Tuned mass dampers are well-known devices for efficient reduction of structural vibrations; however, they can only control the vibration of a single mode in a narrow frequency range and are not easily retunable. This article presents a semi-active tuned mass damper, consisting of a piezoelectric device connected to an external resistive–inductive electric circuit, which enables multi-modal vibration control, is highly tunable, and introduces high damping. The dynamics of the coupled electromechanical system, which includes the primary and auxiliary masses, the piezoelectric device, and the shunt circuit, are analyzed and the effect of the resistance and inductance is investigated. An experimental prototype using a specialty piezoelectric device is fabricated and tested. The experimental measurements greatly agree with the analytical results, validating the strong electromechanical coupling and the enhanced vibration suppression capabilities of the proposed damper. Moreover, the variation of inductive impedance demonstrates substantial semi-active broadband multi-modal vibration control potential, by introducing an additional highly tunable electromechanical resonant oscillator in the system dynamics, and also by enabling the enhancement of coupling and energy dissipation on targeted modal frequencies.

调谐质量阻尼器是众所周知的有效减少结构振动的装置。然而，它们只能在较窄的频率范围内控制单模的振动，并且不易重新调谐。本文介绍了一种半主动调谐质量阻尼器，由连接到外部电阻-电感电路的压电装置组成，可实现多模态振动控制，高度可调，并引入了高阻尼。分析了包括初级和辅助质量、压电器件和分流电路的耦合机电系统的动力学，并研究了电阻和电感的影响。制造并测试了使用特殊压电设备的实验原型。实验测量与分析结果非常吻合，验证了所提出的阻尼器的强机电耦合和增强的振动抑制能力。此外，通过在系统动力学中引入额外的高度可调的机电谐振振荡器，以及通过增强目标模态频率上的耦合和能量耗散，电感阻抗的变化展示了显着的半主动宽带多模态振动控制潜力。