Chinese Journal of Ship Research, Volume. 17, Issue 1, 80(2022)
Effects of mooring systems on dynamic response of wave energy converter
Figures & Tables(24)
Fig. 11. Comparison of the interaction PTO force () between floater and Spar body in two mooring systems under operational sea state工作海况下2种系泊系统中浮子与Spar式底板之间的相互作用力()比较
Fig. 12. Comparison of instantaneous power () between floater and Spar body in two mooring systems under operational sea state工作海况下2种系泊系统中浮子与Spar式底板之间的瞬时功率()比较
Table 1. Main particulars of the two-body floating point absorber
View tableView in ArticleTable 1. Main particulars of the two-body floating point absorber
参数 浮子 Spar式底板 外直径/m 20 6 质量/t 727.01 878.3 高度/m 5 38 重心坐标/m (0, 0, −0.72) (0, 0, −21.29) $ {I}_{xx}/ $ $ (\mathrm{k}\mathrm{g}{\cdot \mathrm{m}}^{-2}) $ $ 2.09\times {10}^{7} $ $ 9.44\times {10}^{7} $ $ {I}_{yy}/ $ $ (\mathrm{k}\mathrm{g}{\cdot \mathrm{m}}^{-2} )$ $ 2.13\times {10}^{7} $ $ 9.44\times {10}^{7} $ $ {I}_{{\textit{z}}{\textit{z}}}/ $ $( \mathrm{k}\mathrm{g}{\cdot \mathrm{m}}^{-2}) $ $ 3.71\times {10}^{7} $ $ 2.85\times {10}^{7} $ $ {I}_{y{\textit{z}}}/ $ $( \mathrm{k}\mathrm{g}{\cdot \mathrm{m}}^{-2} )$ $ 4.3\times {10}^{3} $ $ 2.18\times {10}^{5} $
Table 2. Main particulars of mooring lines
View tableView in ArticleTable 2. Main particulars of mooring lines
参数 锚链系泊构型 混合缆系泊构型 系缆总长/ m 280 280 海底接触段的锚链长度/ m 240 30 连接沉子（重块）/个 − 1 聚酯缆绳/ m − 210 连接浮标/个 1 1 悬挂段的锚链长度/ m 40 40
Table 3. Main particulars of components of mooring lines
View tableView in ArticleTable 3. Main particulars of components of mooring lines
系缆组件 参数 数值 锚链（R4k4 studlink 型） 直径/mm 76 空气中重量/(kg·m−1) 126.494 材料阻尼比 0.8 刚度/kN $ 5.83\times {10}^{5} $ 横向附加质量系数 1 切向附加质量系数 0 横向拖曳系数 1.6 切向拖曳系数 0.05 最小破断强度/kN 6 001.31 连接沉子（重块） 质量 $ /\mathrm{k}\mathrm{g} $ 7 850 体积 $ /{\mathrm{m}}^{3} $ 1 聚酯缆绳 直径/mm 144 空气中重量/(kg·m−1) 14.4 材料阻尼比 0.3 刚度/kN $ 2.26\times {10}^{4} $ 横向附加质量系数 1 切向附加质量系数 0 横向拖曳系数 1.6 切向拖曳系数 0.05 最小破断强度/kN 5 880 连接浮标 质量 $ /\mathrm{k}\mathrm{g} $ 122 体积 $ /{\mathrm{m}}^{3} $ 1 拖曳系数和浮子投影面积的乘积 0.5 附加质量系数 1
Table 4. Statistical data of the WEC under operational sea state
View tableView in ArticleTable 4. Statistical data of the WEC under operational sea state
响应 系缆类别 平均值/m 标准差/m 最大值/m 最小值/m 浮子纵荡/m 锚链 0.002 1 0.244 9 0.594 5 −0.643 9 混合缆 0.003 8 0.250 5 0.614 5 −0.658 4 浮子垂荡/m 锚链 0.000 4 0.239 2 0.622 4 −0.607 2 混合缆 0.000 4 0.239 2 0.622 2 −0.607 1 浮子纵摇/(°) 锚链 0.000 2 0.007 2 0.017 4 −0.017 9 混合缆 0.000 2 0.007 1 0.017 0 −0.017 2 Spar式底板纵荡/m 锚链 0.003 1 0.100 7 0.255 8 −0.309 5 混合缆 0.003 8 0.250 5 0.614 5 −0.658 4 Spar式底板垂荡/m 锚链 −0.114 3 0.029 5 $ 4.79\times {10}^{-4} $ −0.184 2 混合缆 −0.197 9 0.036 2 $ 4.36\times {10}^{-7} $ −0.268 0 Spar式底板纵摇/(°) 锚链 0.000 2 0.007 2 0.017 4 −0.017 9 混合缆 0.000 2 0.007 1 0.017 0 −0.017 2
Table 5. Statistical data of the PTO response under operational sea state
View tableView in ArticleTable 5. Statistical data of the PTO response under operational sea state
系泊类型 统计类型 相对位移/m 相对速度 /(m·s−1) ${F}_{\rm{PTO} }/\rm{kN}$ PPTO /(kN·m·s−1) 锚链 最大值 0.692 0.546 653.67 358.329 平均值 0.115 6.29E-05 −0.075 50.570 最小值 −0.438 −0.545 −655.74 0 混合缆 最大值 0.777 0.546 653.67 358.29 平均值 0.199 0.000 276 −0.331 50.584 最小值 −0.353 −0.545 −655.71 0
Table 6. Statistical data of line tensions at fairlead in two mooring systems under operational sea state
View tableView in ArticleTable 6. Statistical data of line tensions at fairlead in two mooring systems under operational sea state
系泊类型 缆号 平均值/kN 标准差/kN 最大值/kN 最小值/kN 锚链 1 177.924 11.095 209.411 151.282 2 177.937 5.825 193.872 160.655 3 177.937 5.825 193.872 160.655 混合缆 1 47.045 0.761 49.230 44.997 2 47.036 0.354 48.090 46.047 3 47.036 0.354 48.090 46.047
Table 7. Statistics of line tensions at fairlead in two mooring systems under extreme sea state
View tableView in ArticleTable 7. Statistics of line tensions at fairlead in two mooring systems under extreme sea state
系泊类型 缆号 平均值/kN 标准差/kN 最大值/kN 最小值/kN 锚链 1 204.772 149.029 1 330.540 0.067 2 200.901 53.851 665.646 2.194 3 200.901 53.851 665.646 2.194 混合缆 1 48.114 9.552 122.511 18.331 2 47.614 4.999 69.317 31.902 3 47.614 4.999 69.317 31.902
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Yushun LIAN, Bin ZHANG, Jinhai ZHENG, Haixiao LIU, Gang MA. Effects of mooring systems on dynamic response of wave energy converter[J]. Chinese Journal of Ship Research, 2022, 17(1): 80
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Category: Ship Design and Performance
Received: Dec. 15, 2020
Accepted: --
Published Online: Mar. 24, 2025
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