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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Numerical and experimental study of the performance of a single-sided vibro-impact track nonlinear energy sink
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Numerical and experimental study of the performance of a single-sided vibro-impact track nonlinear energy sink

机译：单侧振动冲击轨道非线性能量沉性能的数值和实验研究

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This paper proposes a single-sided vibro-impact track nonlinear energy sink (SSVI track NES) as an effective way to mitigate the effects of impulsive and seismic excitation on building structures. The SSVI track NES is a passive energy dissipation device, which consists of a mass moving along a track, the shape of which provides a nonlinear restoring force to the mass. Previous studies have analyzed the track NES, which considers the track shape to be smooth and symmetric. By introducing a discontinuity into the shape of the track (e.g., through impact), energy in the primary structure can be scattered to higher frequency responses where it can be dissipated at a faster rate. First, the SSVI track NES is analytically investigated and numerically optimized base on a two degree-of-freedom primary structure. The results of numerical simulations show that the SSVI track NES can be more efficient than both the track NES and tuned mass damper in reducing the response of the primary structure. Based on the analytical studies, the SSVI track NES is experimentally realized and investigated when subjected to both impulse-like and seismic excitations, confirming the numerical predictions and validating the analytical model of the device. Finally, the robustness of the SSVI track NES is investigated numerically. The results of this investigation indicate that the SSVI track NES remains effective over a broad range of input excitation energy levels, as well as during significant changes in the stiffness of the primary structure. Copyright (c) 2015 John Wiley & Sons, Ltd.
机译：本文提出了一种单侧振动冲击轨道非线性能量汇（SSVI轨道NES），作为减轻冲击和地震激励对建筑结构影响的有效方法。 SSVI轨道NES是一种被动能量消散设备，它由沿着轨道运动的质量组成，轨道的形状为质量提供了非线性的恢复力。先前的研究已经分析了轨道NES，后者认为轨道形状是平滑且对称的。通过将不连续性引入轨道的形状中（例如，通过冲击），初级结构中的能量可以被散射到较高的频率响应，在该处可以以更快的速率消散它。首先，基于两个自由度的主要结构，对SSVI轨道NES进行了分析研究和数值优化。数值模拟结果表明，SSVI轨道NES可以比轨道NES和调谐质量阻尼器更有效地减少初级结构的响应。在分析研究的基础上，SSVI轨道NES在受到脉冲和地震激励的情况下均通过实验实现并进行了研究，从而确定了数值预测并验证了设备的分析模型。最后，对SSVI轨道NES的鲁棒性进行了数值研究。这项研究的结果表明，SSVI轨道NES在宽范围的输入激发能级以及一级结构刚度的显着变化期间仍然有效。版权所有（c）2015 John Wiley＆Sons，Ltd.

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