A mathematical model for the dynamic analysis of multi-body floating platforms with complex mechanical constraints

IF 4.6 2区工程技术 Q1 ENGINEERING, CIVIL

Ocean Engineering Pub Date : 2024-11-15 DOI:10.1016/j.oceaneng.2024.119640

Thiago S. Hallak, José F. Gaspar, C. Guedes Soares

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引用次数: 0

Abstract

The new methodology based on generalised coordinates for the analysis of floating multi-body systems with nonlinear geometric constraints is developed, and it is demonstrated through numerical application for a hybrid floating wind-wave platform consisting of a floating offshore wind turbine and an articulated wave energy converter that moves a hydraulic piston. The formulation is applied to achieve explicit formulae regarding the dynamic response in a low-dimensional scenario used to verify a post-processing code. The verification considers the nonlinear geometric constraints, hydrodynamic interaction, the dynamics of articulated arms, and the dynamics of hydraulic power take-off systems. An analytical expression for the system's natural frequencies is attained and verified likewise. The results presented in this paper indicate significant improvement in the simulation and analysis of multi-degrees-of-freedom nonlinear hydrodynamic systems, which will ultimately be necessary for designing efficient hybrid floating wind-wave platforms.

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具有复杂机械约束的多体浮动平台动态分析数学模型

本研究开发了基于广义坐标的新方法，用于分析具有非线性几何约束的浮动多体系统，并通过数值应用演示了由浮动海上风力涡轮机和铰接式波浪能转换器（可移动液压活塞）组成的混合浮动风浪平台。应用该公式可在低维场景中获得明确的动态响应公式，用于验证后处理代码。验证考虑了非线性几何约束、流体动力相互作用、铰接臂的动力学以及液压动力输出系统的动力学。同样，还获得并验证了系统自然频率的分析表达式。本文介绍的结果表明，多自由度非线性流体动力系统的模拟和分析能力有了显著提高，这对于设计高效的混合浮动风浪平台是必不可少的。

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来源期刊

Ocean Engineering 工程技术-工程：大洋

CiteScore

7.30

自引率

34.00%

发文量

2379

审稿时长

8.1 months

期刊介绍： Ocean Engineering provides a medium for the publication of original research and development work in the field of ocean engineering. Ocean Engineering seeks papers in the following topics.