Research on key parameters and performance of new fabricated steel-UHPC anti-ship collision device

The integral assembly connection of the independent floating tank with 18 inner lining frame type energy dissipating elements was taken as the energy dissipating device against ship collision. LS-DYNA was used to establish the refined finite element model of ship bridge collision system. Through the performance optimization analysis of the key parameters such as the material type of energy dissipation elements, the wall thickness of the pontoon, the reinforcement ratio of the pontoon and so on, the change rules of the impact force of the pier, the deformation energy of the ship and the energy of the pier with different parameters were obtained. The results show that the anti-collision performance is better than that of high-strength aluminum alloy and UHPC composite when using low-carbon steel energy dissipation components. The anti-collision performanceof the device with 120 mm wall thickness is better than that of the device with 150 mm and 90 mm wall thickness, and the anti-collision performance of the device with 5% reinforcement ratio is better than that of the device with 4%, 6% and 7% reinforcement ratio. Based on the calculation results, the optimal parameters of steel UHPC ship collision prevention device are obtained. When the speed is 1, 3 and 5 m/s, the ship deformation energy is reduced by 89.6%, 64.0% and 51.3% respectively, and the maximum collision force of ship bridge is reduced by 15.2%, 36.4% and 41.8% respectively, which can effectively protect the ship and pier. © 2021, Central South University Press. All right reserved.