environment modeling and visualization of two-dimensional flow field,the influences of shallow water and shore wall effect on ship navigation are taken into consideration.Simulation of ship maneuvering motion is carried out with Fortran language considering shore wall effect.analyse ship motion relevant datas,study the influence of shore wall effect on ship navigation in the mountainous rivers.