摘要
针对半潜型浮式基础横撑和塔柱底部的弯矩特性,文章采用了气动-水动力-结构弹性耦合的时域分析方法,以DeepCwind浮式风机系统为研究对象,进行了不同风浪组合下的全耦合分析。该方法将各浮筒看作独立浮体,采用多体水动力理论预报浮式基础的波浪载荷,实现横撑与浮筒连接处弯矩的计算。计算结果表明:风载荷和波浪载荷对塔柱底部的弯矩均有明显的影响,而横撑弯矩主要来源于波浪载荷;相对于塔柱底部,横撑更容易发生破坏;将风和波浪单独引起的弯矩时历直接相加,可以较好地模拟风浪联合作用下横撑和塔柱的弯矩特性。研究结果可以为多浮筒半潜浮式风机的疲劳评估提供参考。
In order to investigate the bending moment of the tower base and cross braces for the multi-column semi-submersible floating wind turbine, the present study conducts the aero-hydroelastic coupling analysis for the DeepCwind floating wind turbine under different combination of wind and wave. These analyses take the columns of the floating foundation as individual floater,and utilize the multi-body potential theory to predict the wave load, thus to achieve the calculation of the bending moment of the cross braces. The results indicate that wind and wave loads both has significant influence on the bending moment at tower base, but the cross brace bending moment mainly results from the wave load. Compared with the tower base, the cross braces seem to be more prone to damage. The bending moment obtained from the coupling analysis can be reasonably approximated by the superposition of those induced by only-wind and only-wave. The obtained results can be helpful for the fatigue assessment of the multi-column semi-submersible floating wind turbine.
作者
范增辉
王坤鹏
李良碧
Fan Zenghui;Wang Kunpeng;Li Liangbi(Institue of Naval Achitecture&Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China)
出处
《可再生能源》
CAS
北大核心
2019年第12期1862-1868,共7页
Renewable Energy Resources
基金
国家自然科学基金资助项目（51709135）
江苏省自然科学基金资助项目（BK20160557）
关键词
多浮筒浮式风机
全耦合分析
塔柱底端
横撑
multi-column floating wind turbine
fully coupled simulation
tower base
cross brace
