Vibration absorbers can absorb vibration energy and reduce the vibration amplitude of the primary system. With adaptive tuning, an adaptively tuned vibration absorber (ATVA) can track the dominant frequency of the external excitation, and reduce the vibration response amplitude of the primary system under variable-frequency external excitation. To realize the optimal vibration reduction performance, the 100% frequency tracking scheme of the adaptively tuned absorber must be optimized. In this regard, a dynamic model of an undamped primary system and a vibration absorber is established based on vibration absorption theory, and alternative tuning schemes for these absorbers are investigated in this paper. Using ATVA with the 100% frequency tracking scheme as a reference, a frequency tracking scheme is optimized by the segmented intercept optimization method. This optimization method continuously tunes the ratio of the absorber natural frequency and external excitation frequency to minimize the response in the variable-frequency vibration regions. Hilbert-Huang transform (HHT) time-frequency analysis is performed on the vibration response to reveal the vibration reduction mechanism of the improved vibration absorber. The vibration reduction effects are verified by comprehensive analysis results and experimental results.

减振器可以吸收振动能量，降低一次系统的振幅。通过自适应调谐，自适应调谐减振器 (ATVA) 可以跟踪外部激励的主频率，并降低主系统在变频外部激励下的振动响应幅度。为了实现最佳的减振性能，必须优化自适应调谐减振器的 100% 频率跟踪方案。在这方面，基于吸振理论建立了无阻尼主系统和吸振器的动力学模型，并在本文中研究了这些吸振器的替代调谐方案。使用具有 100% 频率跟踪方案的 ATVA 作为参考，通过分段截距优化方法优化频率跟踪方案。这种优化方法不断调整减振器固有频率和外部激励频率的比率，以最大限度地减少变频振动区域的响应。对振动响应进行 Hilbert-Huang 变换 (HHT) 时频分析，揭示改进型吸振器的减振机理。综合分析结果和实验结果验证了减振效果。对振动响应进行 Hilbert-Huang 变换 (HHT) 时频分析，揭示改进型吸振器的减振机理。综合分析结果和实验结果验证了减振效果。对振动响应进行 Hilbert-Huang 变换 (HHT) 时频分析，揭示改进型吸振器的减振机理。综合分析结果和实验结果验证了减振效果。