With the advancement of the water transportation industry,instances of ships colliding with miter gates occur repeatedly.In order to investigate the extent of damage inflicted on gates when ships under various operational conditions navigate through ship locks,we use ANSYS/LS-DYNA software to build a finite element model encompassing a miter gate and a 5 000-ton class ship,and analyze gate damage in terms of impact depth and stress distribution.Then we vary various parameters such as impact velocity,angle,ship tonnage,and gate thickness to conduct comprehensive collision simulations,and analyze the influence of different factors.The results show that during the collision process,the ship undergoes three distinct stages:contact,compression,and detachment.The ship’s kinetic energy is transformed into the deformation energy of the gate,primarily resulting in plastic deformation at the impact site and excitation phenomena.An increase in impact speed,angle,and ship tonnage leads to a significant rise in impact force,whereas miter gate thickness exhibits a nearly linear reduction in impact force.The finite element model presented herein accurately replicates real-world collision scenarios.