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Modeling wave propagation and scattering from impact damage for structural health monitoring of composite sandwich plates

机译:模拟冲击破坏引起的波传播和散射,用于复合夹芯板的结构健康监测

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摘要

Results of modeling of the wave propagation, impact, and damage detection in a sandwich honeycomb plate using piezoelectric actuator/sensor scheme are reported. A finite element model of honeycomb sandwich panel that reproduces accurately experimental setup and takes into account main characteristic features of the real composite panel, impactor, lead zirconate titanate actuator, and sensors is developed. The impact is simulated to obtain damage with parameters close to those observed in the experiment. Both in simulations and in experiment, the voltage signal of a given shape is applied to the lead zirconate titanate actuators to excite acoustic wave, and the electrical signals collected from the lead zirconate titanate sensors mounted to the panel are used to study wave propagation in the sandwich panel. The results of simulation are shown to be in good agreement with the experimental results both before and after the impact. Properties of acoustic wave propagating in composite sandwich honeycomb panels are discussed.
机译:报告了使用压电致动器/传感器方案对夹层蜂窝板中的波传播,冲击和损伤检测进行建模的结果。开发了蜂窝夹芯板的有限元模型,该模型可以精确地再现实验设置,并考虑了实际复合板,冲击器,锆钛酸铅钛酸盐致动器和传感器的主要特征。模拟冲击以获得参数接近实验中观察到的损伤。在仿真和实验中,都将给定形状的电压信号施加到钛酸锆钛酸铅执行器上,以激发声波,并且从安装在面板上的钛酸锆钛酸铅传感器收集的电信号用于研究电磁波在管道中的传播。夹心板。结果表明,模拟结果与冲击前后的实验结果吻合良好。讨论了复合夹层蜂窝板中声波的传播特性。

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