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Accuracy of semi-analytical finite elements for modelling wave propagation in rails

Author: Andhavarapu, EV ; Loveday, Philip W ; Long, Craig S ; Heyns, PS Date: Jan 2010 The semi-analytical finite element method (SAFE) is a popular method for analysing guided wave propagation in elastic waveguides of complex cross-section such as rails. The convergence of these models has previously been studied for linear ... Read more
Development of an optimal piezoelectric transducer to excite guided waves in a rail web

Author: Ramatlo, Dineo AM ; Wilke, DN ; Loveday, Philip W Date: Apr 2018 Ultrasonic transducers have demonstrated the ability to effectively excite guided waves that can propagate over long distances and are thus employed in monitoring systems. An ultrasonic piezoelectric transducer that strongly excites a mode ... Read more
Feasibility of detecting cracks in rail track at long range using guided wave ultrasound

Author: Loveday, Philip W ; Long, Craig S Date: Jan 2014 A transducer array comprising four transducers was developed and used to perform pulse – echo measurements on a heavy duty welded rail track. A signal processing algorithm, which uses properties of the propagating modes computed using ... Read more
Guided elastic waves produced by a periodically joined interface in a rock mass

Author: Yenwong Fai, AS ; Durrheim, RJ ; Hildyard, MW Date: Sep 2012 Mining-induced seismic events pose a serious risk to workers in deep mines. Accurate numerical simulations are useful in analyzing the problem and developing mitigation strategies. Here we tackle the problem of guided interfacial elastic wave ... Read more
Numerical characterisation of guided wave scattering due to welds in rails

Author: Long, Craig S ; Loveday, Philip W Date: Apr 2012 The analysis of travelling waves in elastic waveguides with complex cross-sections, such as train rails, can only conveniently be performed numerically. The semi-analytical finite element (SAFE) method has become a popular tool for performing ... Read more
Numerical evaluation of pulse-echo damage detection in train rail

Author: Long, Craig S ; Loveday, Philip W Date: Jan 2014 A guided wave based monitoring system for welded freight rail, has previously been developed. The existing system was designed to only detect complete breaks. Current research efforts are focused on including a pulse-echo mode of operation ... Read more

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Browsing by Subject "Guided waves"

Browsing by Subject "Guided waves"

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