振动台混合试验平台的验证性研究
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摘要
振动台混合试验方法将结构关键部分作为试验子结构在振动台上加载,结构其余部分在计算机中进行数值计算。这种试验方法比传统振动台试验成本更低,也能够进行结构的足尺试验。为搭建振动台混合试验平台,研制了剪切力测量装置。采用压差反馈控制来增加振动台系统的液压阻尼比,提高台面加速度响应质量。试验结果表明合理的压差增益可以明显地削弱加速度响应中的油柱共振引起的加速度噪声。将纯质量块作为试验子结构,采用正弦波激励对一个单自由度结构进行振动台混合试验。试验结果与精确计算的结果基本吻合,验证了这种方法的可行性,也验证了振动台混合试验平台的性能。
Shaking table hybrid test method takes the structure specimen as experimental substructure loaded by shaking table,with the remainder substructures calculated by computer.This method can make full size test,and has lower cost than the traditional shaking table test.In order to construct the platform of shaking table hybrid test system,the shear force measure device was developed.The pressure difference feedback control was used to increase the hydraulic damping ratio of shaking table system,which improves the accuracy of acceleration response.The experimental results demonstrated that the reasonable pressure difference gain can significantly eliminate the noise in acceleration response caused by oil-column resonance.The shaking table hybrid test of SDOF structure was conducted with the sinusoidal signal as input and the pure mass as a physical substructure.The experimental results essentially consistent with the numerical solution,which prove the feasibility of the shaking table hybrid test and good performance of this test system.
Shaking table hybrid test method takes the structure specimen as experimental substructure loaded by shaking table,with the remainder substructures calculated by computer.This method can make full size test,and has lower cost than the traditional shaking table test.In order to construct the platform of shaking table hybrid test system,the shear force measure device was developed.The pressure difference feedback control was used to increase the hydraulic damping ratio of shaking table system,which improves the accuracy of acceleration response.The experimental results demonstrated that the reasonable pressure difference gain can significantly eliminate the noise in acceleration response caused by oil-column resonance.The shaking table hybrid test of SDOF structure was conducted with the sinusoidal signal as input and the pure mass as a physical substructure.The experimental results essentially consistent with the numerical solution,which prove the feasibility of the shaking table hybrid test and good performance of this test system.
引文
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[2]袁涌,熊世树,朱宏平.加载速率对速度控制型实时子结构拟动力试验结果的影响[J].东南大学学报(自然科学版),2008,38(5):784—787.Yuan Y,Xiong S,Zhu H.Effect of loading ratio on results of real-time substructure hybrid experiment based on velocity control[J].Journal of Southeast University(Natural Science Edition),2008,38(5):784—787.
[3]李进,王焕定,张永山,等.高阶单步实时动力混合试验技术研究[J].地震工程与工程振动,2005,25(1):97—101.Li Jin,Wang Huanding,Zhang Yongshan,et al.The research of a high order single step method for realtime substructure testing[J].Earthquake Engineering and Engineering Vibration,2005,25(1):97—101.
[4]Chi F D,Wang J T,Jin F.Delay-dependent stability and added damping of SDOF real-time dynamic hybrid testing[J].Earthquake Engineering and Engineering Vibration,2010,9(3):425—438.
[5]Horiuchi T,Inoue M,Konno T.Development of realtime hybrid experimental system using a shaking table[A].Proc.12th World Conference on Earthquake Engineering[C],Auckland,New Zealand,2000:1—8.
[6]Igarashi A,Iemura H,Tanaka H.Development of substructure hybrid shake table test method and application to verification tests of vibration control devices[A].China-Japan Workshop Vibration Control and Health Monitoring of Substructures and Third Chinese Symposium on Structural Vibration Control[C],Shanghai,China,2002:1—10.
[7]Lee S K,Park E C,Min K W,et al.Real-time hybrid shaking table testing method for the performance evaluation of a tuned liquid damper controlling seismic response of building structures[J].Journal of Sound and Vibration,2007,302:596—612.
[8]Wu B,Deng L X,Yang X D.Stability of central difference method for dynamic real-time substructure testing[J].Earthquake Engineering and Structural Dynamics,2009,38:1 649—1 663.
[9]Neild S A,Stoten D P,Drury D,et al.Control issues relating to real-time substructuring experiments using a shaking table[J].Earthquake Engineering and Structural Dynamics,2005,34(9):1 171—1 192.
[10]邱法维.电液伺服地震模拟振动台模拟控制系统理论分析[J].哈尔滨建筑工程学院学报,1989,22(3):100—111.Qiu Fawei.Theoretic study of the electronic-hydraulic servo analogue control system for earthquake simulation shaking table[J].Journal of Harbin Architecture&Civil Engineering Institute,1989,22(3):100—111.
[11]潘景龙.单向模拟地震振动台设计中的若干问题讨论[J].哈尔滨建筑工程学院学报,1990,23(2):90—99.Pan Jinglong.Discussion on a number of problems in design of the unidirectional shaking table[J].Journal of Harbin Architecture&Civil Engineering Institute,1990,23(2):90—99.
[12]周惠蒙,吴斌.TLD振动台混合试验的数值仿真分析[J].震灾防御技术.2010,5(1):9—19.Zhou Huimeng,Wu Bin.Numerical simulation of substructure shaking table test with tuned liquid damper[J].Technology for Earthquake Disaster Prevention,2010,5(1):9—19.
[13]韩俊伟,聂伯勋,于丽明,等.带压差反馈的电液伺服系统三参数自适应控制器设计[J].哈尔滨工业大学学报,1997,29(6):66—68.Han Junwei,Nie Boxun,Yu Liming,et al.Design of three-parameter adaptive control ler of an electrohydraulic servo system with pressure difference component(PDC)[J]Journal of Harbin Institute of Technology,1997,29(6):66—68.
[14]Jung R Y,Shing P B,Stauffer E,et al.Performance of a real-time pseudodynamic test system considering nonlinear structural response[J].Earthquake Enegineering and Structural Dyanmics,2007,36:1 785—1 809.
[15]MTS.Model 793.00 System Software[M].2001:151—195.
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