考虑桩-土相互作用的超大型单桩式海上风机结构地震响应  

Seismic Response of Super-large Monopile Offshore Wind Turbine Structure Considering Pile-Soil Interaction

作　　者：许成顺[1] 李超越 石世刚 孙毅龙 XU Chengshun;LI Chaoyue;SHI Shigang;SUN Yilong(Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology,Beijing 100124,China;School of Civil Engineering,Hebei University of Engineering,Handan 056038,Hebei,China;Department of Civil Engineering,Wenzhou University,Wenzhou 325035,China)

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124 [2]河北工程大学土木工程学院,河北邯郸056038 [3]温州大学土木工程系,温州325035

出　　处：《北京工业大学学报》2024年第11期1301-1311,共11页Journal of Beijing University of Technology

基　　金：国家杰出青年科学基金资助项目(52225807)。

摘　　要：为了解决桩-土相互作用对超大型单桩式海上风机结构地震响应影响的问题,基于IEA 15 MW的固定式单桩海上风机原型,使用Abaqus建立考虑桩-土相互作用与泥面固定2种风机结构模型,桩-土相互作用通过一组非线性弹簧模拟。考虑风-波浪与地震联合作用,分析桩-土相互作用对超大型固定式单桩海上风机结构动力响应的影响。结果表明:针对超大型海上风机,桩-土相互作用效应使风机支撑结构的特征频率降低3%~6%;考虑桩-土相互作用的大兆瓦风机动力响应远大于泥面固定风机模型的动力响应;海上风机尺寸越大,桩-土相互作用引起的海上风机结构动力响应偏差越显著。To address the issue of the influence of pile-soil interaction on the seismic response of super-large monopile offshore wind turbine structures,based on the IEA 15 MW prototype of a fixed monopile offshore wind turbine,Abaqus was used to develop two structural models of the wind turbine considering pile-soil interaction and mud surface fixation,and the pile-soil interaction was simulated by a set of nonlinear springs.Considering the combined effect of wind-wave and earthquake,the influence of pile-soil interaction on the dynamic response of super-large fixed monopile offshore wind turbine structure was analyzed.Results indicate that for super-large offshore wind turbines,the pile-soil interaction effect reduces the eigenfrequency of the wind turbine support structure by 3%-6%,and the dynamic response of large megawatt wind turbines,when considering the pile-soil interaction,is significantly greater than that of the mud surface fixed wind turbine model,and the larger the size of the offshore wind turbine,the more significant the pile-soil interaction effect is.

关 键 词：桩-土相互作用 风-波浪-地震联合作用 单桩式海上风机 支撑结构 特征频率 动力响应 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程] TU312[建筑科学—结构工程]