摘要
针对风电装备服役中多次出现船舶失控撞击风电单桩基础结构,导致其承载性能改变,造成严重安全隐患的问题,采用非线性有限元法,结合船撞海上风电单桩基础结构过程中涉及的材料、几何及接触非线性问题,考虑桩土作用,提出并采用船舶-风电结构-土体全耦合模型。以工程实际风电单桩基础结构为研究对象,对船撞前结构极限强度、结构损伤与损伤后结构剩余强度进行了计算,并对船撞后基础结构损伤特性与剩余强度的变化规律进行了分析,获得了船撞过程速度和角度参数与受损结构剩余强度的相互关系。得出准静态法在非线性求解过程中处理收敛性问题上更有优势;采用动态显式求解程序能更好地求解碰撞过程中各参数对碰撞结果的影响;进行受损后剩余极限强度研究时应先进行动态衰减能量分析等结论。
During the service of the offshore wind farm, there are some vessels out-of-control bumping the foundation structure, resulting in the changes in the bearing performance of the structure and causing serious safety hazards. Using nonlinear finite element method, combined with the material, geometry, and contact nonlinear problems involved in the process of the vessel bumping the offshore wind monopile foundation structure, and considering the pile-soil interaction, a vessel-wind turbine structure-soil full coupling model is proposed and adopted. Taking the actual offshore wind turbine monopile foundation structure as the research object, the ultimate strength of the structure before the vessel collision, the structural damage and the residual intensity of the structure after the damage are calculated, and the change law of the damage characteristics and the residual intensity of the foundation structure after the vessel collision is analyzed, and the relationship between the velocity and angle parameters and the residual intensity of the damaged structure during vessel collision is obtained. It is concluded that the quasi-static method has more advantages in dealing with convergence problems in the nonlinear solution process. and the dynamic explicit solution program can better solve the impact of various parameters on the collision result during the collision process, and it is necessary to conduct dynamic attenuation energy analysis firstly.
作者
元国凯
方辉
马兆荣
孙计勃
汤东升
YUAN Guokai;FANG Hui;MA Zhaorong;SUN Jibo;TANG Dongsheng(China Energy Engineering Group Guangdong Electric Power Design Institute Co.,Ltd.,Guangzhou 510663,China;College Of Engineering,Ocean University of China,Qingdao 266100,China)
出处
《内蒙古电力技术》
2022年第5期7-15,共9页
Inner Mongolia Electric Power
基金
广东省促进经济发展专项基金“基于大数据的海上风电场支撑结构强度与疲劳实时评估研究”(粤自然资源合[2019]019)。
关键词
海上风电
基础结构
极限强度
准静态法
船舶碰撞
剩余强度
offshore wind turbine
infrastructure
ultimate strength
quasi-static method
ship collision
residual intensity
