Abstract Ship-to-ship collision events can have severe consequences such as loss of life and environmental degradation. For this reason, modern ship designs are required to incorporate a double-hulled structure to prevent inner-hull damage from such events. Using the experimental or numerical method to analyze the crashworthiness of double-hulled ship structures entails much effort, for which reason neither method is easy to adopt at the early design stage. In this paper, an existing simplified method called Ito's method is improved by a new buckling-and-contact-based expansion method. This method can be applied to double-hulled-structure or outer-hull-local-rupture failure mode. The perpendicular bow-to-side collision scenario is assumed for a conservative estimation of damage to a double-hulled structure. The method was verified in the present study by numerical ship collision simulations of several cases. The results for the buckling-and-contact-based expansion method and numerical simulation were similar for a blunt shape of striking body but different for a sharp shape.

中文翻译：

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用于评估双壳船结构耐撞性的简化屈曲接触膨胀法

摘要 船对船碰撞事件会产生严重的后果，例如人员伤亡和环境恶化。因此，现代船舶设计需要采用双壳结构，以防止此类事件对内壳造成损坏。使用实验或数值方法来分析双壳船结构的耐撞性需要付出很多努力，因此这两种方法在早期设计阶段都不容易采用。在本文中，一种称为 Ito 方法的现有简化方法通过一种新的基于屈曲和接触的扩展方法进行了改进。该方法可应用于双壳结构或外壳局部破裂失效模式。对于双壳结构损坏的保守估计，假定船首与舷侧垂直碰撞情况。该方法在本研究中通过几个案例的数值船舶碰撞模拟得到验证。基于屈曲和接触的膨胀方法和数值模拟的结果对于钝的撞击体形状相似，但对于尖锐的形状不同。