| 何奔，胡俊，徐普，韩勃，吕娜.海上风电大直径中空夹层钢管混凝土组合单桩基础截面尺寸多目标优化[J].海洋工程,2026,(1):73~81 |
| 海上风电大直径中空夹层钢管混凝土组合单桩基础截面尺寸多目标优化 |
| Multi-objective optimization of cross-sectional dimensions for large-diameter concrete-filled double skin steel tube monopile foundations in offshore wind power |
| 投稿时间：2024-12-26 修订日期：2025-04-25 |
| DOI：10.16483/j.issn.1005-9865.2026.01.007 |
| 中文关键词: 海上风电 三段式 中空夹层钢管混凝土 多目标优化 抗弯刚度 用钢量 |
| 英文关键词:offshore wind power three-segment concrete-filled double-skin steel tube multi-objective optimization bending stiffness steel consumption |
| 基金项目:国家自然科学基金面上项目（52271294，52471275）；国家自然科学基金联合基金重点项目（U23A20663）；浙江省尖兵研发攻关计划项目（2024C03031） |
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| 中文摘要: |
| 海上风电单桩基础具有结构简单、承载性能优越、建成后用海面积较小等优点，因此得到广泛应用。依托福建连江外海深远海海上风电场实际工程，提出一种上段为风机钢塔筒、泥下段为钢管桩、水中段采用中空夹层钢管混凝土组合结构的三段式新型单桩基础形式。为了获得水中段中空夹层钢管混凝土组合结构的最优截面尺寸，探究其结构性能以满足设计使用要求，采用基于遗传算法的多目标优化方法，以抗弯刚度和用钢量为双重优化目标，选取外钢管直径和壁厚、内钢管直径和壁厚4个参数为设计变量，在满足新型单桩基础组合结构强度和稳定性要求的基础上，分别以传统钢管单桩基础的抗弯刚度和用钢量为参照，获得了抗弯刚度大且用钢量适中的两组截面尺寸方案。结果表明：当抗弯刚度相同时，结构的用钢量相较于传统钢管单桩降低了21%，承载能力略低于传统钢管单桩；当用钢量相同时，结构的抗弯刚度相较于传统钢管单桩提高了71%，承载力提升了43%。单桩基础组合结构性能得到有效提升，两种优化方案的频率均未进入福建连江外海海域波浪主频范围。 |
| 英文摘要: |
| The monopile foundation for offshore wind power is widely adopted due to its simple structure, excellent load-bearing capacity, and minimal sea area occupation. Based on the Lianjiang offshore wind farm project in Fujian, this study proposes a novel three-segment monopile foundation consisting of a steel tower at the top, a steel pipe pile below the seabed, and a hollow-layered concrete-filled double-skin steel tube (CFDST) structure in the submerged section. To optimize the CFDST section's cross-sectional dimensions for the submerged segment, a genetic algorithm was employed with bending stiffness and steel consumption as dual objectives. Design variables included the diameters and wall thicknesses of the outer and inner steel pipes. The results indicate that when bending stiffness is the same, steel consumption is reduced by 21%, with a slightly lower bearing capacity than a traditional steel pipe monopile. When steel consumption is the same, bending stiffness increases by 71%, and bearing capacity improves by 43%. The composite monopile shows enhanced performance, and both optimized schemes avoid the dominant wave frequency range in the Lianjiang offshore area. |
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