科技通报

我国东南沿海频发的台风天气会引发极端风、浪、流联合荷载，因此有必要开展极端环境下海上风电桩基础水平承载性能的系统研究。本文采用荷载传递法与SACS(structural analysis of civil and marine systems)有限元模拟相结合的方法，建立了海上风电“塔筒–钢管桩”数值分析模型，研究流速、浪高和风速对桩基础挠度、剪力和弯矩的影响规律，主要结论如下：（1）桩身最大挠度、弯矩和剪力分别出现在桩顶位置、泥面以下约0.4D处和泥面以下约3.2D处；（2）流速对桩基础挠度的影响最为显著，而风速与浪高对剪力的影响更大；（3）风、浪、流联合作用下，剪力受影响最显著，其次为弯矩，挠度受影响最小。

Frequent typhoon events along the southeastern coast of China often induce extreme combined wind, wave,and current loads. Therefore, it is essential to conduct a systematic study on the horizontal bearing capacity of offshore wind turbine monopile foundations under such extreme environmental conditions. In this study, a numerical analysis model of an offshore wind turbine "tower–steel monopile" system was developed by integrating the load transfer theory with SACS(structural analysis of civil and marine systems) finite element simulations. The effects of current velocity,wave height, and wind speed on pile deflection, shear force, and bending moment were investigated. The main findings are as follows:(1) The maximum pile deflection,bending moment,and shear force occur at the pile top, approximately0.4D below the mudline, and approximately 3.2D below the mudline, respectively.(2) Current velocity has the most significant impact on pile deflection,while wind speed and wave height exert greater influence on shear force.(3) Under the combined action of wind, wave, and current loads, shear force is most affected, followed by bending moment, with deflection being the least affected.