完成了浮式结构的静水刚度和几何非线性梁有限元分析

IF 4.4 2区工程技术 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Computers & Structures Pub Date : 2025-03-25 DOI:10.1016/j.compstruc.2025.107738

Ikjae Lee, Moohyun Kim

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引用次数: 0

摘要

本研究介绍了几何非线性梁有限元模型的完整静水切刚度。基于一致的全局流体静力学恢复刚度分析，建立了流体静力学切线刚度的完整形式。此外，还讨论了剪切变形梁的表面积分参数化方法，并对两种特殊截面类型（即椭圆形和矩形）进行了分类。观察发现，刚体载荷刚度（RBLS）的存在补充了几何刚度的不足部分，对于实现静压切线刚度的客观性至关重要。所开发的方法通过成熟的悬臂象限和可展开环实例进行了验证，然后应用于浮动结构的各种非线性流体静力学问题，包括浮球、刚性和柔性箱型驳船以及鱼笼项圈。

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The complete hydrostatic stiffness and geometrically nonlinear beam finite element analysis of floating structures

In this study, the complete hydrostatic tangent stiffness for geometrically nonlinear beam finite element model is introduced. Based on consistent global hydrostatic restoring stiffness analysis, the complete form of hydrostatic tangent stiffness is developed. In addition, a surface integration parameterization method for shear-deformable beams is discussed with classifications of two special types of cross-sections, i.e., elliptical and rectangular. The presence of rigid-body load stiffness (RBLS) complementing the lacking part of geometric stiffness is observed and found to be essential to fulfill objectivity of the hydrostatic tangent stiffness. The developed method is validated with well-established cantilever quadrant and deployable ring examples and then applied to various nonlinear hydrostatic problems for floating structures including floating spheres, rigid and flexible box-barges and fish-cage collars.

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来源期刊

Computers & Structures 工程技术-工程：土木

CiteScore

8.80

自引率

6.40%

发文量

122

审稿时长

33 days

期刊介绍： Computers & Structures publishes advances in the development and use of computational methods for the solution of problems in engineering and the sciences. The range of appropriate contributions is wide, and includes papers on establishing appropriate mathematical models and their numerical solution in all areas of mechanics. The journal also includes articles that present a substantial review of a field in the topics of the journal.