Abstract This paper analyses the importance of mooring design parametrisation on the dynamic behaviour of mooring loads. An exhaustive sensitivity analysis is performed to evaluate the variability of mooring loads because of inaccuracies in the definition of model inputs, including physical and numerical parameters. Results show a relevant dependence on the length and significance in other parameters, such as the weight together with the hydrodynamic equivalent diameter and the drag forces. An inaccuracy below 1% in the mooring reference length can generate loads of up to twice the design, and an incorrect definition of the weight or the drag coefficient in the mooring design can lead to a design load variability of up to 30%. Stiffness plays a crucial role in snap events, reaching load differences of 19% depending on the stiffness selected. This research is based on a set of numerical models capable of predicting the mooring system response. A dynamic numerical model with two schemes of resolution is implemented and calibrated according to an experimental test campaign. Other sources of results provided by a quasi-static model and commercial software, Sesam (DNV-GL), are incorporated. In general, the dynamic numerical models show a good accuracy with an experimental database composed by a set of 2D prescribed movement tests at the fairlead of the mooring system.

中文翻译：

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系泊系统参数化对精确浮动结构设计的重要性

摘要 本文分析了系泊设计参数化对系泊载荷动态行为的重要性。由于模型输入的定义不准确，包括物理和数值参数，因此进行了详尽的敏感性分析以评估系泊载荷的可变性。结果显示了对长度的相关依赖性和其他参数的重要性，例如重量以及流体动力学当量直径和阻力。系泊参考长度低于 1% 的误差可能会产生高达设计两倍的载荷，并且系泊设计中对重量或阻力系数的错误定义可能导致设计载荷变化高达 30%。刚度在咬合事件中起着至关重要的作用，根据所选刚度达到 19% 的负载差异。该研究基于一组能够预测系泊系统响应的数值模型。根据实验测试活动实现并校准了具有两种分辨率方案的动态数值模型。由准静态模型和商业软件 Sesam (DNV-GL) 提供的其他结果来源被合并。一般来说，动态数值模型显示出良好的精度，实验数据库由系泊系统导缆器处的一组二维规定运动测试组成。被纳入。一般来说，动态数值模型显示出良好的精度，实验数据库由系泊系统导缆器处的一组二维规定运动测试组成。被纳入。一般来说，动态数值模型显示出良好的精度，实验数据库由系泊系统导缆器处的一组二维规定运动测试组成。