砂土中加载角度对自升式海上风机安装船水平承载力的影响

Effect of Loading Angle on Horizontal Bearing Capacity of Jack-Up Wind Turbine Installation Vessel in Sandy Soil

针对砂土中风机安装船的水平极限承载特性问题,开展物理模型试验和数值分析,研究不同水平加载角度下风机安装船水平承载特性。结果表明:加载角度对风机安装船的水平极限承载力影响很大;风机安装船的水平极限承载力随着加载角度的增加缓慢上升,当加载角度达到30°左右时风机安装船的水平极限承载力达到最大,随即水平极限承载力随着加载角度的增大迅速下降。当加载角度为90°时风机安装船的水平承载力最小;桩靴底部的土压力变化明显大于顶部。当加载角度和船体不能保持垂直时,桩靴底部的土压变化趋于增大,离散程度也趋于增大,船体的稳定性降低。

Physical model tests and numerical analyses were carried out to study the horizontal ultimate bearing characteristics of jack-up wind turbine installation vessels in sandy soil under different horizontal loading angles.The results showed that the loading angle had great influence on the horizontal ultimate bearing capacity of the jack-up wind turbine installation vessel.The horizontal ultimate bearing capacity of the jack-up wind turbine installation vessel increased slowly with the increase of the loading angle.When the loading angle reached about 30°,the horizontal ultimate bearing capacity of the jack-up wind turbine installation vessel reached the maximum.Then the horizontal ultimate bearing capacity decreased rapidly with the increase of the loading angle.When the loading angle was 90°,the horizontal bearing capacity of the jack-up wind turbine installation vessel was minimum.The change of soil pressure at the bottom of spudcan was obviously greater than that at the top.When the loading angle and the hull could not remain vertical,the soil pressure change at the bottom of the spudcan tended to increase,the dispersion degree also tended to increase,and the stability of the hull decreased.