Nonlinear vertical accelerations of a floating torus in regular waves

被引：21

作者：

Li, Peng ^{[1
]}

Faltinsen, Odd M. ^{[1
]}

Lugni, Claudio ^{[1
,2
]}

机构：

[1] NTNU, Ctr Autonomous Marine Operat & Syst AMOS, Dept Marine Technol, NO-7491 Trondheim, Norway

[2] CNR INSEAN Italian Ship Model Basin, Via Vallerano 139, I-00128 Rome, Italy

来源：

JOURNAL OF FLUIDS AND STRUCTURES | 2016年 / 66卷

关键词：

Model tests; Boundary Element Method; Waves; Torus; Nonlinear response; Error analysis; MOTIONS;

D O I：

10.1016/j.jfluidstructs.2016.08.007

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The longitudinal motions and vertical accelerations of a floating torus as well as wave motion inside the torus are studied by model tests in regular deep-water waves. Comparisons are made with linear and partly with second-order potential-flow theory for the smallest examined experimental wave height-to-wave length ratio 1/120. Reasonable agreement is obtained, in particular for the linear problem. The importance of 3D flow, hydroelasticity and strong hydrodynamic frequency dependency is documented. Experimental precision errors and bias errors, for instance, due to tank-wall interference are discussed. Numerical errors due to viscous effects are found to be secondary. Experiments show that the third and fourth harmonic accelerations of the torus matter and cannot be explained by a perturbation method with the wave steepness as a small parameter. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：589 / 608

页数：20

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