摘要
针对冰区海域风机结构冰激锁频振动问题,深入开展其冰激振动响应分析,提出基于三维摆式阻尼器的冰区风机振动控制方法。基于M??tt?nen-Blenkarn自激振动理论,采用APDL开发冰区风机自激振动分析程序;基于叶素动量理论,考虑Prandtl叶尖损失修正和Grauert修正,利用MATLAB编程计算获得风机叶片空气动力载荷;针对NREL 5 MW海上单桩风机结构,考虑我国渤海海域一年一遇冰情,开展不同方向冰-风组合工况下的振动响应分析,给出风机结构发生锁频事件的冰速范围,并对有、无三维摆式阻尼器的风机塔筒响应进行对比分析,结果表明:单桩风机发生锁频事件对应的冰速范围为0.01~0.06 m/s,冰-风同向时,风机发生冰激锁频所对应的冰速范围最大,塔筒结构响应最大;三维摆式阻尼器能够显著抑制冰-风载荷联合作用下的塔筒面外和面内振动响应,从而大大提高其服役的安全性。该研究成果可为冰区服役风机结构的安全运行提供技术支持。
Aiming at the problem of ice-induced frequency lock-in(FLI)vibration of offshore wind turbine(OWT)in ice area,the ice-induced vibration response analysis was performed,and the wind turbine vibration control method in ice area was proposed based on 3-D pendulum tuned mass damper(3 D-PTMD).Based on the self-excited vibration theory of M??tt?nen-Blenkarn,ANSYS parametric design language(APDL)was used to develop the wind turbine self-excited vibration analysis program in ice area.Based on the blade element momentum theory,considering Prandtl blade-tip loss correction and Grauert correction,the aerodynamic load of wind turbine blade was calculated by using the program developed with MATLAB.The national renewable energy laboratory(NREL)5 MW offshore monopile wind turbine was taken as an example.Considering the once-in-a-year ice situation in Bohai Sea of our country,the vibration response analyses of the wind turbine structure under different directions of ice-wind combination conditions were performed.The ice speed range for FLI event happening was deduced,and vibration responses of the wind turbine tower with and without 3 D-PTMD were compared.The results showed that the ice speed corresponding to FLI happening of the monopile OWT is within the range of 0.01 m/s-0.06 m/s;when ice and wind acting on the turbine structure in the same direction,the ice speed range corresponding to FLI happening of the monopile OWT is the maximum and the vibration response of the tower structure is the maximum;3 D-PTMD can significantly suppress in-plane and out-plane vibration responses of the tower under combined action of ice-wind loads to greatly improve its service safety;the study results can provide a technical support for safe operation of OWTs serving in ice area.
作者
朱本瑞
孙超
黄焱
ZHU Benrui;SUN Chao;HUANG Yan(State Key Lab of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300072,China;Department of Civil and Environmental Engineering,Louisiana State University,Baton Rouge,LA 70803,USA)
出处
《振动与冲击》
EI
CSCD
北大核心
2021年第9期133-141,共9页
Journal of Vibration and Shock
基金
国家科技重大专项项目(2016ZX05058-004-002)
天津大学自主创新基金(2020XT-0027)。
