Dynamic testing and numerical analysis of self-resetting floating object isolation system
刘文光 1汤佳铃 1张强 1陈睦锋1
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作者信息
1. 上海大学 力学与工程科学学院,上海 200444
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摘要
提出了一种自复位浮置物隔震系统,该系统采用双层正交导轨隔离水平地震,并通过预拉弹簧绳实现自复位.考虑系统摩擦与弹簧绳刚度,建立了自复位浮置物隔震系统的理论模型,完成了不同工况下的隔震系统振动台试验,结果表明输入地震波的加速度峰值越高,隔震系统的隔震率也会相应提升.在输入地震波加速度峰值为 0.15、0.2、0.4、0.62 g 时,隔震系统平均隔震率分别为50%、58%、75%、82%.在相同峰值的地震波及楼面波地震动输入下,隔震系统均具有良好的隔震效果且能够实现系统自复位.最后建立了浮置物隔震支座-浮置物体系的有限元模型,验证了隔震系统理论模型的有效性.
Abstract
A self-resetting floating object isolation system is proposed,which utilizes a dual-layer orthogonal guide to isolate horizontal seismic forces and achieves self-resetting through pre-tensioned spring ropes.Taking into account system friction and spring rope stiffness,a theoretical model of the self-resetting floating object isolation system is established.Vibration table tests of the isolation system under different operating conditions were conducted,and the results indicate that as the peak acceleration of the input seismic wave increases,the isolation efficiency of the system also increases accordingly.For input seismic wave peak accelerations of 0.15 g,0.2 g,0.4 g,and 0.62 g,the average isolation efficiencies of the isolation system are 50%,58%,75%,and 82%,respectively.Under the input of seismic waves with the same peak value and floor motion-induced seismic excitations,the isolation system demonstrates good isolation effectiveness and is capable of achieving self-resetting.Finally,a finite element model of the floating object isolation bearing-floating object system is established to validate the effectiveness of the theoretical model of the isolation system.
关键词
设备隔震支座/水平隔震/振动台试验/有限元分析
Key words
equipment vibration isolation bearings/horizontal vibration isolation/shaking table tests/finite element analysis
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