Simulation and experimental testing of the collision behaviour of ships with double hulls filled with particles

该研究项目旨在通过在双壳结构的船舶中填充合适的颗粒状材料来提高其安全性。这包括开发和验证模拟方法，以提高双壳船舶的碰撞安全性。为此，颗粒状材料被用来填充两个船体层之间的空洞，该空洞也可以被清空以进行检查。在双壳船舶与另一艘船相撞的情况下，填充材料的使用增加了穿透阻力，因此可以避免穿透--例如，穿透对方的球状船头。这将大大降低碰撞的风险。为了评价各种颗粒充填材料的有效性，正在发展一种结合现代质点方法和有限元方法的多尺度模拟方法。它将被用来模拟碰撞事件，并检查不同颗粒填充物的适用性。在本项目拟议的二期工程中，将进一步发展模拟方法，并将其应用于实际船舶双壳结构的计算。这将使我们能够评估填充了颗粒状材料的双层船体的改进空间。将设计适当的实验来验证模拟，并能够对有限元分析期间使用的材料模型进行参数识别。

The research project aims to improve the safety of ships with a double hull construction by filling them with a suitable granular material. This involves developing and validating simulation methods to increase the collision safety of double-hull vessels. For this purpose, granular materials are used to fill the cavity between the two hull layers which can also be emptied for inspection purposes. In the event that a double hulled-ship collides with another vessel, the use of the filler material increases the penetration resistance, so that a penetration -- of the counterpart's bulbous bows, for instance -- can be avoided. This would considerably reduce the risks of a collision. To evaluate the effectiveness of various granular filling materials, a multiscale simulation method combining modern particle methods and finite element methods is being developed. It will be used to simulate a collision event and examine the suitability of different granular fillers. In the proposed second period of this project the simulation methods will be further developed and applied to the computation of a real double hull structure of a vessel. This will enable us to assess the room for improvement of double hulls that are are filled with granular material. Appropriate experiments will be designed to validate the simulation and to enable a parameter identification of the material models used during the finite element analysis.