基于精确桩土模型的桁架式大型海上风力机地震动力学响应分析  

Seismic Dynamic Response Analysis of a Jacket Offshore Wind Turbine based on an Accurate Soil-pile Model

作　　者：薛世成 岳敏楠 闫阳天 李春[1] XUE Shi-cheng;YUE Min-nan;YAN Yang-tian;LI Chun(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai,China,200093)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《热能动力工程》2021年第6期143-151,共9页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金(51976131,51676131);国家自然基金国际合作与交流项目(51811530315);上海市“科技创新心动计划”地方院校能力建设项目(19060502200)。

摘　　要：为更精确研究桁架式大型海上风力机在地震载荷作用下的结构动力学响应,建立桩土模型,描述土体物理性质与桩-土间的相互作用,以桁架式支撑结构的美国可再生能源实验室(NREL)5 MW海上风力机为研究对象,建立有限元模型并分析在湍流风与地震联合作用下的动力学响应。结果表明:相较于湍流风,地震作用对桁架式海上风力机动力学响应的影响更加剧烈;地震导致塔顶位移显著增大;桁架结构与塔架的连接处存在Mises应力积聚,且在地震影响下其更为严重;地震对桩基的运动状态产生显著影响,位移最大值出现在桩底。In order to study the dynamic response of the jacket large offshore wind turbine under earthquake loading more accurately, a soil-pile model was established to describe the interaction between soil and pile-soil.With NREL 5 MW offshore wind turbine with trussed support structure as the research object, the finite element model was established and the dynamic response under the combined action of turbulent wind and earthquake was analyzed.The results show that compared with turbulent wind, the seismic effect on the structure response of jacked offshore wind is more severe.The earthquake causes the displacement of the top of the tower to increase significantly.There is Mises stress accumulation at the connection between jacket structure and tower, and it is more serious under the influence of earthquake.The earthquake has a significant influence on the movement state of pile foundation, and the maximum displacement occurs at the pile bottom.

关 键 词：桁架式海上风力机 动力学响应 桩土模型 地震 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]