نتایج جستجو برای: sh waves

تعداد نتایج: 125794  

Journal: :Symmetry 2023

The behavior of surface horizontally polarized shear waves (SH waves) in the composite multi-material structure with a periodic irregular and interface is investigated analytically present study. To unravel enshrouded features SH-wave propagation multi-layer structure, we consider model three distinct materials. In schematic problem, guiding layer (M-I) contains fluid-saturated porous materials...

Journal: :Geophysical Journal of the Royal Astronomical Society 2010

2004
Francesco Simonetti

Research into ultrasonic guided wave non-destructive testing for the long range inspection of large metallic structures is now well advanced. The main advantage of this method is that a large area can be covered from a given transducer position, so avoiding expensive scanning of all the structure surface. However, in the presence of attenuative coatings the test range can be dramatically reduce...

2014
Dongmei Liu Yong Zhang Jianming Wen Zhenhua Chen Dunzhao Wei Xiaopeng Hu Gang Zhao S. N. Zhu Min Xiao

We report a simple, novel subdiffraction method, i.e. diffraction interference induced superfocusing in second-harmonic (SH) Talbot effect, to achieve focusing size of less than λSH/4 (or λpump/8) without involving evanescent waves or subwavelength apertures. By tailoring point spread functions with Fresnel diffraction interference, we observe periodic SH subdiffracted spots over a hundred of m...

Journal: :TWMS Journal of Applied and Engineering Mathematics 2019

Journal: :Geophysical Journal International 2013

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