一种NES与TMD的混合控制方案研究

ANALYSIS OF A HYBRID SCHEME COMPRISED OF NONLINERA ENERGY SINK AND TUNED MASS DAMPER

  • 摘要: 提出了一种非线性能量阱(NES)与调谐质量阻尼器(TMD)混合控制结构振动的方案,结合复变量平均法推得了慢变系统方程,并利用多尺度分析得到了理论能量预测方程。能量方程表明混合系统中主结构与非线性能量阱的能量呈三次方关系,而与调谐质量阻尼器的能量为线性关系。数值仿真表明混合系统中非线性能量阱可较快出现靶能量传递现象,而且整个系统具有较高的耗能效率;数值计算的能量分布曲线围绕理论能量预测曲线变动,证实了理论分析的正确性;混合系统具有良好的鲁棒性,不仅拓宽了频带,而且降低了对初始能量的敏感性。

     

    Abstract: An hybrid scheme comprised of Nonlinear Energy Sinks (NES) and Tuned Mass Damper(TMD) is proposed to suppress the vibration of the structure. The equation of slow dynamics system and the analytical energy prediction equation are formulated using the complex-averaging method and the multi-scale method. The derived energy equation shows cubic function relationship in the energy between main structure and NES, and linear relationship between TMD and main structure. The numerical simulation indicates that the phenomenon of targeted energy transfer can be produced quickly in NES of the hybrid system, and high energy consumption rate is achieved in the whole system compared with the pure NES control; It is also demonstrated that theoretical analysis is correct since the curves of numerical calculations vary around the analytical prediction values; Besides, not only wide frequency band but also low sensitivity can be obtained by the hybrid scheme because of its good robustness.

     

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