Department of Measurements and Control Systems, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, Poland.
Sensors (Basel). 2020 Jul 22;20(15):4084. doi: 10.3390/s20154084.
Analysis of the structural vibration, under the sound excitation is an important part of the quality assurance during the design process of devices. One of the most commonly used method is Laser Doppler Vibrometry (LDV). However, under the rapid fluctuations of temperature, structural resonances are shifted into the other frequencies. In such situation LDV method may be inconvenient, due to the scanning time. In this paper the authors proposed Chladni figures to modal analysis of the double-panel structure, excited by the loudspeaker enclosed inside the casing with a rigid frame. Double-panel structure has been proven to be particularly useful for noise and vibration reduction applications. Vision images, obtained during the experiments are converted to binary patterns, using GLCM matrix, and compared with simulations performed in ANSYS.
在设备设计过程中，对受声音激励的结构振动进行分析是质量保证的重要组成部分。最常用的方法之一是激光多普勒振动计（LDV）。然而，在温度快速波动的情况下，结构共振会转移到其他频率。在这种情况下，由于扫描时间，LDV 方法可能不太方便。本文作者提出了用蔡氏图形对由扬声器激励的、带有刚性框架的外壳的双面板结构进行模态分析。双面板结构已被证明在噪声和振动减少应用中特别有用。实验过程中获得的视觉图像，使用 GLCM 矩阵转换为二值模式，并与 ANSYS 中执行的模拟进行比较。
