摘要
以某海上风电试验样机为研究对象,基于现场原型观测获取整体风机结构在停机、正常运行、开(停)机及台风工况下的振动响应数据,系统地分析海上风机结构在不同运行状态下的振动响应时频域特性与变化规律,探讨影响海上风机结构振动的关键因素及其对风机振动安全性的影响规律.结果表明:在风机处于停机状态下,结构振动随环境风速的增加而显著增大;而运行状态时,叶轮转速对结构振动影响效应明显,对振动变化起到主导作用.海上风机在开(停)机过渡过程中振动显著大于正常运行状态,台风期风机在额定转速运行时的振动超过实测最大风速时停机工况的响应.塔筒顶部与基础顶部振动响应同步性说明整体风机具有很好的变形协调性.
This study considered one offshore wind turbine prototype as the research object,and its structural vibration responses under standstill,normal operational,startup,shutdown,and typhoon conditions were obtained through field measurement.First,the variation characteristics of the vibration responses under different operational conditions are examined systematically through time and frequency domain analyses.Furthermore,the key factors influencing structural vibration and their influence rules on the vibration safety of offshore wind turbine are explained clearly.Results show that the structural vibration increases with the increase in wind speed when the wind turbine operates under the standstill condition.The research results also show that the rotation speed of the blades has an obvious influence on structural vibration and plays a dominant role during vibration under the normal operational condition.Thereafter,the structural vibration of offshore wind turbine under the transition process of the startup(shutdown)condition is significantly greater than that under the normal operational condition with the same variables.Simultaneously,the observed vibration under the typhoon condition with rated rotation speed exceeds the corresponding responses under the standstill condition with maximum measured wind speed.Finally,the synchronization of the vibration responses measured from the tower and foundation indicates that the overall structure has good deformation coordination.
作者
董霄峰
练继建
王海军
Dong Xiaofeng;Lian Jijian;Wang Haijun(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300072,China;Frontier Technology Research Institute Limited Company,Tianjin University,Tianjin 301700,China)
出处
《天津大学学报（自然科学与工程技术版）》
EI
CSCD
北大核心
2019年第2期191-199,共9页
Journal of Tianjin University：Science and Technology
基金
国家科技计划项目创新方法工作专项资助(2016IM030100)
国家自然科学基金资助项目(51709202)
高等学校学科创新引智计划资助项目(B14012)
天津市科技计划资助项目(16PTGCCX00160)~~
关键词
海上风电
现场实测
振动特性
运行因素
台风工况
offshore wind power
field measurement
vibration characteristic
operational factor
typhoon condi-tion
