基于时域法的不同塔架风力机抗台风分析
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摘要
为探讨不同塔架形式风力机的抗台风性能,基于Abaqus有限元软件建立4种不同塔架形式的风力机一体化模型,用自回归(AR)法对脉动风时程进行模拟,分别进行了模态分析和台风时程分析.结果表明,风轮和机舱对风力机自振频率的影响较大;钢筋混凝土锥筒塔架的最大顺风向位移随台风风速的增加呈平缓线性增加趋势,而其他3种塔架的位移随风速的增加表现为非线性增加.钢管格构式塔架为轻型柔性结构,其风载响应最为显著,钢锥筒塔架次之,而钢筋混凝土塔架因具有较大的自重和刚度,其位移响应最小,抗风性能较好.
In order to investigate the typhoon-resistance of wind turbines with different towers,four wind turbine integration models with different forms of towers were built by Abaqus finite element software and Autoregressive(AR)model was used to simulate the fluctuating wind for modal analyses and typhoon time-history analyses.The results show that the natural frequencies of wind turbines are greatly affected by wind rotor and nacelle.When the typhoon wind speed increases,the maximum along-wind displacement of the steel conical-cylindrical tower climbs linearly,while those of the other 3 towers show a significant nonlinear growth.As a lightweight flexible structure,the steel tube lattice tower exhibits the greatest dynamic response,and the steel conical-cylindrical tower exhibits the second one.Because of the considerable stiffness and weight,the displacement response of the reinforced concrete conical-cylindrical tower is the minimum,and the typhoon-resistance capability is the best.
In order to investigate the typhoon-resistance of wind turbines with different towers,four wind turbine integration models with different forms of towers were built by Abaqus finite element software and Autoregressive(AR)model was used to simulate the fluctuating wind for modal analyses and typhoon time-history analyses.The results show that the natural frequencies of wind turbines are greatly affected by wind rotor and nacelle.When the typhoon wind speed increases,the maximum along-wind displacement of the steel conical-cylindrical tower climbs linearly,while those of the other 3 towers show a significant nonlinear growth.As a lightweight flexible structure,the steel tube lattice tower exhibits the greatest dynamic response,and the steel conical-cylindrical tower exhibits the second one.Because of the considerable stiffness and weight,the displacement response of the reinforced concrete conical-cylindrical tower is the minimum,and the typhoon-resistance capability is the best.
引文
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[2]贺广零,李杰.风力发电高塔系统风致动力响应分析[J].电力建设,2011,32(10):1-9.HE G L,LI J.Dynamic response analysis of wind-excited wind turbine systems[J].Electric Power Construction,2011,32(10):1-9.(In Chinese)
[3]章子华,王振宇,刘国华.风电场脉动风模拟及风机塔架动力响应研究[J].太阳能学报,2011,32(7):992-998.ZHANG Z H,WANG Z Y,LIU G H.Simulation of fluctuating wind in wind farm and dynamic response of wind turbine tower[J].Acta Energiae Solaris Sinica,2011,32(7):992-998.(In Chinese)
[4]QUILLIGAN A,O'CONNOR A,PAKRASHI V.Fragility analysis of steel and concrete wind turbine towers[J].Engineering Structures,2012,36(4):270-282.
[5]AAS-JAKOBSEN K,STR?MMEN E.Time domain buffeting response calculations of slender structures[J].Journal of Wind Engineering and Industrial Aerodynamics,2001,89(5):341-364.
[6]张文福,马昌恒,肖岩.风场模拟中AR模型的若干问题[J].计算力学学报,2009,26(1):124-130.ZHANG W F,MA C H,XIAO Y.Some issues on AR models for wind field simulation[J].Chinese Journal of Computational Mechanics,2009,26(1):124-130.(In Chinese)
[7]徐旭,刘玉.高耸结构在台风作用下的动力响应分析[J].建筑结构,2009,39(6):105-109.XU X,LIU Y.Dynamic response analysis of a high-rising structure under typhoon[J].Building Structure,2009,39(6):105-109.(In Chinese)
[8]邓宗伟,彭文春,高乾丰,等.复杂山地风力机流场及气动性能[J].中南大学学报:自然科学版,2013,44(10):4294-4300.DENG Z W,PENG W C,GAO Q F,et al.Flow field and aerodynamic performance of wind turbine in complex terrain[J].Journal of Central South University:Science and Technology,2013,44(10):4294-4300.(In Chinese)
[9]高乾丰,董辉,邓宗伟,等.大型风力机风雨结构三场耦合分析[J].中南大学学报:自然科学版,2016,47(3):1011-1016.GAO Q F,DONG H,DENG Z W,et al.Three field coupling analysis for large-scale wind turbine with wind-rain-structure[J].Journal of Central South University:Science and Technology,2016,47(3):1011-1016.(In Chinese)
[10]李超,艾丽昆,曲世明,等.透平膨胀机叶轮耦合应力的强度有限元分析[J].流体机械,2012,40(2):15-19.LI C,AI L K,QU S M,et al.Strength analysis based on coupling stress of high-speed rotary turbo expander impeller with finite element method[J].Fluid Machinery,2012,40(2):15-19.(In Chinese)
[11]彭文春,邓宗伟,高乾丰,等.风机塔筒流固耦合分析与受力监测研究[J].工程力学,2015,32(7):136-142.PENG W C,DENG Z W,GAO Q F,et al.Fluid-solid interaction analysis and stress monitoring research of wind turbine tower[J].Engineering Mechanics,2015,32(7):136-142.(In Chinese)
[12]张文礼,张锁怀,王开专,等.应用ANSYS二次开发的塔架应力研究[J].现代制造工程,2008(10):45-49.ZHANG W L,ZHANG S H,WANG K Z,et al.Research on the stress of the tower based on the secondary developing of ANSYS[J].Modern Manufacturing Engineering,2008(10):45-49.(In Chinese)
[13]陈俊岭,阳荣昌,马人乐.基于向量式有限元法的风力发电机组一体化仿真分析[J].湖南大学学报:自然科学版,2016,43(11):141-148.CHEN J L,YANG R C,MA R L.Integrated simulation of wind turbine based on vector form intrinsic finite element[J].Journal of Hunan University:Natural Sciences,2016,43(11):141-148.(In Chinese)
[14]贺广零.考虑土-结构相互作用的风力发电高塔系统地震动力响应分析[J].机械工程学报,2009,45(7):87-94.HE G L.Seismic response analysis of wind turbine tower systems considering soil-structure interaction[J].Journal of Mechanical Engineering,2009,45(7):87-94.(In Chinese)
[15]杜静,冯博,何玉林.风力发电机组塔筒的横向振动分析[J].现代制造工程,2011(9):116-118.DU J,FENG B,HE Y L.Analysis of transverse vibration for wind turbine tower[J].Modern Manufacturing Engineering,2011(9):116-118.(In Chinese)
[16]王振宇,张彪,赵艳,等.台风作用下风力机塔架振动响应研究[J].太阳能学报,2013,34(8):1434-1442.WANG Z Y,ZHANG B,ZHAO Y,et al.Dynamic response of wind turbine under typhoon[J].Acta Energiae Solaris Sinica,2013,34(8):1434-1442.(In Chinese)
[17]孙远,马人乐,邱旭.三边形桅杆杆身风荷载特性风洞试验研究[J].湖南大学学报:自然科学版,2017,44(1):39-46.SUN Y,MA R L,QIU X.Wind tunnel investigation on wind load characteristics of triangular guyed mast[J].Journal of Hunan University:Natural Sciences,2017,44(1):39-46.(In Chinese)