Guided wave propagation in high-speed train axle and damage detection based on wave mode conversion

2015 ◽  
Vol 22 (9) ◽  
pp. 1133-1147 ◽  
Author(s):  
Fucai Li ◽  
Xuewei Sun ◽  
Jianxi Qiu ◽  
Limin Zhou ◽  
Hongguang Li ◽  
...  
Keyword(s):  
Wave Propagation ◽  
Damage Detection ◽  
High Speed ◽  
Mode Conversion ◽  
Wave Mode ◽  
Guided Wave ◽  
High Speed Train ◽  
Guided Wave Propagation

Laser vibrometry for guided wave propagation phenomena visualisation and damage detection

2010 ◽  
Author(s):  
Pawel Malinowski ◽  
Tomasz Wandowski ◽  
Pawel Kudela ◽  
Wieslaw Ostachowicz ◽  
E. P. Tomasini
Keyword(s):  
Wave Propagation ◽  
Damage Detection ◽  
Guided Wave ◽  
Laser Vibrometry ◽  
Guided Wave Propagation

Ultrasonic guided wave propagation across waveguide transitions: Energy transfer and mode conversion

2013 ◽  
Vol 133 (5) ◽  
pp. 2624-2633 ◽  
Author(s):  
Padmakumar Puthillath ◽  
Jose M. Galan ◽  
Baiyang Ren ◽  
Cliff J. Lissenden ◽  
Joseph L. Rose
Keyword(s):  
Wave Propagation ◽  
Energy Transfer ◽  
Mode Conversion ◽  
Guided Wave ◽  
Ultrasonic Guided Wave ◽  
Guided Wave Propagation ◽  
Waveguide Transitions

scholarly journals Phased Array Beamsteering in Composite Laminates for Guided Wave Structural Health Monitoring

2013 ◽  
Author(s):  
Peter Osterc ◽  
Daewon Kim ◽  
Byungseok Yoo
Keyword(s):  
Wave Propagation ◽  
Composite Laminates ◽  
Phased Array ◽  
Linear Array ◽  
Wave Mode ◽  
Guided Wave ◽  
Isotropic Case ◽  
Inherent Anisotropy ◽  
Guided Wave Propagation ◽  
And Performance

In this study, a guided wave phased array beamsteering approach is applied to composite laminates. Current beamsteering algorithms derived for isotropic materials assume omnidirectional wave propagation. Due to inherent anisotropy in composites, guided wave propagation varies with direction and wavefronts no longer have perfect circular shapes. By examining slowness, velocity and wave curves for a given composite laminate, the wavefront from a single source can be described as a function of the angle of propagation and distance from origin. Using this approach, a generic delay and sum beamforming algorithm for composite laminates is developed for any desired wave mode. It is shown that anisotropic wave mode regions can be effectively used for beamsteering in certain directions with a linear array and performance similar or even better than isotropic case. However, the useful range of angles with a 1d linear array for anisotropic wave modes is quite small and other directions exhibit undesired grating lobes and large sidelobes.

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