The Amalia lander is a modular gravity-based structure capable of executing different tasks in subsea conditions such as monitoring, surveillance and docking autonomous underwater vehicles, and could work as a platform for validating coatings, damage at foundations and scour protections and integrity of new materials, among other applications. This lander has a unique complex geometry and is made of the eco-friendly material polyoxymethylene, a high-performance thermoplastic of low cost, low density and high stiffness. This paper elaborates on the latest design developments of Amalia, including in situ material characterisation and numerical modelling activities, which focus on fulfilling the rising needs of the blue economy in the subsea engineering field. Material characterisation included tensile and Charpy impact experimental tests. The experimental curve was used to improve the numerical models (Ansys software). Full-scale data, obtained at Berlenga Grande Island, were used to compile design information on loads and boundary conditions in order to set numerical and experimental trials used to study Amalia's structural reliability. The Amalia lander was studied and its design was upgraded, the details of which are presented here. Further research showed that both the interface between the rod and the ballast weight and the bearing connection between the cage and the sphere fork can be improved.

中文翻译：

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具有原位条件的全尺寸海底着陆器Amalia的数值模拟

Amalia着陆器是基于重力的模块化结构，能够在海底条件下执行各种任务，例如监视，监视和停泊自动水下航行器，并且可以用作验证涂层，地基损坏和冲刷保护以及新材料完整性的平台，以及其他应用程序。该着陆器具有独特的复杂几何形状，由环保材料聚甲醛制成，聚甲醛是低成本，低密度和高刚度的高性能热塑性塑料。本文详细介绍了Amalia的最新设计发展，包括原位材料表征和数值建模活动，这些活动的重点是满足海底工程领域对蓝色经济不断增长的需求。材料表征包括拉伸和夏比冲击试验。实验曲线用于改进数值模型（Ansys软件）。为了获得用于研究Amalia结构可靠性的数值和实验试验，使用了在Berlenga Grande Island上获得的全面数据来汇编有关载荷和边界条件的设计信息。对Amalia着陆器进行了研究，并对其设计进行了升级，详细信息在此处介绍。进一步的研究表明，杆与压载物之间的界面以及保持架与球叉之间的轴承连接都可以得到改善。的结构可靠性。对Amalia着陆器进行了研究，并对其设计进行了升级，详细信息在此处介绍。进一步的研究表明，杆与压载物之间的界面以及保持架与球叉之间的轴承连接都可以得到改善。的结构可靠性。对Amalia着陆器进行了研究，并对其设计进行了升级，详细信息在此处介绍。进一步的研究表明，杆与压载物之间的界面以及保持架与球叉之间的轴承连接都可以得到改善。