Lima-Rodriguez Antonia, Garcia-Manrique Jose, Dong Wei, Gonzalez-Herrera Antonio
Department of Civil Engineering, Materials and Manufacturing, School of Engineering, University of Malaga, C/Arquitecto Francisco Peñalosa 6, 29071 Malaga, Spain.
VA Loma Linda Healthcare System and Department of Otolaryngology-Head & Neck Surgery, Loma Linda University Health, 11234 Anderson St., Loma Linda, CA 92354, USA.
Membranes (Basel). 2022 Mar 2;12(3):288. doi: 10.3390/membranes12030288.
A new, non-destructive methodology is proposed in this work in order to determine the mechanical properties of membrane using vibro-acoustic tests. This procedure is based on the dynamic analysis of the behavior of the membrane. When the membrane is subjected to a sound excitation it responds by vibrating based on its modal characteristics and this modal parameter is directly related to its mechanical properties. The paper is structured in two parts. First, the theoretical bases of the test are presented. The interaction between the sound waves and the membrane (mechano-acoustic coupling) is complex and requires meticulous study. It was broadly studied by means of numerical simulations. A summary of this study is shown. Aspects, such as the position of the sound source, the measuring points, the dimensions of the membrane, the frequency range, and the magnitudes to be measured, among others, were evaluated. The validity of modal analysis curve-fitting techniques to extract the modal parameter from the data measures was also explored. In the second part, an experimental test was performed to evaluate the validity of the method. A membrane of the same material with three different diameters was measured with the aim of estimating the value of the Young's modulus. The procedure was applied and satisfactory results were obtained. Additionally, the experiment shed light on aspects that must be taken account in future experiments.
本文提出了一种新的无损方法，用于通过振动声学测试确定膜的力学性能。该方法基于对膜行为的动态分析。当膜受到声激励时，它会根据其模态特性振动，而这种模态参数与它的力学性能直接相关。本文分为两部分。首先，介绍了测试的理论基础。声波与膜之间的相互作用（机械 - 声学耦合）很复杂，需要细致研究。通过数值模拟对其进行了广泛研究。展示了该研究的总结。评估了诸如声源位置、测量点、膜的尺寸、频率范围以及要测量的量等方面。还探讨了模态分析曲线拟合技术从数据测量中提取模态参数的有效性。在第二部分中，进行了实验测试以评估该方法的有效性。为了估计杨氏模量的值，对三种不同直径的相同材料的膜进行了测量。应用该程序获得了满意的结果。此外，该实验还揭示了未来实验中必须考虑的方面。
