关键词: 船舶工程, 船桥碰撞, 能量转换, 撞击力, 影响因素

Abstract: With the rapid development of transportation industry, ship routes become more and more dense, the number of river-crossing and sea-crossing bridges increases year by year, and the probability of ship-bridge collision accidents increases. The collision process of 6600DWT vertical bow cargo ship and square pier collision was simulated by using nonlinear finite element method. The energy conversion relationship of ship-bridge collision was studied; the variation rule of dynamic responses of ship structures, such as ship speed, bow depth, ship stress and strain, changing with time was analyzed. Five factors, including ship speed, load, collision angle, lateral offset and pier section type, were selected to set up multiple working conditions. The effects of each factor on the impact force and contact time of ship-bridge collision were studied respectively. The research results show that: the ship-bridge collision accident may cause obvious plastic deformation in the contact area; the impact force is positively correlated with the speed and load of the ship, but negatively correlated with the collision angle and lateral offset, and it has a certain correlation with the cross-section form of the pier. The research results reproduce the whole process of ship-bridge collision and reveal the locality of ship-bridge collision damage and the difference of impact force under the influence of various factors.

Key words: ship engineering, ship-bridge collision, energy conversion, impact force, influencing factor