摘要
为分析冲刷深度对海上风力机(offshore wind turbine, OWT)吸振阻尼系统鲁棒性的影响,选用NREL发布的某5 MW单桩海上风力机作为研究对象,采用大直径p-y曲线法考虑桩土耦合效应,研究了冲刷深度对碰撞调谐质量阻尼器(pounding tuned mass damper, PTMD)与调谐质量阻尼器(tuned mass damper, TMD)减震效果影响规律。数值分析结果表明:随冲刷深度增加,风力机前三阶频率均呈下降趋势,其中一阶频率下降1.1%,三阶频率下降达7.8%;随冲刷深度增加,风力机塔筒地震响应总体呈放大趋势;TMD与PTMD均能有效控制海上风力机在地震荷载作用下的动力响应,PTMD的减震效果略高于TMD;按无冲刷工况对阻尼器进行设计,两种阻尼器的减震效果随冲刷深度的增加呈现放大的趋势,对冲刷引发的失谐现象均表现出了足够的鲁棒性。
A 5 MW monopile offshore wind turbine(OWT)released by NREL was chosen as the research object to analyze the effect of scour depth on the damping effect of offshore wind turbine vibration absorption damping system.The large-diameter p-y curve method was adapted to consider the pile-soil coupling effect,and to analyze the scour depth effect on the vibration control performance of the tuned mass damper(TMD)and the pounding tuned mass damper(PTMD).Numerical results show that:with the increment of scour depth,the first-order frequency decreased by 1.1%and the third-order frequency decreased by 7.8%.The seismic response of the OWT is generally amplified with an increment of scour depth.Both the tuned mass damper(TMD)and the PTMD were effective in reducing the seismic response of the OWT,while the damping effect of PTMD is slightly higher than that of TMD.Both the TMD and the PTMD are robust against the detuning phenomenon induced by the scour,and with the increment of the scour depth,the damping effect is amplified.Consequently,the design of the dampers can be based on the non-scouring condition in an actual project.
作者
张鹏
张家望
崔春义
李静波
ZHANG Peng;ZHANG Jiawang;CUI Chunyi;LI Jingbo(College of Transportation Engineering,Dalian Maritime University,Dalian 116026,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2024年第16期136-145,共10页
Journal of Vibration and Shock
基金
国家自然科学基金(51808092,52178315)
海底工程技术与装备国际联合研究中心开放基金(3132023362)
中央高校基本科研业务费专项资金(3132024171)。
