Parameterisation of nonlinear ship-induced 3D wave fields for the hydraulic design of protective structures in maritime waterways (PaNSiWa)

用于海上航道防护结构水力设计的非线性船舶诱发 3D 波场参数化 (PaNSiWa)

• 批准号: 323009320
• 负责人: Dr.-Ing. Markus Brühl
• 金额: --
• 依托单位: Faculteit Werktuigbouwkunde, Maritieme Techniek en Technische Materiaalwetenschappen (3mE)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/323009320?language=en
• 关键词: Parameterisation; nonlinear; ship; induced; 3D

In the last 15 years an increased number of serious damages of protective structures such as groins and revetments have been observed in the maritime waterways. The analyses of these damages have shown that the current design approaches for the rubble mound layers of such structures are not sufficient to ensure sufficient stability against ship-induced wave loads. Since these approaches are determined for wind-induced waves, they do not consider the long-period ship-wave components. A joint research project 'Ship-induced long-period loads for the design of rubble mound structures in maritime waterways' with BAW, HPA, IWW (RWTH Aachen) and LWI (TU Braunschweig) was initiated 2011. The focus of that project was to provide design standards for rubble mound structures. The analyses that have been conducted by LWI were completed in August 2013. The results have allowed us to clearly identify the knowledge gaps with respect to the classification and parameterization of ship waves. The project clearly has shown the need for a 3D analysis of three-dimensional, nonlinear ship wave fields, which was not part of the aforementioned joint research project. Moreover, it provided extensive ship wave data sets and valuable contacts, which are indispensable for the proposed research.The primary objective of the proposed project is to generate the scientific knowledge for the parameterization of ship-induced 3D wave fields as required for the hydraulic design of rubble mound structures in maritime waterways with a special focus on the spatial and nonlinear properties of ship waves. The key research issues are (i) the numerical implementation of a nonlinear Fourier transform for the nonlinear frequency-domain analysis of three-dimensional ship wake fields (3D-NLFT), (ii) the numerical implementation of the Hilbert-Huang transform for the nonlinear time-frequency-domain analysis of three-dimensional ship wake fields (3D-HHT), (iii) a comparative analysis of ship-wave data using the implemented analysis methods (3D-NLFT and 3D-HHT) as well as conventional FFT and (iv) the parameterization of 3D ship wave fields in order to determine the relevant hydraulic design parameters for protective rubble mound structures in maritime waterways.

在过去的15年里，在海洋水道中观察到越来越多的保护结构，如丁坝和护岸受到严重破坏。这些损坏的分析表明，目前的设计方法的碎石堆层的这种结构是不足以确保足够的稳定性，对船舶引起的波浪载荷。由于这些方法是针对风激波确定的，因此没有考虑长周期船波分量。与BAW、HPA、IWW（RWTH亚琛）和LWI（TU布伦瑞克）的联合研究项目“海上水道中碎石堆结构设计的船舶诱导长期荷载”于2011年启动。该项目的重点是为碎石堆结构提供设计标准。LWI进行的分析于2013年8月完成。结果使我们能够清楚地识别知识的差距方面的分类和参数化的船波。该项目清楚地表明，需要对三维非线性船舶波场进行三维分析，这不是上述联合研究项目的一部分。此外，它提供了广泛的船波数据集和有价值的接触，这是不可或缺的拟议research. Primary目标的拟议项目是产生的船舶引起的三维波场的参数化的科学知识，所需的水力设计的毛石墩结构在海上水道，特别注重的空间和非线性特性的船波。本文的主要研究内容是：（i）三维舰船尾流场非线性频域分析的非线性傅里叶变换（3D-NLFT）的数值实现;（ii）三维舰船尾流场非线性时频域分析的希尔伯特-黄变换（3D-HHT）的数值实现;（iii）使用已实施的分析方法对船波数据进行比较分析（3D-NLFT和3D-HHT）以及常规FFT，以及（iv）三维船舶波浪场的参数化，以确定相关的水力设计参数的防护碎石堤结构在海上航道。