船舶撞击靠船墩结构的瞬态动力分析

Transient dynamic analysis of dolphin structure under ship collision

为了解靠船墩结构在船舶撞击作用下的动力响应,以江苏某船闸靠船墩结构为例,采用大型有限元分析软件ABAQUS中的Explicit模块,建立了船舶、靠船墩及地基土的三维有限元模型,对船舶撞击靠船墩过程进行瞬态动力分析,得到了高、低水位两种不同工况下撞击力的时程曲线和靠船墩的应力位移等结果。研究结果表明,在两种水位工况条件下,船舶撞击靠船墩时最大压应力均位于船舶与靠船墩接触面上,在靠船墩底板及墩身背水面均产生拉应力,且底板前齿的拉应力较大;在低水位工况下,靠船墩应力大于高水位工况,靠船墩受力更为不利。

Based on the dolphin structure of the ship lock in Jiangsu,the finite analysis software ABAQUS integral algorithm was used to establish the 3Dfinite element model of ship,dolphin and foundation,the process of collision was simulated to obtain the impact forcetime curve and the stress and strain of the dolphin in two different working conditions of high and low water level.The results show that the maximum compressive stress is on the contact surface,the tensile stress is both in dolphin floor and back surface of the dolphin,and the maximum tensile stress is in the front teeth of dolphin floor.The stress of the dolphin in low water level is greater and the dolphin is more dangerous.