DYNAMIC ANALYSIS OF MOORING SYSTEM OF TRILATERAL TYPE MEGAWATT WAVE ENERGY DEVICE

Huang Zheng; Nie Ming; Li Mingjun; Duan Xinhui; Liu Xiaolu; Luo Xiaoyu

doi:10.19912/j.0254-0096.tynxb.2022-0199

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (6) : 30-38. DOI: 10.19912/j.0254-0096.tynxb.2022-0199

DYNAMIC ANALYSIS OF MOORING SYSTEM OF TRILATERAL TYPE MEGAWATT WAVE ENERGY DEVICE

Huang Zheng^1,3, Nie Ming^1,3, Li Mingjun¹, Duan Xinhui¹, Liu Xiaolu^1,3, Luo Xiaoyu^1,3

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Abstract

The analysis model of the trilateral type megawatt wave energy converter （MWEC） and its mooring system was established by using the ANSYS-AQWA software. The dynamic characteristics of the MWEC and mooring lines were calculated under normal intact state and one of mooring lines broken state, and the effects of the stiffness of polyester rope, environmental incident angle, and the length of platform chain on the minimum safety factor of the mooring system were analyzed. The numerical results show that the maximum tension of mooring system is significantly affected by the dynamic stiffness of the polyester rope. When the initial composition of mooring line is adopted, the minimum safety factor of the mooring system does not meet the requirements of the API RP 2SK code for some environmental incident angles. However, by adjusting the length of the platform chain, it can meet the requirements of the API RP 2SK code both in the normal intact state and in the broken state of one anchor line. Finally, according to the calculation and analysis, some suggestions are put forward for engineering design, so as to ensure the reliability of the mooring system and improve the economy of the whole project.

Key words

wave energy conversion / semi-submersible platform / hydrodynamics / polyester rope / mooring cables / failure

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Huang Zheng, Nie Ming, Li Mingjun, Duan Xinhui, Liu Xiaolu, Luo Xiaoyu. DYNAMIC ANALYSIS OF MOORING SYSTEM OF TRILATERAL TYPE MEGAWATT WAVE ENERGY DEVICE[J]. Acta Energiae Solaris Sinica. 2023, 44(6): 30-38 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0199

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