Research On The Relationship Of Distance Of Bridge And The Span Of The Bridge In The Bridge Group River

With the demand of convenient traffic and the spread of the city, the bridge group are build more and more .However, some bridges are build in the near distance, it is fall short of the standard criterion ,it will harm to the security of the bridge and the construction or maintenance of sea route. The test using the numerical simulation of river and ship movement to research the circs of navigation in the field of bridged river, At the same time, researching the relationship of the distance of bridge group and the span of bridge, it will provide a scientific direction to the actual project. The primary content and conclusion of the text as follows:The test utilizes the N-S equation、continuous stream equation and the turbulence model of RNG k ?εto simulate the movement of the river. Adopting the method of finite volume to scatter, using the method of simple to calculate the equation, using the model of VOF to simulate the freedom surface of river. Moreover, employ the metrical data to validate the precision of this numerical simulation. Using the separated thinking of Japanese MMG equation and the separated hull、oar、rudder to couple the movement of ship. Adopt the method of Runge-Kutta to calculate the equation. Through the computer language Matlab to realize the planar numerical simulation of navigation, and use the involution and Z test to validate the precision of this numerical simulation. The ship simulation software realizes the emulator of ship movement, and it has a good vision. It can clearly to see the change of ship track、rudder angle、excursion angle、speed of the ship with time.At the same time, the test combines the numerical simulation of river and ship movement, analyses the angle of view、deep length of bridge holes、the change of flow field and the manipulator mentality to study the character of navigation in the bridge river. Ulteriorly analyzing the influence of the distance of bridge group and the span of bridge in the bend river that is based on analyzing the relationship of the distance of bridge group and the span of bridge in the straight river, and then, gained a experiential formula to count the relationship of the distance of bridge group and the span of bridge.