关键词: 船舶, 桥区河段, 运动模型, 仿真

Abstract: After the construction of Three Gorges Reservoir，river-crossing bridges in construction at the reservoir area become more and more. In order to reduce or avoid the ship-bridge collision，the mathematic model of ship’s off-course influenced by the wind and stream in bridge navigable waters is established，from the perspectives of ship driving and collision avoiding. Zhongxian Yangtze River Bridge located in Shi-Zhong highway is taken as the research object and the ship controlling theory is used in this model. And the ship motion track in the bridge navigable waters is simulated by the simulation technology，which shows three-dimensional view of ship getting through the bridge. The proposed mathematic model provides theoretic basis for river-crossing bridges in Three Gorges Reservoir area to take the initiative measures to prevent collision.

Key words: ship, bridge navigable waters, motion model, simulation