Simulation Methods of Ultrasonic Guided Wave Propagation Mechanism and Sensor Deployment in Rail

2021 ◽  
pp. 437-446
Author(s):  
Miao Zhang ◽  
Guoqiang Cai ◽  
Ye Zhang
Keyword(s):  
Wave Propagation ◽  
Guided Wave ◽  
Sensor Deployment ◽  
Propagation Mechanism ◽  
Simulation Methods ◽  
Ultrasonic Guided Wave ◽  
Guided Wave Propagation

Ultrasonic Guided Wave Testing of Finned Tubing

2015 ◽  
Author(s):  
Owen M. Malinowski ◽  
Matthew S. Lindsey ◽  
Jason K. Van Velsor
Keyword(s):  
Wave Propagation ◽  
Guided Waves ◽  
Tube Wall ◽  
Guided Wave ◽  
Ultrasonic Guided Waves ◽  
Complex Nature ◽  
Inspection Method ◽  
Ultrasonic Guided Wave ◽  
Guided Wave Propagation ◽  
Wave Modes

In the past few decades, ultrasonic guided waves have been utilized more frequently Non-Destructive Testing (NDT); most notably, in the qualitative screening of buried piping. However, only a fraction of their potential applications in NDT have been fully realized. This is due, in part, to their complex nature, as well as the high level of expertise required to understand and utilize their propagation characteristics. The mode/frequency combinations that can be generated in a particular structure depend on geometry and material properties and are represented by the so-called dispersion curves. Although extensive research has been done in ultrasonic guided wave propagation in various geometries and materials, the treatment of ultrasonic guided wave propagation in periodic structures has received little attention. In this paper, academic aspects of ultrasonic guided wave propagation in structures with periodicity in the wave vector direction are investigated, with the practical purpose of developing an ultrasonic guided wave based inspection technique for finned tubing. Theoretical, numerical, and experimental methods are employed. The results of this investigation show excellent agreement between theory, numerical modeling, and experimentation; all of which indicate that ultrasonic guided waves will propagate coherently in finned tube only if the proper wave modes and frequencies are selected. It is shown that the frequencies at which propagating wave modes exist can be predicted theoretically and numerically, and depend strongly on the fin geometry. Furthermore, the results show that these propagating wave modes are capable of screening for and identifying the axial location of damage in the tube wall, as well as separation of the fins from the tube wall. The conclusion drawn from these results is that Guided Wave Testing (GWT) is a viable inspection method for screening finned tubing.

scholarly journals Experiment and Numerical Simulation of Ultrasonic Guided Wave Propagation in Bent Pipe

2015 ◽  
Vol 130 ◽  
pp. 1603-1611 ◽  
Author(s):  
M.X. Qi ◽  
P.G. Zhang ◽  
J. Ni ◽  
S.P. Zhou
Keyword(s):  
Numerical Simulation ◽  
Wave Propagation ◽  
Guided Wave ◽  
Ultrasonic Guided Wave ◽  
Guided Wave Propagation ◽  
Bent Pipe
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