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本文采用数值模拟方法,研究载重量50000t、航速4m/s散货船在撞击某跨海公路大桥主桥墩柔性防撞装置的动力学行为,获得了船与桥墩的撞击力时程曲线,讨论了柔性防撞对桥墩的防护机理。计算结果表明:在没有防撞装置条件下,桥墩受到的船舶撞击力超过了桥墩抗撞的设计极限,将造成桥毁船沉的恶性安全事故;而在有柔性防撞装置保护下,桥墩受到的船舶撞击力大幅降低,并远低于设计允许的桥墩横向抗撞力,同时船舶受到的撞击力也大幅降低,这表明该柔性防撞装置在保护桥墩的同时,也能够起到保护船舶的目的。
In this paper, the numerical simulation method is used to study the dynamic behavior of a bulk cargo ship with a payload of 50000t and a speed of 4m / s at the impact of a flexible collision avoidance device of a bridge pier on a sea-crossing highway bridge. The impact time history of the ship and bridge piers is obtained. Protective Mechanism of Flexible Anti - collision to Bridge Pier. The calculation results show that under the condition of no collision avoidance device, the impact force of the ship subjected to the pier exceeds the design limit of the pier crash, which will cause the serious safety accident of sinking the ship. Under the protection of the flexible anti-collision device, Of the ship’s impact force is greatly reduced and far below the design allows the lateral pier crashworthiness, while the ship suffered a substantial reduction in impact force, indicating that the flexible crashworthy device in the protection of piers, but also can protect the purpose of the ship .