海上风电桩基础冲刷坑的存在对风电场安全运行造成不利影响,须采用有效的冲刷防护措施稳固桩周泥沙。该文以山东海域某海上风电场为研究对象,提出混凝土联锁排防护措施,并将其简化为六列矩形块阵列模型,通过数值模拟分析了矩形块阵列模型的水动力特性。研究发现,第1排矩形块为整个矩形阵列模型的主要受力块,混凝土联锁排整体阻力可通过单独计算第1排单个矩形块来评估,能显著减少计算量; 其次,矩形块阻力系数随时间变化具有周期性,但随时间变化幅度较小。总体而言,本文结果对指导混凝土连锁排防护设计具有一定的工程意义。
Abstract
The existence of scour holes around the foundations of offshore wind farms has a detrimental effect on the safe operation of wind turbines, and effective scour protection measures are crucial for stabilizing the sediment around the piles. Taking an offshore wind farm in a Shandong sea area as a research object, this paper proposes the concrete blocks interlocking row protection method which are simplified into a six-column rectangular blocks array model. Based on numerical simulation, the hydrodynamic characteristic of the model is analyzed. It is found that the first row of rectangular blocks is the main force zone of the entire rectangular array model, and the overall drag coefficient of concrete interlocking rows can be evaluated by calculating the first row of individual rectangular block separately, which can significantly reduce the calculation time. In addition, the drag coefficient of blocks changes periodically with flow time, but the amplitude of change with flow time is small.
关键词
海上风电 /
数值模拟 /
冲刷防护 /
水动力特性 /
混凝土联锁排
Key words
offshore wind turbines /
numerical simulation /
scour protection /
hydrodynamic characteristics /
concrete blocks interlocking rows
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基金
华能集团总部科技项目“多维多源环境下海上风电场群规划优化和机组整体结构设计关键技术”（HNKJ20-H53）; 北京市科技新星计划（20220484046）; 海上风电场基础冲刷防护治理理论、措施及工程应用研究（HNKJ23-H18）
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