考虑土-结构相互作用的风力发电高塔振动控制研究
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摘要
研究了考虑土-结构相互作用(SSI)的风力发电高塔振动控制问题。通过理论推导,得到了安装有圆球减振装置(BVA)的风力发电高塔位移传递函数,其中,特别考虑了基础与地基之间的相对位移及转角。运用经典随机振动理论,计算得到了结构无控及有控响应的均方根值。结果表明,SSI对风力发电高塔系统的动力特性具有显著影响。考虑SSI后,体系第一阶频率降低,传递函数峰值增加。当地基土剪切刚度较小时,SSI将降低调谐至嵌固结构基频的减振装置的减振效率。因此,在对软土基地上的风力发电高塔进行振动控制分析与设计时,应充分考虑SSI的影响。
This paper presents a systematic study on vibration control of wind turbines considering soil-structure interaction(SSI).The transfer function of the wind turbine attached with a ball vibration absorber(BVA) is derived including the foundation translation and rotation relative to the soil medium.Based on the classical random vibration theory,the r.m.s values of responses of the structure with and without control are simulated.The results show that SSI has significant effect on the dynamic properties of the wind turbine tower system.The first natural frequency of the system is reduced and the peak value of the transfer function is increased due to SSI.For the soft soil,the SSI will lower the effectiveness of the BVA,when it is tuned to the natural frequency of the fixed-base structure.Therefore,it is included that in the analysis and design of vibration control of wind turbines,the effect of SSI should be taken into consideration.
This paper presents a systematic study on vibration control of wind turbines considering soil-structure interaction(SSI).The transfer function of the wind turbine attached with a ball vibration absorber(BVA) is derived including the foundation translation and rotation relative to the soil medium.Based on the classical random vibration theory,the r.m.s values of responses of the structure with and without control are simulated.The results show that SSI has significant effect on the dynamic properties of the wind turbine tower system.The first natural frequency of the system is reduced and the peak value of the transfer function is increased due to SSI.For the soft soil,the SSI will lower the effectiveness of the BVA,when it is tuned to the natural frequency of the fixed-base structure.Therefore,it is included that in the analysis and design of vibration control of wind turbines,the effect of SSI should be taken into consideration.
引文
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[13]Ghosh A,Basu B.Effect of soil interaction on the performance of liquid column dampers for seismic applications[J].Earthquake Engineering and Structural Dynamics,2005,34(11):1375-1389.
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[15]陈镕,薛松涛,王远功,等.土-结构相互作用对结构风振响应的影响[J].岩石力学与工程学报,2003,22(2):309-315.CHEN Rong,XUE Songtao,WANG Yuangong,et al.Effects of soil-structure interaction on the response of structure to wind-induced vibration[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(2):309-315.(in Chinese)
[2]Murtagh PJ,Ghosh A,Basu B,Broderick BM.Passive control of wind turbine vibrations including blade/tower interaction and rotationally sampled turbulence[J].Wind Energy,2008,11(4):305-317.
[3]Colwell S,Basu B.Tuned liquid column dampers in offshore wind turbines for structural control[J].Engineering Structure,2008,31(2):358-368.
[4]张自立,陈建兵,李杰.圆球减振装置对风力发电高塔的振动控制研究[J].地震工程与工程振动,2012,32(3):144-149.ZHANG Zili,CHEN Jianbing,LI Jie.Investigation on vibration control of wind turbines using a ball vibration absorber[J].Journal of Earthquake Engineering and Engineering Vibration,2012,32(3):144-149.(in Chinese)
[5]Zhang Z L,Chen J B,Li J.Theoretical study and experimental vertifiction control of offshore wind turbines by a ball vibration absorber[J].Structure and Infrastructure Engineering:Maintenance,Management,Life-cycle Design and Performance,2013,DOI:10.1080/15732479.2013.792098.
[6]陈国兴.岩土地震工程学[M].北京:科学出版社,2007.CHEN Guoxing.Geotechnical earthquake engineering[M].Beijing:Science Press,2007.(in Chinese)
[7]Wong HL,Luco JE.Structural control including soil structure interaction effects[J].Journal of Engineering Mechanics,1991,117(10):2237-2250.
[8]Xu YL,Kwok KCS.Wind-induced response of soil-structure-damper system[J].Journal of Wind Engineering and Industrial Aerodynamics,1992,41-44:2057-2068.
[9]Lou M,Wang W.Study on soil-pile-structure-TMD interaction system by shaking table model test[J].Earthquake Engineering and Engineering Vibration,2004,3(1):127-138.
[10]楼梦麟,宗刚,牛伟星,等.土-桩-钢结构-TLD系统振动台模型试验研究[J].地震工程与工程振动,2006,26(6):172-177.LOU Menglin,ZONG Gang,NIU Weixing,et al.Study on shaking table model test of soil-pile-steel structure-TLD interaction system[J].Journal of Earthquake Engineering and Engineering Vibration,2006,26(6):172-177.(in Chinese)
[11]Chopra AK,Gutierrez JA.Earthquake response analysis of multistory buildings including foundation interaction[J].Earthquake Engineering and Structural Dynamics,1974,3(1):65-77.
[12]Ghosh A,Basu B.Effect of soil interaction on the performance of tuned mass dampers for seismic applications[J].Journal of Sound and Vibration,2004,274(3-5):1079-1090.
[13]Ghosh A,Basu B.Effect of soil interaction on the performance of liquid column dampers for seismic applications[J].Earthquake Engineering and Structural Dynamics,2005,34(11):1375-1389.
[14]Jennings PC,Bielak J.Dynamics of building-soil interaction[J].Bulletin of the Seismological Society of America,1973,63(1):9-48.
[15]陈镕,薛松涛,王远功,等.土-结构相互作用对结构风振响应的影响[J].岩石力学与工程学报,2003,22(2):309-315.CHEN Rong,XUE Songtao,WANG Yuangong,et al.Effects of soil-structure interaction on the response of structure to wind-induced vibration[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(2):309-315.(in Chinese)
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