| 摘要: |
| 超声导波具有在传播路径上能量衰减小，传播距离远，可以实现大范围、全方位管路监测的优点，在航天飞行器管路监测领域具有巨大的潜在应用价值。建立了飞行器管路损伤和典型管路异质界面（焊缝、充气/充液管路）模型，研究了超声导波在管路损伤和典型异质界面耦合中传播机理，为飞行器管路损伤提取和定量评估提供了有效的分析手段。 |
| 关键词: 管路 异质界面 超声导波 传播机理 有限元分析 |
| DOI： |
|
| 基金项目:国家自然科学基金（51505036） |
|
| Propagation Mechanism and Simulation Analysis of UGW in the Defects and the Heterogeneous Interfaces of Aircraft Pipeline |
| SUN Hailiang,LU Haoran,CHEN Haipeng,LIAO Chuanjun,WU Yuanhao |
| (Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China;China Academy of Launch Vehicle Technology, Beijing 100076, China) |
| Abstract: |
| The ultrasonic guided wave (UGW) has several advantages, such as less attenuation and longer distance on the propagation path, when compared with conventional non-destructive testing methods. It can monitor the pipelines in a wide range and full length. UGW has potential values on the defect assessment for pipelines of aircrafts. The propagation mechanism of UGW in the defects and the heterogeneous interfaces of pipelines was studied by using their dynamic models. It provides the effective methods for fault feature detection and quantitative assessment for the pipelines of aircrafts. |
| Key words: Pipelines Heterogeneous interfaces Ultrasonic guided wave Propagation mechanism Finite element analysis |