船舶护舷结构抗碰撞动态模拟

Dynamic simulation of ship fender structure anti-collision

    摘要
  • 摘要:
      目的  旨在研究船舶靠泊时“船体−护舷−码头”的动态耦合作用。
      方法  采用非线性有限元方法，建立舷侧与护舷结构有限元模型，模拟船舶靠泊过程中速度、应力、能量的动态演化过程。
      结果  结果表明：护舷与码头接触最紧密时，船舶速度降为零，护舷结构动态变形和相互作用力最大；船舶靠泊时，护舷呈现出较强的吸能能力，约占船舶初始总动能的70%，船体结构得到很好的保护。
      结论  进一步分析表明：随着初始靠泊速度的提高，护舷效能呈降低趋势；所研究目标船的极限靠泊速度为2.5 kn，推荐安全靠泊速度为2.0 kn，研究结果可为船舶靠泊速度限制和船体结构吸能设计提供参考。

     

    Abstract:
      Objectives   This study aims to investigate the dynamic coupling effect of "hull-fender-dock" during ship berthing.
      Methods  Using the nonlinear finite element method, a port side and fender structure finite element model is established to simulate the dynamic evolution of speed, stress and energy during ship berthing.
      Results  The results show that when the fender makes contact with the dock, the ship's speed decreases to zero and the dynamic deformation and interaction force of the fender structure are at their maximum. When the ship is berthing, the fender shows strong energy absorption capacity, accounting for about 70% of the initial total kinetic energy of the ship, and the hull structure is well protected.
      Conclusions  Further analysis indicates that, with the improvement of the initial berthing speed, port protection efficiency shows a decreasing trend. The ultimate berthing speed of the target ship of this study is 2.5 kn, and the recommended safe berthing speed is 2 kn. The results of this study can be used as a reference for ship berthing speed limits and hull structure energy absorption design.

     

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