摘要
在结冰海域,海冰往往是海洋工程结构的控制环境荷载,加装锥体能够有效降低冰力,避免海冰挤压破碎引起的结构自激振动现象。风电基础结构的抗冰锥体尺度较大,海冰与其相互作用的破坏形式及动力模型仍存在一定的不确定性。本文首先探讨了海上风电基础与导管架平台结构特性的差异;基于对冬季冰期内某风电基础结构的现场监测,明确海冰与锥体相互作用的破坏规律;依据实测的冰厚、冰速以及海冰破碎尺度等数据,分析海冰断裂长度与海冰厚度的统计关系,得到适用于风电基础结构锥体冰力周期模型;最后,采用修正的确定性冰力函数进行实测冰况下的结构冰振响应计算,并与实测的冰振响应数据比较。结果表明,海上风机属于一种柔性结构,海冰与风电基础锥体结构的相互作用主要产生弯曲破坏,修正的冰力周期计算模型适用于风电基础宽大锥体结构。
In ice regions,sea ice is often the controlled environmental load of marine engineering structures.Cones installed can effectively reduce ice force and avoid self-excited vibration of the structure caused by sea ice crushing.The ice-resistant cone of a wind turbine infrastructure is relatively large,so there are still some uncertainties in the damage forms and dynamic models of sea ice interaction.The differences in structural characteristics between offshore wind turbine foundations and jacket platforms were discussed first in this paper.Based on on-site monitoring of a wind turbine foundation during the winter glacial period,the failure law of sea ice and cone interaction was clarified.Based on measured ice thickness,ice speed and such data as sea ice fragmentation scale,the statistical relationship between sea ice fracture length and sea ice thickness was analyzed.And a cone ice cycle model suitable for wind turbine foundations was obtained.Finally,the structural vibration response under measured ice conditions was calculated using a modified deterministic ice function,and compared with the measured ice vibration response data.The results show that offshore wind turbines are of a flexible structure,and the interaction between sea ice and a wind turbine foundation cone structure mainly results in bending failure of sea ice.The modified ice cycle calculation model is applicable to the wide cone structures of wind turbine foundations.
作者
王国军
王帅飞
宋础
于嵩松
张大勇
张明飞
WANG Guo-jun;WANG Shuai-fei;SONG Chu;YU Song-song;ZHANG Da-yong;ZHANG Ming-fei(Department of Engineering Mechanics,Dalian University of Technology,Dalian 116023,China;School of Ocean Science&Technology,Dalian University of Technology,Panjin 124221,China;New Energy Design and Research Institute,Shanghai Survey and Design Institute Co.,Ltd.,Shanghai 200434,China)
出处
《船舶力学》
EI
CSCD
北大核心
2022年第3期375-382,共8页
Journal of Ship Mechanics
基金
国家自然科学基金项目(52071055,51679033)
国家重点研发计划项目(2017YFF0210700)
辽宁省高等学校创新团队资助项目(LT2019004)。
关键词
现场实测
风电基础
结构特性
冰荷载
抗冰锥体
field measurement
wind turbine foundation
structural characteristics
ice load
ice-resistant cone structure
作者简介
王国军(1989-),男,博士研究生;王帅飞(1992-),男,硕士研究生,E-mail:wang21728013@163.com;通讯作者:张大勇(1978-),男,博士,教授,E-mail:zhangdy@dlut.edu.cn。
