Study On Test Design Of New Type GFRP Ship-proof Crashing Tank

With the accelerated pace of economic development in China,the transportation industry has been developing rapidly.A large number of high technology,high investment and long-span cross river and cross sea bridges have been put into use or being built.China has become the largest country in the world.At the same time,the number of ships navigable and the carrying capacity of ships are increasing with the development of shipping.So that the probability of ship bridge collision is increased gradually.The collapse of a bridge caused by the collision of a large ship will cause huge casualties and economic losses.In the field of the research on ship bridge collision device,China has been greatly developed in recent years.On the basis of a large number of data and based on the situation of a bridge,a floating box for basic research is designed to carry out a basic research on floating box structure.The slope angle of the floating box wall,the number of energy dissipation buckets in the side box of floating box,the number of energy dissipation buckets in the front box of the floating box,the bucket diameter of the floating box energy dissipation bucket and the thickness of the floating box energy dissipation bucket are compared and analyzed.Firstly,Hypermesh is used for pre-processing.Secondly,LS-DYNA is used for numerical simulation analysis.The differences of these different cases of floating boxes are analyzed.The following analysis is carried out from the energy,the force,the impact force of the pier.The energy of the system,the energy of floating box and the energy of ship are analyzed.The maximum equivalent stress of ship bow,the maximum principal stress of floating box,ylindrical shell and the third principal stress minimum value are analyzed.Finally,the energy consumption under different conditions is compared,and the following conclusions are drawn:(1)The inclination angle of the floating box shell has little effect on the energy consumption.(2)When the ship's side collision is not considered and the material of the floating box is not calculated,the number of energy dissipation tanks in the side box of floating box has little effect on the energy consumption of the floating box.(3)The number of energy dissipation buckets in the first box of the front box has great influence on the energy consumption of the floating box.As the number of rows increases,the energy consumption of the floating box is increasing.But increasing to a certain number,the increase of energy consumption is not obvious.(4)The outer barrel diameter of the energy dissipation bucket affects the energy consumption of the floating box.After comparing the five barrel diameters of 0.8m,1m,1.6m,2m and 2.4m,it is found that the energy dissipation bucket with 1.6m barrel diameter has the best energy dissipation effect.(5)When the outer bucket diameter of the energy dissipation bucket is determined as 1.6m,the barrel thickness of 6mm is the best energy consumption for cylindrical shell with 1.6m barrel diameter.(6)According to the above conclusion,the inclined angle of the ten thousand ton tank shell is 45 degrees,the number of exhaust barrel in the front box is 12,the barrel diameter of the energy dissipation bucket is 1.6m,and the thickness of the cylinder shell is 6mm.When the ten thousand ton ship hits the floating box with no bias angle at the speed of 4m/s,the impact of the ship is 11.7MN and the energy consumption is 50.8%.