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A Modelling Framework for Simulation of Ultrasonic Guided Wave-based Inspection of Welded Rail Tracks by Dineo A. Ramatlo; Craig S. Long; Philip W. Loveday; Daniel N. Wilke is a Engineering article available to read on EtoBox.

What is A Modelling Framework for Simulation of Ultrasonic Guided Wave-based Inspection of Welded Rail Tracks about?

A modelling framework for ultrasonic inspection of waveguides with arbitrary discontinuities, excited using piezoelectric transducers, is developed. The framework accounts for multi-modal, dispersive and damped one dimensional propagation over long distances. The proposed model is applied to simulate a realistic guided wave-based inspection of a welded rail. The framework models the excitation, propagation and scattering of guided waves from welds by respectively employing a hybrid model that couples a 3D FEM model of a piezoelectric transducer with a 2D SAFE model of the rail; a 2D SAFE model of the rail; and another hybrid method which couples a 3D FEM model of the arbitrary discontinuity (weld) with two SAFE models of the rail to represent the semi-infinite incoming and outgoing waveguides. Optimal damping parameters for hysteretic and viscous damping, respectively, are determined using a model updating procedure to approximate attenuation in the rail. Good agreement between the experimental measurement and simulation is demonstrated, even for weld reflections originating over 640 m from the transducer location. The proposed physics-based framework can be used to efficiently per

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Author

Dineo A. Ramatlo; Craig S. Long; Philip W. Loveday; Daniel N. Wilke

Publisher

Elsevier BV

Published

2020

Language

EN

Field

Engineering (Physical Sciences)