摘要
本文提出一种适用于50~120 m水深的新型半潜式浮式风机,用频域法研究浮式平台的水动力特性,通过建立风机-塔筒-浮式平台-系泊系统全耦合分析模型,考虑二阶差频波浪力作用,对其开展风、浪、流联合作用下的时域分析,重点分析不同流速条件下新型半潜式浮式风机耦合动力响应特性。分析结果表明:新型半潜式浮式风机结构设计合理,其固有周期能较好地避开波浪能量密集的周期范围,有效避免了共振发生;风浪条件一定的情况下,流速增大将使新型半潜式浮式风机的最大纵荡响应和锚链拉力显著增大,但对纵摇和艏摇响应有一定程度的抑制作用。流速变化对基础垂荡运动和发电功率影响较小。
A new semi-submersible floating offshore wind turbine(FOWT) suitable for water depths of 50-120 m was proposed in this paper. The hydrodynamic characteristics of the floating platform were studied by the frequency domain method. A fully coupled analysis model of the wind turbine-tower-floating platformmooring system was established considering the effect of the second-order difference frequency wave force.The time domain analysis of the new semi-submersible FOWT under the combined action of wind, waves and currents was carried out, focusing on the coupled dynamic response characteristics of the new semi-submersible FOWT under different flow velocity conditions. The results show that the structure of the new semi-submersible FOWT is reasonable and its natural period can avoid the wave energy-intensive period range,effectively avoiding the occurrence of resonance. Under certain wind and wave conditions, the maximum surge response and anchor chain tension will significantly increase with the increase of current velocity, but the pitch and yaw responses will be restrained to a certain extent.The variation of current velocity has little effect on foundation heave motion and power generation.
作者
乐丛欢
李阔
张浦阳
丁红岩
LE Cong-huan;LI Kuo;ZHANG Pu-yang;DING Hong-yan(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300350,China;School of Civil Engineering,Tianjin University,Tianjin 300350,China)
出处
《船舶力学》
EI
CSCD
北大核心
2023年第2期185-194,共10页
Journal of Ship Mechanics
基金
国家自然科学基金项目(52271287)
天津市自然科学基金项目(18JCYBJC22800)
天津大学自主创新基金项目(2022XSU-0033)。
关键词
海上风电
半潜式浮式风机
流速
耦合动力响应
offshore wind power
semi-submersible floating offshore wind turbine
current velocity
coupled dynamic response
