Parametric study on the short-term extreme mooring tension of nylon rope for a point absorber

被引：8
|
作者：
Xu, Sheng [1 ]
Soares, C. Guedes [2 ]
机构：
[1] Jiangsu Univ Sci & Technol, Sch Naval Architecture & Ocean Engn, Zhenjiang 212003, Peoples R China
[2] Univ Lisbon, Ctr Marine Technol & Ocean Engn CENTEC, Inst Super Tecn, P-1049001 Lisbon, Portugal
来源：
OCEAN ENGINEERING | 2023年 / 267卷
关键词：
Point absorber; Extreme mooring tension; Nylon mooring; Nonlinear axial stiffness; WAVE ENERGY CONVERTER; DESIGN; TECHNOLOGIES; SYSTEMS; WIND;
D O I：
10.1016/j.oceaneng.2022.113248
中图分类号：
U6 [水路运输]; P75 [海洋工程];
学科分类号：
0814 ; 081505 ; 0824 ; 082401 ;
摘要：
A series of 1:40 model tests are carried out to study the dynamic responses of a point absorber moored by three taut nylon ropes under irregular wave conditions. The experimental results are applied to calibrate a numerical model, and then the calibrated numerical model is applied to study the influence of pretension, mooring axial stiffness, current velocity and tidal range on extreme mooring tension under head sea wave conditions. Both the global maximum method and the average conditional exceedance rate method are applied to study extreme mooring tension based on fifty 3-h fully coupled analyses. The nonlinear strain-tension curve is used in numerical simulations to consider the material non-linearities of nylon rope. To discuss the influence of axial stiffness on extreme mooring tension, nonlinear strain-tension curves of a worked rope and a new rope are studied. The numerical simulations under three current profiles are conducted to study the influence of current velocity on extreme mooring tension. It is found that the influence of axial stiffness and current velocity on extreme mooring tension is significant, and the influence of current velocity on extreme mooring tension reduces with the increase of mooring pretension.
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页数：16
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