双层底船舶搁浅损伤数值仿真研究

Numerical Simulation Research on Grounding Damage of Double Bottom Ship

文中采用ABAQUS建立了楔形体切割板架的仿真模型,将仿真结果与实验结果进行对比,验证了数值仿真模型的可靠性.在此基础上,开展了双层底船舶搁浅的结构损伤数值模拟研究,分析了船底结构的搁浅损伤、搁浅力,以及能量吸收特性,并研究了礁石形状对船舶搁浅性能的影响.结果表明:纵桁及外底板是主要的抗搁浅损伤构件;相比于锥形礁石,底部半径相同的球形礁石和台形礁石对船底内底板造成的损伤程度较小,对其他船底构件损伤程度较大;且船底在球形礁石和台形礁石下的搁浅宽度较大、搁浅长度较短.

ABAQUS was used to establish the simulation model of wedge-shaped cutting plate frame, and the reliability of the numerical simulation model was verified by comparing the simulation results with the experimental results. On this basis, the numerical simulation of structural damage of double-bottom ship grounding was carried out. The grounding damage, grounding force and energy absorption characteristics of ship bottom structure were analyzed, and the influence of reef shape on ship grounding performance was studied. The results show that the longitudinal truss and the outer floor are the main anti-grounding components. Compared with the conical reef, the spherical reef and the platform reef with the same bottom radius cause less damage to the bottom plate of the ship and more damage to other bottom components. Moreover, the grounding width and length of ship bottom under spherical reef and platform reef are larger and shorter.