TOPOLOGICAL IMAGING IN LAYERED PLATE BY GUIDED WAVES

摘要：

The defect imaging by guided waves in layered plate is always an attractive project in non-destructive testing.The aim of this paper is to study the topological imaging theory and to determine whether it is possible to give the locations of all the defects in layered plate.A two-layered plate consist of aluminum and steel is considered.First,the formulas of the topological gradient are deduced theoretically.It is proved that the topological gradient is just a function in space domain and could indicate the defects’ locations at the extreme value point.Then,according to the method of the topological imaging,the solutions of two situations are required,the forward problem and the adjoint problem,respectively.The model building and propagation of guided waves are all simulated in finite element software ANSYS.It is found that all the defects are located precisely at the topological image,which suggests that topological imaging can be an efficient method to obtain all the defects’ locations in layered plate.

关键词： Layered plate Topological imaging Guided wave inspection Finite element method

作者: Chao ZHANG Shou-guo YAN Bi-xing ZHANG Wen-han LV

作者单位: State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences,Beijing, 1001 State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences,Beijing, 1001

会议类型: 国际会议

会议名称: The 2016 Symposium on Piezoelectricity,Acoustic Waves and Device Applications(2016全国压电和声波理论及器件技术研讨会)

会议地点: 西安

会议语种:英文

页码: 41-44

在线出版日期: 2016-10-21（万方平台首次上网日期，不代表论文的发表时间）