A magnetic Bi-stable nonlinear energy sink for structural seismic control

被引：55
|
作者：
Chen, Yang-Yang [1 ,2 ]
Qian, Zhi-Chao [1 ,2 ]
Zhao, Wei [3 ]
Chang, Chia-Ming [4 ]
机构：
[1] Guangzhou Univ, Earthquake Engn Res & Test Ctr, MOE Key Lab Earthquake Resistance Earthquake Miti, Guangzhou 510405, Peoples R China
[2] Guangzhou Univ, Guangdong Prov Key Lab Earthquake Engn & Appl Tec, Guangzhou 510405, Peoples R China
[3] Jinan Univ, Sch Mech & Construct Engn, MOE Key Lab Disaster Forecast & Control Engn, Guangzhou 510632, Peoples R China
[4] Taiwan Natl Univ, Dept Civil Engn, Taipei 10617, Taiwan
来源：
JOURNAL OF SOUND AND VIBRATION | 2020年 / 473卷 / 473期
关键词：
Nonlinear energy sink; Magnetic force; Transient internal resonance; Targeted energy transfer; Seismic control; MECHANICAL OSCILLATORS; SHEAR FRAME; SYSTEM; MITIGATION; DYNAMICS; ATTENUATION; TRANSFERS; PENDULUM;
D O I：
10.1016/j.jsv.2020.115233
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
In this paper, a magnetic bi-stable NES (MNES) is proposed for structural seismic control. Permanent magnets are configured to generate noncontact and smooth bi-stable restoring force for the present MNES device, by which the transient internal resonance between the primary structure and the attached MNES can be rapidly enhanced under seismic excitation. The governing equation of the present MNES is derived, and the numerical parameter optimization is carried out for its implementation in seismic control for a shear frame model. Seismic performance of this frame structure attached with the proposed MNES is evaluated, and compared to those of cubic NES and linear tuned mass damper (TMD) systems. As shown in the results, the proposed MNES is found to be robustly capable of protecting the shear frame under seismic excitations. Immediate cascade of broadband transient internal resonance captures under seismic excitations are found as the essential cause of the high efficiency of the present MNES system. (C) 2020 Elsevier Ltd. All rights reserved.
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页数：17
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