Smart viscoelastic damper based on electrorheological elastomers
Electrorheological elastomers(EREs)present electric field controlled dynamic viscoelasticity.The storage modulus,loss modulus and damping factors can be changed reversibly and fast by applying different electric fields.Sucn an unique property makes them have the potential to be widely used as vibration attenuation devices or noise reduction devices in spacecraft,aircrafts,vehicles,machines,and buildings et al.However,to the best our knowledge,their applications as viscoelastic dampers have not been reported.In this study,an anisotropic ERE with TiO2/urea particles dispersing within silicone rubber was prepared and tested under various conditions.Based on the experimental data,a revised Bouc-Wen phenomenological model was established,which can accurately describe and predict the viscoelastic properties of the ER elastomers within low frequency.Subsequently,a smart viscoelastic damper based on the ER elastomers was fabricated.Its force-displacement hysteresis loops under various loading conditions was obtained by experimental,as shown in figure 1.Figure 2 shows the force-displacement hysteresis loops obtained under different electric field strength at 0.5 Hz and 0.7 mm amplitude.As the electric field rises,the stiffness of the damper increases while the energy dissipation capacity decreases.It indicates the stiffness and energy dissipation capacity of the smart viscoelastic dampers can be reversibly tuned by applying electric field.Therefore,the smart viscoelastic dampers can adaptively reduce the vibration response of structures according to their different in-put vibrations.
Ning Ma Xufeng Dong Ziqi Zhang Chenguang Niu Qi Wang
Dalian University of Technology,Dalian 116024,China
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
2643-2644
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）