基于PISA方法的海上风机大直径单桩基础优化设计  

Optimization Design of Large-diameter Monopiles for Offshore Wind Turbines Using PISA Method

作　　者：高志康 张平[1] 张永飞[1] Gao Zhikang;Zhang Ping;Zhang Yongfei(Shandong Electric Power Engineering Consulting Institute Co.,Ltd.,Jinan 250013,China)

机构地区：[1]山东电力工程咨询院有限公司,济南250031

出　　处：《特种结构》2024年第5期42-46,共5页Special Structures

摘　　要：单桩基础结构是海上风机最常用基础型式,研究其承载机理和失效模式具有重要意义。API规范推荐的p-y曲线法低估了极限土抗力,导致单桩设计较为保守。PISA方法是一种面向海上风电大直径水平受力单桩的设计方法,利用四刚度弹簧模拟桩土的相互作用,能够更为真实地反映大直径单桩的受力模式。本文利用Plaxis Monopile Designer程序包,对某海上风电项目的大直径单桩基础进行计算分析及设计优化。计算结果表明,在满足结构强度、整机频率、疲劳损伤等指标的条件下,基于PISA的设计方法,可合理降低基础结构的用钢量。Monopiles are the most commonly used foundation type for offshore wind turbines,making it crucial to study their bearing mechanisms and failure modes.The p-y curve method recommended by the API specification tends to underestimate ultimate soil resistance,leading to conservative monopile designs.The PISA method,developed for large-diameter,horizontally loaded monopiles,employs four-stiffness springs to simulate soil-pile interaction,providing a more accurate representation of the stress modes in large-diameter monopiles.This paper utilizes the Plaxis Monopile Designer package to analyze and optimize the design of large-diameter monopiles for an offshore wind turbine project.The results indicate that,while meeting criteria such as structural strength,overall machine frequency,and fatigue damage,the PISA-based design method can effectively reduce the amount of steel required for the foundation structure.

关 键 词：风机基础 PISA方法 优化研究 

分 类 号：TM614[电气工程—电力系统及自动化] TU470[建筑科学—结构工程]