Propagation of Nonplanar SH Waves Emanating from a Fault Source around a Lined Tunnel

Boundary Element Analysis of a Lined Tunnel Problem

The boundary element technique is a practical problem-solving tool and useful in comparison to other currently popular alternatives. In this paper, a circular tunnel of a diameter 3.4 m is to be excavated through a clayey soil and surrounded by concrete lining of a thickness 0.2 m, so the clear internal diameter is 3.0 m. A plane strain analysis is adopted for such problem and the soil is assum...

Method of Green’s Function for Characterization of SH Waves in Porous-Piezo Composite Structure with a Point Source

An approach of Green’s function is adopted to solve the inhomogeneous linear differential equations representing wave equations in piezo-composite materials. In particular, transference of horizontally polarised shear (SH) waves is considered in bedded structure comprising of porous-piezo electric layer lying over a heterogeneous half-space. Propagation of SH-waves is considered to be influence...

Shear horizontal (SH) ultrasound wave propagation around smooth corners.

Shear horizontal (SH) ultrasound guided waves are being used in an increasing number of non-destructive testing (NDT) applications. One advantage SH waves have over some wave types, is their ability to propagate around curved surfaces with little energy loss; to understand the geometries around which they could propagate, the wave reflection must be quantified. A 0.83mm thick aluminium sheet wa...

Source and Propagation Effects of Rayleigh Waves From

A reference point equalization method has been developed which enables 'the separation of source and propagation effects of surface waves. The method works on seismic events located in a small source region, which allows us to assume that all events share the same path effects to a given receiver. Two important steps in the method are initialization and iteration. Initialization obtains the fir...

Wave Propagation from a Line Source Embedded in a Fault Zone