Study on impact force calculation formula of ship lock gravity dolphin

Abstract

Ship impact force is one of the main loads of the ship lock hydraulic structures. In order to understand its main influence factors and reasonably determine the calculation method, the transient dynamic analysis method is used in this paper to study the dynamic response of the dolphin under the ship - dolphin collision. Taking the dolphin of a ship lock in Jiangsu province as an example,the 3D finite element model of the ship, the dolphin and the foundation soil was established by the explicit module of ABAQUS to simulate the transient process of the ship's impact under different conditions,and the change law of impact force under different working conditions was obtained. The results are as follows: A linear relation between the impact force and ship impact velocity was founded. Under the condition of a certain impact velocity, the greater the ship's displacement, the greater the impact force, and the impact force and displacement 5 . 0 M was approximately linear. A approximate sine curve relationship between impact force and impact angle was founded. Considering the three factors that the ship's displacement, impact velocity and impact angle, the calculation formula of the impact force θ