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In-Plane Vibration of Membrane Strips and Sheets with Piezoelectric Actuation and Sensing

机译:压电致动和传感的膜片和片的平面内振动

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The studies reported on in this paper are of relevance to automated diagnosis of light weight space structures based on membranes. We investigate in-plane vibration response of membranes to in-plane actuation. Iden-tically shaped piezoelectric polymer strips are used both for actuation and sensing. For membrane strips, the frequency response function is obtained using an in-plane vibration model. The model for the intact membrane is then modified to analyze the effect of a transverse crack at mid-span. The theoretical results are compared with experimental measurements. Experiments on a cracked strip show small differences in the frequency re-sponse function, which are qualitatively borne out by the theoretical calculations. Some experimental results on membrane sheets are also presented.
机译:本文报道的研究与基于膜的轻型空间结构的自动诊断有关。我们研究了膜对平面驱动的平面振动响应。相同形状的压电聚合物条既用于致动,又用于感测。对于膜条,使用面内振动模型获得频率响应函数。然后修改完整膜的模型,以分析中跨处横向裂缝的影响。将理论结果与实验测量结果进行比较。在裂纹带材上进行的实验表明,频率响应函数的细微差别由理论计算定性地证实了。还介绍了一些在膜片上的实验结果。

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