Numerical simulation of elastic waves for visualization of defects

摘要: Abstract Due to aging of civil infrastructure, non-destructive testing (NDT) is continuously increasing significance. The ultimate aim the detection defects in interior a structure with highest possible accuracy, order proceed specific repair action. Pulse velocity tomography technique visualize interior. Using number pulsers and receivers for introduction recording transient elastic wave at different points on surface structure, potentially dense network interconnecting paths are examined as their transit time. Each “cell” cross section assigned value visualized. However, confirmation results not always except cases where cracks visible from or case model placed during casting specimens. In present paper numerical simulations propagation were conducted geometries. Different types inhomogeneity applied, such voids, deteriorated zones, well steel reinforcing bars. time information calculated these cases, led corresponding tomograms. Based comparison between actual geometry void tomograms, accuracy studied, parameters improve testing, like applied excitation frequency sensors.