海上风电PHC高桩承台基础静力分析实例

Static Analysis of PHC High Pile Cap Foundation for Offshore Wind Power

为研究海上风电预应力高强度混凝土(PHC)管桩承台基础的静力特性,文章以越南某近海风电场风机基础为例,基于国内外海上风电风机基础规范标准,运用非线性有限元分析理论,通过非线性弹簧模拟桩-土之间的非线性相互作用,采用Morison方程计算波流荷载,对PHC高桩承台风机基础进行静力计算分析。结果表明:PHC高桩承台风机基础方案的自振频率在布置合理的情况下可以避开整机自振频率限制范围,各项指标满足现行标准要求。

To study the static characteristics of PHC cap foundation,the WTG foundation of an offshore wind farm in Vietnam is taken as an example.Based on the common domestic norms and standards,nonlinear finite element theory is used to simulate the nonlinear interaction between pile and soil with nonlinear spring,and the Morison equation is used to calculate the wave load.The WTG foundation of PHC pile cap has been calculated and analyzed.The vibration frequency of the PHC pile high pile cap foundation can avoid the limit range of natural vibration frequency for the WTG when the arrangement is reasonable.And all indexes of PHC pile high pile cap foundation scheme meet the requirements of current specifications and standards.