考虑橡胶垫减振的灯泡贯流泵房非线性振动分析
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摘要
针对南水北调东线工程大型灯泡贯流泵房的振动问题,首次提出采用橡胶垫减振的振动控制措施。采用Bouc-Wen微分型恢复力模型模拟橡胶垫的非线性滞回特性,利用MATLAB中的SIMULINK工具进行仿真分析,设计橡胶垫的数量和布置方式。在方案确定后,采用三维有限元方法,对淮阴三站泵房进行非线性动力时程分析,并将采用和不采用控制措施的泵房动力响应进行比较,可以得出,采用橡胶垫减振措施后,泵房的动力响应有明显的降低,降幅均在50%以上,说明该措施是可行的,这对灯泡贯流泵房的抗振设计有着重要的意义。
In this paper,a measure of rubber buffers vibration damping is proposed for the first time to be applied to the vibration control of large-scale bulb tubular pump-house in the eastern route of South-to-North Water Transfer Project.The hysteretic characteristics of the rubber buffer are simulated with a Bouc-Wen hysteretic model,and the number and arrangement of rubber buffers are determined through a simulation analysis based on SIMULINK of MATLAB.After the design of vibration damping,a nonlinear dynamic time-history analysis of the pump-house of Huaiyin third pumping station is conducted by using a three-dimensional finite element method.The dynamic responses of pump-house of whether or not adaopting rubber buffers are compared,and the results show that the dynamic responses of pump-house adopting the damping measure are significantly reduced by over 50%.This indicates that the technique of rubber buffers vibration damping is efficient and that it is very important to anti-vibration design of bulb tubular pump-house.
In this paper,a measure of rubber buffers vibration damping is proposed for the first time to be applied to the vibration control of large-scale bulb tubular pump-house in the eastern route of South-to-North Water Transfer Project.The hysteretic characteristics of the rubber buffer are simulated with a Bouc-Wen hysteretic model,and the number and arrangement of rubber buffers are determined through a simulation analysis based on SIMULINK of MATLAB.After the design of vibration damping,a nonlinear dynamic time-history analysis of the pump-house of Huaiyin third pumping station is conducted by using a three-dimensional finite element method.The dynamic responses of pump-house of whether or not adaopting rubber buffers are compared,and the results show that the dynamic responses of pump-house adopting the damping measure are significantly reduced by over 50%.This indicates that the technique of rubber buffers vibration damping is efficient and that it is very important to anti-vibration design of bulb tubular pump-house.
引文
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[2]刘胜柱,郭鹏程,张乐福,等.岩滩水电站3号机减振改造研究[J].水力发电学报,2005,24(5):104～109.LIU Shengzhu,GUO Pengcheng,ZHANG Lefu,et al.Research on decreasing vibration of turbine unit No.3 in Yantan water powerplant[J].Journal of Hydroelectric Engineering,2005,24(5):104～109.(in Chinese).
[3]Abdel-Rahman S M,Helal M A,Nasser M A.Vibration Problems of Axial Flow Pump[C].Proceedings of the International ModalAnalysis Conference,2000,V1:891～898.
[4]Awasthi J P.Vibration Problem of Large Capacity Pumps-A Case Study[J].Journal of Indian Water Works Association,1987,19(4):287～294.
[5]郑建国,姚志远,孙培林.水泵房噪声综合治理[J].噪声与振动控制,1998,(3):29～35.ZHENG Jianguo,YAO Zhiyuan,SUN Peilin.Synthetic Control on Yawp in Water Pump Room of One Power Plant[J].Noise andvibration control,1998,(3):29～35.(in Chinese).
[6]张宝军,张弛.水泵噪声声源的控制与防护[J].噪声与振动控制,2000,(2):39～40.ZHANG Baojun,ZHANG Chi.Control and protection for the noise source of pump[J].Noise and vibration control,2000,(2):39～40.(in Chinese).
[7]陈水生,万益春,野田尚昭.隔震桥梁地震响应非线性分析[J].长安大学学报,2006,26(1):54～58.CHEN Shuisheng,WAN Yichun,NAO-Aki Noda.Nonlinear response of isolated-bridge subjected to seismic excitation[J].Journalof Chang-an University,2006,26(1):54～58.(in Chinese).
[8]刘云贺,陈厚群.大型渡槽铅销橡胶支座减震机理的数值模拟[J].水利学报,2003,(12):98～103.LIU Yunhe,CHEN Houqun.A seismic effect of lead rubber bearing for large scaled aqueduct[J].Journal of HydraulicEngineering,2003,(12):98～103.(in Chinese).
[9]Bouc R.Forced vibration of mechanical system with hysteresis[A].Johnson,Bob.Proceedings 4th Conference on NonlinearIsolation[C].Czechoslovakia Prage,1976.186～197.
[10]薛定宇.控制系统计算机辅助设计——MATLAB语言与应用[M].北京:清华大学出版社,2006.XUE Dingyun.Computer aided control system design using MATLAB language[M].Beijing:Tsinghua University Press.2006.(inChinese).
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