Effects of mooring systems on dynamic response of wave energy converter

LIAN Yushun; ZHANG Bin; ZHENG Jinhai; LIU Haixiao; MA Gang

doi:10.19693/j.issn.1673-3185.02223

Volume 17 Issue 1

Mar. 2022

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Article Navigation > Chinese Journal of Ship Research > 2022 > 17(1): 80-90

LIAN Y S, ZHANG B, ZHENG J H, et al. Effects of mooring systems on dynamic response of wave energy converter[J]. Chinese Journal of Ship Research, 2022, 17(1): 80–90, 116 doi: 10.19693/j.issn.1673-3185.02223

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Effects of mooring systems on dynamic response of wave energy converter

doi: 10.19693/j.issn.1673-3185.02223

LIAN Yushun^{1, 2, 3
,
,},
ZHANG Bin^{1, 2
,},
ZHENG Jinhai^{1, 2},
LIU Haixiao³,
MA Gang⁴

1.
Key Laboratory of Ministry of Education for Coastal Disaster and Protection, Hohai University, Nanjing 210098, China
2.
College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China
3.
State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China
4.
Yantai Research Institute and Graduate School, Harbin Engineering University, Yantai 265501, China

Received Date: 2020-12-15
Rev Recd Date: 2021-04-04

Available Online: 2022-01-29

Publish Date: 2022-03-02

Abstract

This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objectives Aiming at a mooring system design with cost-effectiveness and high performance for wave energy converter (WEC) , the effects of such systems on the capability of power take-off (PTO) system and positioning performance of WEC are investigated. Methods A two-body floating point absorber is chosen as the sample WEC. The open-source WEC-Sim and MoorDyn codes are used to design two types of mooring system for the WEC: one is a chain mooring system and the other is an integrated chain-rope (i.e., polyester fiber rope) mooring system. By performing time-domain analysis for the WEC with different mooring lines, the responses, such as WEC displacement, power take-off (PTO) and mooring line tension, are obtained respectively. Results The results show that, the effects of mooring systems on the displacement response of the floater are small, but these effects on the response of the spar body is obvious. For the WEC with a linear damper, these effects on the PTO response are negligible. Moreover, the line tensions of the integrated mooring system are lower than the corresponding tensions of the chain mooring system under the operational sea state. Conclusions The results of this study have reference value for the improved design of WEC mooring systems.
- polyester fiber ropes,
- WEC-sim,
- MoorDyn,
- wave energy converter (WEC),
- mooring system

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References(51)

References

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