• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Simulation of Lamb wave propagation for the characterization of complex structures
【24h】

Simulation of Lamb wave propagation for the characterization of complex structures

机译：Lamb波传播的模拟，用于表征复杂结构

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Reliable numerical simulation techniques represent a very valuable tool for analysis. For this purpose we investigated the applicability of the local interaction simulation approach (LISA) to the study of the propagation of Lamb waves in complex structures. The LISA allows very fast and flexible simulations, especially in conjunction with parallel processing, and it is particularly useful for complex (heterogeneous, anisotropic, attenuative, and/or nonlinear) media. We present simulations performed on a glass fiber reinforced plate, initially undamaged and then with a hole passing through its thickness (passing-by hole). In order to give a validation of the method, the results are compared with experimental data. Then we analyze the interaction of Lamb waves with notches, delaminations, and complex structures. In the first case the discontinuity due to a notch generates mode conversion, which may be used to predict the defect shape and size. In the case of a single delamination, the most striking "signature" is a time-shift delay, which may be observed in the temporal evolution of the signal recorded by a receiver. We also present some results obtained on a geometrically complex structure. Due to the inherent discontinuities, a wealth of propagation mechanisms are observed, which can be exploited for the purpose of quantitative nondestructive evaluation (NDE).
机译：可靠的数值模拟技术代表了非常有价值的分析工具。为此，我们研究了局部相互作用模拟方法（LISA）在研究Lamb波在复杂结构中传播时的适用性。 LISA允许非常快速和灵活的仿真，尤其是与并行处理结合使用时，它对于复杂（非均质，各向异性，衰减和/或非线性）介质特别有用。我们介绍了在玻璃纤维增​​强板上进行的模拟，该模拟最初没有损坏，然后有一个贯穿其厚度的孔（通过孔）。为了验证该方法，将结果与实验数据进行了比较。然后，我们分析了Lamb波与缺口，分层和复杂结构的相互作用。在第一种情况下，由于缺口造成的不连续会产生模式转换，该模式转换可用于预测缺陷的形状和大小。在单个分层的情况下，最明显的“签名”是时移延迟，这可以在接收机记录的信号的时间演变中观察到。我们还介绍了在几何复杂结构上获得的一些结果。由于固有的不连续性，观察到了大量的传播机制，可以将其用于定量无损评估（NDE）。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号