| 振动疲劳对压电悬臂板电激励响应的影响 |
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| 引用本文： | 方孟翔,刘文光,吴兴意,吕志鹏,陈红霞,冯逸亭.振动疲劳对压电悬臂板电激励响应的影响[J].失效分析与预防,2022,17(4):209-214, 219. |
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| 作者姓名： | 方孟翔 刘文光 吴兴意 吕志鹏 陈红霞 冯逸亭 |
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| 作者单位： | 南昌航空大学 航空制造工程学院，南昌 330063 |
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| 摘 要： | 针对压电智能结构的动力学设计，研究振动疲劳对双晶压电悬臂板电激励响应的影响。在电压激励下，测试压电悬臂板的自由端位移、致动层根部应变和传感层发电电压随振动循环次数的变化，分析激励电压幅值和电压波形对位移、应变及发电电压的影响，讨论位移响应、应变响应和发电电压响应随振动疲劳的变化情况。结果表明:在45~50 V的激励电压下，激励电压幅值越大，压电悬臂板的电致响应幅值下降越多，疲劳损伤速率越快；正弦波电压激励相较于三角波电压激励更容易导致振动疲劳；由于振动疲劳损伤的非线性，压电悬臂板疲劳损伤前后的位移?应变曲线斜率不再一致，而且疲劳损伤后共振时压电悬臂板根部应变降低。试验结果可为压电智能结构的动力学设计提供数据支撑。
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| 关 键 词： | 压电悬臂板 电激励 振动疲劳 发电响应 |
| 收稿时间： | 2022-03-24 |
Influence of Vibration Fatigue on Electric Induced Response of Piezoelectric Cantilever Plates |
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| FANG Meng-xiang,LIU Wen-guang,WU Xing-yi,LV Zhi-peng,CHEN Hong-xia,FENG Yi-ting.Influence of Vibration Fatigue on Electric Induced Response of Piezoelectric Cantilever Plates[J].Failure Analysis and Prevention,2022,17(4):209-214, 219. |
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| Authors: | FANG Meng-xiang LIU Wen-guang WU Xing-yi LV Zhi-peng CHEN Hong-xia FENG Yi-ting |
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| Abstract: | According to the dynamic design of piezoelectric smart structures, the impacts of vibration fatigue on the electric induced response of bimorph piezoelectric cantilever plates were studied. Excited by external potential, the variation of the free end displacement of piezoelectric cantilever plates, the actuating layer root strain, and the generation voltage of sensing layer with the vibration fatigue cycles were tested. Besides, we analyzed the impacts of the excitation voltage amplitude and voltage waveform on the displacement, strain and the generating voltage. And the displacement response, strain response, generating voltage response are also discussed. The results show that under the excitation voltage of 45~50 V, greater excitation voltage amplitude, would makes decreased electric induced response amplitude of piezoelectric cantilever plates, and faster fatigue damage rate. The sine wave excitation is more prone to cause fatigue compared to triangle wave. Moreover, as the fatigue damage of piezoelectric cantilever plates is nonlinear, the displacement-strain curves before and after fatigue are no longer consistent, and the root strain of piezoelectric cantilever plates at resonance decreases after the fatigue damage. The experimental results can provide data support for the dynamic design of piezoelectric smart structures. |
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