Abstract
<p>Cable damage is one of the typical diseases of cable supported bridges. Acoustic emission (AE) technique, as a dynamic and non-destructive technique, can be applied to the health monitoring of bridge cables, while the propagation characteristics of AE signals in bridge cables is the key problem. The goal of this paper is to theoretically investigate the time-transient responses of single wire waveguide under excitation. Firstly, a formulation based on semi-analytic finite element (SAFE) method was proposed to calculate the time-transient response in cylindrical waveguides. Next a high tensile strength steel wire with 5mm diameter was used as an example to calculate its displacement responses under narrowband excitation and broadband excitation respectively, with damping effect considered. The results illustrated the propagation characteristics of AE signals in single wire waveguide.</p>
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