Nonlinear damping model of a RECD and its structural seismic response mitigation analysis
CUI Kaiqiang1,2,WANG Zhihao1,CHENG Zhipeng1,CHEN Aijiu1,HUO Hongyuan1,ZHOU Yuxiang1
1. School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450045, China;
2. Steel Structure Engineering Company of China Construction Eighth Engineering Division Co., Ltd., Shanghai 200125, China
Abstract:To reveal the nonlinear damping characteristics of a rotary eddy-current damper (RECD), and investigate the effect of nonlinear damping characteristics of the RECD on mitigating structural seismic response, the finite element simulation on eddy-current damping, mechanical performance tests, mechanical model identification of the RECD, as well as its structural seismic response mitigation analysis was carried out. An eddy-current damping mechanical model of the RECD was established, through mechanical performance test of the prototype and electromagnetic finite element simulation analysis of eddy current damping. Subsequently, seismic response mitigation of the single-degree-of-freedom structure with the RECD was numerically investigated. Finally, vibration control performance between the linear viscous damper and the RECD was compared. The results show that the eddy-current damping has obvious nonlinear properties with the increase of the velocity, and the nonlinear mechanical model based on the magic formula can accurately describe the mechanical property of eddy current damping of RECD. Compared with conventional VD, the RECD has a better seismic response mitigation effect on the single-degree-of-freedom structure.
Key words: vibration control; eddy-current damper; nonlinear damping; magic formula; structural seismic response mitigation
崔凯强1,2,汪志昊1,程志鹏1,陈爱玖1,霍洪媛1,周宇翔1. 旋转式电涡流阻尼器阻尼非线性模型及其结构减震分析[J]. 振动与冲击, 2022, 41(18): 134-142.
CUI Kaiqiang1,2,WANG Zhihao1,CHENG Zhipeng1,CHEN Aijiu1,HUO Hongyuan1,ZHOU Yuxiang1. Nonlinear damping model of a RECD and its structural seismic response mitigation analysis. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(18): 134-142.
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