| 邹明霞,关立强,李义丰.基于时间反转加权分布的复合材料Lamb波损伤成像[J].声学技术,2021,40(5):630~638 |
| 基于时间反转加权分布的复合材料Lamb波损伤成像 |
| Lamb wave damage imaging of composite plate based on time reversal and weighted distribution |
| 投稿时间：2020-04-17 修订日期：2020-04-29 |
| DOI：10.16300/j.cnki.1000-3630.2021.05.007 |
| 中文关键词: 复合材料 Lamb波 时间反转 加权分布 损伤成像 |
| 英文关键词: composite materials Lamb wave time reversal weighted distribution damage imaging |
| 基金项目:国家自然科学基金（61571222）资助项目、江苏省“六大人才高峰”高层次人才项目 |
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| 中文摘要: |
| 超声Lamb波是检测板状结构损伤的常用方法，然而碳纤维增强聚合物基复合材料（Carbon Fiber ReinforcedPlastics，CFRP）本身的各向异性会对Lamb波的损伤成像和定位造成很大的影响。且大多数检测方法均采用健康结构的检测信号作为参考信号，用差信号的方法来实现损伤成像，该过程容易受到待测结构和实验环境变化等外界因素的影响。针对该问题，采用时间反转和加权分布成像相结合的方法，将其应用在复合材料板状结构的Lamb波损伤检测和成像中。仿真结果表明，该方法能够有效地实现板中单源脱层损伤和多源脱层损伤的二维成像与定位，且具有较高的精度和准确性。 |
| 英文摘要: |
| Ultrasonic Lamb wave method is a common way to detect the structural damage of plate structure. However, the anisotropy of carbon fiber reinforced plastics (CFPR) material properties has a greatly effect on the accuracy of Lamb wave based damage imaging and location. Most detection methods use the detection signal of health structure as the reference signal, and use the difference signal method to realize the damage imaging, however, the detection is easy to be affected by the changes in the structure to be tested and the experimental environment. To solve this problem, a combination of time reversal and weighted distribution imaging is applied to detect the damage in composite sheet materials by Lamb wave. The simulation results show that the method can effectively realize two-dimensional imaging and localization of single delamination damage, multi-delamination damage in the plate with high accuracy. |
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