摘要
为了评估在风载荷与冰载荷共同作用下的海上风力机结构动态响应,基于非线性有限元方法和气动阻尼模型,考虑风载荷与冰载荷的实时耦合作用,建立了一种新的单桩基础海上风力机结构与冰排碰撞数值分析方法。以5 MW单桩基础海上风力机与冰排的相互作用为研究对象,采用该方法进行了数值模拟。将风力机简化模型的一阶固有频率与风力机整体系统的一阶固有频率进行对比,采用大直径单桩风力机基础冰载荷的模型试验数据,验证冰材料本构模型和数值模拟的准确性。此外,还分析了风速和冰速对风力机塔顶端位移和碰撞力的影响。研究结果表明:风速和冰速对碰撞力及海上风力机结构动态响应的影响都较为显著。
In order to assess the structural response of an offshore wind turbine to the combined action of wind and ice loads, a new numerical analysis method is proposed, which is based on the nonlinear finite element method and aerodynamic damping model. Real time coupling effect of wind and ice loads is considered. In a case study, impacts between a typical 5-megawatt monopile-supported offshore wind turbine and the ice sheet are studied. To ensure the accuracy of numerical simulation, the lowest natural frequency of a simplified offshore wind turbine is compared with that of full rotor system. In addition, model tests of ice load for large-diameter offshore single pile wind turbine are introduced to verify the material model of the ice applied in this study. Influence of wind velocity and ice velocity on the top displacement and collision force is analyzed. The results show that both the wind and ice velocities have a significant effect on the structural dynamic response and collision force.
作者
宋明
王德鹏
刘昆
张婧
SONG Ming;WANG Depeng;LIU Kun;ZHANG Jing(School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China;College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《中国造船》
EI
CSCD
北大核心
2022年第3期1-10,共10页
Shipbuilding of China
基金
国家自然科学基金青年基金资助项目(51809126)
江苏省自然科学基金青年基金资助项目(BK20200998)。
关键词
单桩基础海上风力机
冰载荷
风载荷
动态响应
气动阻尼
碰撞力
monopile-supported offshore wind turbine
ice load
wind load
dynamic response
aerodynamic damping
collision force
