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系泊系统在深海洋流发电的整体安全性方面占据着重要地位,其部分或全部损毁均有可能造成洋流发电机丢失。为验证两种不同系固方法的优劣,依据凝集质量法建立方形网格系固结构的力学模型,以台湾海峡实测水文参数为环境载荷,探究该方形系固结构的动力响应问题。研究结果表明:对照组复合缆末端的有效张力变化幅值小,在大幅度急变流条件下,line1 EndB的有效张力随时间变化幅值仅为2line7,5的1/10;沿缆长方向,方形网格系固条件下,相对于复合缆两端有效张力的差值来说,发电机模型系缆两端有效张力的差值较小。单根缆绳断裂情况下,采用网格系固法,能够有效分散断裂缆绳的有效张力,相比于对照组复合缆line2 EndB端有效张力增量为4.94%,网格系固法未断裂缆绳1line11,1EndB有效张力增量仅为0.154%,这种方法表现出较强的应急能力。同时发现,网格系缆与网格基地的连接点沿边界对称分布时,系统整体的高频振动能够得到有效抑制。
Mooring systems play an important role in the overall safety of deep-ocean current power generation and some or all of them may cause the loss of ocean current generators. In order to verify the merits and demerits of two different methods, the mechanical model of square grid structure was established according to the agglomeration mass method. The dynamic response of the square structure was investigated using the measured hydrological parameters of the Taiwan Strait as the environmental load. The results show that the amplitude of effective tension at the end of the composite cable is small in the control group, and the amplitude of the effective tension of line1 EndB changes only 1/10 times of that of 2line7 and 5 under the conditions of severe acute flow; In the case of square grid system, the difference between the effective tension at both ends of the generator model mooring line is smaller than the difference between the effective tension at both ends of the composite cable. Compared with the control group, the effective tension increment of line2 EndB end was 4.94%, and the grid fasten method did not break the cable 1line11 , 1EndB effective tension increase of only 0.154%, this method showed a strong ability to respond. At the same time, it is found that when the connecting points between grid lines and grid base are symmetrically distributed along the boundary, the overall high frequency vibration of the system can be effectively suppressed.