框架-剪力墙偏心结构的MRD减振试验研究

Experiment study on vibration mitigation of frame-shear wall eccentric structure using MRD

为了验证磁流变阻尼器(magnetorheological damper,MRD)对偏心结构在地震作用下的平-扭耦联反应控制的效果,进行了振动台试验.首先利用Matlab/dSPACE综合试验环境建立可精确描述MRD滞回非线性的双sigmoid模型及框架-剪力墙偏心结构试验控制系统的仿真模型.并介绍dSPACE实时仿真平台的优点及其软硬件资源,阐述基于dSPACE系统进行振动控制试验系统开发步骤.采用RCP技术对框架-剪力墙偏心结构模型进行地震反应振动台试验研究,试验结果表明了MRD对偏心结构扭转反应控制的有效性及MRD不同位置的影响.

The double-sigmoid model of magnetorheological damper （MRD） and the experiment system of 3-floor frame-shear wall eccentric structure was built according to the coupled translation and torsion response control of this structural model using MRD, based on Matlab/Simulink software environment and hardware/software resources of dSPACE （digital signal processing and control engineering）. This paper introduces dSPACE real-time simulation platform and its software environment which includes RTI and ControlDesk. It expatiates on the developing steps of control system which based on dSPACE. The shaking table experiment of the structural model was implemented by using rapid control prototyping （RCP） technology. The experimental results show that the coupled translation and torsion response is significantly mitigated, and the location of the MRD has an important effect on the results.