海上风电机组高桩承台基础结构参数优化分析及实用变形分析方法研究

Optimizational Analysis on Structural Parameters and Study on Practical Deformation Analysis Methods for High-Rise Pile Cap Foundations of Offshore Wind Turbines

采用SESAM软件分析当海上风电机组高桩承台基础结构的桩身直径、钢管桩壁厚和布桩半径变化时,对桩体静力性能和荷载效应的影响。结果表明:在外部荷载和环境参数一定的条件下,当桩径、壁厚和布桩半径变化时,结构的轴压、轴拉、剪力和弯矩均有不同程度的变化。基于计算数据,给出了结构的优化设计方法;通过对结构参数发生变化时泥面处竖向、水平位移和转角的规律分析,回归得到了泥面处竖向、水平位移和转角的变化曲线,并通过对不同海况下算例的验证,表明回归曲线精度良好。

The impact of diameters of piles,wall thickness of tubular steel piles and layout radii of piles for high-rise pile cap foundations of offshore wind turbines on the static performances and load effects of piles were analyzed by the SESAM software.The results indicated that:in certain conditions of external loads and environmental parameters,the changes in diameters of piles,wall thicknesses and layout radii of tube piles had different influences on the axial compression,axial tension,shear force and bending moment of the structure.Based on the calculation data,an optimized design method for the structure was proposed.By analyzing the rules of the vertical and horizontal displacement and rotation angle at the mud surface in changes of the structural parameters,the regression curves were obtained,which were verified by examples in different sea conditions and was of good accuracy.