Improving the ability of nonlinear energy sink (NES) to suppress large vibrations under strong excitation has been widely concerned. Moreover, distributing NES to suppress multimodal resonances is also an issue that deserves more attention. This paper investigates the distribution strategy of the series NES in suppressing the vibration of a two-degree-of-freedom (2-DOF) system. Dynamic models are developed for two strategies: centralized and distributed series NES. The vibration reduction efficiency of these strategies is compared, and the approximate results obtained from the analytical analysis were verified using numerical methods. The research results indicate that distributing the series NES among different vibration sources can lead to improved vibration reduction performance. Moreover, the distributed vibration reduction strategy exhibits greater adaptability to different modes of primary system. Furthermore, while keeping the total additional weight of the NES unchanged, the effects of the series NES and 1DOF NES on vibration control were compared. The results demonstrate that, under large amplitude excitation, the series NES has a better vibration reduction effect than the 1DOF NES when using distributed NES to control the vibration of a 2-DOF system. Additionally, by studying the energy transfer between NES oscillators in series, the series NES with high stiffness asymmetry exhibits superior vibration reduction. The findings of this study contribute to the advancement of research on the NES control of strong excitation vibration and multi-mode structure vibration.

提高非线性吸能器（NES）在强激励下抑制大振动的能力受到广泛关注。此外，分布NES来抑制多模态共振也是一个值得更多关注的问题。本文研究了 NES 系列在抑制二自由度 (2-DOF) 系统振动方面的分布策略。动态模型针对两种策略而开发：集中式和分布式系列 NES。比较了这些策略的减振效率，并使用数值方法验证了解析分析获得的近似结果。研究结果表明，将NES系列分布在不同的振动源之间可以提高减振性能。此外，分布式减振策略对主系统的不同模式表现出更大的适应性。此外，在保持NES总附加重量不变的情况下，比较了系列NES和1DOF NES的振动控制效果。结果表明，在大振幅激励下，采用分布式NES控制2自由度系统振动时，串联NES比1DOF NES具有更好的减振效果。此外，通过研究串联 NES 振荡器之间的能量传递，具有高刚度不对称性的串联 NES 表现出卓越的减振性能。本研究成果有助于推动强激励振动和多模态结构振动的NES控制研究的进展。