Finite Element Analysis of guided waves for NDT
| Testing of pipes under a road surface using Teletest ® guided wave technology system. Picture courtesy of Plant Integrity Ltd ( www.plantintegrity.com) |
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The inspection of engineering structures using long-range guided waves is attractive because it is possible to investigate complete material volumes in regions over 100m away from the point of measurement. Because effective inspections require a good understanding of the different vibration modes, finite element modelling is a powerful tool in assessing feasibility of guided wave inspections.
Generation of dispersion curves
- Identification of non-dispersive wave modes
- Elimination of unwanted modes
- Accurate location of defects
Wave propagation analysis
- Assessment of modes sensitive to defects
- Investigation of branch connections (pipe)
- Investigation of constrained structures (pipe, rail)
- Evaluation of most geometric configurations
Benefits of using guided waves for inspection
Benefits of guided wave modelling
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Dispersion curves for a typical rail section with pictures of some wave modes
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Results of analysis - contour plot of axial displacement
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To find out more about how TWI could benefit your company, please contact us at fea@twi.co.uk
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