基于能量回收原理的宽频结构吸振装置的设计与优化

发布时间：2018-07-14 21:36

【摘要】：传统的结构吸振装置利用质量阻尼、液体阻尼或是材料自身的消耗来吸收结构的振动能量,本文探讨的是采用压电陶瓷组成比传统结构吸振装置有效频带更宽的动力吸振装置。本文首先论述了采用压电陶瓷组成力电耦合的振动吸收单元的可行性。进而将压电过程等效为力学模型,考虑恢复力的延迟效应添加非线性修正项。然后对该力学模型进行优化计算,得到在吸振器有效带宽最宽的情况下压电陶瓷参数所应满足的条件。最后提出了一种装置作为本文理论的实施例,该实施例中压电元件受外界振动元件激励产生强迫振动,动力吸振器发生强共振作用从而驱动压电元件产生交变的电流,交变电流经能量采集电路整流滤波后获得了较稳定的直流电,从而进行存储或者直接利用。
[Abstract]:The traditional structural vibration absorbers absorb the vibration energy of the structure by using the mass damping, the liquid damping or the consumption of the material itself. In this paper, the dynamic absorption mechanism of the piezoelectric ceramics is discussed. In this paper, the vibration absorption of the combined force and electrical coupling of the piezoelectric ceramics is discussed. The piezoelectric process is then equivalent to the mechanical model, and the nonlinear correction term is added to the delay effect of the restoring force. Then the mechanical model is calculated to obtain the conditions that the piezoelectric ceramic parameters should be satisfied when the effective bandwidth of the vibration absorber is the most wide. In this case, the piezoelectric element is driven by the external vibration element to produce forced vibration, and the dynamic vibration absorber will have strong resonance to drive the piezoelectric element to produce alternating current. The alternating current through the energy acquisition circuit is rectified and filtered to obtain a more stable direct current, which can be stored or used directly.
【作者单位】：重庆大学土木工程学院;重庆大学弘深学院;重庆大学山地城镇建设与新技术教育部重点实验室;
【基金】：国家级大学生创新训练项目(201310611040)
【分类号】：TU352.1

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