高耸钢烟囱环形TLD减振试验设计与模型修正
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摘要
针对高耸结构环形调谐液体阻尼器减振试验的设计与模型修正展开研究。以某真实高耸钢烟囱结构为原型,采用欠人工质量模型理论设计了动力试验模型,进而建立了集中质量模型和有限元模型进行动力特性分析,并与实际结构进行了对比,从而验证了试验模型的合理性。通过自由衰减试验,测得试验模型的频率和阻尼比,并针对试验中采用的无线加速度传感器,讨论其在高耸结构动力测试中的适用性。建立了基于遗传算法的模型修正方法,在试验数据的基础上,以结构刚度和基底转动刚度为变量,以真实结构静动力特性为目标,通过编制程序开展了数值模拟研究。研究结果表明:所设计的试验模型满足相似比关系,并且能够在一定程度上反映真实结构的动力行为;基于遗传算法的模型修正方法,仅需50代遗传计算即能收敛,是一种高效的数值模型修正方法。研究为进一步开展高耸钢烟囱环形调谐液体阻尼器减振试验提供了试验模型和数值模型。
Both experiment design and numerical model updating for high-rise structure with ring shaped tuned liquid damper( TLD) are investigated in this paper. According to a real high-rise structure,a scaled model structure for the dynamic experiment was designed,using the similitude law of the structural mode lacking artificial mass. Both the lumped mass model and finite element model of the scaled structure were established,and its dynamic characteristics were compared with the real structure,so as to validate the rationality of the scaled model. The frequency and damping ratio of the scaled model were obtained from free damping experiment. Also,the applicability of wireless sensor in the dynamic test of high-rise structures was discussed using the experimental data. A model updating method using genetic algorithm was proposed and programmed,then a numerical simulation was conducted using structural stiffness and base rotational stiffness as variables to study both static and dynamic characteristics. The results show that the designed model can meet the similitude and reflect the dynamic behavior of the real structure in some degree. And the proposed method is a numerical model updating method with high efficiency,as it can converge within only 50 iterations. The work may offer both experimental and numerical models for the further investigations of vibration control experiment of the high-rise steel chimney with ring shaped TLD.
引文
[1]石启印,李爱群,李培彬,等.北京机场新塔台结构风洞试验研究[J].土木工程学报,2004,37(8):28-32.(SHI Qiyin,LI Aiqun,LI Peibin,et al.Wind tunnel tests study on the new tall tower structure model of Beijing Airport[J].China Civil Engineering Journal,2004,37(8):28-32.(in Chinese))
    [2]陈健云,周晶,马恒春,等.高耸烟囱结构竖向地震响应的模型试验研究及分析[J].建筑结构学报,2005,26(2):87-93.(CHEN Jianyun,ZHOU Jing,MA Hengchun,et al.Study on model test of highrise chimney subjected to vertical seismic action[J].Journal of Building Structures,2005,26(2):87-93.(in Chinese))
    [3]周晅毅,顾明,马文勇,等.复杂多塔结构风致响应研究[J].振动工程学报,2008,21(4):349-353.(ZHOU Xuanyi,GU Ming,MA Wenyong,et al.Wind-induced responses of multi-tower structure[J].Journal of Vibration Engineering,2008,21(4):349-353.(in Chinese))
    [4]钱稼茹,Warnitchai P,丁雄.用TLD减小电视塔动力反应的振动台试验研究[J].建筑结构学报,1995,16(5):32-39.(QIAN Jiaru,Warnitchai P,DING Xiong.Shaking table experiment study on the suppression dynamic response of a TV tower with TLD[J].Journal of Building Structures,1995,16(5):32-39.(in Chinese))
    [5]瞿伟廉,李秋胜,宋波,等.圆环形深水TLD对电视塔风振反应控制的试验与研究[J].特种结构,1995,12(3):47-50.(QU Weilian,LI Qiusheng,SONG Bo,et al.Experiment and research for controlling wind vibration responses of TV tower with ring-shape deep water TLD[J].Special Structures,1995,12(3):47-50.(in Chinese))
    [6]Pr Tranvik,Gran Alpsten.Dynamic behaviour under wind loading of a 90m steel chimney[R/OL].Vxj:Alstom Power Sweden AB,2002[2014-02-28].http://www.stbk.se/S01041-Report.pdf.
    [7]陈鑫.高耸钢烟囱风振控制理论与试验研究[D].南京:东南大学,2012.(CHEN Xin.Theoretical and experimental study on vibration control of high-rise steel chimneys under wind load[D].Nanjing:Southeast University,2012.(in Chinese))
    [8]陈鑫,李爱群,程文瀼,等.基于Adomian分解和回归分析的高耸钢烟囱动力特性研究(Ⅰ):模态频率[J].土木工程学报,2013,46(4):26-35.(CHEN Xin,LI Aiqun,CHENG Wenrang,et al.Study on dynamic characteristics of high-rise steel chimneys based on Adomian decomposition method and regression analysis(Ⅰ):modal frequency[J].China Civil Engineering Journal,2013,46(4):26-35.(in Chinese))
    [9]Rice Jennifer A,Spencer B F.Structural health monitoring sensor development for the Imote2 platform[C]//Tomizuka Masayoshi.Sensors and Smart Structures Technologies for Civil,Mechanical,and Aerospace Systems2008.San Diego,California,USA:Society of PhotoOptical Instrumentation Engineers,2008.
    [10]Lu Y,Tu Z G.Dynamic model updating using a combined genetic-eigen sensitivity algorithm and application in seismic response prediction[J].Earthquake Engineering&Structural Dynamics,2005,34(9):1149-1170.

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