双势阱形式非线性能量阱的减震控制性能研究（英文）

【作者】 陈洋洋； 钱志超； 苏维特； 谭平； 周福霖；

【机构】 广州大学工程抗震研究中心； 广州大学减震控制与结构安全国家重点实验室培育基地；

【摘要】 Nonlinear energy sink (NES) has proven to be very effective in reducing the vibration response of structures. In this paper, a novel bistable nonlinear energy sink (BNES) which composed of a guided moving mass attached with linear springs and permanent magnets is proposed. Both of numerical analysis and shake table experiment are conducted to assess the seismic control performance of the proposed BNES.A shear frame model equipped with the proposed BNES is compared with the same shear frame model equipped with an optimized cubic NES, and with a linear tuned mass damper (TMD) system. The results show that in the idealized situation, where the mass and stiffness is clearly defined (no uncertainty), the BNES can achieve similar performance as a thoroughly in-tuned TMD system. Moreover, in the detuned condition, due to broadband high internal resonance capability, the proposed BNES can outperform the linear TMD and the cubic NES. The study demonstrates that the proposed BNES can be used as an efficient passive vibration absorber for structural seismic control.更多还原

【Abstract】 Nonlinear energy sink(NES) has proven to be very effective in reducing the vibration response of structures. In this paper, a novel bistable nonlinear energy sink(BNES) which composed of a guided moving mass attached with linear springs and permanent magnets is proposed. Both of numerical analysis and shake table experiment are conducted to assess the seismic control performance of the proposed BNES.A shear frame model equipped with the proposed BNES is compared with the same shear frame model equipped with an optimized cubic NES, and with a linear tuned mass damper(TMD) system. The results show that in the idealized situation, where the mass and stiffness is clearly defined(no uncertainty), the BNES can achieve similar performance as a thoroughly in-tuned TMD system. Moreover, in the detuned condition, due to broadband high internal resonance capability, the proposed BNES can outperform the linear TMD and the cubic NES. The study demonstrates that the proposed BNES can be used as an efficient passive vibration absorber for structural seismic control.更多还原