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A theoretical study of a smart electromechanical tuned mass damper beam device

机译：智能机电调谐质量阻尼梁装置的理论研究

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摘要

Research into piezoelectric vibration energy harvesting (PVEH) beams has so far largely overlooked the fact that these are, in many practical applications, mechanical absorbers of the vibration of the structure to which they are attached. This paper introduces the novel concept of utilizing a PVEH beam as a tuned mass damper (TMD) - which suppresses a particular vibration mode of a generic host structure over a broad band of excitation frequencies. This device comprises a pair of bimorphs shunted by resistor-capacitor-inductor circuitry. The optimal damping required by this TMD is generated by the PVEH effect of the bimorphs. The theoretical basis of this dual PVEH/TMD beam device is presented and verified by alternative analytical methods. The simulation results demonstrate that the ideal degree of vibration attenuation can be achieved through appropriate tuning of the circuitry for a device whose effective mass is less than 2% of the equivalent modal mass of the host structure. The proposed dual PVEH/TMD beam device combines the relative advantages of the classical (mechanical) TMD and the shunted piezoelectric patch (electrical vibration absorber), presenting the prospect of a functionally more readily adaptable class of electromechanical tuned vibration absorbers.
机译：迄今为止，对压电振动能量收集（PVEH）梁的研究在很大程度上忽略了以下事实：在许多实际应用中，这些梁是其所附着结构的振动的机械吸收器。本文介绍了利用PVEH光束作为调谐质量阻尼器（TMD）的新颖概念-它抑制了宽带频率范围内通用主体结构的特定振动模式。该器件包括一对由电阻-电容-电感-电路分流的双压电晶片。这种TMD所需的最佳阻尼是由双压电晶片的PVEH效应产生的。介绍了这种双PVEH / TMD光束装置的理论基础，并通过其他分析方法进行了验证。仿真结果表明，通过对有效质量小于主体结构等效模态质量的2％的设备的电路进行适当调整，可以达到理想的振动衰减程度。拟议中的双PVEH / TMD梁装置结合了经典（机械）TMD和分流压电贴片（电气减振器）的相对优势，为功能更易适应的机电调谐减振器提供了前景。

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