Vibration mitigation is essential to many dynamical and engineering structures that are subjected to destructive vibration amplitudes induced by impulsive loading, seismic excitation, blasts, flutter, collisions, fluid–structure interaction and so on. Unprotected structures by vibration absorbers could be exposed to failure which lead to enormous losses in human lives, major equipment and economy. Employing the nonlinear targeted energy transfer (TET) concept in nonlinear vibration absorbers which are later called as nonlinear energy sinks has ignited a very rapid research interest since 2001. Up-to-date, considerable growth in the NESs field has taken place. Accordingly, various types of NESs have been introduced for vibration mitigation in variety of dynamical and structural engineering systems. The types of introduced NESs included, but not limited to, stiffness-based, rotating and the vibro-impact NESs. Among these common types of NESs, the most effective and efficient one is the single-sided vibro-impact (SSVI) nonlinear energy sink (NES). However, most of investigations has implemented a coefficient of restitution of 0.7 which closely corresponds to a steel-to-steel impact. Therefore, this paper is aimed to further improve the SSVI NES by including the coefficient of restitution in the performance optimization. Accordingly, significant improvement in the SSVI NES performance is obtained when the coefficient of restitution is found to be near 0.45. In addition, performance comparison between the enhanced SSVIe NES with several existing types of NESs is performed here where a nine-story large-scale structure is employed for this numerical comparison. Accordingly, the performance of the enhanced SSVIe NES of nearly 0.45 coefficient of restitution is found to be more robust to the initial impulsive energy levels and to its physical parameters variation than other kinds of existing NESs.

中文翻译：

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改进的振动冲击非线性能量汇与其他类型的 NES 的比较

对于许多动力和工程结构来说，减振是必不可少的，这些结构受到冲击载荷、地震激发、爆炸、颤振、碰撞、流固耦合等引起的破坏性振动幅度的影响。不受减振器保护的结构可能会发生故障，从而导致人员生命、主要设备和经济方面的巨大损失。自 2001 年以来，在非线性减振器（后来称为非线性能量汇）中采用非线性目标能量转移 (TET) 概念引起了非常迅速的研究兴趣。迄今为止，NES 领域已经取得了长足的发展。因此，已经在各种动力和结构工程系统中引入了各种类型的 NES 来减轻振动。引入的 NES 类型包括，但不限于，基于刚度的、旋转的和振动冲击的 NES。在这些常见的 NES 类型中，最有效和最高效的一种是单侧振动冲击 (SSVI) 非线性能量汇 (NES)。然而，大多数调查实施了 0.7 的恢复系数，这与钢对钢的影响密切相关。因此，本文旨在通过在性能优化中包含恢复系数来进一步改进 SSVI NES。因此，当发现恢复系数接近 0.45 时，获得了 SSVI NES 性能的显着改善。此外，这里还进行了增强型 SSVIe NES 与几种现有类型 NES 之间的性能比较，其中采用九层大型结构进行此数值比较。因此，